XGN66-12 AC Fixed Metal-clad Switchgear is a new generation of high-voltage electrical complete set products. It complies with the national standard GB3906 “10-35KV AC Metal-Enclosed Switchgear” and the power industry standard DLT404-1997 “Technical Conditions for Indoor AC High-Voltage Switchgear Orders.” It also meets the international standard IEC62271-200 ” AC Metal-Enclosed Switchgear and Control Equipment Above 1kV and Below 52kV.” It has the “five-prevention” interlocking function.
This product absorbs advanced foreign technology and is designed and developed to address the high accident rate and large volume issues of similar existing switchgear in operation in China. It has the advantages of small size, occupying only 50% of the volume of ordinary switchgear. The circuit breaker is reliable and has good performance, and the “five-prevention” interlocking mechanism is reliable and simple.
Main Uses and Applicable Scope
XGN66-12Prefabricated (indoor) AC metal-enclosed switchgear is suitable for 3.6-12kV three-phase AC 50Hz single-bus segmented indoor complete sets. It serves as the receiving and distributing electrical energy and has functions such as controlling, protecting, and monitoring the circuit. It can be used in various types of power plants, substations, industrial and mining enterprises, high-rise buildings, and can also be combined with ring network cabinets for opening and closing stations.
Ambient Condition
Ambient Air Humidity: Upper limit +40°C, lower limit -10°C.
Altitude: Maximum installation altitude of the equipment is 1000m.
Temperature: Daily average relative humidity not exceeding 95%，monthly average relative temperature not exceeding 90%.
Seismic: Seismic intensity not exceeding 8 degrees
Surrounding air should not be significantly polluted by corrosive or combustible gases, steam, etc.
No severe pollution and frequent severe vibration in the area.
Product Structure
The switchgear is a metal-clad prefabricated structure, as shown in Figure 1. The frame of the cabinet is assembled from bent steel plates. The interior of the cabinet is divided into a circuit breaker chamber, a main bus chamber, a cable chamber, and a secondary element chamber.
The top of the switchgear is the bus chamber, with the secondary element chamber in front. The middle of the cabinet is the circuit breaker chamber, and on the right side, there are interlock mechanisms for isolating switches and grounding switches. The rear is
equipped with current transformers and lighting devices, and the lower part of the cabinet is the cable chamber, where surge arresters can be installed.
