Mv Room - Huawei STS-6000K-H1 Installation Manual

STS-6000K-H1 Smart Transformer Station (Vietnam,
Duc Long Gai Lai)
Installation Guide
No. Item
5 Pressure relief valve
6 Off-load tap
changer
7 Oil inlet and outlet
valve of the oil
cabinet
8 Dehydrating
breather

2.2.4 MV Room

Issue 02 (2020-02-21)
Function
Releases pressure.
Regulates the voltage.
Refills or drains oil.
-
No cable connector is installed in cabinet G1 or G3. The cable connectors in the figure are for reference
only.
Copyright © Huawei Technologies Co., Ltd.
Description
levels.
If a transformer is faulty, a large amount of gas is
generated, and the pressure of the insulation oil
increases sharply. When the certain threshold is
reached, the transformer oil is discharged and the
internal pressure of the transformer decreases to a
normal value. At the same time, a signal is sent to
trip the circuit breaker in the ring main unit.
There are five levels. Level 1 indicates the
maximum tapping value, level 3 indicates the
rated tapping value, and level 5 indicates the
minimum tapping value.

Oil refilling: Refill the transformer oil using
an uncontaminated metal or non-rubber hose
and oil injection equipment. (Note: Prevent air
from entering.)

Oil draining: Lead the transformer oil to a
container using an uncontaminated metal or
non-rubber hose.
The insulation oil in the conservator is connected
to the atmosphere through a dehydrating breather
with silica gel to absorb moisture and impurities
in the air and maintain the performance of the
insulation oil.
2 Product Overview
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