Huawei Smartkits V100R002C00 User manual
Smartkits
V100R002C00
Guide to Transformer Low Voltage
Bushing Replacement (No
Handhole Replacement)
Issue 01
Date 2021-11-22
HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Copyright © Huawei Digital Power Technologies Co., Ltd. 2021. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Digital Power Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are the property of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei
Digital Power Technologies Co., Ltd. and the customer. All or part of the products, services and features
described in this document may not be within the purchase scope or the usage scope. Unless otherwise
specied in the contract, all statements, information, and recommendations in this document are
provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every eort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Digital Power Technologies Co., Ltd.
Address: Huawei Digital Power Antuoshan Headquarters Futian,Shenzhen 518043 People's
Republic of China
Website: https://e.huawei.com
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
i
Contents
1 Overview....................................................................................................................................1
2 Tool Introduction..................................................................................................................... 2
3 Replacement Procedure......................................................................................................... 7
3.1 Cut o the power supply of STS........................................................................................................................................ 7
3.2 Replacement Procedure........................................................................................................................................................ 7
3.3 Restore the power supply of STS.....................................................................................................................................36
3.4 Observe the STS repair....................................................................................................................................................... 36
Smartkits
Guide to Transformer Low Voltage Bushing
Replacement (No Handhole Replacement) Contents
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
ii
1 Overview
The low-voltage bushing is located on the side of the transformer body and is
used to connect the cabinet busbar to the low voltage transformer coil.If the low-
voltage bushing or sealing gasket is damaged，it may cause discharge or oil
leakage，and need to replace the lowlow-voltage bushing or gasket.
Low-voltage bushing has the following 2 structures:
Smartkits
Guide to Transformer Low Voltage Bushing
Replacement (No Handhole Replacement) 1 Overview
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
1
2 Tool Introduction
Major equipment and spare parts will be obtained from China by mail.
CA UTION
Perform the repair operation only after the spare parts and tools are ready.
No. Materi
al
picture Remarks
1 oil
storage
bag
Quantity: 1
Capacity: 2000L
Inner diameter of matching
tubing: 25 mm
Oil lling port position: middle
of the top
Valves: with
Flange sealing cap: with
2 oil
pump
Quantity: 1
Voltage: 12 V
Power: ≥ 500 W
Inner diameter of matching
tubing: 25 mm
Smartkits
Guide to Transformer Low Voltage Bushing
Replacement (No Handhole Replacement) 2 Tool Introduction
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
2
No. Materi
al
picture Remarks
3 blower Quantity: 1
Voltage: 12 V (or manual)
Hose Size: Match Breathing
Tube
4 Waterp
roof
pad
Quantity: 1
Dimension: 2 x 2 m
5 Tube Quantity: 2
Inner diameter: 25 mm
Length 1: 2 m x 1
Length 2: 4 m x 1
6 Flange Quantity: 2
Inner diameter of matching
tube: 25 mm
Outer diameter 1: matching
top drain valve
Outer diameter 2: matching
bottom drain valve
Smartkits
Guide to Transformer Low Voltage Bushing
Replacement (No Handhole Replacement) 2 Tool Introduction
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
3
No. Materi
al
picture Remarks
7 support
rod
Quantity: 8 sets
Length: 35 cm
Nut: M12*2
Flat washer: M8*2
8 ratchet
wrench
Quantity: 2 sets
Socket: M18*2
9 spanne
r
Quantity: 2
Size: M18
10 Adjusta
-ble
wrench
Quantity: 1
Hole opening range: > 30 mm
11 Hold
hoop
Quantity: 8
Size: matching inner diameter
25 mm casing
12 raw
materi
al belt
Obtained locally (not available
by air)
Smartkits
Guide to Transformer Low Voltage Bushing
Replacement (No Handhole Replacement) 2 Tool Introduction
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
4
No. Materi
al
picture Remarks
13 Step
ladder
Locally obtained (the volume
is too large)
14 grease Obtained locally (not available
by air)
15 Battery Obtained locally (not available
by air, car batteries are
available)
16 cleanin
g cloth
Obtained locally
(consumables)
17 buckets Locally obtained
Smartkits
Guide to Transformer Low Voltage Bushing
Replacement (No Handhole Replacement) 2 Tool Introduction
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
5
No. Materi
al
picture Remarks
18 Low-
voltage
bushin
g
Quantity: on demand
Smartkits
Guide to Transformer Low Voltage Bushing
Replacement (No Handhole Replacement) 2 Tool Introduction
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
6
3 Replacement Procedure
CA UTION
The low-voltage bushing shall be replaced in clear and windless weather to avoid
wind, sand or rain pollution of transformer oil.
NO TE
After all the materials are ready, repair the equipment.
3.1 Cut o the power supply of STS
3.2 Replacement procedure
3.3 Restore the power supply of STS
3.4 Observe the STS repair
3.1 Cut o the power supply of STS
Step 1 Switch o G2 cabinet circuit breaker, switch o G2 cabinet isolation switch and
switch on G2 cabinet earthing switch.
Step 2 Switch o the ACB of low-voltage cabinets LVA and LVB.
----End
3.2 Replacement Procedure
Step 1 Connect the oil storage bag, oil pump and ange with oil pipe, and x the oil pipe
with throat hoop.
Smartkits
Guide to Transformer Low Voltage Bushing
Replacement (No Handhole Replacement) 3 Replacement Procedure
Issue 01 (2021-11-22) Copyright © Huawei Digital Power Technologies Co.,
Ltd.
7
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