Overhauling Cables Between Stss (Dvc) - Huawei JUPITER-3000K-H1 Smart User Manual

JUPITER-(3000K, 6000K, 9000K)-H1 Smart
Transformer Station
User Manual
Figure 6-7 Status of the switches before overhaul
Procedure
Step 1 Cut off the STS loads at site 3 and turn off circuit breaker 56035 at site 3.
Step 2 Cut off the STS loads at site 2 and turn off circuit breaker 56025 at site 2.
Step 3 Turn off load switch 57011 of cabinet G3 at site 1. After the electric display of
cabinet G3 does not blink, turn on grounding switch 57017 of cabinet G3 (pull out
the mechanical interlock key to grounding switches 57017 and 50027). Install a
sign to forbid any operation.
Step 4 Turn off load switch 50021 of cabinet G1 at site 2. (Insert the mechanical interlock
key to grounding switches 57017 and 50027.) Turn on grounding switch 50027 of
cabinet G1. Install a sign to forbid any operation.
Step 5 Both ends of the cables between site 1 and site 2 are grounded, safety measures
are taken, and the cable compartment doors at both ends are unlocked.
Figure 6-8 Status of the switches during overhaul
----End

6.4 Overhauling Cables Between STSs (DVC)

Issue 02 (2023-09-30)
NO TE
● For DVC ring main units, the cable overhaul procedures for CGM and DQS are the same.
● This document uses the CGM DVC ring main unit (cables between site 1 and site 2) as
an example.
Copyright © Huawei Technologies Co., Ltd.
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