Switch machinery characteristic tester terminal box
Technical field
The present invention is applied to the various tests of the mid-switch of 10-35KV in the electric system, is a kind of switch machinery characteristic tester terminal box.
Background technology
What the mid-switch cubicle of current power system was comparatively popularized use is KZY-3E type switch machinery characteristic tester.This instrument is to plan as a whole design at parameters such as the few oil of 6-500kV, heavy wool, vacuum, sulfur hexafluoride breaker branch/closing time, the same period, spring speed strokes by basic model, but because the model complexity of isolating switch, the operating mechanism kind is a lot, model change is very fast, particularly the various tests of maximum mid-switch cubicles of 10-35kV are used in electric system at present, and existing setting of this instrument is difficult to satisfy requirement of experiment.
When the test job personnel used existing KZY-3E type switch machinery characteristic tester to detect at the scene, the test lead of former factory configuration was long, and the scene is used to pile up often and is intertwined, and it is very inconvenient to use, easily wrong; Lack the closing locking coil power, need several operating personnel's co-operate; Aviation plug attaching number of times is too much, causes contact malfunctioning.The switch handcart of mid-switch cubicle is pulled out the wiring propulsion trial and is caused the short circuit of switch machinery characteristic tester aviation socket pile crown core often, not to read in doing test less than certain phase test data, be exactly that short circuit damages instrument, cause service work to be interrupted, can't carry out, make maintainer's mood of working at full stretch, all be with two cover instrument to use at every turn, it is frequent to send producer to repair.
Summary of the invention
The problem to be solved in the present invention is: existing switch machinery characteristic tester carries out wiring complexity in the electrical test, and test wire easily twines, easy wrong, and short circuit, instrument, instrument splicing ear disconnect fragile repeatedly.
Technical scheme of the present invention is: switch machinery characteristic tester terminal box; terminal box is provided with at least 2 test drums, with corresponding test wire outlet, motor, earth leakage protective device, the direct current inlet wire plug of test drum with exchange the inlet wire plug; the test drum is provided with and is used for the arrangement of clutch that drum resets; described arrangement of clutch is by motor-driven; circle has test connection on the test drum; test connection connects direct current inlet wire plug and exchanges the inlet wire plug by switch, and the terminal box internal circuit all is arranged on the printed circuit board (PCB).
Further, one in the test drum is the ground wire drum, and the test connection on the ground wire drum is a ground wire.
The present invention exchanges the inlet wire plug and powers to motor, exchanges between inlet wire plug and the motor and is provided with rectifier bridge.
The preferred terminal box of the present invention is the aluminium alloy sheet shell, and the thick 2.5mm of shell, internal layer are 3mm epoxy resin dividing plate, and described test connection is 4-6 rice, 3 * 1.75 rubber annealed copper wire.
The present invention is arranged between mid-switch cubicle and the switch machinery characteristic tester, is provided with facilities such as test connection that length coordinates, earth leakage protective device.Because the electrical test terminal box is in the middle of tested equipment and the test instrumentation, thereby has played the protection instrument, the effectively variation of controlling testing equipment wiring.The probability of damage of test instrumentation is reduced greatly, and test efficacy increases significantly.
The present invention can eliminate easy wrong line in the electrical test of equipment, short circuit, and instrument, instrument splicing ear disconnect undesirable elements such as damage repeatedly; Can be at any time according to on-the-spot needs conversion connection type; Need not frequent wiring demolition, installation to tester during electrical test sockets; Reduce electrical equipment switch handcart and revolve the number of times that draws, improve experiment work efficient; Nos test wire omission in easy to carry, wiring safety, correct, the equipment.
Description of drawings
Fig. 1 is a structural drawing of the present invention.
Embodiment
As Fig. 1; terminal box of the present invention is provided with 4 test drums 1, test wire outlet 9, motor 2, earth leakage protective device 3, the direct current inlet wire plug 4 corresponding with test drum 1 and exchanges inlet wire plug 8; test drum 1 is provided with and is used for the arrangement of clutch 10 that drum resets; described arrangement of clutch 10 is driven by motor 2; circle has test connection on the test drum 1; test connection connects direct current inlet wire plug 4 and exchanges inlet wire plug 8 by switch 6, and the terminal box internal circuit all is arranged on the printed circuit board (PCB) 5.One in the test drum 1 is set to the ground wire drum, and the test connection on the ground wire drum is a ground wire.Exchange inlet wire plug 8 and give motor 2 power supplies, exchange between inlet wire plug 8 and the motor 2 and be provided with rectifier bridge 7, rectifier bridge 7 is a direct current with the AC power rectification, supplies with motor.
The preferred terminal box of the present invention is the aluminium alloy sheet shell, and the thick 2.5mm of shell, internal layer are 3mm epoxy resin dividing plate, and described test connection is 4-6 rice, 3 * 1.75 rubber annealed copper wire.
Introduce the function mode of electrical test box of the present invention below:
One, wheelbarrow switch is to insert the isolating switch that in mid-switch cubicle footing has pulley, all needs to pull it when overhauling test at every turn, is positioned on the inspection platform dolly.Wheelbarrow switch is pulled out in repeatedly propelling in test process, is for the electrical equipment locking of checking door before and after the mid-switch cubicle and the on off operating mode of wheelbarrow switch shift position locking contact.Directly be provided with direct current inlet wire plug 4 in the terminal box of the present invention, direct supply can be communicated to power supply the closing locking coil respectively by test connection, form the adhesive release, can reduce by a maintainer like this cooperates, simultaneously, simulate mid-switch cabinet expert stopping switch detects blocking coil when run location duty, and then minimizing electrical equipment switch handcart revolves the number of times that draws, raising experiment work efficient.
Two, the effect of switch 6 is switch machinery characteristic tester signals of adjusting test connection correspondence on the test drum 1, by the output signal of switch change-over switch testing mechanical characteristic instrument, need not the damage that repeatedly plug causes switch machinery characteristic tester pin hole plug.
Three, the effect of rectifier bridge 7 is that alternating current in the butted line box changes, and mainly is for motor 2 provides power supply, and the output of standby direct current.As transfer motion power, and every drum is provided with arrangement of clutch with motor 2 for the artificial pull of terminal box unwrapping wire, terminal box take-up, and test wire receives that the position can separate automatically.The function mode of motor 2 is to drive the pinion wheel dish by belt, cooperates transmission with the arrangement of clutch 10 of test drum 1, and test connection is resetted automatically fast, can not cause to pile up and twine, and motor keeps running to all drum take-ups to finish.Test is after drum all automatically resets, and terminal box is easy to carry, no test wire omission in the wiring safety, correct, equipment.
Four, earth leakage protective effect: 1, after the earth leakage protective device of switch machinery characteristic tester is malfunctioning, be used as stand-by protection; 2, link to each other with terminal box internal circuit loop, disconnect immediately once loop current surpasses setting value.Because the multifunction test terminal box is a middle device that is in test instrumentation and testing equipment, the effect of protection test instrumentation and tester's safety is played in action in advance.
Five, it was arranged on the middle device of switch machinery characteristic tester and tested equipment during terminal box of the present invention was worked at the scene, changed the bad mode of connection of 10-35kV in original tester, in the test process, the aviation plug of switching characteristic tester need not frequent plug, only need the test connection of operation terminal box, just separable switch machinery characteristic tester of open test box AC/DC inlet wire plug and terminal box.
Six, the present invention is directed to the long not only mixed and disorderly but also difficult situation that connects of field wiring that makes of original test connection, can change at any time according to the needs of field apparatus, reach people from province, laborsaving, safety, conveniently improved the test work efficiency greatly, further improved the management level of standardized work.