Seg MRF3, Руководство пользователя

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24 TB MRF3 04.01 E
6.4 Secondary injection test
6.4.1 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
•
AC voltage supply with frequency regulation (Volt-
age: adjustable from 0 to
≥
2 x U
N
;
Frequency: adjustable from 40 - 70 Hz)
•
Timer to measure the operating time
(Accuracy class
±
10 ms)
•
Switching device
•
Test leads and tools
6.4.2 Test circuit
For testing MRF3 the connection of a voltage source
with adjustable frequency is required. Fig. 6.1 shows
a simple example of a test circuit. For checking the
df/dt function a voltage source is needed which can
generate a constant rate of change of frequency.
Figure 6.1: Test circuit
MRF3