CN210894623U

CN210894623U - Motor insulation testing device

Info

Publication number: CN210894623U
Application number: CN201921506923.9U
Authority: CN
Inventors: 李跃; 樊伟; 朱旻鹏; 周鼎鼎; 范庆波; 柴立功; 雷兴振; 赵兴恒
Original assignee: Hefei Zhongke Genyun Equipment Management Co ltd
Current assignee: Hefei Zhongke Genyun Equipment Management Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-06-30
Anticipated expiration: 2029-09-11

Abstract

The utility model belongs to the technical field of the motor test technique and specifically relates to a motor insulation test device, including the insulation resistance tester, 7 groups of auxiliary relay and contactor, through PLC module to auxiliary relay and the successive logic control of contactor, make the motor insulation tester measure under the different circuit operating mode between the motor winding, at the insulation resistance value of different time point departments between winding and the casing, and calculate and judge whether current driving motor state satisfies motor start standard through the inside logic of PLC module, finally will be whether the information transmission of starter motor gives down driving motor, if have trouble, then with the fault alarm signal last host computer who reaches man-machine switching unit. The utility model has the advantages of insulation resistance measurement accuracy is high, insulation resistance efficiency of software testing is high, data processing and judgement are intelligent.

Description

Motor insulation testing device

Technical Field

The utility model relates to a motor test technical field specifically is a motor insulation testing arrangement.

Background

At present, the circulating water pump of petrochemical company does not carry out remote control and low pressure interlocking before opening, namely before opening and close each water pump, operating personnel must go to the scene and carry out a series of manual operation, including whether each insulation resistance of inspection every motor satisfies the requirement, need pass through comparatively loaded down with trivial details wiring and measurement to driving motor does not break down, and its complex operation is and comparatively consuming time.

In the field of petrochemical industry, still there is not a comparatively mature motor insulation testing device, and the current motor insulation testing device who is used for other technical field can't insert among the DCS distributed intelligent control system of petrochemical company. So intelligent start-stop and fault alarm cannot be realized.

Although CN109709482A discloses an insulation detection system for motor testing in the prior art, the insulation detection system comprises an insulation detection device, a signal conditioning module, a central processing unit, an alarm module, a serial port module, a PC and a display module. The device can realize the insulation detection of motor, reports to the police simultaneously and shows, and the device security is higher simultaneously, has fine practicality. However, how the insulation detection device is used in cooperation with the motor in the above-mentioned scheme, and further insulation detection of the motor is not shown. In view of this, a motor insulation testing device is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor insulation test device to solve the problem that proposes among the above-mentioned background art. The motor insulation testing device has the advantages of high insulation resistance measuring precision, high insulation resistance testing efficiency, intelligent data processing and judgment and the like.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a motor insulation test device, including motor insulation tester, intelligent control and data processing unit, motor insulation tester is connected with electric circuit, this electric circuit includes 7 groups of auxiliary relay, the contactor, wherein on 6 groups of auxiliary relay's the auxiliary contact respectively with driving motor's 6 terminals, motor insulation tester is connected, remaining 1 group of auxiliary relay's auxiliary contact is connected to on 6 groups of auxiliary relay's the auxiliary contact and the 3 output terminals of driving motor's the line between, the contactor is connected with the auxiliary relay, motor insulation tester is connected with intelligent control and data processing unit, 7 groups of auxiliary relay are connected respectively to this intelligent control and data processing unit, the main contact of contactor, and connect the man-machine switching unit.

Preferably, three auxiliary contacts of the contactor are connected between 3 output terminals of the driving motor and 6 sets of intermediate relays to form a star connection electric circuit.

Preferably, three auxiliary contacts of the contactor are respectively connected to 3 input terminals and 3 output terminals of the driving motor, and a triangular connection electric circuit is formed between 6 groups of intermediate relays.

Preferably, the motor insulation tester adopts a BY2672 digital insulation resistance tester.

Preferably, the control chip of the intelligent control and data processing unit adopts a PLC module of SIMATIC S7-1200 model.

Preferably, the human-computer interaction unit comprises an upper computer.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses, can realize that intelligent key opens and stops, under the control of inside PLC module, judge whether driving motor insulation resistance numerical value is up to standard; under the condition that the insulation resistance value of the driving motor does not reach the standard, fault early warning can be realized, if a fault occurs, a fault signal is sent to an upper computer in the man-machine interaction unit through the intelligent control and data processing unit, and therefore workers in a central control room are informed to overhaul the fault on site.

Drawings

FIG. 1 is a block diagram schematically illustrating the structure of the present invention;

FIG. 2 is a star connection electrical schematic of the present invention;

FIG. 3 is a triangular connection electrical circuit diagram of the present invention;

fig. 4 is a work flow diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution:

a motor insulation test device comprises a motor insulation tester, an intelligent control and data processing unit and a man-machine interaction unit; the intelligent control and data processing unit controls an intermediate relay and a contactor in the circuit, ensures that equipment can complete required circuit switching, and measures a required insulation resistance value; the intelligent control and data processing unit and the man-machine interaction unit realize the functions of signal conditioning, data acquisition, intelligent control, man-machine interaction and the like.

Preferably, in the above technical solution, a BY2672 digital insulation resistance tester is adopted to ensure its output power, load carrying capability and interference rejection capability.

Preferably, in the above technical solution, the control chip of the intelligent control and data processing unit employs a PLC module of the SIMATICS7-1200 model.

The following detailed description is made with reference to the accompanying drawings

As shown in fig. 1, the motor insulation testing device and the driving motor are directly controlled by the intelligent control and data processing unit, and the intelligent control and data processing unit feeds back various conditions of the current equipment to the central control unit of the intelligent control and data processing unit in real time, so that the conditions are displayed and operated by the man-machine interaction unit.

As shown in fig. 2 and 3, for the utility model discloses a star connection electric circuit, triangular connection electric circuit, including six terminals U on wire, auxiliary relay KA1 ~ 7, contactor KM1, motor insulation tester, driving motor and the motor₁、V₁、W₁、U₂、V₂、W₂。

As shown in fig. 4, when the insulation test of the driving motor is started, KM1 and all other switches are disconnected, and then insulation resistance value tests between windings and between the windings and the housing are respectively performed.

If the insulation resistance test between the windings is required (taking the insulation resistance test between the winding U and the winding W as an example), the KA3 and KA4 are required to be attracted, other intermediate relays are disconnected, and the insulation resistance value R between U, W at the position of 15 seconds and 60 seconds is measured_UW15And R_UW60And then the KA1, KA3 and KA7 are attracted, other intermediate relays are disconnected, and the discharging operation is carried out.

If the insulation resistance test between the winding and the casing is needed (taking the insulation resistance test between the winding U and the casing as an example), the KA5 and KA7 are needed to be attracted, other intermediate relays are disconnected, and the insulation resistance values R of the U to the ground at 15 seconds and 60 seconds are measured_UE15、R_UE60Then the current is absorbed into KA3 and KA7, other intermediate relays are disconnected, and the discharging operation is carried out.

Wherein, if the insulation resistance test between the three pairs of windings and the insulation resistance test between the three windings and the case are completed, the PLC module judges six groups of data, and firstly judges R_UW60、R_UV60、 R_WV60、R_UE60、R_VE60、R_WE60Whether all are greater than 10M omega, and then judging R_UW60、R_UV60、 R_WV60、R_UE60、R_VE60、R_WE60Are each independently of R_UW15、R_UV15、R_WV15、R_UE15、R_VE15、R_WE15If the ratio is larger than 1.3, if the conditions are met, the intelligent control and data processing unit sends a test safety signal to an upper computer in the man-machine interaction unit, and if at least one condition is not met, the intelligent control and data processing unit sends a fault alarm signal to the upper computer in the man-machine interaction unit.

If the intelligent control and data processing unit receives a test safety signal sent by the motor insulation testing device, an opening instruction is sent to the driving motor, and a motor opening signal is sent, if the intelligent control and data processing unit receives a fault alarm signal sent by the motor insulation testing device, an opening instruction is not sent to the driving motor, and a fault alarm signal is sent, and an upper computer in the man-machine interaction unit informs a worker of a central control room to overhaul the site according to the fault alarm signal uploaded by the intelligent control and data processing unit.

The utility model particularly discloses a can test and judge whether motor insulation resistance value satisfies the motor insulation test device of start standard based on the PLC module. The motor insulation tester comprises an insulation resistance tester, intermediate relays KA 1-7 and a contactor KM1, wherein the intermediate relays KA 1-7 and the contactor KM1 are sequentially and logically controlled through a PLC module, so that the motor insulation tester can measure insulation resistance values between motor windings and between the windings and a machine shell at different time points under different circuit working conditions, and whether the current driving motor state meets the motor starting standard or not is judged through internal logic calculation of the PLC module, finally, information about whether the motor can be started is sent to a lower computer (namely, a driving motor), and if a fault occurs, a fault alarm signal is uploaded to an upper computer of a man-machine exchange unit. The utility model has the advantages of insulation resistance measurement accuracy is high, insulation resistance efficiency of software testing is high, data processing and judgement are intelligent.

The utility model discloses a motor insulation testing arrangement, the DCS distributed intelligent control system can be inserted to the PLC module, combines other intelligent starting drive, realizes that a key of driving motor and water pump is opened, ensures that the machine pump can move under the intact circumstances of trouble-free.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a motor insulation test device, includes motor insulation tester, intelligent control and data processing unit, its characterized in that: the motor insulation tester is connected with electric circuit, this electric circuit includes 7 groups of auxiliary relay, the contactor, wherein on 6 terminals with driving motor respectively of the auxiliary contact of 6 groups of auxiliary relay, the motor insulation tester is connected, remaining 1 group of auxiliary relay's auxiliary contact is connected to on 6 groups of auxiliary contact and driving motor's 3 output terminals circuit, the contactor is connected with the auxiliary relay, the motor insulation tester is connected with intelligent control and data processing unit, 7 groups of auxiliary relay are connected respectively to this intelligent control and data processing unit, the main contact of contactor, and connect the man-machine switching unit.

2. The motor insulation test device of claim 1, wherein: three auxiliary contacts of the contactor are connected to 3 output terminals of the driving motor and 6 groups of intermediate relays to form a star connection electric circuit.

3. The motor insulation test device of claim 1, wherein: three auxiliary contacts of the contactor are respectively connected to 3 input terminals and 3 output terminals of the driving motor, and a triangular connection electric circuit is formed between 6 groups of intermediate relays.

4. The motor insulation test device according to any one of claims 1 to 3, wherein: the motor insulation tester adopts a BY2672 digital insulation resistance tester.

5. The motor insulation test device according to any one of claims 1 to 3, wherein: the control chip of the intelligent control and data processing unit adopts a PLC module of SIMATIC S7-1200 model.

6. The motor insulation test device according to any one of claims 1 to 3, wherein: the man-machine interaction unit comprises an upper computer.