P-E-EVSE-01—Procedures applicable to specifications for approval of type of electric vehicle supply equipment

Category: Electric vehicle supply equipment
Issue date: 2022-12-30
Effective date: 2022-12-30
Revision number: N/A
Supersedes: N/A


Table of contents


1.0 Purpose

These procedures provide instructions for testing of electric vehicle supply equipment (EVSE) presented for approval of type pursuant to the requirements of S-E-EVSE-01—Specifications for approval of type of electric vehicle supply equipment. These procedures are intended to provide general instructions that may be supplemented by additional details in Measurement Canada laboratory procedures.

2.0 Scope

These procedures apply to all EVSE within the scope of S-E-EVSE-01—Specifications for approval of type of electric vehicle supply equipment.

3.0 Authority

These procedures are issued under the authority of section 12 of the Electricity and Gas Inspection Act.

4.0 References

5.0 Definitions

All definitions in S-E-EVSE-01 are applicable to these procedures.

6.0 Approval test programs

Testing of EVSE is done using the same transactional process as is used in normal operation of the EVSE. This process consists of at least the following steps:

  1. Initiating a charging session using the standard handshake exchange between the EVSE and a vehicle.
  2. Charging at a specified power level for a specified quantity of energy (must be greater than the MMQ).
  3. Terminate the transaction as would an electric vehicle.
  4. Compare the energy delivered and transaction cost provided by the EVSE with the test equipment.
  5. Compare the energy received and transaction cost provided by the EVSE with the test equipment.

The initial intrinsic error must be determined as the first test on the EVSE, as described in 6.2.1.

Power must be applied to the EVSE for a period of 15 minutes before the start of testing.

The order of the test points for initial intrinsic error must be from lowest current to highest current and then from highest current to lowest current. For each test point, the resulting error must be the mean of these measurements. In each case, two times the minimum measured quantity of energy must be delivered.

The determination of the initial intrinsic error (at reference conditions) must always be carried out before tests of influence quantities and before disturbance tests that relate to a limit of error shift requirement or to a significant fault condition for error.

Otherwise, the order of tests is not prescribed in this document.

If an EVSE is specified for both single phase and three phase operation, then both configurations must be tested.

The tests identified are the minimum that must be applied; however, additional tests may be performed where deemed necessary by the approvals laboratory.

6.1 Test procedures for type approval

6.1.1 Test conditions

Unless otherwise stated in the individual test instructions, all influence quantities except for the influence quantity being tested must be held at reference conditions as given by Table 1 during type approval tests.

Table 1: Reference Conditions and Their Tolerances
Quantity Reference Conditions Tolerance
Voltage(s) Highest U nom ±1%
Ambient temperature 23ºC Footnote 1 ±2ºC
Frequency f nom ±0.3%
Waveform ( U and I ) Sinusoidal d ≤ 2%
Magnetic induction of external origin at reference frequency 0 T B ≤ 0.05 mT
Electromagnetic RF fields 30 kHz to 6 GHz 0 V/m ≤ 1 V/m
Operating position for instruments sensitive to position Mounting as stated by manufacturer ±3.0º
Load balance (3-phase EVSE) Footnote 2 Equal current in all current circuits ±2%

Note: The reference conditions and their tolerances are given to ensure reproducibility between testing laboratories, not to determine the accuracy of the tests. The demands on short-term stability during test for influence factors may be much higher than shown in this table.

Table 2: Load Conditions and Their Tolerances in Tests
Quantity Conditions Tolerance
Current Current range of device under test ±2%
Power factor Power factor range of device under test Current to voltage phase difference ±2º

Note: The load conditions and their tolerances are given to ensure reproducibility between testing laboratories, not to determine the accuracy of the tests. The demands on short-time stability during test for influence factors may be much higher than shown in this table.

For most tests, the measured power will be constant if the other influence quantities are kept constant at reference conditions. However, this is not possible for some tests such as influence of voltage variation and load unbalance. Therefore, the error shift must always be measured as the shift of the relative error and not of the absolute power.

6.2 Tests for compliance with maximum permissible errors

6.2.1 Determination of initial intrinsic error

Object of the test:
To verify that the error of the EVSE at reference conditions is less than the relevant BMPE given in Table 2 of S-E-EVSE-01.
Test procedure:
EVSE that is specified as being capable of bidirectional energy measurement as described in clause 7.6 of S-E-EVSE-01 must meet the relevant BMPE requirements of Table 2 for energy flow in both positive and negative directions.
Mandatory test points:
Tests must be conducted at unity power factor at I min , I tr , 50% I max  and I max for a delivered energy of at least the minimum measured quantity at each Unom. If an EVSE is rated for multiple frequencies it must be tested at all nominal frequencies.

6.2.2 Starting current

Object of the test:
To verify that the EVSE starts and continues to operate at I st as given by Table 1.
Test procedure:

The EVSE must be subjected to a current equal to the starting current I st for a delivered energy of the minimum measured quantity. If the EVSE is designed for the measurement of energy in both directions, then this test must be applied with energy flowing in each direction. The effect of an intentional delay in measurement after reversal of energy direction should be taken into account when performing the test.

The EVSE must start and continue to register with a load current of Ist defined in Table 1 of S-E-EVSE-01.

Mandatory test points:
The voltage must be at the reference U nom.

6.3 Tests for influence quantities

General
The purpose of these tests is to verify the requirements of section 7.6.1 of S-E-EVSE-01 due to the variation of a single influence quantity.

6.3.1 Temperature dependence

Object of the test:
To verify that the temperature coefficient requirements of Table 3 of S-E-EVSE-01 are fulfilled.
Test procedure:

For each test point, the error of the EVSE must be determined at each of the upper and lower ambient temperature limits specified for the EVSE, and at each of the temperatures following list that fall in between the specified limits:

  • -55ºC, -40ºC, -25ºC, -10ºC, +5ºC, +23ºC, +40ºC, +55ºC, +70ºC, +85ºC

Furthermore, for each pair of test points, the temperature coefficient (c) must be determined as follows:

c = e u e l t u t l

where e u and e l are the errors at the upper and the lower temperatures respectively in the temperature interval of interest; and t u and t l are the upper and the lower temperatures, respectively, in the temperature interval of interest.

Each temperature coefficient must be in accordance with the requirements of Table 3 of S-E-EVSE-01.

Mandatory test points:
The test must be performed, at minimum, at PF = 1 for currents of 50% I max.

6.3.2 Self heating

Object of the test:
To verify that the EVSE is able to carry I max continuously as specified in Table 4 of S-E-EVSE-01.
Test procedure:
The test must be carried out as follows: The test must be conducted for six hours or for the time required to deliver 60 kWh of energy, whichever is shorter. The test must be performed at I max.  The error shift compared to the intrinsic error must comply with the requirements given in Table 4 of S-E-EVSE-01.

6.3.3 Voltage variation

Object of the test:
To verify that the error shift due to voltage variations complies with the requirements of Table 4 of S-E-EVSE-01.
Test procedure:
The error shift, compared to the intrinsic error at U nom, must be measured when the voltage is varied within the corresponding rated operating range. For poly-phase EVSE, the test voltage must be balanced.
Mandatory test points:
If all U nom are in the range of 208V to 240V, then tests must be run at 200V and 250V. Otherwise, if several U nom values are stated, the test must be run at the 0.9 times the lowest U nom, all U nom and 1.1 times the highest U nom. The test current must be 50% I max.
Acceptance criteria:
The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

6.3.4 Frequency variation

Object of the test:
To verify that the error shift due to frequency variations complies with the requirements of Table 4 of S-E-EVSE-01.
Test procedure:
The error shift, compared to the intrinsic error at f nom, must be measured when the frequency is varied within the corresponding rated operating range. If several f nom values are stated, the test must be repeated with each f nom value.
Mandatory test points:
The test must, at minimum, be performed at PF = 1 for a current of 50% I max , and at frequencies of 105% f nom and 95% f nom.
Acceptance criteria:
The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

6.3.5 Harmonics in voltage and current

Object of the test:
To verify that the error shift due to harmonics complies with the requirements in S-E-EVSE-01.
Test procedure:

The error shift, compared to the intrinsic error at sinusoidal conditions, must be measured under each set of conditions described below.

Harmonic amplitudes are calculated relative to the amplitude of the fundamental frequency component of the voltage or current. Phase angle is calculated relative to the zero-crossing of the fundamental frequency voltage or current component.

Mandatory test points:
The test must be performed, at minimum, at 50% I max, PF = 1, where the power factor is given for the fundamental component.
Test #1:

With a sinusoidal voltage of the highest U nom and current of waveform EV#1 with a fundamental of 50% I max, measure the energy for a delivery of not less than MMQ.

The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

Test #2:

With voltage of waveform EV#1 with the fundamental equal to the highest U nom and current of waveform EV#1 with a fundamental of 50% I max, measure the energy for a delivery of not less than MMQ.

The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

Test #3:

With voltage waveform EV#2 with the fundamental equal to the highest U nom and current waveform EV#1 with a fundamental of 50% I max, measure the accuracy for a delivery of not less than MMQ.

The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

Acceptance criteria:

The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

Table 3: EV Waveform #1
Harmonic Number Amplitude
(%)
Phase Angle
(°)
Harmonic
number
Amplitude
(%)
Phase Angle
(°)
1 100.00 0 2 0.25 188
3 3.00 217 4 0.20 150
5 2.40 212 6 0.16 232
7 2.28 159 8 0.15 205
9 2.16 143 10 0.14 165
11 2.05 254 12 0.00 -
13 1.95 95 14 0.00 -
15 1.85 188 16 0.00 -
17 1.76 266 18 0.00 -
19 1.67 168 20 0.00 -
21 1.59 216 22 0.00 -
23 1.51 216 22 0.00 -
23 1.43 240 26 0.00 -
27 1.36 120 28 0.00 -
29 1.29 239 30 0.00 -
31 1.23 29 32 0.00 -
33 1.17 133 34 0.00 -
35 1.11 59 36 0.00 -
37 1.05 135 38 0.00 -
39 1.00 370 40 0.00 -

Figure 1: EV Waveform #1

Long description of Figure 1
Figure 1: EV Waveform #1
Harmonic Number Amplitude
(%)
Phase Angle
(°)
1 100.00 0
2 0.25 188
3 3.00 217
4 0.20 150
5 2.40 212
6 0.16 232
7 2.28 159
8 0.15 205
9 2.16 143
10 0.14 165
11 2.05 254
12 0 -
13 1.95 95
14 0 -
15 1.85 188
16 0 -
17 1.76 266
18 0 -
19 1.67 168
20 0 -
21 1.59 216
22 0 -
23 1.51 247
24 0 -
25 1.43 240
26 0 -
27 1.36 120
28 0 -
29 1.29 239
30 0 -
31 1.23 29
32 0 -
33 1.17 133
34 0 -
35 1.11 59
36 0 -
37 1.05 135
38 0 -
39 1.00 370
40 0 -

A waveform is developed using the data contained in the table and applying the formula:

Α = Σ n = 1 N Α p sin ( n 2 π 60 t + 0 n )

The amplitude A of the waveform plot is determined by the formula where Ap is the percent amplitude of the harmonic relative to the fundamental theta n is derived from the phase displacement of a harmonic component (n) as provided in Table 3 and converted to radians.

 
Table 4: EV Waveform #2
Harmonic Number Amplitude
(%)
Phase
(°)
Harmonic
number
Amplitude
(%)
Phase
(°)
1 100 0 2 0.00 -
3 3.8 217 4 0.00 -
5 2.4 212 6 0.00 -
7 2.28 159 8 0.00 -
9 2.16 143 10 0.00 -
11 2.05 254 12 0.00 -
13 1.7 95 14 0.00 -
15 1.7 95 14 0.00 -
17 1.76 266 18 0.00 -
19 1.67 168 20 0.00 -
21 0.00 0.00 22 0.00 -
23 0.00 0.00 24 0.00  
25 0.00 0.00 26 0.00 -
27 0.00 0.00 28 0.00 -
29 0.00 0.00 30 0.00 -
31 0.00 0.00 32 0.00 -
33 0.00 0.00 34 0.00 -
35 0.00 0.00 36 0.00 -
37 0.00 0.00 38 0.00 -
39 0.00 0.00 40 0.00 -

Figure 2: Amplitude for EV #2 Waveform

Long description of Figure 2
Figure 2: Amplitude for EV #2 Waveform
Harmonic Number Amplitude
(%)
Phase Angle
(°)
1 100.00 0
2 0 -
3 3.80 217
4 0 -
5 2.40 212
6 0 -
7 2.28 159
8 0 -
9 2.16 143
10 0 -
11 2.05 254
12 0 -
13 1.7 95
14 0 -
15 1.85 188
16 0 -
17 1.76 266
18 0 -
19 1.67 168
20 0 -
21 0 -
22 0 -
23 0 -
24 0 -
25 0 -
26 0 -
27 0 -
28 0 -
29 0 -
30 0 -
31 0 -
32 0 -
33 0 -
34 0 -
35 0 -
36 0 -
37 0 -
38 0 -
39 0 -
40 0 -

A waveform EV waveform #1 is developed using the data contained in Table 4 and applying the formula:

Α = Σ n = 1 N Α p sin ( n 2 π 60 t + 0 n )

The amplitude A of the waveform plot is determined by the formula where Ap is the percent amplitude of the harmonic relative to the fundamental theta n is derived from the phase displacement of a harmonic component (n) as provided in Table 4 and converted to radians.

 

6.3.6 Reversed phase sequence (any two phases interchanged)

Object of the test:
To verify that the error shift due to interchanging any two of the three phases complies with the requirements of Table 4 of S-E-EVSE-01. This test applies only to three-phase meters.
Test procedure:
The error shift, compared to the intrinsic error at reference conditions, must be measured when any two of the three phases are interchanged.
Mandatory test points:
The test must be performed, at minimum, at a reference current of 50 % I max, PF = 1 with any two of the three phases interchanged.
Acceptance criteria:
The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

6.3.7 Continuous (DC) magnetic induction of external origin

Table 5: Specifications of the Field Along Axis of the Magnet's Core
Distance from Magnet Surface Magnetic Induction Tolerance
30 mm 200 mT ±30 mT
Applicable standard:
None.
Object of the test:
To verify that the error shift due to continuous (DC) magnetic induction of external origin complies with the requirements of Table 4 of S-E-EVSE-01.
Test procedure:
The error shift, compared to the intrinsic error at reference conditions, must be measured when the EVSE is subjected to continuous magnetic induction with a probe in the form of a permanent magnet with a surface area of at least 2000 mm2. The magnetic field along the axis of the magnet's core must comply with details specified in Table 5.
Mandatory test points:
6 points per EVSE surface. The test must be performed, at minimum, at 50% I max, PF = 1. The greatest error shift is to be noted as the test result.
Acceptance criteria:
The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

Note: Neodymium or niobium permanent magnets are recommended for this test.

6.3.8 Magnetic field (AC, power frequency) of external origin

Applicable standard:
IEC 61000-4-8 and where applicable IEC 61851-21-x.
Object of the test:
To verify that the error shift due to an AC magnetic field at power frequency complies with the requirements of Table 4 of S-E-EVSE-01.
Test procedure in brief:
The error shift, compared to the intrinsic error at reference conditions, must be measured when the EVSE is exposed to a magnetic field at each f nom under the most unfavourable condition of phase and direction.
Test severity:
Continuous field, 400 A/m.
Mandatory test points:
The test must be performed, at minimum, at 50 % I max, PF = 1.
Acceptance criteria:
The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

6.3.9 Electromagnetic fields

6.3.9.1 Radiated, radio frequency (RF), electromagnetic fields
Applicable standard:
IEC 61000-4-3 and where applicable IEC 61851-21-x.
Object of the test:
To verify that the error shift due to radiated, radio frequency, electromagnetic fields complies with the requirements of Table 4 of S-E-EVSE-01.
Test procedure in brief:

The error shift, compared to the intrinsic error at sinusoidal conditions, must be measured when the EVSE is subjected to electromagnetic RF fields. The electromagnetic field strength must be as specified by the severity level, and the field uniformity must be as defined by the standard referenced. The frequency ranges to be considered are swept with the modulated signal, pausing to adjust the RF signal level or to switch oscillators and antennas as necessary. Where the frequency range is swept incrementally, the step size must not exceed 1% of the preceding frequency value. The test time for a 1% frequency change must not be less than the time it takes to make a measurement and not less than 0.5 seconds.

The section of cable length exposed to the electromagnetic field must be 1 m.

The test must be performed with the generating antenna facing each side of the EVSE. When the EVSE can be used in different orientations (i.e. vertical or horizontal), all sides must be exposed to the fields during the test.

The carrier must be modulated with 80% AM at 1 kHz sine wave.

The EVSE must be separately tested at the manufacturer's specified clock frequencies.

Any other sensitive frequencies must also be analyzed separately.

Note: Usually these sensitive frequencies can be expected to be the frequencies emitted by the EVSE.

Test condition:
During the test, the EVSE must be energized with reference voltage and a current equal to 50%Imax. The measurement error of the EVSE must be monitored by comparison with a reference standard not exposed to the electromagnetic field or immune to the field, or by an equally suitable method. The error at each 1% incremental interval of the carrier frequency must be monitored and compared to the requirements of Table 4 of S-E-EVSE-01. When using a continuous frequency sweep, this can be accomplished by adjusting the ratio of the sweep time and the time of each measurement. When using incremental 1% frequency steps, this can be accomplished by adjusting the dwell time on each frequency to fit the measurement time.
Test severity:
80 MHz to 6000 MHz at a field strength of 10 V/m.
Acceptance criteria:
The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.
6.3.9.2 Immunity to Conducted Disturbances, Induced by Low Frequency Fields
Applicable standard:
IEC 61000-4-19 and where applicable IEC 61851-21-x
Object of the test:
To verify an EVSE's immunity against disturbing differential currents in the 2 kHz-150 kHz frequency range originating from power electronics and power line communication systems.
Test procedure in brief:

The test is performed with disturbances in the current only; the test with voltage disturbances is not required. The test must be carried out according to IEC 61000-4-19: 2014, at the following conditions:

  • The differential test current (Idiff) must be applied to the mains port:
    1. 2 kHz to 30 kHz: I diff = (2 ± 0.2) % Imax,
    2. 30 kHz to 150 kHz: I diff = (0.5 ± 0.1) % Imax.

The test waves profiles "CW (Continuous Wave) pulses with pause" and "rectangular modulated pulses" must be used (IEC 61000-4-19:2014, 5.2.2 and 5.2.3):

Tests must be performed at the following frequencies:
2 kHz, 3 kHz, 5 kHz, 7 kHz, 10 kHz, 15 kHz, 20 kHz, 30 kHz, 40 kHz, 50 kHz, 70 kHz, 85 kHz, 100 kHz, 120 kHz, 150 kHz
Test Conditions:
  • Voltage set to the lowest U nom
  • Current set to 50 % Imax
Acceptance criteria:
The error shift must not exceed that stated in Table 4.

6.3.9.3 Immunity to conducted disturbances, induced by radiofrequency fields

Applicable standard:
IEC 61000-4-6 and where applicable IEC 61851-21-x.
Object of the test:
To verify that the error shift due to conducted disturbances induced by RF fields complies with the requirements of Table 4 of S-E-EVSE-01.
Test procedure in brief:

A radiofrequency electromagnetic current to simulate the influence of electromagnetic fields must be coupled or injected into the power ports and I/O ports of the EVSE using coupling/decoupling devices as defined in the standard referenced. The performance of the test equipment consisting of an RF generator, (de)coupling devices, attenuators, etc. must be verified.

The EVSE must be tested as a tabletop instrument. During the test, the EVSE must be energized with reference voltage and a current equal to 50% I max. The error at each 1% incremental interval of the carrier frequency must be monitored and compared to the requirements of Table 4 of S-E-EVSE-01. When using a continuous frequency sweep, this can be accomplished by adjusting the ratio of the sweep time and the time of each measurement. When using incremental 1% frequency steps, this can be accomplished by adjusting the dwell time on each frequency to fit the measurement time.

If the EVSE is a polyphase EVSE, the tests must be performed at all extremities of the cable.

Test severity:
  • RF amplitude (50 Ω):10 V (e.m.f.).
  • Frequency range: 0.15 MHz to 80 MHz.
  • Modulation: 80 % AM, 1 kHz sine wave.
Acceptance criteria:
The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

6.3.10 Operation of ancillary devices

Object of the test:
To verify compliance with the provisions of Table 4 of S-E-EVSE-01 under conditions of operation of ancillary devices. The operation of ancillary devices must be tested to ensure that they do not affect the metrological performance of the EVSE.
Test procedure:
In this test, the EVSE must be operated at reference conditions and its error continuously monitored, while ancillary devices such as communication devices, relays and other I/O circuits are operated.
Allowed effects:
The functionality of the EVSE must not be impaired and the error shift due to the operation of the ancillary devices must always be less than the error shift limit specified in Table 4 of S-E-EVSE-01.
Mandatory test point:
50% I max at PF = 1.
Acceptance criteria:
The error shift must not exceed that stated in Table 4 of S-E-EVSE-01.

6.4 Tests for disturbances

6.4.1 General instructions for disturbance tests

These tests are designed to verify that the EVSE fulfils the requirements for the influence of disturbances as given by tables 5, 6, and 7 of S-E-EVSE-01. Tests are to be performed using one disturbance at a time; all other influence quantities must be set to reference conditions unless otherwise stated in the relevant test description. No significant fault must occur. Unless otherwise stated, each test must confirm by measurement that the EVSE still fulfils the base maximum permissible error requirements after the disturbance test.

Temporary loss of functionality is allowed as long as the EVSE returns to normal functionality automatically when the disturbance is removed.

The mandatory test point for the check of base maximum permissible error is 50% I max, PF = 1.

6.4.2 Electrostatic discharge

Applicable standard:
IEC 61000-4-2 and where applicable IEC 61851-21-x.
Object of the test:
To verify compliance with the requirements of 7.3.2.3 and Table 5 of S-E-EVSE-01 under conditions of direct and indirect electrostatic discharge.
Test procedure in brief:
An ESD generator must be used with performance characteristics specified in the referenced standard. Before starting the tests, the performance of the generator must be verified. At least 10 discharges, in the most sensitive polarity, must be applied. For EVSE not equipped with a ground terminal, the EVSE must be fully discharged between discharges. Contact discharge is the preferred test method. Air discharges must be used where contact discharge cannot be applied.
Direct application:
In the contact discharge mode to be carried out on conductive surfaces, the electrode must be in contact with the EVSE. In the air discharge mode on insulated surfaces, the electrode is approached to the EVSE and the discharge occurs by spark.
Indirect application:
The discharges are applied in the contact mode to coupling planes mounted in the vicinity of the EVSE.
Test #1:

A transaction must be performed at U nom and 50% I max for a sufficient quantity of energy to allow all of the discharges to be applied.

Apply the discharges during the transaction.

Allowed effects:
No significant fault must occur. If the transaction is interrupted by the discharges, it must be terminated without billing the customer.
Test #2:
After Test #1 is completed, a transaction must be performed at U nom and 50% I max for a delivery of at least the MMQ of energy.
Allowed effects:
An error shift larger than 1.0 BMPE must not occur.
Test severity:

Contact discharge voltage (1): 6 kV.

Air discharge voltage (2): 8 kV.

Note 1: Contact discharges must be applied on conductive surfaces.

Note 2: Air discharges must be applied on non-conductive surfaces.

6.4.3 Fast transients

Applicable standard:
IEC 61000-4-1, IEC 61000-4-4 and where applicable IEC 61851-21-x.
Object of the test:
To verify compliance with the requirements of 7.6.1.3 and Table 5 of S-E-EVSE-01 under conditions where electrical bursts are superimposed on voltage and current circuits, and I/O and communication ports.
Test procedure in brief:
A burst generator must be used with the performance characteristics specified in the referenced standard. The EVSE must be subjected to bursts of voltage spikes for which the repetition frequency of the impulses and peak values of the output voltage on 50 Ohm and 1000 Ohm loads are defined in the referenced standard. The characteristics of the generator must be verified before connecting the EVSE. Both positive and negative polarity bursts must be applied. The duration of the test must not be less than 1 min for each amplitude and polarity. A capacitive coupling clamp, as defined in the standard, must be used to couple to I/O and communication lines with a reference voltage over 40 V. The test pulses must be applied continuously during the measurement time.
Test conditions:

The EVSE voltage and auxiliary circuits must be energized with the reference voltage.

The cable length between the coupling device and the EVSE must be 1 m.

The test voltage must be applied in common mode (line-to-earth) to:

  1. the input power circuits;
  2. the auxiliary circuits, if separated from the voltage circuits in normal operation and with a reference voltage over 40 V.
Test severity:
  • Test voltage on the input power circuits: 2 kV.
  • Test voltage on auxiliary circuits with a reference voltage over 40 V: 1 kV.
Allowed effects:
As stated in 7.6.1.3 of S-E-EVSE-01.
Mandatory test points:
50% I max, PF = 1.

6.4.4 Voltage dips and interruptions

Applicable standard:
IEC 61000-4-11, IEC 61000-6-1, IEC 61000-6-2.
Object of the test:
To verify compliance with the requirements of 7.6.1.3 and Table 5 of S-E-EVSE-01 under conditions of short time mains voltage reductions (dips and interruptions).
Test procedure in brief:

A test generator that is able to reduce the amplitude of the AC mains voltage over an operator-defined period of time should be used in this test. The performance of the test generator must be verified before connecting the EVSE.

The mains voltage reductions must be repeated 10 times with an interval of at least 10 seconds.

Test conditions:
Voltage circuits energized with U nom without any current in the current circuits.
Test severities:
Table 5.1: Voltage dips
Test Test a Test b Test c
Reduction: to 30% U nom to 60% U nom to 60% U nom
Duration: 0.5 cycles 1 cycle 30 cycles (60 Hz)
Table 5.2: Voltage interruption test
Reduction: to 0% U nom
Duration: 300 cycles (60 Hz)
Allowed effect:
As stated in 7.6.1.3 of S-E-EVSE-01.

6.4.5 Surges on AC mains power lines

Applicable standards:
IEC 61000-4-5 and where applicable IEC 61851-21-x.
Object of the test:
To verify compliance with the requirements of 7.6.1.3 and Table 5 of S-E-EVSE-01 under conditions where electrical surges are superimposed on the mains voltage and, if applicable, on I/O and communication ports.
Test procedure in brief:

A surge generator must be used with the performance characteristics specified in the referenced standard. The test consists of exposure to surges for which the rise time, pulse width, peak values of the output voltage/current on high/low impedance load, and minimum time interval between two successive pulses are defined in the referenced standard.

The characteristics of the generator must be verified before connecting the EVSE.

Test conditions:

EVSE in operating condition:

  • Voltage circuits energized with nominal voltage.
  • Without any current in the current circuits and the current terminals must be open.
  • Cable length between surge generator and EVSE: 1 m.
  • Tested in differential mode (line to line).
  • Phase angle: pulses to be applied at 60° and 240° relative to zero crossing of AC supply.
Test severities:

Voltage circuits:

  • Line to line: Test voltage: 1.0 kV, generator source impedance: 2 Ω.
  • Line to earth:Footnote 3 Test voltage: 2.0 kV, generator source impedance: 2 Ω.
  • Number of tests: 5 positive and 5 negative.
  • Repetition rate: maximum 1/min.

Auxiliary circuits with a reference voltage over 40 V:

  • Line to line: Test voltage 1.0 kV, generator source impedance 42 Ω.
  • Line to earth:Footnote 3 Test voltage 2.0 kV, generator source impedance 42 Ω.
  • Number of tests: 5 positive and 5 negative.
  • Repetition rate: maximum 1/min.
Performance verification:
Accuracy test
Mandatory test point:
50% Imax
Allowed effects:
As stated in 7.6.1.3 of S-E-EVSE-01.

6.4.6 Short-time overcurrent

Object of the test:
To verify compliance with the requirements of 7.6.1.3 and Table 5 of S-E-EVSE-01 under conditions of a short time overcurrent.
Test procedure in brief:
The EVSE must be able to handle the current caused by a short-circuit within the electric vehicle.
Test current:

A current equivalent to 5· I max (+0 %, -10 %) limited to a maximum of 3 kA, for 0.5 cycle.

The test current must be applied to one phase at a time. The test current value given is the RMS value, not the peak value.

Allowed effects:
No damage must occur. With the voltage reconnected the EVSE must be allowed to return to normal temperatures (about one hour). The error shift, compared to the initial error before the test, must then be less than the limit of error shift given by Table 5.
Mandatory test points:
50% I max, PF = 1.
Allowed effects:
As stated in 7.6.1.3 of S-E-EVSE-01.

6.4.7 Impulse voltage

6.4.7.1 General
Object of the test:
To verify compliance with the requirements of 7.6.1.3 and Table 5 of S-E-EVSE-01 under conditions of impulse voltage.
General test procedure:

The EVSE and its incorporated ancillary devices, if any, must be such that they retain adequate dielectric qualities, taking account of the atmospheric influences and different voltages to which they are subjected under normal conditions of use.

The EVSE must withstand the impulse voltage test as specified below. The test must be carried out only on a complete EVSE.

For the purpose of this test, the term "earth" has the following meaning:

When the EVSE case is made of metal, the "earth" is the case itself, placed on a flat, conducting surface.

When the EVSE case or only part of it is made of insulating material, the "earth" is a conductive foil wrapped around the EVSE touching all accessible conductive parts and connected to the flat, conducting surface on which the EVSE is placed. The distances between the conductive foil and the terminals, and between the conductive foil and the holes for the conductors, must not be more than 2 cm.

During the impulse voltage test, the circuits that are not under test must be connected to the earth.

General test conditions:
  • Ambient temperature: 15°C to 25°C.
  • Relative humidity: 25% to 75%.
  • Atmospheric pressure: 86 kPa to 106 kPa.
Allowed effects:
As stated in 7.6.1.3 of S-E-EVSE-01.
6.4.7.2 Impulse voltage test procedure

Note: The selection of the source impedance is at the discretion of the testing laboratory.

For each test (see 6.4.7.3 and 6.4.7.4), the impulse voltage is applied ten times with one polarity and then repeated ten times with the other polarity. The minimum time between impulses must be 30 seconds.

Table 6: Impulse Voltage Test Levels
Voltage Phase to Earth Derived from Rated System Voltage ( U ) Rated Impulse Voltage ( U )
100 V ≤ U < 150 V 1 500 V
150 V ≤ U < 300 V 2 500 V
300 V ≤ U < 600 V 4 000 V
U ≥ 600 V 4 000 V
Applicable Standard:
IEC 60664-1 and where applicable IEC 61851-21-x.
Test conditions:
  • Impulse waveform: 1.2/50 µs impulse specified in IEC 60060-1.
  • Voltage rise time: ± 30%.
  • Voltage fall time: ± 20%.
  • Source energy: 10.0 J ± 1.0 J.
  • Test voltage: in accordance with Table 6.
  • Test voltage tolerance: +0 –10 %.

Note: Impulse voltage levels are set in accordance with IEC 60664-1:2020 Table F.1. overvoltage category II.

Allowed effects:
As stated in 7.6.1.3 of S-E-EVSE-01.
6.4.7.3 Impulse voltage tests for circuits and between circuits
Test procedure:

The test must be made independently on each circuit (or assembly of circuits) which is insulated from other circuits of the EVSE in normal use. The terminals of the circuits which are not subjected to impulse voltage must be connected to earth.

Thus, when the voltage and current circuits of a measuring element are connected together in normal use, the test must be made on the whole. The other end of the voltage circuit must be connected to earth and the impulse voltage must be applied between the terminal of the current circuit and earth. When several voltage circuits of a EVSE unit have a common point, this point must be connected to earth and the impulse voltage must be successively applied between each of the free ends of the connections (or the current circuit connected to it) and earth. The other end of this current circuit must be open.

When the voltage and current circuits of the same measuring element are separated and appropriately insulated in normal use (e.g. each circuit connected to measuring transformer), the test must be made separately on each circuit.

During the test of a current circuit, the terminals of the other circuits must be connected to earth and the impulse voltage must be applied between one of the terminals of the current circuit and earth. During the test of a voltage circuit, the terminals of the other circuits and one of the terminals of the voltage circuit under test must be connected to earth and the impulse voltage must be applied between the other terminal of the voltage circuit and earth.

The auxiliary circuits intended to be connected either directly to the mains or to the same voltage transformers as the EVSE circuits, and with a reference voltage over 40 V, must be subjected to the impulse voltage test by being tied together with a voltage circuit during tests. The other auxiliary circuits must not be tested.

Performance verification:
Accuracy test
Mandatory test point:
50% Imax
Allowed effects:
As stated in 7.6.1.3 of S-E-EVSE-01.
6.4.7.4 Impulse voltage test of electric circuits relative to earth
Test procedure:

All the terminals of the electric circuits of the EVSE, including those of the auxiliary circuits with a reference voltage over 40 V, must be connected together.

The auxiliary circuits with a reference voltage below or equal to 40 V must be connected to earth. The impulse voltage must be applied between all the electric circuits and earth.

Performance verification:
Accuracy test
Mandatory test point:
50% Imax
Allowed effects:
As stated in 7.6.1.3 of S-E-EVSE-01, during this test no flashover, disruptive discharge or puncture must occur.

6.5 Mechanical tests

All tests in 6.5 may be performed as a group with a single accuracy test before and after the group of tests. These tests may also be eliminated from type approval if in situ testing is performed prior to an EVSE being put into service.

6.5.1 Vibrations

Applicable standards:
IEC 60068-2-47, IEC 60068-2-64.
Object of the test:
To verify compliance with the provisions of 7.6.1.3 and Table 7 of S-E-EVSE-01 under conditions of vibrations.
Test procedure in brief:

The EVSE must, in turn, be tested in three, mutually perpendicular axes whilst mounted on a rigid fixture by its normal mounting means.

The EVSE must normally be mounted so that the gravitational force acts in the same direction as it would in normal use. Where the effect of gravitational force is not strong, the EVSE may be mounted in any position.

Test severity:
Table 6.1: Test severity
Total frequency range 10 Hz to 150 Hz
Total RMS level 7 m·s-2
Acceleration spectral density (ASD) level 10-20 Hz 1 m2·s-3
Acceleration spectral density (ASD) level 20-150 Hz -3 dB/octave
Duration per axis: At least 2 minutes.
Mandatory test points:
50% I max, PF = 1.
Allowed effects:
After the test, the function of the EVSE must not be impaired and the error shift, at 50% I max, must not exceed the limit of error shift listed in Table 7 of S-E-EVSE-01.

6.5.2 Shock

Applicable standard:
IEC 60068-2-27.
Object of the test:
To verify compliance with the provisions of 7.6.1.3 and Table 7 of S-E-EVSE-01 under conditions of shock.
Test procedure in brief:
The EVSE is subjected to non-repetitive shocks of standard pulse shapes with specified peak acceleration and duration. During the test, the EVSE must not be operational and it must be fastened to a fixture or to the shock-testing machine.
Test severity:
  • Pulse shape: Half-sine.
  • Peak acceleration: 30 gn.
  • Pulse duration: 18 ms.
Mandatory test points:
50 % I max, PF = 1.
Allowed effects:
After the test, the function of the EVSE must not be impaired and the error shift, at 50 % I max, must not exceed the limit of error shift listed in Table 7 of S-E-EVSE-01.

6.6. Environmental tests

Tests 6.6.1 through 6.6.7 comprise a suite of tests for immunity to various environmental disturbances. All tests are performed with the EVSE unpowered. Tests may be performed in any order and may be performed as a group with a single accuracy test before and after the group of tests.

6.6.1 Protection against solar radiation

Applicable standard:
ISO 4892-3.
The object of the test:
To verify compliance with the requirements of 7.6.1.3, 6.2.1, 7.3 and Table 6 of S-E-EVSE-01 regarding protection against solar radiation. For outdoor EVSE only.
Test conditions:
EVSE in non-operating condition.
Test apparatus:
  • Lamp type/wavelength: UVA 340.
  • Black panel thermometer.
  • Light meter.
  • Cycling rig with a condensation cycle to comply with the parameters in the test conditions.
Test conditions:
Table 6.2: EVSE in non-operating condition
Test Cycle
(12 h cycle)
Lamp Type Spectral Irradiance Black Panel Temperature
8 h dry UVA 340 0.76 W/m2/nm
at 340 nm
(60 ±3) °C
4 h condensation Light off (50 ±3) °C
Test procedure in brief:

Partially mask a section of the EVSE for later comparison. Expose the EVSE to artificial radiation and weathering in accordance with ISO 4892-3 for a period of 66 days (132 cycles) and in accordance with the test conditions above.

After the test, the EVSE must be visually inspected and a functional test must be performed. The appearance and, in particular, the legibility of markings and displays must not be altered. Any means of protection of the metrological properties, such as the case and sealing, must not be affected. The function of the EVSE must not be impaired.

Allowed effects:
After the test the EVSE must be visually inspected and a functional test must be performed. The appearance and, in particular, the legibility of markings and displays must not be altered. Any means of protection of the metrological properties, such as the case and sealing, must not be affected. The function of the EVSE must not be impaired.

6.6.2 Protection against ingress of dust

Applicable standards:
IEC 60529, IEC 61851-1.
The object of the test:
To verify compliance with the provisions of 7.6.1.3 and Table 6 of S-E-EVSE-01 regarding protection against the ingress of dust.
Test conditions:
  • Reference conditions.
  • IP 5x4 rating.
  • Category 2 enclosure.
Test procedure in brief:
After the test, the interior of the EVSE must be visually inspected and a functional test must be performed.
Allowed effects:
The talcum powder or other dust used in the test must not have accumulated in a quantity or location such that it could interfere with the correct operation of the equipment or impair safety. No dust must deposit where it could lead to tracking along the creepage distances. The function of the EVSE must not be impaired.

6.6.3 Extreme temperatures – Dry heat

Applicable standards:
IEC 60068-2-2, IEC 60068-3-1.
Object of the test:
To verify compliance with the provisions of 7.6.1.3 and Table 6 of S-E-EVSE-01 under conditions of dry heat.
Test procedure in brief:

The test consists of exposure to the specified high temperature under "free air" conditions for two hours (starting when the temperature of the EVSE is stable), with the EVSE in a non-operating state.

The change of temperature must not exceed 1 °C/min during heating up and cooling down.

The absolute humidity of the test atmosphere must not exceed 20 g/m3.

Test severity:

The test must be performed at a standard temperature one step higher than the upper temperature limit specified for the EVSE.

Possible temperatures: 40°C, 55°C, 70°C, 85°C.

Allowed effects:
After the test, the function of the EVSE must not be impaired and the error shift must not exceed the limit of error shift listed in Table 6 of S-E-EVSE-01.
Mandatory test points:
50% I max, PF = 1.

6.6.4 Extreme temperatures – Cold

Applicable standards:
IEC 60068-2-1, IEC 60068-3-1.
Object of the test:
To verify compliance with the provisions of 7.6.1.3 and Table 5 of S-E-EVSE-01 under conditions of low temperatures.
Test procedure in brief:

The test consists of exposure to the specified low temperature under "free air" conditions for two hours (starting when the temperature of the EVSE is stable), with the EVSE in a non-operating state.

The change of temperature must not exceed 1°C/min during heating up and cooling down.

Test severity:
The test must be performed at a standard temperature one step lower than the lower temperature limit specified for the EVSE.
Possible temperatures:
-10°C, -25°C, -40°C, -55°C (1).
Allowed effects:
After the test, the function of the EVSE must not be impaired and the error shift must not exceed the limit of error shift listed in Table 6 of S-E-EVSE-01.
Mandatory test points:
50% I max, PF = 1.

Note 1: If the specified lower temperature limit is -55ºC, then this test must be performed at -55ºC.

6.6.5 Damp heat, steady-state (non-condensing), for humidity class H1

Applicable standards:
IEC 60068-2-78, IEC 60068-3-4.
Object of the test:
To verify compliance with the provisions in 7.6.1.3 and Table 6 of S-E-EVSE-01 under conditions of high humidity and constant temperature. For EVSE that are specified for enclosed locations where the EVSE are not subjected to condensed water, precipitation, or ice formations (H1).
Test procedure in brief:
The test consists of exposure to the specified high level temperature and the specified constant relative humidity for a certain fixed time defined by the severity level. The EVSE must be handled such that no condensation of water occurs on it.
Test conditions:
Voltage and auxiliary circuits energized with reference voltage without any current in the current circuits.
Test severity:
  • Temperature: 30°C.
  • Humidity: 85%.
  • Duration: Two days.
Allowed effects:

During the test, no significant fault must occur. Immediately after the test, the EVSE must operate correctly and comply with the accuracy requirements of Table 6 of S-E-EVSE-01.

24 hours after the test, the EVSE must be subjected to a functional test, during which it must operate correctly. There must not be any evidence of any mechanical damage or corrosion which may affect the functional properties of the EVSE.

6.6.6 Damp heat, cyclic (condensing) for humidity classes H2 and H3

Applicable standards:
IEC 60068-2-30, IEC 60068-3-4.
Object of the test:
To verify compliance with the requirements in 7.6.1.3 and Table 6 of S-E-EVSE-01 under conditions of high humidity and temperature variations. This test applies to EVSE with a humidity class specification either for enclosed locations where EVSE can be subjected to condensed water or for open locations (humidity classes H2 and H3).
Test procedure in brief:

The test consists of exposure to cyclic temperature variation between 25 °C and the temperature specified as the upper temperature according to the test severities below, whilst maintaining the relative humidity above 95 % during the temperature change and low temperature phases, and at 93 % during the upper temperature phases. Condensation should occur on the EVSE during the temperature rise.

The 24 hour-cycle consists of:

  1. Temperature rise over three hours.
  2. Temperature maintained at upper value until 12 hours from the start of the cycle.
  3. Temperature reduced to lower value within three to six hours, the rate of fall during the first hour and a half being such that the lower value would be reached in three hours.
  4. Temperature maintained at lower value until the 24-hour cycle is completed.

The stabilizing period before and recovery after the cyclic exposure must be such that all parts of the EVSE are within 3°C of their final temperature.

Test conditions:

Voltage and auxiliary circuits energized with reference voltage without any current in the current circuits.

Mounting position according to manufacturer's specification.

Test severities:

EVSE with a humidity class specification for enclosed locations where EVSE can be subjected to condensed water must be tested at severity level 1. EVSE with a humidity class specification for open locations must be tested at severity level 2.

Table 6.3: Test severities
Specified Humidity Class: H2 H3
Severity levels: 1 2
Upper temperature (°C): 40 55
Duration (cycles): 2 2
Allowed effects:

No significant fault must occur during the test.

Immediately after the test, the EVSE must operate correctly and comply with the accuracy requirements of Table 4 of S-E-EVSE-01.

24 hours after the test, the EVSE must be subjected to a functional test, during which it must operate correctly. There must be no evidence of any mechanical damage or corrosion which may affect the functional properties of the EVSE.

6.6.7 Water test

Applicable standards:
IEC 60068-2-18, IEC 60512-14-7, IEC 60529.
Object of the test:
To verify compliance with the requirements in 7.6.1.3 and Table 6 of S-E-EVSE-01 under conditions of rain and water splashes. The test is applicable to EVSE that are specified for open locations (H3).
Test procedure in brief:
The EVSE is mounted on an appropriate fixture and is subjected to impacting water generated from either an oscillating tube or a spray nozzle used to simulate spraying or splashing water.
Test conditions:
  • The EVSE must be in functional mode during the test.
  • Flow rate (per nozzle): 0.07 L/min.
  • Duration: 10 minutes.
  • Angle of inclination: 0° and 180°.
Allowed effects:

No significant fault must occur during the test.

Immediately after the test, the EVSE must operate correctly and comply with the accuracy requirements of Table 6 of S-E-EVSE-01.

24 hours after the test, the EVSE must be subjected to a functional test, during which it must operate correctly and comply with the accuracy requirements of Table 2 of S-E-EVSE-01. There must not be any evidence of any mechanical damage or corrosion which may affect the functional properties of the EVSE.

6.6.8 Durability test

Object of the test:
To verify compliance with the provisions in 7.6.1.3 and Table 6 of S-E-EVSE-01 for durability.
Test procedure in brief:
The test procedure for durability must subject a number of pieces of EVSE to the conditions below. The EVSE accuracy must be determined prior to and after the durability test.
Test conditions:
  • A minimum of one EVSE.
  • Test temperature: maximum operating temperature specified by the manufacturer
  • Test voltage: reference voltage.
  • Test load: 50% I max.
  • Test sequence: application of the load for 8 hours followed by 16 hours without any current
  • Test duration: 10 cycles of the test sequence.
Mandatory test points:
For initial and final measurement, the voltage must be the reference voltage, with the following test points: I tr and 50% I max at PF = 1.

Footnotes

Footnote 1

Tests may be performed at other temperatures if the results are corrected to the reference temperature by applying the temperature coefficient established in the type tests and provided an appropriate uncertainty analysis is carried out.

Return to footnote 1 referrer

Footnote 2

The requirement applies to both phase-to-phase and phase-neutral for poly-phase EVSE.

Return to footnote 2 referrer

Footnote 3

For cases where the earth of the EVSE is separate to neutral.

Return to footnote 3 referrer