21
† For supply voltages above 200 V only.
Trip Testing (measuring the trip time)
1. Select the RCD rated current on the rotary switch.
2. Connect to the supply as detailed below.
3. Select the required test using the
I key - 0˚ or 180˚ for the
normal trip tests, or
5I together with 0˚ or 180˚ for a 5I
test.
4. Select the
RCD type using the TYPE key.
5. Press the
TEST button.
If the RCD trips, the first display depends upon the Setting
selected.
Setting A: The contact or fault voltage is displayed with
the Loop or earth resistance and trip time available by pressing
the
DISPLAY key. Setting b: The trip time is displayed with the
contact/fault voltage and Loop/earth resistance available by
pressing the DISPLAY key.
150 mA 40 ms test
When an RCD is fitted for personal protection, a test current of
150 mA must cause the RCD to trip in less than 40 ms.
1. Select the 150 mA 40 ms rotary switch.
2. Connect to the supply as detailed below.
3. Select and set the Trip Test to 0˚ or 180˚ using the
I key.
4. Press the
TEST key.
If the RCD trips within 40 ms, the trip time is displayed.
Ramp Test (measuring the trip current)
The trip current is measured by applying a test current of half the
rated trip current and increasing this every 200 ms. When the
supply is cut, the current flowing is recorded and displayed.
A low trip current could be due to an overly sensitive RCD, or to
leakage currents in the supply.
To determine the trip current of an RCD.
1. Select an appropriate RCD rated current on the rotary
switch.
RCD rating
D.C. sensitive
RMS currents
10mA 14,1 mA
30mA 42,4 mA
100mA 141 mA
300mA 424 mA
†
500mA Not available
1000mA Not available
RCD rating Current Range Step Value
10mA 5..15mA 1 mA
30mA 15..50mA 1 mA
100mA 50..150mA 2 mA
300mA 150..300mA 6 mA
500mA 250..500mA 10 mA
1000mA 500..1040mA 52 mA
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