The BTK-110kV/220kV transformer neutral point accessory combination mainly includes the following related equipment: neutral point disconnect switch, discharge gap, zinc oxide lightning arrester, and current transformer for measuring discharge current. To ensure an aesthetically pleasing and convenient equipment arrangement, a separate T-shaped or portal-shaped bracket can be designed based on the user's equipment selection, integrating the neutral point disconnect switch, discharge gap, lightning arrester, and other neutral point accessory equipment into a single unit that facilitates on-site construction and installation. This transformer neutral point accessory combination equipment provides protection against lightning overvoltage, switching overvoltage, and temporary overvoltage at the transformer neutral point.
1/1
Neutral Point Complete Protection Device BTK-110/220
Negotiable
China
Longtan South Road, High-tech Development Zone, Tai'an City, Shandong Province
+86-05388932528
tkpower@taikai-power.com
Product Introduction
Product Parameters
|
Product Model |
BTK-110 |
BTK-220 |
|
|
Rated voltage of transformer |
126 |
252 |
|
|
Transformer neutral point withstand voltage |
8/20μs lightning impulse withstand voltage KV (peak value) |
250 |
400 |
|
1min power frequency withstand voltage KV (effective value) |
95 |
200 |
|
|
Isolating switch |
Model |
GW13-72.5GW8-72.5 |
GW13-126GW8-126 |
|
Rated current A |
630 |
||
|
Main loop resistance μΩ |
400 |
450 |
|
|
Insulation distance of fracture after opening of isolating switch mm |
≥ 650 |
≥ 1000 |
|
|
Operating mechanism |
CS17A hand force mechanism or CJTKB electric mechanism |
||
|
Zinc Oxide Arrester |
Model |
YH1.5W-72/186 |
YH1.5W-144/320 |
|
Rated voltage KV (effective value) |
72 |
144 |
|
|
Continuous operating voltage KV (effective value) |
58 |
116 |
|
|
8/20μs lightning impulse current residual voltage is not more than KV |
186 |
320 |
|
|
DC 1mA reference voltage not less than KV |
105 |
205 |
|
|
2ms square wave flow capacity A |
400 |
||
|
Discharge Gap |
Type |
Rod gap, spherical electrode |
|
|
Power frequency dry discharge voltage ± 10% KV |
83 |
164 |
|
|
Distance range of gap electrode mm |
90~135 |
250~320 |
|
|
Current transformer |
Model |
LMZW-10 |
|
|
Transformation ratio |
100/5, 200/5, 300/5, 400/5, 500/5, 600/5 |
||
|
Secondary protection level |
5P/10, 10P/10, 10P/20 |
||
|
Capacity |
10VA, 20VA, 30VA |
||
|
Weight |
Not greater than kg |
300 |
400 |
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