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6
3. Verify station maximum preset charge current using CP terminals and
a meter with duty cycle function or an oscilloscope.
4. Simulate the error states as described in the SAE J1772 standard: CP
Error “E”, GFCI trip test, and Grounding Error.
Additional advanced tests such as Insulation Resistance, Power Quality,
Analysis of the Control Pilot waveform, and Loop Impedance can also be
done using the adapter in conjunction with appropriate test and measurement
equipment. The adapter is compatible with Fluke and Amprobe test and
measurement instrumentation.
Grounding protection Pre-Test
The Grounding
J
Pre-Test safety feature allows the operator to test the
PE conductor for possible presence of dangerous voltage against earth. In
normal circumstances, the grounding conductor is connected to earth and
therefore has no voltage against earth. However, if the grounding conductor
is not connected to earth (for example, connected to phase by mistake or the
grounding wire is disconnected or broken) the situation may be hazardous.
Operator skin contact is required on the PE PRE-TEST button (do not wear
gloves) as well as a suitable operator reference to a known earth ground
(through the operator's shoes etc.) Do not touch any metal parts of the
charging station while performing this test. In case of improper connection to
earth (for example, isolated placement of your body) this indication may be
not reliable.
WX Warning
The PE Pre-Test detects the presence of hazardous voltage on
Protective Earth but may not detect an open Protective Earth.
Test procedure:
1. Connect the test adapter to the charging station.
2. Touch the probe with a bare nger. If PE Light (item
2
, Figure 2) is
illuminated, then dangerous voltage is present at ground conductor.
Stop further testing immediately and check for a possible wiring fault of
the tested ground conductor. In case of this error, the ground terminal
carries hazardous voltage. There is a high risk of electric shock.
Possible errors are:
• PE interrupted / not connected
• PE carries voltage (for example, connected to phase)
Verifying charging voltage - vehicle simulation
Use the CP State rotary switch selector, to simulate various vehicle states
when the test adapter is connected to the charging station. Vehicle states
are simulated with dierent resistances connected between CP and PE
conductors. Correlation between resistance and vehicle states is shown in
Table 2 below.
Marking
of Vehicle
State
Electric Vehicle (EV)
State
Resistance
between CP
and PE
Voltage at
CP terminal
A EV not connected
Open (
∞
)
±12 V
1 kHz
B
EV connected, not ready
to charge
2.74 kΩ
+9 V / -12 V
1 kHz
C
EV connected, ventilation
not required, ready to
charge
882 Ω
+6 V / -12 V
1 kHz
D
EV connected, ventilation
required, ready to charge
246 Ω
+3 V / -12 V
1 kHz
Table 2. Correlation between resistance, vehicle state and CP voltage signal.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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