CN201352253Y

CN201352253Y - Testing box for electrical protection tests

Info

Publication number: CN201352253Y
Application number: CNU2008202267568U
Authority: CN
Inventors: 张昌民
Original assignee: YANKUANG LUNAN CHEMICAL FERTILISER PLANT
Current assignee: YANKUANG LUNAN CHEMICAL FERTILISER PLANT
Priority date: 2008-12-24
Filing date: 2008-12-24
Publication date: 2009-11-25
Anticipated expiration: 2018-12-24

Abstract

The utility model relates to a testing box for electrical protection tests, which comprises a box body, wherein a voltage regulator, a current transformer and a rectifier are arranged in the box body, a plurality of wiring terminals, a mechanical millisecond meter, a voltage regulator rotating handle, a plurality of ganged switches, two indicator lamps and a fuse are respectively arranged on a front panel of the box body, one end of the rectifier is connected with the wiring terminals while the other end is connected with a ganged switch KII, the voltage regulator, a ganged switch KI, the fuse and a power source sequentially via wires, one end of the current transformer is connected with the wiring terminals while the other end is sequentially connected with the ganged switch KII, the voltage regulator, the ganged switch KI, the fuse and the power source sequentially via wires, and one end of the mechanical millisecond meter is connected with a ganged switch KIII and the wiring terminals sequentially via wires while the other end is connected with a ganged switch KIV, the ganged switch KI, the fuse and the power source. The testing box has the advantages of compact structure, convenient operation and saving time and the like.

Description

Electronic Protection experimental test case

Technical field

The utility model relates to a kind of test box, especially a kind of Electronic Protection experimental test case.

Background technology

The present relay protection instrument major defect of buying in use:

1. cost an arm and a leg.

2. when surveying relay actuation time, poor anti jamming capability.

3. inconvenient in branch, combined floodgate test to isolating switch, the strong height of work, efficient is low.

Along with science and technology development, the defencive function of equipment is more and more complete, and experiment work is also more and more important.In the process of the test, the millisecond meter Measuring Time of test usefulness is very unstable again at the scene for the relay protection instrument of buying.

Summary of the invention

The utility model is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of compact conformation, easy to operate, save time, increase work efficiency, safe and reliable Electronic Protection experimental test case.

The purpose of this utility model is to adopt following technical proposals to realize: a kind of Electronic Protection experimental test case, comprise casing, be provided with pressure regulator, current transformer and rectifier in the casing, be respectively equipped with some binding posts, a mechanical millisecond meter, pressure regulator turning handle, some ganged switches, two pilot lamp and an insurance on the casing front panel; Rectifier one end is connected with binding post, and other end via line is connected with ganged switch KII, pressure regulator, ganged switch K I, insurance and power supply successively; Current transformer one end is connected with binding post, and other end via line is connected with ganged switch K II, pressure regulator, ganged switch K I, insurance and power supply successively; Machinery millisecond meter one end via line is connected with ganged switch KIII, binding post successively, and other end via line is connected with ganged switch KIV, ganged switch K I, insurance and power supply successively.

The utlity model has following advantage:

1. the equipment after installing is more concentrated, and structure is tightly beaten, and is convenient to operation.

2. external cabling is few, but convenient lead-in wire big time saver.As: make overcurrent relay, voltage relay, the outside need only connect one group of power lead, a group node line and one group of electric current (voltage) lead-in wire and reometer (voltage table).As: do the breaker tripping and closing work of isolating switch, need only be connected on closing circuit respectively by external voltage table A, the B of will exporting in parallel, get final product with sub-gate circuit with switch (input end).

3. guidance panel output terminal all has simple memonic symbol, knows the effect of its output, switch at a glance, and is easy to operate.

4. this equipment adopts the simplest protection, and as the protection of control box, promptly fuse is as short circuit and overload protection.

When doing experiment can, joint wins a large amount of time.

Description of drawings

Fig. 1 is the utility model circuit theory diagrams;

Fig. 2 is the checking circuit schematic diagram to DC voltage relay;

Fig. 3 is the checking circuit schematic diagram to the alternating voltage relay;

Fig. 4 is the checking circuit schematic diagram to ac current relay;

Fig. 5 is the test circuit schematic diagram to the test contacts normal opened contact;

Fig. 6 is the test circuit schematic diagram to the test contacts normally closed contact;

Fig. 7 is separating brake, the combined floodgate hookup schematic diagram of test both opens device;

Fig. 8 is a test box front panel synoptic diagram;

Wherein 1. power lights 2. insure, 3. casing portable lamp, 4. pressure regulator, 5. ganged switch K II, 6. rectifier, 7. current transformer, 8. mechanical millisecond meter, 9. ganged switch KIII, 10. ganged switch KIV, 11. ganged switch K I, 12. binding posts, 13. pressure regulator turning handles.

Embodiment

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

Among Fig. 1, Fig. 8, be provided with pressure regulator 4, current transformer 7 and rectifier 6 in the casing, be respectively equipped with the mechanical millisecond meter of five pairs of

posts

12,8, pressure regulator turning handle 13, four ganged switches, two

pilot lamp

1 and 3 and insurances 2 on the casing front panel; Rectifier 6 one ends are connected with the output of binding post 12 direct currents, and other end via line is connected with ganged switch K II 5, pressure regulator 4, ganged switch K I11, insurance 2 and power supply successively; Current transformer 7 one ends exchange output with binding post 12 and are connected, and other end via line is connected with ganged switch K II 5, pressure regulator 4, ganged switch K I 11, insurance 2 and power supply successively; Machinery millisecond meter 8 one end via line are connected with ganged switch KIII9, the input of binding post 12 contacts successively, and other end via line is connected with ganged switch KIV10, ganged switch K I 11, insurance 2 and power supply successively.Be provided with power light 1 at power supply with between insuring 2, between ganged switch K I 11 and pressure regulator 4, be provided with casing portable lamp 3.

Principle of work of the present utility model is as follows:

1. to the verification of DC voltage relay:

As shown in Figure 2, insert power supply ganged switch K I 11 is closed, close on the ganged switch K II 5, through rectifier 6 output adjustable DC voltage.

2. to the verification of alternating voltage relay:

As shown in Figure 3, insert power supply, ganged switch K I 11 is closed, close under ganged switch K II 5 switches, the ac output end button can directly be exported adjustable alternating voltage.

3. to the verification of ac current relay:

As shown in Figure 4, insert power supply, ganged switch K I 11 is closed, close under ganged switch K II 5 switches, through current transformer 7, AC great current output terminal is directly exported adjustable alternating current.

4. to test contacts test actuation time:

1) as the test to normal opened contact: as shown in Figure 5, KIV10 closes with ganged switch, closes on the ganged switch KIII9, and mechanical millisecond meter 8 is behind junction closure, and mechanical millisecond meter 8 stops operating, i.e. the closed action time of contact.

2) as the test to normally closed contact: as shown in Figure 6, KIV10 closes with ganged switch, closes under the ganged switch KIII9, and mechanical millisecond meter 8 is after contact disconnects, and mechanical millisecond meter 8 stops operating, i.e. the disconnection actuation time of contact.

3) as the test to the time closing normal opened contact: as shown in Figure 5, KIV10 closes with ganged switch, ganged switch K

Close (test time closing contact outage actuation time time-delay) on the III9 and can adjust ganged switch KII 5, after making the circuit breaker adhesive, with mechanical millisecond meter 8 zero clearings, stir ganged switch KII5 and make relay electric-loss, behind the junction closure, machinery millisecond meter 8 stops operating, and promptly the time of being surveyed is the closed action time between time-delay.

5. the separating brake of test both opens device, the test of closing a floodgate:

Can be that interchange, direct current carry out verification according to the separating brake of isolating switch, the type selecting of closing coil.Its principle is that input voltage is connected on relevant position on the casing (exchange output, direct current output), respectively other two groups of lines is received switching winding and closing coil gets final product.

Its on-off principle figure as shown in Figure 7.Utilize switch that its interconnector is removed, its both sides are connect the coil that separating brake, closing circuit are promptly removed in output respectively.

Concrete use operation of the present utility model is as follows:

1, to the verification of overcurrent relay:

A. the pressure regulator with this control box transfers to zero-bit, and power switch is beaten to disconnected position, inserts power supply, and power light is bright.

B. big current output terminal button is sealed in standard CT and inserts reometer according to the electric current that must be added by the school relay, open a terminated line of relay, two lines are connected on the two ends of relay respectively.Contact is received on the tested contact.

C beats symbol to normal opened contact last with control box upper contact switch.

D carries out verification according to the project of relay test to overcurrent relay.

2, to the verification of voltage relay:

A. the pressure regulator with this control box transfers to zero-bit, and power switch is beaten to disconnected position, inserts power supply.

B. according to by the voltage type of school relay, the output voltage type of selection operation case exchanges and connects on the ac output end button, and direct current connects on the dc output end button.

C. voltage table being connected in parallel on respective output voltages position and line receives on the potential winding.

D. contact is caused on the contact of this relay, select the relevant position of contact change-over switch according to this contact.As survey closure time, and select the normal opened contact position, select to connect normally closed position when surveying trip time.

E carries out verification according to the pilot project of voltage relay to change-over relay.

3, breaker tripping and closing test

B. according to by the voltage type of school isolating switch, the output voltage type of selection operation case, and special accessories is tested in breaker tripping and closing imported corresponding terminal, incorporate voltage table into, two output terminals of annex are received corresponding separating brake, closing position respectively.

C. contact is caused on the make and break contact of isolating switch.

D. the contact switch is beaten symbol to normal opened contact last, surveyed closing time, when separating brake, switch is beaten on the normally closed contact.

E. according to the pilot project of isolating switch isolating switch is carried out verification.

Guidance panel output terminal of the present utility model all has simple memonic symbol, knows the effect of its adjustment switch at a glance, and is simple to operation.As: in guidance panel, mark.(input, output are meant input, the outgoing position of this control box)

Output direct current terminal: between its two output terminal, represent it is DC voltage output with "-"

Output AC terminal: between its two output terminal, represent it is alternating voltage output with " ∽ "

Output contact switches on the terminal: write " contact "

The output AC current terminal contact adopts jumbo output terminal to be distinguished.

The power supply that is input to casing is write " power supply ",

Write corresponding sign in the relevant position of switch:

Power switch is write " power supply "

Machinery millisecond meter disable switch is write " ms stops "

The contact change-over switch is a double-throw switch, and downside marks the conventional sign of tested contact thereon: i.e. the symbol of normal opened contact

At upside, the symbol of normally closed contact

At downside.

The AC and DC change-over switch is a double-throw switch, and downside marks the symbol of output voltage thereon: promptly the upside mark "-" at switch illustrates it is direct current, and downside mark " ∽ " illustrates it is alternating voltage.

Claims

1. Electronic Protection experimental test case, comprise casing, it is characterized in that: be provided with pressure regulator, current transformer and rectifier in the casing, be respectively equipped with some binding posts, a mechanical millisecond meter, pressure regulator turning handle, some ganged switches, two pilot lamp and an insurance on the casing front panel; Rectifier one end is connected with binding post, and other end via line is connected with ganged switch KII, pressure regulator, ganged switch KI, insurance and power supply successively; Current transformer one end is connected with binding post, and other end via line is connected with ganged switch KII, pressure regulator, ganged switch KI, insurance and power supply successively; Machinery millisecond meter one end via line is connected with ganged switch KIII, binding post successively, and other end via line is connected with ganged switch KIV, ganged switch KI, insurance and power supply successively.