Powering On The Ring Main Unit In The Mv Room; Status Check Before Power-On - Huawei JUPITER-3000K-H1 Smart User Manual

JUPITER-(3000K, 6000K, 9000K)-H1 Smart
Transformer Station
User Manual

4.2 Powering On the Ring Main Unit in the MV Room

4.2.1 Status Check Before Power-On

Ring Main Units in CVC/CCV Mode (DQS Series and 8DJH Series)
Step 1 Check the status of STS 1, STS 2, and STS 3.
1.
2.
3.
Step 2 Check Sub-Station Line 1, turn on the earthing switch, turn off the disconnector,
and turn off the circuit breaker.
Figure 4-3 Networking diagram of ring main units in CVC mode (DQS series)
Issue 02 (2023-09-30)
NO TE
● The cable connection mode and interlocking configuration of the ring main unit vary
with projects.
● The layouts of cabinets and switches vary with ring main unit suppliers.
● The combination modes of STSs vary with projects. This document uses three STSs as an
example.
NO TE
Before checking the switch status of the ring main unit, check the protection function of the
relay of the ring main unit. Go to the parameter setting interface of the relay according to
the factory setting table. Check that the protection function is enabled and Protection
parameter is properly set.
Check cabinet G1, turn on the earthing switch, turn off the load switch, open
the cable room door, check the cable connections and sealing, and then close
the cable room door.
Check cabinet G2, turn on the earthing switch, turn off the disconnector, turn
off the circuit breaker, open the cable room door, check the cable connections,
lightning arrester, and cable sealing, and then close the cable room door.
Check cabinet G3, turn on the earthing switch, turn off the load switch, open
the cable room door, check the cable connections and sealing, and then close
the cable room door.
Copyright © Huawei Technologies Co., Ltd.
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