28
TB XRN2 02.00 E
7.4
Secondary injection test
7.4.1
Test equipment
•
Voltmeter and frequency meter with class 1 or better
•
Auxiliary power supply with the voltage correspond-
ing to the rated data on the type plate
•
Three-phase voltage supply unit with frequency regu-
lation (Voltage: adjustable from 0 to
≥
2 x U
N
; Fre-
quency: adjustable from 40 - 70 Hz)
•
Timer to measure the operating time (Accuracy class
±
10 ms)
•
Switching device
•
Test leads and tools
7.4.2
Example of test circuit
For testing of the
XRN2
relay, a three phase voltage
source with adjustable voltage and frequency is re-
quired. Figure 7.1 shows an example of a three-phase
test circuit energizing the
XRN2
relay during test. The
three phase voltages are applied to the relay in
Y-connection.
Fig. 7.1: Test circuit
For testing the vector surge function of the relay, a test
circuit which can produce phase angle change (vector
surge) is required to simulate mains failures (please re-
fer to chapter 7.4.8).
For testing the df/dt function of the relay, a special test
equipment is required, which produces a constant rate
of change of frequency.
Summary of Contents for XRN2
Page 1: ...XRN2 Mains decoupling relay ...
Page 40: ...40 TB XRN2 02 00 E ...
