Three, GCK type low-voltage withdrawable switchgear
- Overview
GCK low-voltage pull-out switchgear is suitable for power plant, metallurgical rolling, petrochemical, light textile, port, building hotel and other places as AC three-phase four-wire or five-wire system, voltage 380V, 50H power system distribution and motor control.
GCK is a comprehensive type test, manufactured by the assembly of advanced low-voltage switchgear, it conforms to:
National standard GB7251-87 low voltage switchgear
Professional standard ZBK36001-89 pull-out switchgear set
International standard IEC439 - Model meaning
- Use environment
3.1 The ambient air temperature shall not be higher than +40℃, not lower than -5℃, and the average temperature shall not be higher than +35℃ within 24 hours.
3.2 The relative humidity is not more than 50% at the highest temperature +40℃, and a higher relative humidity is allowed at a lower temperature, such as 90% at +20℃;
3.3 The air is clean, free of corrosive and explosive gases, and free of conductive and insulating dust.
3.4 No significant shaking and shock vibration, vertical installation, tilt should not be greater than 5 degrees;
3.5 The altitude does not exceed 2000 meters;
3.6 The switchgear is suitable for transport and storage at the following temperatures; -25 ° C to +55 ° C, not exceeding +70 ° C for a short period of time (not more than 24 hours);
3.7 If the above conditions cannot be met, the User shall negotiate with the manufacturer. - Main technical parameters
4.1 Rated insulation voltage 660V
4.2 Rated working voltage 380V
4.3 Rated working voltage of auxiliary circuit AC 380V, 220V
4.4 Bus current rating: 1000, 1250A, 1600A, 2000A, 2500A, 4000A
4.5 Bus rated short-time withstand current: 50kA(RMS)1 second
4.6 Bus rated peak withstand current: 105kA
4.7 Branch bus rated current: 630A, 800A
4.8 Branch bus rated short-time withstand current: 30kA, 50kA(RMS)1 second
4.9 Rated peak withstand current of branch bus: 63kA, 105kA
4.10 Enclosure protection class: IP40 - Classification of switchgear
5.1 Receiving Cabinet 5.4 Motor control cabinet
5.2 Busbar Connection Cabinet 5.5 Power Switch Cabinet
5.3 Feed Cabinet 5.6 Power factor compensation cabinet
Step 6 Structure
6.1 The cabinet body is formed by thin steel sheet stamping, and adopts the standardized design of 20mm module. The structural parts have strong versatility and mechanical strength.
6.2 The upper part of the cabinet is the main bus room, the front part is the electrical room, and the rear part is the cable inlet and outlet room. Each room is isolated with steel plate or insulation board to ensure the safety of use.
6.3 The surface protective layer of the cabinet structure parts has two kinds of galvanized or electrostatic powder spraying, beautiful color and reliable quality.
6.4 Mechanical interlock: The door of the drawer compartment of the MCC cabinet is equipped with a mechanical interlock with the operating handle of the circuit breaker or isolation switch, and the door can only be opened when the handle is in the breaking position to ensure safety. The interlock mechanism is equipped with an unlocking device, and the operator can use the unlocking device to open the door of the drawer and inspect the inside of the drawer when the power is on.
6.5 The power switch, the contact switch and the drawer of the MCC cabinet have three positions: the on position, the test position and the off position.
6.6 The top of the switch cabinet can be equipped with a bus bridge according to power supply or communication needs, and the height of the bus bridge from the top of the cabinet and the length of the bus bridge can be designed and supplied by the manufacturer according to the needs of users.
- Dimensions
Cabinet height 2200mm, cabinet width and depth are as follows:
7.1 Receiving Cabinet and busbar liaison cabinet (see Table 1 for details)
The width of the cabinet is divided into 600 according to the switching current level and the way of incoming and outgoing lines; 800; 1000; 1200; (800+400)mm
Cabinet depth: 800mm; 1000mm
(1000mm recommended; Upper and upper outlet cabinet depth must be 1000mm)
7.2 Feed Cabinet
Cabinet width: 600mm; 800mm
Cabinet depth: 800mm; 1000mm
(1000mm recommended; The upper outlet cabinet must be 1000mm)
7.3 Motor Control Cabinet (MCC Cabinet)
Cabinet width: 600mm; 800mm
Cabinet depth: 800mm; 1000mm
(1000mm recommended; The upper outlet cabinet must be 1000mm)
7.4 Power factor compensation cabinet
Cabinet width: 600mm; 96kVar, 128kVar
800mm; 128kVar, 160kVar
1000mm; 160kVar, 200kVar, 250kVar
Cabinet depth: 800mm; 1000mm(1000mm recommended; Cabinet depth of more than 10 channels must be 1000mm) - Cabinet shape
Installation dimensions and mounting holes are shown in the following table
Product installation base
