CN201060232Y

CN201060232Y - current mutual inductor testing apparatus for intelligent electrical apparatus release

Info

Publication number: CN201060232Y
Application number: CNU200720096526XU
Authority: CN
Inventors: 史祺; 王铁镰; 徐卫生; 张远矩; 高艳
Original assignee: Tianjin Baili Electronic Co Ltd
Current assignee: Tianjin Baili Electronic Co Ltd
Priority date: 2007-06-28
Filing date: 2007-06-28
Publication date: 2008-05-14
Anticipated expiration: 2017-06-28

Abstract

The utility model relates to a current transformer test unit applied to an intelligent release. The device comprises a constant-current source device able to perform coarse and fine adjustment, a multiple-type transformer test device and also motors for regulating a voltage regulator in the constant-current source device, a current-stabilization control circuit and a display device, wherein, a current-raising transformer of the constant-current source device is just the directly-connected current-raising transformer in the multiple-type transformer test device; wiring terminals in the multiple-type transformer test device for connecting two ends of a tested transformer are connected with the display device and the input end of a computer; the current-stabilization control circuit comprises a control circuit controlling two voltage-regulating motors to make normal and reverse rotations; the output end of the computer outputs on-off signals, which are transmitted to the voltage-regulating motors via a normal-reverse rotation control circuit for the voltage-regulating motors. The utility model can perform tests on a plurality of groups of transformers and automatically stabilize the current within the range of 0-5000A with the current-stabilization accuracy of three percent or so. A plurality of groups of output voltage values in real-time test of a plurality of groups of transformers are directly displayed on a touch screen, eliminating errors caused by artificial measurement and adjustment.

Description

Current mutual inductor for intelligent electrical apparatus release

Affiliated technical field

The utility model belongs to a kind of pick-up unit that detects the current transformer performance parameter, particularly relates to a kind of current mutual inductor for intelligent electrical apparatus release that detects intelligent electrical apparatus release mutual inductor parameter.

Background technology

The current transformer that is used for intelligent electrical apparatus release in the present known production need carry out the detection of output voltage parameter, carried out this test in the past, it generally is test current by the given tested current transformer of mode of pressure regulation manually, artificially adopt multimeter to measure the secondary voltage of this current transformer then, can cause excessive personal error so on the one hand, be difficult to guarantee the high-precision test result; Bring some potential safety hazards also on the other hand the test testing staff.

Summary of the invention

But the utility model provides a kind of current mutual inductor for intelligent electrical apparatus release of high Precision Detection intelligent electrical apparatus release Current Transformer performance parameter for solving the technical matters that exists in the known technology.

The technical scheme that the utility model is taked for the technical matters that exists in the solution known technology is: it includes the constant-current source device and the multiple model mutual inductor test unit that can carry out coarse adjustment and fine setting, also includes to be used for regulating pressure regulation motor, current stabilization control circuit and the display device that described two pressure regulators that carry out the constant-current source device of coarse adjustment and fine setting move; Rising current transformer in the described constant-current source device that carries out coarse adjustment and fine setting is exactly the direct connecting type rising current transformer in the multiple model mutual inductor test unit; The connection terminal at the tested mutual inductor of the connection two ends in the multiple model mutual inductor test unit connects the detection signal input end and the input end and computer of described display device; Described current stabilization control circuit includes the control circuit that two pressure regulation motor of control are done rotating, and the control circuit that the make-and-break signal of the output terminal output of described computing machine is done rotating by described two pressure regulation motor passes to the pressure regulation motor.

The utility model can also adopt following technical measures:

Described display device is a touch-screen, and computing machine links to each other with touch-screen by communication bus.

Described computing machine can be single-chip microcomputer, industrial computer or PLC.

Advantage and the good effect that the utlity model has are: owing to adopted ZL200720096035.5 " multiple model mutual inductor test unit " and ZL200720096036.X " can carry out the constant-current source device of coarse adjustment and fine setting " so this testing table can be tested many groups mutual inductor simultaneously, testing table adopts Single-chip Controlling, by touch-screen given electric current is set arbitrarily, automatic steady current in the 0--5000A scope, precision of steady current is ± 3%, need not the artificial manual adjustment voltage of operator; Detect many groups magnitude of voltage of many group mutual inductors output simultaneously in real time, and be presented on the touch-screen, need not the operator artificially measure, eliminated artificial measurement and adjusted the error of bringing.

Description of drawings

Fig. 1 is a general structure synoptic diagram of the present utility model;

Fig. 2 is the circuit theory diagrams among Fig. 1.

Embodiment

As shown in Figure 1, casing A, display device B and test fixture C.In the described casing A constant-current source device is housed; Described display device B is by Single-chip Controlling; Described test fixture C directly is fixed on the output copper bar of direct connecting type rising current transformer.

Be illustrated in figure 2 as circuit theory diagrams of the present utility model, comprise main circuit and control circuit, wherein main circuit mainly comprises input power control switch MC1, MC2, A.C. contactor J0, electronic adjustable constant-flow source, current transformer L and display device TA.Described display device TA mainly is made up of control core single-chip microcomputer and touch-screen.Described power control switch MC1 is a main power switch, and MC2 is the control power switch, the break-make of A.C. contactor J0 control major loop.External power source passes through constant current source and direct supply POWER, display device TA in the control circuit and the A.C. contactor J0 coil in J0 and the MC2 supply main circuit respectively behind MC1, current transformer L feeds back to single-chip microcomputer among the display device TA with the electric signal that measures, come out through the actual current value in the calculating acquisition major loop and by screen displaying by single-chip microcomputer again, the electric signal of same tested mutual inductor also can finally be come out by screen displaying by the calculating of single-chip microcomputer, and the communication between described single-chip microcomputer and the touch-screen is finished by the RS232 bus.Thereby can also control two pressure regulation motor M1, the M2 rotating of the break-make control constant current source of JQ1, JQ2, JQ3 and four relays of JQ4 and MOS1, MOS2 as the single-chip microcomputer of control circuit core by the break-make of P1-P6 output port, the final current stabilization of realizing, wherein required direct supply is provided by direct supply POWER.

Touch-screen model: LJD-ZN-3200 adopts single-chip microcomputer model: ATMEL128

Claims

1. current mutual inductor for intelligent electrical apparatus release, it includes the constant-current source device and the multiple model mutual inductor test unit that can carry out coarse adjustment and fine setting, it is characterized in that: the pressure regulation motor, current stabilization control circuit and the display device that also include two pressure regulators actions that are used for regulating the described constant-current source device that carries out coarse adjustment and fine setting; Rising current transformer in the described constant-current source device that carries out coarse adjustment and fine setting is exactly the direct connecting type rising current transformer in the multiple model mutual inductor test unit; The connection terminal at the tested mutual inductor of the connection two ends in the multiple model mutual inductor test unit connects the detection signal input end and the input end and computer of described display device; Described current stabilization control circuit includes the control circuit that two pressure regulation motor of control are done rotating, and the control circuit that the make-and-break signal of the output terminal output of described computing machine is done rotating by described two pressure regulation motor passes to the pressure regulation motor.

2. current mutual inductor for intelligent electrical apparatus release according to claim 1 is characterized in that: described display device is a touch-screen, and computing machine links to each other with touch-screen by communication bus.

3. current mutual inductor for intelligent electrical apparatus release according to claim 1 is characterized in that: described computing machine can be single-chip microcomputer, industrial computer or PLC.