Modular Ring Main Unit

○ Model Meaning

○ Main uses and application scope of the HXGH-12 type Modular Ring Main Unit

Modular Ring Main Unit is suitable for indoor complete sets of 3.6-12KV three-phase alternating current with 50Hz single bus section, which is used for receiving and distributing electric energy, and has the functions of controlling, protecting and monitoring the circuit. It can be applied to various types of power plants, substations, industrial and mining enterprises, high-rise buildings and other places, and can also be combined with ring network cabinets to be used in switching stations.

○ Main structure and characteristics of the HXGH-12 type Modular Ring Main Unit

▶ The Modular Ring Main Unit is welded with high-quality angle steel.

▶ The circuit breaker room is located in the middle (lower) part of the cabinet, which is convenient for installation, debugging and maintenance. The standard is equipped with ZN63AIVS1-12) circuit breaker, and there is a pressure release channel to ensure personal safety.

▶ Advanced and reliable rotary disconnector can be used to safely enter the circuit breaker room for maintenance when the main bus is charged. Advanced and reliable rotary disconnector can safely enter the circuit breaker room for maintenance when the main bus is electrified.

▶ The protection level of the Modular Ring Main Unit  is IP2X.

▶ Equipped with reliable and fully functional compulsory mechanical locking device, which can meet the requirements of "five precautions" simply and effectively.

▶ Have a culpable grounding system.

▶ The door is equipped with an observation window, which can clearly observe the working state of the components in the cabinet.

▶ The operating mechanism is locked by a mechanical lock that is more reliable than XGN66-12.

▶ The incoming and outgoing cables are lower than the front of the cabinet bottom, which is convenient for users to connect.

○ Using Environmental conditions of the HXGH-12 type Modular Ring Main Unit

1. The upper limit of ambient temperature is +40℃ and the lower limit is -10℃;

2. The altitude of Modular Ring Main Unit should be less than 1000m;

3. The daily average value of air relative humidity is not more than 95%, and the monthly average value is not more than 90%; The daily average value of water vapor is not more than 2.2x10-3Mpa, and the monthly average value is 1.8x10-3Mpa;

● Main technical parameter of the HXGN□-12 type Modular Ring Main Unit