Maintenance
PRS-7367 343
12 Maintenance
12.1 Maintenance General
A strict and detailed laboratory test is carried out in the development and design of the relay device.
All the relay devices are strictly tested according to national or international standards.
The relay device has powerful real-time self-check capability. However, during the long time
running of the relay device, there is no real time supervision for the input terminals and output
circuits. Therefore, some periodic tests should be done to ensure that the relay is functioning
correctly and the external wiring is intact.
The maintenance of the relay device mainly includes the following two conditions:
Regular testing;
Failure maintenance
12.2 Regular Testing
Regular testing is to test the normal relay devices in a certain period of time, so as to find potential
defects or failures and eliminate hidden dangers to ensure the healthy operation of the devices.
The regular testing cycle depends on a number of factors, such as the environment conditions, the
complexity, etc. Advices of CYG are as the following:
The relay device must be tested for the first time in the first year of operation, mainly including
protection logic, AC circuit, tripping circuit and power supply circuit.
A partial test should be carried out every 3 years, mainly including the inspection of the AC
circuit and the tripping circuit.
An overall test should be carried out every 6 years, mainly including the protection function
logic, the AC circuit, the tripping and closing circuit, the power supply circuit.
12.3 Failure Maintenance
Failure maintenance refers to the maintenance of a faulty relay device.
12.3.1 Hardware Failure
1) Check whether the hardware is in trouble or not according to the device alarm signal.
2) visual check of the device
Check whether the device has obvious physical fault
If you can find a clear physical fault point of the device, please contact CYG for repair or
replacement
3) Confirm the scope of the fault
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