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1. Test functions introduction
(1) time relay
①
Action time test
Applied rated DC voltage (typically 220V) to the coil of the, the action contacts of delay
access tester open intake, set UA = 110V, UB = -110V, UAB line voltage access relay voltage
coil, use [manual test ( stop action ) ] output can measure action time of the time relay .
②
Operation voltage and return voltage test
Use single-phase voltage can finish the test. Set UA = 50V, select the UA variable ,
voltage step 1V, the instantaneous action contacts of the relay access tester binary inputs,
[ automatic test action returns ] mode test , program automatic test action voltage and return
voltage , and calculate the return coefficient . Normal operation voltage is 110V, the return
voltage about 30V.
(2) Intermediate relay
Select a phase voltage or current to be variable according the relay type, manually or
automatic test. The device has a special test program for intermediate relay; refer to the
[intermediate relay] module.
(3) Signal relay
Due to the small operating current of signal relay, only a few dozen mA, the inherent DC
offset may cause relay action, it cannot measure the operating current of the relay. We
usually use the method of applying a DC voltage, the operating current calculated: the
measured voltage value divided by the DC resistance of the relay coil. Such as : the voltage
UA manually incremental from 0V by step 0.2V , until reached 4V, the relay acts , set the relay
coil DC resistance to be 150 ohms ( can read out from the relay coil or measured by multi
meter) , the relay operating current = 4/150 = 26.67mA.
(4) Wiring - as shown :
Содержание HT-802
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