Publication 700-AT001A-EN-E June 2002
Q & A
4-17
The 700-SCZY, -SCTY, -SCTN, and SCZN SSR does not incorporate a
varistor. These SSRs with 200V AC output withstand a maximum of
264V AC. The output triac of the SSR in actual operation will be
destroyed due to an overvoltage of approximately 600V AC, provided
that the AC is a sine wave current with no distortion or noise.
For an ordinary power supply, there will be an increase in the failure
rate of the SSR if the load voltage exceeds 264V AC.
Is It Possible to Replace a
Defective Part in a SSR?
No parts of any SSR are replaceable because the SSR is sealed with
plastic resin.
How Can We Use a
Multimeter to Check If the
SSR is ON or OFF?
The resistance of the load terminals of the SSR does not make clear
changes when the input turns ON and OFF.
Connect a dummy load to the output terminals and check the voltage
of the load terminals with the input ON and OFF. The output voltage
will be close to the load power supply voltage with the SSR turned
OFF. The voltage will drop to approximately 1 V with the SSR turned
ON. This is more clearly checked if the dummy load is a lamp with an
output of about 100 W.
/RDG
