System Manual
15
Figure
Name
Description
Oil filling valve
when oil level of the MV transformer oil
tank is low, open the valve for oil filling.
Gas relay*
When a fault occurs in the transformer,
the oil in the oil tank will be decomposed
to generate gas, and the gas will rise
and enter the gas relay.
In case the gas generated is light, the
alarm signal contact will be
connected, and alarm signal will be
sent out.
In case the gas generated is heavy,
the tripping signal contact will be
connected, and the circuit breaker in
the switchgear trips, so that the
transformer will be disconnected from
the grid to avoid device damage.
Note: * is optional.
Note: Parameters marked with a) and b) are factory default values and can be adjusted
according to actual condition.
Communication Box
The exterior appearance and internal components of the combiner box are shown in figure
below.
A
No.
Description
A
Ethernet switch
