HZJB type transformer neutral point grounding protection device
Technical parameters:
Conditions of useend
1. Suitable for indoor and outdoor use, ambient temperature: no less than -40℃, no more than +60℃, altitude: no more than 3000m;
2. Grid frequency: 58-62Hz (60Hz system), 48-52Hz (50Hz system);
3. Wind speed: no more than 35m/s;
4. The air in the installation site should not contain chemical corrosive gases and vapors, and there should be no explosive dust.
Instructions for use
1. The neutral point current transformer of the transformer is generally installed on the outlet bushing of the transformer and is not included in this device. The schematic wiring diagram of this device is shown in Figure 1.
2. When designing and ordering, the rated voltage of the transformer, the ratio of the current transformer, the rated current of the isolating switch, the type of operating mechanism, the rated voltage of the zinc oxide arrester and other parameters should be informed. When not specified, delivery will be based on the standard configuration of the technical data in this manual.
3. The secondary side of the current transformer is equipped with two secondary 0.5/10p as standard for measurement and protection. They should be short-circuited when not in use. If you have other requirements, please indicate when ordering.
4. The cross-section and type of wire connected to the neutral point of the transformer are determined by the user.By cold end cable terminal manufacturer-Hengyuan Technology
5. The cement pole is prepared by the user and is not included in the scope of supply of this device. A 450x450mm steel plate is welded to the top of the cement pole, and a steel hoop is reserved 1200mm above the ground. And reserve 2-3 ground nuts.
6. Cement poles can also be made of metal steel pipes, and our company can provide supporting products and services according to user requirements. Specific matters will be discussed and determined when ordering.
Note:1,forHZJB-110 : H1for1600mm, L1for800mm, nofor850mm。
2,forHZJB-220 : H1for2200mm, L1for1250mm , L2for1200mm。
