W-ZJB Neutral Grounding. jpg Product Usage
The ZW-ZJB neutral point grounding protection device is a new generation patented product independently developed by our company to meet the needs of on-site installation. It is applied to the neutral point circuit of 110kV and 220kV power transformers, achieving two different operating modes of transformer neutral point grounding or ungrounded. So as to avoid damage to the transformer caused by system failures, which may cause an increase in the neutral point voltage of the transformer. This product is widely used in fields such as electricity, metallurgy, petrochemicals, mining, construction, environmental protection, and new energy.
Product features
1. Compliant with standards and protected by patents
The ZW-ZJB type neutral point grounding protection device strictly follows DLT620-1997 "Overvoltage Protection and Insulation Coordination of AC Electrical Equipment" Design and manufacture according to relevant national and industry standards such as GB311.1-1997 "Insulation Coordination of High Voltage Transmission and Transformation Equipment" and "18 Major Anti Accident Measures for State Grid Corporation of China".
2. Innovative design and overall installation
The ZW-ZJB neutral point grounding protection device is a complete set of equipment that combines electrical equipment such as isolation switches, zinc oxide lightning arresters, discharge gaps, and current transformers. It has the characteristics of small size, easy installation and debugging, and high reliability.
3 Effective protection, stable characteristics
The ZW-ZJB type neutral point grounding protection device adopts a spherical discharge gap method, which has higher accuracy, less dispersion, and stable characteristics than the commonly used rod discharge gap discharge voltage. It is precise and fully effective in matching with the characteristics of the lightning arrester and the insulation of the main transformer. It has a large thermal capacity and is not easy to burn out. Improved protection security and effectiveness.
Flexible impedance matching and convenient use
The ZW-ZJB type neutral point grounding protection device can use spherical or rod shaped gaps according to user requirements. Lightning arresters and isolation switches can be combined and selected according to engineering needs. The action mechanism of the isolation switch can also be selected to use manual or electric mechanisms according to engineering requirements. The technical parameters of the gap can be debugged in the factory or on-site.
