CN2394363Y

CN2394363Y - Comprehensive protector for ignition and running of motor

Info

Publication number: CN2394363Y
Application number: CN 99253233
Authority: CN
Inventors: 苏玉书
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-04
Filing date: 1999-11-04
Publication date: 2000-08-30
Anticipated expiration: 2009-11-04

Abstract

The utility model provides a comprehensive protector for start and running of a motor. The comprehensive protector is composed of a thermorelay and an electronic protector of an integrated circuit, which are connected and combined together and are connected with a main contactor, a starting contactor, a time relay, a self-coupling starting transformer, a megohmmeter and a diverter switch. The protector of the utility model as a novel comprehensive protector for the motor can protect the motor from phase failure (lack of phase), over-voltage, overload and short circuit, can have a secondary protection function, can directly measure the insulation resistance of the motor, and can be matched with various motors as well as diving pumps.

Description

Motor starting operation comprehensive protection device

The utility model relates to a kind of control device of motor, the control protector of especially a kind of motor starting and operation.

In the prior art; common motor protector mainly contains thermal relay formula protector such as JR16 series of heat relay and has the electronic type electric motor protector of the phase failure, overvoltage, overload protection function, as BHQ (JD-5, the JD-6) electronic protector of integrated circuit.Because mostly existing protector is that single level protector is joined and is connected in motor and once protects.In use in case occur protector malfunctioning or regulate improper; just lose protective effect; and influence the operate as normal of motor; especially existing protector can not directly record and show the insulation of Electric Motor resistance value, and particularly the protection and the use of motor for submerged pump bring inconvenience for motor for these.

The purpose of the utility model provides a kind of novel structure, reasonable in design, can be at motor starting and automatic protection in service, maintenance and electric motor protector easy to use.

For achieving the above object, the technical solution adopted in the utility model is: the electronic protector of thermal relay and integrated circuit is connected to combine and join connects main contactor, starting contactor, the time relay, autostarter transformer, again with addition of connecting megohmmeter and diverter switch, that is: the thermal relay input connects the circumscripted power line of this comprehensive protection device, output line connects behind the main contactor output line that the company's of wearing electronic protector connects this protector again, 2 external connections of electronic protector are connected to main contactor, and the auxiliary normally closed interlock of often driving auxiliary contact and starting contactor that is connected main contactor after the normally closed interlock of electronic protector and thermal relay is connected mutually respectively forms self-locking circuit; The incoming line of megohmmeter connects after the diverter switch in succession in the output line of thermal relay; the output line of megohmmeter is ground connection and the output line that is connected in this protector respectively; diverter switch also connects starting contactor, main contactor and the time relay, and connect to form is the comprehensive protection device of motor.During use, with the external connection of this protector be connected with power line, output line is connected with motor.Just but actuating motor carries out operation.At motor starting and in service, in case when the phase failure (phase shortage), overvoltage, overload, short circuit occurring, all can protect automatically and indicate.Because this protector is a two-stage protection structure, even break down when causing protection malfunctioning at thermal relay or the arbitrary protector of electronic protector, another protector also can be implemented protection, guarantees that motor starts safely and reliably and moves.

Because the utility model is that the combination of thermal relay and electronic protector is linked to be two-stage integrated protection structure for motor, and joins and connected megohmmeter and can directly record insulation of Electric Motor resistance.Therefore; the utility model has the advantages that the phase failure (phase shortage), overvoltage, overload, the short-circuit protection that can carry out motor; has secondary protection function again; can also directly record insulation of Electric Motor resistance; its novel structure, reasonable in design, installation, maintenance and easy to use; can be used in various motor and also be applicable to immersible pump, be a kind of novel integrated protector for electric motor.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the circuit theory diagrams of the utility model embodiment.

Fig. 2 is the product structure diagrammatic sketch of the utility model embodiment.

Embodiment as shown in Figure 1, the utility model comprises: thermal relay RJ, electronic protector BHQ, main contactor SC, starting contactor QC _1-2, time relay sj, megohmmeter B and diverter switch K.Thermal relay RJ is a JR16 series of heat relay, and electronic protector BHQ is electronic type JD-5, the JD-6 motor protector of NE556N integrated circuit.The incoming end of thermal relay RJ connects circumscripted power line A, B, the C of the utility model comprehensive protection device, and the output line of thermal relay RJ connects the main contact SC of main contactor SC ₁, main contactor SC main contact SC ₁Three output lines wear and connect output line A ', B ', the C ' that connects the utility model comprehensive protection device behind the electronic protector BHQ, in order to connect motor D, 2 external connection X of electronic protector BHQ ₁, X ₂Be connected to main contactor SC sucking coil two ends, the normally closed interlock BHQ of electronic protector BHQ ₁Normally closed interlock RJ with thermal relay RJ ₁What mutually connect main contactor SC after the series connection more respectively often opens auxiliary contact SC ₂Auxiliary normally closed interlock QC with starting contactor ₃Form self-locking circuit; Be connected to another output line that connects thermal relay RJ behind the fuse RD that connects again behind the output line, another connection diverter switch K of thermal relay RJ behind a series connection fuse of two incoming lines RD of megohmmeter B; ground connection of two output lines of megohmmeter B, another is connected in the output line of this comprehensive protection device, and diverter switch K also connects starting contactor QC, main contactor SC, time relay sj.

The utility model or with the normally closed interlock BHQ of electronic protector BHQ ₁Normally closed interlock RJ with thermal relay RJ ₁Be directly connected in after the series connection on the sucking coil of main contactor SC, or the general independent BHQ of arbitrary normally closed interlock wherein ₁Or RJ ₁Be connected on the sucking coil of main contactor SC.

The utility model also can be again at main contactor three-phase main contact SC ₁Incoming end connect starting contactor QC ₁Main contact QC ' ₁After connect autostarter transformer ZBQ again, the tap output line of transformer ZBQ connects starting contactor QC ₂Main contact QC ' ₂After output line A ', B ', the C ' of this protector in succession.

The utility model also is connected with power supply indicator D respectively on thermal relay RJ output line _1-3, starting indicator light D ₄, run indicator D ₅, stop indicator light D ₆On this comprehensive protection device circumscripted power line, also be connected with ammeter A, voltmeter V respectively.

Claims

1, a kind of motor starting operation comprehensive protection device, it comprises thermal relay RJ, electronic protector BHQ, main contactor SC, starting contactor QC _1-2, time relay sj, it is characterized in that also comprising megohmmeter B and diverter switch K, thermal relay RJ incoming end connects circumscripted power line A, B, the C of this protector, output line connects the main contact SC of main contactor SC ₁, main contact SC ₁Three output lines wear and connect output line A ', B ', the C ' that connects this protector behind the electronic protector BHQ, 2 external connection X of electronic protector BHQ ₁, X ₂Be connected to main contactor SC sucking coil two ends, the normally closed interlock BHQ of electronic protector BHQ ₁Normally closed interlock RJ with thermal relay RJ ₁What connect main contactor SC after the series connection respectively often opens auxiliary contact SC ₂Auxiliary normally closed interlock QC with starting contactor ₃Form self-locking circuit; one of two incoming line of megohmmeter B connect another output line that connects thermal relay RJ behind the output line, another connection switching controls K switch of thermal relay RJ again; ground connection of two output connections of megohmmeter B, another is connected in the output line of this protector, and diverter switch K also connects starting contactor QC, main contactor SC, time relay sj.

2, motor protector according to claim 1 is characterized in that or with the normally closed interlock BHQ of electronic protector BHQ ₁Normally closed interlock RJ with thermal relay RJ ₁Be directly connected in after the series connection on the sucking coil of main contactor SC, or general arbitrary normally closed interlock BHQ wherein ₁Or RJ ₁Be connected in separately on the sucking coil of main contactor SC.

3, motor protector according to claim 1 and 2 is characterized in that or connects starting contactor QC at the incoming end of main contactor SC again ₁Main contact QC ' ₁The back connects autotransformer ZBQ, and the tap output line of transformer ZBQ connects starting contactor QC ₂Main contact QC ' ₂After output line A ', B ', the C ' of this protector in succession.