Table of Contents
Advertisement
JUPITER-(3000K, 6000K, 9000K)-H1 Smart
Transformer Station
User Manual
4.1.2.1 Insulation Test on the Transformer MV Side and the Ring Main Unit
Step 1 Adjust the switch of the ring main unit to be consistent with that in the test
schematic diagram.
Step 2 Use a temporary ground cable to ground phase A, B, or C of LV PANEL A and LV
PANEL B.
Step 3 Turn off the load switch in cabinet G1 or G3, turn on the grounding switch, and
open the door of the cable room.
Step 4 Route the cable of the insulation resistance tester into the cable room from the
bottom of cabinet G1 or G3. Connect the positive pole to the bushing and the
negative pole to the ground.
Step 5 Close the door of the cable room, turn off the grounding switch, turn on the load
switch, and perform the test.
Step 6 Maintain the test voltage of the insulation resistance tester at 2500 V for 1
minute. Record the insulation resistance at 10s, 30s, and 60s, respectively. The
insulation resistance must be greater than 100 MΩ.
Issue 02 (2023-09-30)
NO TE
● Perform insulation tests on the transformer MV side and the ring main unit before
connecting incoming cables and sealing cable holes.
● Before the insulation tests, ensure that no lightning arrester is installed in cabinet G2
because high voltage may damage the lightning arrester during the test.
● During insulation tests on the MV side and the ring main unit, ensure that the
grounding switch of the ring main unit is turned off, and that the load switch and
disconnector are turned on.
● The methods for performing the insulation test on the CVC/CCV/DVC/DCV ring main
units are the same.
● This document uses the CVC ring main unit as an example.
Copyright © Huawei Technologies Co., Ltd.
4 Power-On
63
Advertisement
Table of Contents
