HZJB transformer neutral point grounding protection device
技术参数：
Conditions of use
1. Suitable for indoors and outdoors, ambient temperature: not lower than -40℃, not higher than +60℃, altitude: not more than 3000m;
2. Grid frequency: 58-62Hz (60Hz system), 48-52Hz (50Hz system);
3. Maximum wind speed: no more than 35m/s;
4. The air at the installation site should not contain chemically corrosive gases and vapors, and no explosive dust.
usage notice
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 principle wiring diagram of this device is shown in Figure 1.
2. When designing and ordering, the rated voltage of the transformer, the transformation ratio of the current transformer, the rated current of the isolating switch, the form of the operating mechanism, and the rated voltage of the zinc oxide arrester should be notified. When it is not specified, it will be delivered in accordance with the technical data standard configuration of this manual.
3. The secondary side of the current transformer is equipped with two secondary 0.5/10p as standard for measurement protection. It should be short-circuited when not in use. If you have other requirements, please specify 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 in the scope of supply of this device. 450x450mm steel plate is welded to the top of the cement pole, and steel hoop is reserved 1200mm above the ground. And reserve 2-3 grounding nuts.
6. The cement pole can also be made of metal steel pipe, and the company can provide supporting products and services according to user requirements. Specific matters shall be negotiated and determined when ordering.
注：1、对于HZJB-110 : H1 为1600mm, L1为800mm , L2为850mm。
2、对于HZJB-220 : H1 为2200mm, L1 为1250mm , L2为1200mm。
