one , using Way
MNS Type low pressure draw out type switch Cabinet is suitable for three-phase AC fifty 、 60Hz , rated voltage 660V , rated current 4000A The following three phase four wire system and three phase five wire system are used between receiving electric energy and distributing electric energy. Widely used in power distribution centers of power plants, substations, factories, mining enterprises and high-rise buildings PC and Motor control center MCC 。
This product complies with GB7251 、 ZBK36001 、 IEC439-1 （ one thousand nine hundred and ninety-two ）Standards. two Service conditions
one Ambient air temperature is not higher than forty ° C , not lower than -5 ° C , and twenty-four The average temperature within hours is not higher than thirty-five ° C 。
two The relative humidity of ambient air is forty ° C Not more than 50% , relatively high relative humidity is allowed at low temperature, such as twenty ° C When 90% However, it should be considered that moderate condensation may occasionally occur due to temperature changes. three For indoor use, the altitude of the place of use shall not exceed 2000m.
four . It should be installed in a place where there is no violent vibration and impact and where the electrical components are not sufficiently corroded. three Structural characteristics
The basic frame of the switch cabinet adopts the assembled and combined structure KB Profile steel is locked by self tapping screw Fasten and connect each other to form a basic frame, and then add the corresponding door , sealing plates, diaphragms, mounting brackets, buses, functional units and other parts are combined to form a complete switch cabinet. The structure inside the cabinet is galvanized, or aluminum coated zinc plate can be used for production and modular installation（ 1E=25mm ） . The panel of the switch cabinet is made of high-quality steel plate and processed by CNC machine tool. The surface is subject to acid pickling and phosphating treatment and electrostatic spraying, which is abrasion resistant and corrosion resistant. It has both solid mechanical strength and reliable grounding continuity.
The switchgear compartment can be divided into function unit room, bus bar room and cable room. The function of each unit is relatively independent and the function wall of metal plate or flame retardant plate between areas is strictly separated to ensure safe use and prevent accident spread.
The horizontal bus is installed horizontally, effectively reducing electrical stress and thermal stress. Bus section has two （ 30X10 ）、 two （ 60X10 ）、 two （ 80X10 ）、 two （ 100X10 ）、 four （ 60X10 ） five Specifications, corresponding to bus current 1250A2000A 、 2500A 、 3200A 、 4000A , neutral grounding bus N 、 PE by 60X10 , drawer vertical bus is 50X30X5 Angle copper bus bars, all of which are tinned.
MCC Cabinet drawer has 8E/4 、 8E/2 、 8E 、 16E 、 24E House type specification（ 1E=25mm ）。 The drawer has connection position, test position, disconnection position, moving position and separation position. Each drawer and switch are equipped with an agricultural production system mechanical interlock device. When the switch is disconnected, the drawer can be pulled out or inserted; When the switch is in the closing position, the drawer cannot be pulled out or inserted. To prevent unauthorized operation, the operating mechanism can use padlocks to lock the switch in the off position. Functional unit drawers of the same specification can be easily interchanged, and each functional unit drawer has 16-32 For auxiliary contacts, it can meet the needs of remote operation control, electricity metering and automatic monitoring system with computer interface. four Technical parameters Basic electrical parameters
Rated working voltage AC380V ， AC660V Rated insulation voltage AC660V ， AC1000V
Rated current of horizontal bus 1250A ， 2000A ， 2500A ， 3200A ， 4000A Rated current of vertical bus 1000A Large current of feed circuit 2500A Large current of drawer circuit 630A Large capacity of control motor 320KW Rated frequency
fifty 、 60Hz Horizontal bus peak withstand current（ 0.1S ） 105KA ， 176KA Short time withstand current of horizontal bus（ 1S ） 50KA ， 80KA Peak withstand current of vertical bus（ 0.1S ） 105KA Short time withstand current of vertical bus（ 1S ） 50KA Rated power frequency withstand voltage（ 1min ） 2500V Secondary power frequency withstand voltage（ 1min ） 2500V Enclosure protection grade
IP30 ， IP40 The steel plate is processed by CNC machine tool, and its surface is subject to acid pickling and phosphating treatment before electrostatic spraying. It is abrasion resistant and corrosion resistant, with firm mechanical strength and reliable grounding continuity.
The switchgear compartment can be divided into function unit room, bus bar room and cable room. The function of each unit is relatively independent and the function wall of metal plate or flame retardant plate between areas is strictly separated to ensure safe use and prevent accident spread.
The horizontal bus is installed horizontally, effectively reducing electrical stress and thermal stress. Bus section has two （ 30X10 ）、 two （ 60X10 ）、 two （ 80X10 ）、 two （ 100X10 ）、 four （ 60X10 ） five Specifications, corresponding to bus current 1250A2000A 、 2500A 、 3200A 、 4000A , neutral grounding bus N 、 PE by 60X10 , drawer vertical bus is 50X30X5 Angle copper bus bars, all of which are tinned.
MCC Cabinet drawer has 8E/4 、 8E/2 、 8E 、 16E 、 24E House type specification（ 1E=25mm ）。 The drawer has connection position, test position, disconnection position, moving position and separation position. Each drawer and switch are equipped with an agricultural production system mechanical interlock device. When the switch is disconnected, the drawer can be pulled out or inserted; When the switch is in the closing position, the drawer cannot be pulled out or inserted. To prevent unauthorized operation, the operating mechanism can use padlocks to lock the switch in the off position. Functional unit drawers of the same specification can be easily interchanged, and each functional unit drawer has 16-32 For auxiliary contacts, it can meet the needs of remote operation control, electricity metering and automatic monitoring system with computer interface. four Technical parameters Basic electrical parameters
Rated working voltage AC380V ， AC660V Rated insulation voltage AC660V ， AC1000V
Rated current of horizontal bus 1250A ， 2000A ， 2500A ， 3200A ， 4000A Rated current of vertical bus 1000A Large current of feed circuit 2500A Large current of drawer circuit 630A Large capacity of control motor 320KW Rated frequency
fifty 、 60Hz Horizontal bus peak withstand current（ 0.1S ） 105KA ， 176KA Short time withstand current of horizontal bus（ 1S ） 50KA ， 80KA Peak withstand current of vertical bus（ 0.1S ） 105KA Short time withstand current of vertical bus（ 1S ） 50KA Rated power frequency withstand voltage（ 1min ） 2500V Secondary power frequency withstand voltage（ 1min ） 2500V Enclosure protection grade
IP30 ， IP40
