Embodiment

Illustrate in detail the utility model below in conjunction with drawings and Examples, protection domain of the present utility model is not limited to following examples.

The relay checking seat that the utility model provides, its structure as shown in Figure 1, main body is epoxy package 1, the upper surface of epoxy package forms guidance panel 2, guidance panel 2 is provided with ship type switch 10, additional equipment binding post 6, feedback connection post 7, pilot lamp A11, pilot lamp B9, relay base A3, relay base B4 and relay base C5, pilot lamp A11 is green, pilot lamp B9 is red, each normally opened contact of 3 relay bases is connected successively by wire, each normally closed contact of each relay base is in parallel successively by wire, epoxy package inside is provided with the battery 8 be connected with pilot lamp by wire, all wires are all arranged in the guidance panel back side and are encapsulated in epoxy package inside,

Relay base connects different assembly by wire and forms different functional loops, its functional loop comprises coil power loop, backfeed loop, work instruction loop three, contact part, be specially: 1) coil power loop: connect additional equipment binding post 6 by the coil contact of relay base by wire and form, as shown in Figure 2, inject operation voltage for additional test apparatus to measured relay, additional test apparatus is by additional equipment binding post Z1 and Z2 switch-on coil electric power loop, 2) backfeed loop: being connected by each normally opened contact of relay base successively by wire and connected feedback connection post 7 is formed, as shown in Figure 3, feed back to additional display device for actuating of relay situation is converted to switching value, additional display device accesses backfeed loop by feedback connection post F1 and F2, 3) contact work instruction loop: each normally opened contact of relay base is connected successively by wire and connected pilot lamp A and current-limiting resistance formation normally opened contact testing circuit, each normally closed contact is in parallel successively and connect pilot lamp B and current-limiting resistance forms normally closed contact testing circuit by wire, normally opened contact testing circuit is with normally closed contact testing circuit and connect and to be connected in series with battery and switch by wire and form contact and work and indicate loop, as shown in Figure 4, for reflecting relay normally open contact and normally closed contact action situation, in the non-excitation situation of relay, normally closed contact closes, pilot lamp B is bright, in relay excitation situation, normally closed contact disconnects, pilot lamp B goes out, normal opened contact closes, pilot lamp A is bright.

In actual use, each element all passes through 2mm ²single core copper cash connects, and the concrete mode of connection of three functional loops is:

1) coil power loop: be connected to additional equipment binding post by after the parallel connection of 3 Relay base coil contacts, by 13, of relay base A No. 14 terminals, 13, No. 16 terminals of relay base B, A1, B1 terminal of relay base C are connected in parallel on Z1, Z2 terminal of relay coil power input respectively; Protective calibration instrument injects the voltage of change to measured relay by relay coil power input;

2) backfeed loop: the normal opened contact at each Relay base back side is connected, relay feedback contact output terminal will be connected to again after 3 pairs of extension line parallel connections, first Relay base relay base A, relay base B, relay base C normal opened contact are connected respectively, then No. 5 terminals of relay base A No. 5 terminals, relay base B, No. 14 terminals of relay base C are all connected to feedback connection post F1; No. 41 terminals of No. 12 terminals of relay base A, No. 12 terminals of relay base B, relay base C are connected to feedback connection post F2.Protection check meter feeds back contact output terminal feedback quantity by relay, to judge actuating of relay state, and the start and stop of Control protection tester, operation of recording voltage and return voltage;

3) signal designation loop: instruction loop, normal opened contact position and instruction loop, normally closed contact position;

1. normal opened contact position instruction loop: be connected in series 3V battery in feedback contact loop, ship type switch QF, current-limiting resistance and LED light (green) are as normal opened contact instruction loop, by relay base A No. 12 terminals, No. 12 terminals of relay base B, No. 41 terminals of relay base C are connected to the positive pole of 3V battery respectively, the negative pole of 3V battery is connected in series ship type switch QF successively, current-limiting resistance, LED light (green), and then be connected to No. 5 terminals of relay base A, No. 5 terminals of relay base B and No. 14 terminals of relay base C, in this loop, if relay loss of excitation under normal circumstances, loop is obstructed, green light extinguishes, if relay excitation, then normal opened contact closes, and loop conducting green light lights, if green light is not bright after relay excitation, then shows to exist normal opened contact and fail normally closed abnormal conditions,

2. normally closed contact position instruction loop: respectively by 1,2,3, of relay base A No. 4 terminal, 1,2,3, No. 4 terminal of relay base B, LED light (redness), current-limiting resistance, ship type switch QF, 3V battery is connected in series after 12,22,32, No. 42 terminal short circuits of relay base C, then No. 12 terminals of relay base A, No. 12 terminals of relay base B, No. 41 terminals of relay base C are connected to, under normal circumstances, normally closed junction closure during relay loss of excitation, red light lights; During relay excitation, normal opened contact closes, and normally closed contact disconnects, and red light extinguishes.If red light is not bright in relay loss of excitation situation, then illustrate that this relay normally closed contact is abnormal; If red led does not extinguish after relay excitation, then relay normally open contact action message is described, and normally closed contact fails reliable separation.

The relay checking seat that the utility model provides is applicable to 6 kinds of model relay checkings such as OMRON MY4NT, Schneider RXM4AB2P7, Schneider RXM4AB1MD, CARA-Y0AAD, CS-ZO6AB, CSD4, can only verify a relay when carrying out relay checking at every turn.Using method is as follows:

1) protective calibration instrument voltage source UA, UB are connected to binding post Z1, Z2 of relay coil power input, binding post F1, F2 of relay being fed back contact output terminal are connected to protective calibration instrument feedback contact place, corresponding Relay base will be inserted, the ship type that closes switch QF by verification relay;

2) observe whether LED light (redness) is bright judges normally closed contact whether fault;

3) starting protection tester injects 0V to UN voltage to measured relay, and judges normally-open normally-close contact whether fault according to LED light after relay excitation (green) and LED light (redness) situation of change;

4) meter relay operation voltage and return voltage, relay health condition judges with reference to following table: