Overview

XGN66-12 fixed closed switchgear (hereinafter referred to as switchgear) absorbs advanced foreign technology. It is small in size, only 50% of the volume of ordinary switchgear; the circuit breaker has high reliability and good performance; "five preventions" The interlocking mechanism has the advantages of reliability and simplicity. The switch cabinet is an indoor complete set of 3.6, 7.2, 12KV three-phase AC 50Hz single busbar segmented devices, used for receiving and distributing electric energy. It also has the functions of controlling, protecting and monitoring circuits. It can be used in various types of power plants, substations, industrial and mining enterprises, high-rise buildings and other places. It can also be used in switching stations in combination with ring main units.

Standards compliant:

GB3906-2006 《3~35kV AC metal-enclosed switchgear》

GB11022-99 《General Technical Conditions for High Voltage Switchgear》

 IEC60298 《AC metal-enclosed switchgear and control equipment with rated voltage above 1kV and 50kV and below》

DL404-97 《Technical Conditions for Ordering Indoor AC High Voltage Switchgear》

Operating environment conditions

(1)Normal environmental conditions

   1. Ambient air temperature upper limit: +40℃, lower limit: -10℃.

   2. Altitude: no more than 1000m.

   3． Relative ambient temperature: daily average not greater than 95%, monthly average not greater than 90%.

   4. Earthquake: intensity does not exceed 8 degrees.

   5. The surrounding air is not significantly contaminated by corrosive or flammable gases, water vapor, etc.

   6． There is no serious pollution and frequent severe vibration, and the severity design meets Class 1 requirements under harsh conditions.

(2)Special working conditions

  When used under normal environmental conditions exceeding the regulations, the user and manufacturer must negotiate.

Technical indicators

•Rated voltage (KV) 3.6/7.2/12

•Power frequency withstand voltage (KV) 42(1min)

•Impact withstand voltage (KV) 75

•Rated frequency: 50Hz

•Rated current (A) 630～1250

•Rated thermal stable current (KA 4S) 20～31.5

•Rated dynamic stable current (KA) 50～80

•Rated short-circuit breaking current (KA) 20～31.5

•Rated short circuit making current (KA) 50～80

•Rated voltage of opening and closing and auxiliary circuit (V) DC 24, 36, 48, 60, 110, 220, AC 110, 220

•Protection level IP2X

Structure introduction

   The body of this switch cabinet is welded with high-quality angle steel; the circuit breaker room is located in the middle (lower) part of the cabinet, making it easy to install, debug, and maintain. It is equipped with ZN63A (VS1-12) circuit breaker as standard and is equipped with a pressure relief channel to ensure personal safety; it adopts an advanced and reliable rotary isolation switch, which can safely enter the circuit breaker room for maintenance when the main busbar is live; the whole cabinet protection level is IP2X ; The equipment is equipped with a reliable and fully functional mandatory mechanical locking device, which can easily and effectively meet the "five prevention" requirements; it has a reliable grounding system; the door is equipped with an observation window to clearly observe the working status of the components in the cabinet; the operating mechanism is locked using The same JSXGN locking mechanism used in the XGN2-12 cabinet is simple, reliable, convenient and practical; the incoming and outgoing cables are lower than the front of the cabinet bottom, making it convenient for users to connect.