BC-BJB Transformer neutral point gap protection deviceDetailed product description：

The BC-BJB transformer neutral point gap protection device is specifically designed for the neutral points of 110KV, 220KV, and 330KV power transformers to achieve two different operating modes: grounded or ungrounded operation of the transformer neutral point.

Technical specifications
The technical data of BC-BJB type neutral grounding protection device is shown in the following table:

Product Model

Transformer rating Constant voltage Kv

Neutral point withstand voltage of transformer

disconnecting switch

Zinc oxide lightning arrester

discharge gap

current transformer

Lightning full wave and cutoff withstand voltage kV (Peak value)

1-minute power frequency kV (Effective value)

rated current A

Operation institution

rated voltage kV (Effective value)

Continuous operation Line voltage kV (Effective value)

Continuous operation Line voltage kV (Effective value)

8/20 μ s lightning Residual impulse current Voltage kV (Peak value)

Power frequency discharge Voltage kV ±10% (Effective value)

type

transformation ratio

BC-BJB-110

one hundred and ten

two hundred and fifty

ninety-five

four hundred

CS8-5 (Hand) Dynamic or CJ6 (Electric)

seventy-two

fifty-eight

one hundred and three

one hundred and eighty-six

eighty-three

epoxy resin Pouring full seal Closed pillar type 10kV

100/5 200/5 300/5 400/5 500/5 600/5

BC-BJB-220

two hundred and twenty

four hundred

two hundred

four hundred

fifty-eight

one hundred and sixteen

two hundred and five

three hundred and twenty

one hundred and sixty-six

Terms of Use
1. Suitable for indoor and outdoor use.
2. Environmental temperature: not lower than -40 ℃, not higher than 60 ℃; Relative humidity: not exceeding 95% (25 ℃).
3. The altitude should not exceed 3000m, and if it exceeds 3000m, it can be customized according to the actual situation.
4. Areas with seismic intensity of 7 degrees or below; The maximum wind speed shall not exceed 35m/s.
5. Grid frequency: 58-62Hz (60Hz system), 48-52Hz (50Hz system).
6. The air in the installation site should not contain chemical corrosive gases and vapors, and there should be no explosive dust.

Installation requirements
1. The equipment can be lifted using the four mounting holes on the base, and the lifting rope should not be tied to the porcelain column to prevent damage to the equipment.
2. The channel steel bracket for fixing the operating mechanism and the steel pipe from the operating mechanism to the conductive rod shaft of the isolation switch are not within the scope of supply of this device. All are made on site by the installation unit, and the length and size are determined on site.
3. The equipment should be reliably grounded.
4. The appearance and dimensions of the product shall be subject to the actual supply.
5. The installation of the isolation switch can refer to the installation instructions for the GW8 or GW13 series neutral point isolation switch in the attachment.

Instructions for Use
1. The neutral point current transformer of the transformer is generally installed on the transformer outlet bushing and is not included in this device. The wiring diagram of this device is shown in the figure.
When placing an order, the rated voltage of the transformer, the transformation ratio of the current transformer, the rated current of the isolation switch, the form of the operating mechanism, and the rated voltage of the zinc oxide lightning arrester should be informed. When not specifically specified, delivery will be made according to the technical data standard configuration in this manual.
3. The secondary side of the current transformer has two secondary stages of 0.5/10P. For measurement and protection purposes. When not in use, it should be short circuited.
4. The cross-sectional area and type of the wire connected to the neutral point of the transformer are determined by the user based on the actual current.