The switchgear is suitably used in power plants, substations, petro-chemical engineering departments, manufacturing and mining enterprises, high rises as power center, distributing center and motor control center for power distribution, control and compensation.

 

It satisfies with particular needs of computer interface in low voltage power control center and motor control center especially in large capacity single set power plants, large scale petro-chemical complexes.

 

As a new generation of low voltage withdrawble switchgear developed recently, it has been designed on requirements from national electric power ministerial superior authorities concerned, wide electric power customers and design institutions for meeting the needs of continuous enhancement of capacity, computer interface, power concentrated control and reducing downtime in fault restoration on principle of safety, economical result, reasonability and reliability, featuring high making and breaking capacity, excellent performance both in short time withstand current and peak value withstand current, flexible electrical schemes, easy combinations, perfect series and applications, novel structure and high class of protection.

 

The switchgears is manufactured to various relevent standards such as IEC439 – 1 “Low Voltage Switchgear and Controlgear”, GB7251 “Low Voltage Switchgear” and ZBK 36001 “Low Voltage Withdrawble Switchgear”.

 

 

 

       2.1  Ambient temperature not higher than +40℃ nor lower than -5℃ with 24-hour average not more than +35℃.  If actual temperature is over the range of mentioned above, degrading application is necessary as per actual situations.

 

       2.2  The altitude of application site not over 2000 meters above sea level when in indoor use.

 

       2.3  The relative humidity of ambient air not exceeding 50% at the maximum temperature of +40℃, and higher humidity permissible at lower temperatures, e.g., 90% at 20℃.   Allowance should be made for the impact of accident condensation caused by abrupt temperature fluctuation.

 

       2.4  The inclination to vertical surface when installation not over 5% and relative smoothness and flatness kept as per GBJ232 – 82 Standard.

 

       2.5  Places where there is no violent shock and impact nor sufficient corrosive materials to corrode electrical components and parts.

 

       2.6  Particular requirements may be satisfied through discussion with the manufacturer.

 

 

 

               3.1  Rated insulation voltage                        AC  660 (1000) V

               3.2  Rated working voltage         Primary circuit    AC  380 (660) V

                                                                                   Aux. circuit     AC  380, 220, 24V

                                                                                                         DC  220, 110V

               3.3  Rated frequency                                                          50 (60) Hz

               3.4  Rated current of horizontal busbar                   ≤ 4000A

               3.5  Rated current of vertical busbar                                 1000A

               3.6  Rated peak value withstand current                           105 (176) kA

 

 

 

There are 32 groups with 118 specifications for primary circuit schemes excluding derivative schemes and specifications due to variations in control and protection of auxiliary circuits.

 

The primary schemes are prepared as per comments and suggestions from wide designers, manufacturers, testers and application organizations for the needs of power generation, provision, application and various other customers.  The schemes may by selected with a distribution transformer of rated working current 4000A and rated capacity 2500kVA and below.

 

Besides, condenser compensation cubicle is designed to cater for needs of boosting power factor, and reactor cubicle for need of comprehensive investment.

 

The primary circuit scheme drawings are attached in this manual.