CN2280919Y

CN2280919Y - Integrated mutual-inductor calibration device

Info

Publication number: CN2280919Y
Application number: CN 96237737
Authority: CN
Inventors: 邹栈祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-09
Filing date: 1996-11-09
Publication date: 1998-05-06
Anticipated expiration: 2006-11-09

Abstract

The utility model relates to an integrated mutual-inductor calibration device, composed of a table body (1), a calibration meter (2), a power supply voltage transformation output circuit 1, a current lifting device T [1], a standard current transformer CT [0], a voltage booster T [2], a standard voltage transformer PT [0], an electric current mutual loading box Z, a voltage mutual loading box Y and a demagnetization circuit R. The utility model is characterized in that all the component parts are arranged in the table body (1) into integration. Because the current transformation ratio of the needed standard current transformer is changed through the use of the transfer switch on a working table, the complex manual wiring problem is changed, the labor strength is lightened, and the error is also reduced.

Description

Monoblock type transducer check device

The utility model relates to a kind of electrical equipment calibration equipment, specifically, is a kind of transducer check platform.

Transducer check platform of the prior art, owing to be used for checking the high-voltage mutual inductor of voltage transformer (VT) to be placed on operational insulation difficult treatment in the platform, and when examining and determine different current transformer at every turn, the no-load voltage ratio of standard current transformer all will be carried out a people and be gone up replacing bus terminals, so checkout console and standard current transformer and standard potential transformer are separate type.And this mounting means, wiring makes mistakes easily during work, and workload is big.

The purpose of this utility model is a kind of all-in-one-piece mutual inductance calibration equipment of design, and promptly each working portion of calibration equipment all is arranged in the tester worktable, selects various working condition by the selector switch of control desk.

The utility model can adopt following technical scheme: monoblock type transducer check device, by stage body [1], tester [2], power supply transformation output circuit I, current lifting device T1, standard current transformer CTO, stepup transformer T2, standard potential transformer PTO, electric current carries case Z mutually, voltage carries case Y mutually and demagnetization circuit R forms, the output terminal of power supply transformation output circuit is connected to the secondary input end of current lifting device T1 or stepup transformer T2 by switch Ka, the secondary input end of the secondary output terminal of current lifting device T1 and standard current transformer CTO and tested current transformer Tx is connected in series, the secondary output signal of standard current transformer CTO and tested current transformer outputs to the input end of tester respectively, and the input end Txc of tester is received in the secondary of tested current transformer Tx output wherein current loading case of end 1k1 series connection again; The secondary output terminals A of stepup transformer T2, the secondary input end of X and standard potential transformer PTO and tested voltage transformer (VT) Px is connected in parallel, the secondary output signal of standard potential transformer PTO and tested voltage transformer (VT) also outputs to the input end of tester respectively, the output terminal of tested voltage transformer (VT) is in parallel with voltage load box Y, the data of the tested mutual inductor of tester [2] output, it is characterized in that above-mentioned each ingredient, all placing in the stage body [1] is an integral body, be provided with the working selecting switch Ka that checks current transformer and voltage transformer (VT) respectively in the circuit, select the K switch b of demagnetization circuit R and measurement current transformer circuit, the switch Kp of Kd and transfer standard current transformer CTO no-load voltage ratio, these switches are located on the control desk of stage body [1], and the rear wall of stage body is equipped with the High-Voltage Insulation plate.

The utility model is in technique scheme, the conduction copper rod [3] of calibrating current transformer can be set on the stage body, tested current transformer passes metal bar [3] and detects, metal bar is as the once input of tested current transformer, the one end is connected with the L1 of standard current transformer, the other end is according to detecting needs selected L2, L3, L4, L5, one of them connection of L6, L7, and their same polarities are joined.

Below in conjunction with accompanying drawing the utility model is done further explanation.

Fig. 1 is a circuit diagram of the present utility model;

Fig. 2 is the partial circuit schematic diagram of verification current transformer;

Fig. 3 is the partial circuit schematic diagram of calibration potential transformator;

Fig. 4 is the stereographic map of this calibration equipment.

As shown in Figure 1, circuit of the present utility model can be divided into following a few part: the signal Processing output circuit in power supply transformation output circuit I, current transformer testing circuit II, voltage transformer (VT) testing circuit III and the tester 2.Power supply transformation output circuit I adopts the transtat way of output commonly used; Current transformer checking circuit II comprises current lifting device T1, standard current transformer CTo, current loading case Z and the demagnetization circuit of being made up of resistance R; Voltage transformer (VT) testing circuit III comprises that stepup transformer T2, voltage standard mutual inductor PTo and voltage carry case Y mutually; The signal Processing output circuit is the circuit that adopts general general tester.

The output voltage of power supply transformation output circuit I is selected output terminal CT, PT, VT by K switch a.When being elected to CT, current transformer testing circuit II partly powers, and can check current transformer; When being elected to PT, voltage transformer (VT) testing circuit III partly powers, and can check voltage transformer (VT); When being elected to VT, the exportable voltage of this end is to the outer consuming parts of this device, such as being used for external current lifting device or stepup transformer check mutual inductor.

In circuit diagram shown in Figure 1, the output of the secondary of standard current transformer CTo is provided with the K switch p of conversion CTo no-load voltage ratio, and when detecting current transformer, switch must forward on the position identical with tested current transformer ratio, promptly forwards a K1-K12 end wherein to; When using external standard current transformer to detect, this switch must forward the KO end to.1K1 on the stage body, 1K2 end is connected respectively with K1, the K2 secondary output terminal of tested current transformer.During the verification current transformer, forward K switch b to B1 earlier, Kd forwards D1 to, and the demagnetization mode is worked, and 1K1,1K2 end is connected respectively with the demagnetizing resistance two ends, and tested current transformer is demagnetization earlier; K switch b receives B2 then, and Kd forwards D2 to, is metering system work.At this moment, the L1 of standard current transformer CTO is connected to an end of the conducting metal rod 3 that is fixed on the worktable, the other end of metal bar 3 selects one of them terminals of L2-L7 to connect according to the needs of tested current transformer, tested current transformer is through on the metal bar 3, and metal bar is as the once input of tested current transformer.The operating circuit that detects current transformer as shown in Figure 2, T1 is a current lifting device, CTO is a standard current transformer, Tx is tested current transformer.The L1 that once imports of standard current transformer CTO connects with the once input L1 of tested current transformer Tx, the L2 of the L2 of standard current transformer CTO and tested current transformer Tx connects with the output of current lifting device T2 secondary respectively, the secondary output terminal K1 of standard current transformer CTO connects with the secondary output terminal K1 of tested current transformer Tx end, and receives the input end K of tester 2 by switch; The secondary output terminal K2 of standard current transformer CTO receives the input end Toc of tester 2; Behind the secondary output terminal K2 of the tested current transformer Tx end series load case Z, receive the input end Txc of tester 2 by K switch d, and Txc is with casing ground connection.The signal of tester [2] input through processing of circuit, is exported the detection data of tested current transformer.

In addition, in Fig. 1 circuit diagram, also having 2 winding line end 2K1 and 2K2,3K1 and 3K2,2K1 and the 2K2 can external standard current transformer, be to be used for standard current transformer CTO in the work for inspection platform; And 3K1 and 3K2 can external standard current transformers, replace the standard current transformer CTO in the worktable to detect tested current transformer.

In circuit diagram shown in Figure 1, A, X, a, x are the terminals on the device, and once input A, the X of tested voltage transformer (VT) and secondary output a, x are connected on respectively on these terminals.Stage body 1 is provided with ganged switch Kc, and when stepup transformer T2 in using worktable and the tested voltage transformer (VT) of standard potential transformer PTo verification, ganged switch Kc receives the C1 measuring junction.Its working circuit diagram as shown in Figure 3.PTo is a standard potential transformer, and Px is tested voltage transformer (VT), and T2 is a stepup transformer, and Y is tested voltage transformer secondary load box with voltage.A, the X end of standard potential transformer PTO and tested voltage transformer (VT) Px connects the secondary output terminal of stepup transformer T2 respectively, the a of standard potential transformer end is imported with a that connects tester 2 after a end of tested voltage transformer (VT) connects, the x of standard potential transformer PTo receives the Top input end and the ground connection of tester 2, the Txp input end of the x termination tester 2 of tested voltage transformer (VT) Px, but voltage load box Y is connected in parallel on secondary a, the x two ends of tested voltage transformer (VT) Px by terminals Y1 shown in Figure 1, Y2 wiring.Behind tester 2 input signals,, export the data of tested voltage transformer (VT) through processing of circuit.When stepup transformer outside using worktable and the tested voltage transformer (VT) of standard potential transformer verification, ganged switch Kc receives the C2 measuring junction, at this moment, must external stepup transformer and standard potential transformer could detect, among Fig. 1, terminals Txp ', a ', Top ' can external stepup transformer and standard potential transformer detection usefulness.

In the present embodiment,, the High-Voltage Insulation plate of making of resene is housed behind stage body for worktable under high pressure insulate.

The utlity model has following advantage:

Owing to utilize the change-over switch on the workbench, change the electric current no-load voltage ratio of required standard current transformer, Change complicated artificial wiring problem and alleviated labour intensity, also reduced mistake.

Claims

1. monoblock type transducer check device, by stage body [1], tester [2], power supply transformation output circuit I, current lifting device T1, standard current transformer CTO, stepup transformer T2, standard potential transformer PTO, electric current carries case Z mutually, voltage carries case Y mutually and demagnetization circuit R forms, the output terminal of power supply transformation output circuit is connected to the secondary input end of current lifting device T1 or stepup transformer T2 by switch Ka, the secondary input end of the secondary output terminal of current lifting device T1 and standard current transformer CTO and tested current transformer Tx is connected in series, the secondary output signal of standard current transformer CTO and tested current transformer outputs to the input end of tester respectively, and the input end Txc of tester is received in the secondary of tested current transformer Tx output wherein current loading case of end 1k1 series connection again; The secondary output terminals A of stepup transformer T2, the secondary input end of X and standard potential transformer PTO and tested voltage transformer (VT) Px is connected in parallel, the secondary output signal of standard potential transformer PTO and tested voltage transformer (VT) also outputs to the input end of tester respectively, the output terminal of tested voltage transformer (VT) is in parallel with voltage load box Y, the data of the tested mutual inductor of tester [2] output, it is characterized in that above-mentioned each ingredient, all placing in the stage body [1] is an integral body, be provided with the working selecting switch Ka that checks current transformer and voltage transformer (VT) respectively in the circuit, select the K switch b of demagnetization circuit R and measurement current transformer circuit, the switch Kp of Kd and transfer standard current transformer CTO no-load voltage ratio, these switches are located on the control desk of stage body [1], and the rear wall of stage body is equipped with the High-Voltage Insulation plate.

2. monoblock type transducer check device according to claim 1, it is characterized in that stage body is provided with the metal bar [3] of calibrating current transformer, tested current transformer passes metal bar [3] and detects, metal bar one end is connected with the L1 of standard current transformer, the other end is according to detecting needs selected L2, L3, L4, L5, one of them connection of L6, L7, and their same polarities are joined.