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On-off control circuit for 10kV motor

A switch control circuit and motor technology, applied in the direction of electrical program control, sequence/logic controller program control, etc., can solve the problem of single control mode, improve production efficiency and automation, improve work, and realize manual and The effect of automatic control

Active Publication Date: 2016-02-17
ANHUI MASTEEL ENG & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of a single control mode in the high-voltage motor control in the prior art, the present invention proposes a 10kV motor switch control circuit, which uses the instrument control detection signal of the motor body and its auxiliary system as the control condition for starting and stopping the motor, and can realize Switch between manual control and automatic control, and realize the control of high-voltage motors in both the computer in the central control room and the operation box next to the machine

Method used

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  • On-off control circuit for 10kV motor
  • On-off control circuit for 10kV motor
  • On-off control circuit for 10kV motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Such as figure 1 As shown, the 10kV high-voltage primary circuit is connected in series with a circuit breaker QF. The circuit breaker QF is installed in the switch cabinet. The circuit breaker QF is connected to the high-voltage motor. On the computer in the computer in the central control room, the computer in the computer in the central control room outputs signals to the switch cabinet, and the electrical signal in the operation box next to the machine is transmitted to the computer in the computer in the central control room on the one hand, and to the switch cabinet on the other hand.

[0059] Button TA is on the switch cabinet, motor start indicator light YD, selection switch XK, control switch KK, emergency stop button JA, motor running signal lamp HR and motor stop signal lamp HG are all located in the operation box next to the machine. The selection switch XK on the operation box next to the machine adopts a three-position model, and it is placed in the middle...

Embodiment 2

[0104] combine Figure 1-4 , a 10kV motor switch control circuit, the method of operation is the same as that of embodiment 1, and the structure is as follows: it includes an automatic air switch ZK, a microcomputer comprehensive protection device 1n, a circuit breaker QF, a control switch KK, a selection switch XK, intermediate relays ZJT and ZJH, The signal lamps YD, HR, HG, switch QK and emergency stop button JA, the positive and negative terminals of the automatic air switch ZK are respectively connected to the positive and negative poles of the DC 220V working power supply; the motor start indicator YD, the selection switch XK, The control switch KK, emergency stop button JA, motor running signal light HR and motor stop signal light HG are all located in the operation box next to the machine; the switch QK is "prohibited operation / allowing remote control", and the selection switch XK is "beside the machine / computer", The control switch KK is "start / stop".

[0105] The mi...

Embodiment 3

[0133] A shaft furnace in a steel mill is equipped with a combustion-supporting fan with a rated working voltage of 10kV and a rated power of 280kW. According to the factory operation position setting, the high-voltage switchgear of the motor is managed and maintained by the substation, and the substation adopts regular inspections, and there is no one on duty at ordinary times, and the fans are controlled by the production line operator.

[0134] According to the production requirements, the fan needs to be controlled by the operation box next to the machine and the computer in the central control room. The start-up conditions of the fan are that the inlet valve is closed, the relief valve is opened, the winding temperature is normal, the lubricating oil pressure and oil level are normal, and the electric control design will be the outlet and inlet. The valve signal is sent to the computer, and the oil pressure, oil level signal and winding temperature signal of the lubricatin...

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Abstract

The invention discloses an on-off control circuit for a 10kV motor, and belongs to the field of high-voltage motor control. The on-off control circuit comprises automatic air switches ZK, a microcomputer integrated protection device 1n, breakers QF, a control switch KK, a selection switch XK, intermediate relays ZJT and ZJH, indicator lamps, a selector switch QK and emergency stop buttons JA. The positive end of one automatic air switch ZK is connected with the terminal X1 of the microcomputer integrated protection device 1n, and the terminal X6 of the microcomputer integrated protection device 1n is connected with the negative end of the corresponding automatic air switch ZK to form a power source loop of the microcomputer integrated protection device 1n; the negative end of one automatic air switch ZK is connected with one end of the switching-on allowing signal lamp beside the motor, the other end of the automatic air switch ZK is connected with one end of a normally closed auxiliary contact of the corresponding breaker QF, and the other end of the normally closed auxiliary contact of the corresponding breaker QF is connected with a control contact of the selection switch XK to form a loop allowing the corresponding indication lamp to be turned on. Manual control and automatic control can be switched through the on-off control circuit.

Description

technical field [0001] The invention relates to the field of high-voltage motor control, in particular to a 10kV motor switch control circuit. Background technique [0002] Industrial and mining enterprises are equipped with a large number of high-voltage motors, with high voltage levels, high single-machine power, and expensive equipment. In terms of motor operation, due to the constraints of traditional management ideas, detection methods and automation level, manual control is adopted in the switch cabinet and the operation box next to the machine for the start of a single machine. The starting of the motor relies on on-site human eye observation, scheduling contact, manual command, lack of necessary working condition detection, and a certain degree of blindness in operation, which often causes burning and mechanical failure during the starting process of the motor, which brings great economic losses to the factory. [0003] All kinds of factory design manuals and standa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04
CPCG05B19/04
Inventor 叶远龙金春晖
Owner ANHUI MASTEEL ENG & TECH GRP
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