Metal Clad Mns Low Voltage Withdrawable Power Distribution Switchgear

GCS low voltage switchgear1 OverviewThe combination of low voltage switchgear (hereinafter referred to as switchgear). It is suitable for AC 50~60HZ, rated working voltage AC 380V, rated insulation voltage 660V, 1600KVA and below distribution transformer power system as distribution, power, lighting, reactive power compensation, motor control center, and in the standard cabinet design fixed scheme and extraction scheme hybrid system to meet the majority of users do not Same use requirement.2 conditions of use2.1 The ambient air temperature is not higher than +40 C, and the average temperature within 24 hours is not higher than +35 C, not lower than - 5 C.2.2 The air is clean, the relative humidity is not more than 50% at the highest temperature + 40 C, and higher relative humidity is allowed at the lower temperature, such as 90% at + 20 C.2.3 no fire, explosion, serious dust, chemical corrosion and severe vibration.2.4 the altitude should not exceed 2000m.2.5 Switchgear is suitable for transportation and storage at - 25 + 55, and within a short time (no more than 24 hours) no more than +70.2.6 if the conditions of use are not met, the user and the manufacturer will negotiate the solution.3 structural characteristicsThe basic frame of switch cabinet is assembled structure, all of which are fastened and connected by screws. A complete switch cabinet is composed of door, partition board, bracket, bus bar, drawer and electrical components.3.1 the outer dimensions and opening dimensions of the frame and parts vary according to modulus E = 20mm.3.2 Because all the structural parts of the frame are fastened and connected by screws, the welding deformation and stress are avoided, the precision is improved, the universality is strong, the applicability is good, and the mechanical strength is large, which fully meets the various performance requirements and changes of the switchgear.3.3 In MCC scheme, the switch cabinet is divided into three areas (room), bus area, electrical equipment area and cable area, and the three areas are separated by steel plate to ensure the normal operation of the line, effectively prevent the expansion of the fault. When the drawer is out of the cabinet, the charged body inside the cabinet is not exposed, safe and reliable.3.4 In PC scheme, the manual mechanism of AH and ME circuit breakers is protruding out of the door. When operating by hand, it is safe and convenient without opening the door plate.3.5 In the fixing scheme, the features of the fixing scheme, such as simplicity, practicality and low price, are retained, and the appearance of the drawer cabinet is the same. The interior of the fixing scheme is also divided into busbar area, electrical equipment area and cable area. The three areas are also separated by steel plates or insulating plates, which are safe and reliable. It is an ideal substitute for the domestic fixed old products. Equipment;3.6 The drawer of MCC cabinet has four standard sizes, they are 200, 300, 400, 600 respectively. They are light in structure, easy to assemble and have high dimensional accuracy. They can be changed according to the design and user's requirement. The drawer unit has good interchangeability, and the working position, separation position and handle can be locked. Prescribed disconnection position;3.7 The switchgear is designed for three-phase four-wire and three-phase five-wire distribution system. The neutral bus N line and the protective grounding bus PE line are installed at the bottom of the cabinet, and the outlet end is connected with the bus line, which makes it very convenient for users to connect the cable.3.8 In order to ensure the reliability and continuity of grounding, all drawer guideways and other general components in the cabinet are galvanized.3.9 no natural ventilation net cover is installed on the top of the switchgear without lowering the protection level of the enclosure.In short, the switch cabinet is modeled on the advanced foreign cabinet structure, high mechanical strength, high degree of standardization, the overall compliance with IEC 439 international standards and GB 7251 national standards, the protection level of IP3X in GB4208, the requirements and IEC 529 IP30 equivalent.4 technical parameters
Rated operating frequency
50~60
Rated working voltageV)
380
Rated insulation voltage(V)
660
Rated working current of horizontal busbar(A)
630,1000,1600,2500
Rated working current of plug-in busbar(A)
630,800,1000,1600
Main circuit connector(A)
200,400
Auxiliary circuit connector(A)
10
Feed circuit maximum current (A)
1600
Electric current(A)
1000,1600,2000,2500,3200
Main busbar rated short-time withstand current 1 seconds effective value(KA)
30,50,80
Peak rated current tolerance of main busbar rated(KA)
63,105,176
Power frequency withstand voltage 1 minutes(V)
2500
Control motor capacity(KW)
0.5~320
Enclosure protection class(grade)
IP30