SU1352423A1 - Device for synthetic tests of switches for disconnection of unremedied short circuit - Google Patents

Abstract

The invention relates to electrical measuring equipment and allows to expand the scope of applications of the device. Between the current loop and the voltage loop, there are parallel-connected test switch and a unit 13 for the formation of a two-component regenerative voltage, in which capacitors 24 and 25 and reactors 18 and 19 are additionally inserted and which contain two circuits, consisting respectively of resistor 14 and two parallel connected branches. Due to this, it becomes possible to test switches in all normalized modes. .1 hp f-ly, 3 ill. OO eaten yu 4 th od sri.2

Description

The invention relates to electrical measuring equipment and can be used to test the breaking capacity of high voltage circuit breakers in disconnected short circuit modes.

The purpose of the invention is to expand the field of application by introducing additional elements into the circuit of synthetic testing and creating new connections between elements, as a result of which it becomes possible to test switches in all normalized modes.

FIG. 1 shows a diagram of a device for synthetic testing of switches; in fig. Figures 2 and 3 are a two-component regenerative voltage block formation circuit, two options.

The device for synthetic testing of circuit breakers for disconnecting an unresolved short circuit contains a current circuit 1, the states of which the test switch 7 of the alternator 2 is struck, the first reactor is called only in circuit 8 on. 3, the safety switch 4, the on-voltage switch. After disconnecting the test apparatus 5 and the disconnecting switch 7 on the reset 6. The current circuit 1 is connected to a transient voltage, to the test switch 7. Parallel - 30 meters of which are due to the structure. But the tested switch 7 was connected by the connections and the values of the elements of the block 13 to form a voltage circuit 8 consisting of the world of a two-component restoration-inductance of the short-circuited line of the flowing voltage. If test 9, the second reactor 10, the controlled switch 7, holds the discharge capacitor 11, the capacitor battery, then it disconnected this current, 12, and also the formation unit 13, if it does not, rejected the dual component restoring voltage. containing the first circuit of the first resistor 14, the second circuit of the third reactor 15, the first capacitor 16, the second resistor 17, the third circuit of the fourth reactor 18, the fifth reactor 19, the second capacitor 20, the third resistor 21, the sixth reactor 22, the fourth resist ora 23 and the third capacitor 24, as well as the fourth circuit of the fourth capacitor 25.

The device works as follows. ,

Initially, the generator. The 2 ACs are under voltage, the capacitor battery 12 is charged from a constant source of electrical energy (not shown), the safety switch 4, the disconnecting element 6 and the test switch 7 are turned on. The switching apparatus 5 and the controlled bit 11 are switched off. The test begins by turning on the switching-on apparatus 5, as a result of which, through the circuit of circuit 1, the current from source 2 through the fourth reactor 3, the standard switch 4, the switching-on device 5, the disconnecting element 6, and the test switch 7 begin to pass a short circuit current. After 0.02-0.05 s, the contacts of the tripping element 6 and the test switch are opened

7and the arc burns in them. Shortly before the passage of the short-circuit current through zero (1-2 ms), the controlled discharger 11 is triggered and a circuit current additionally flows through the test switch 7

8, the parameters of which are determined by the charging voltage and the capacitance value of the capacitor battery 12, the inductance of the short-circuited line 9 and the inductance of the second reactor 10. First, the current is switched off by the tripping element 6, as a result of switching off.

The structure and value of the elements of the two-component formation unit

regenerative stress

(Figs. 2, 3) are found from the condition of equality of the complex resistances of the following schemes: the first circuit contains a series-connected short-circuit line model and a model of the power supply system, the second circuit is a two-component restoring voltage block.

50

Claims (2)

1. An apparatus for synthetic testing of circuit breakers from disconnecting an unreleased short circuit, comprising a current loop from a series-connected shock generator, a first reactor, a safety switch, a switching device, a tripping element, and terminals for .connection of the test switch, in parallel with which a voltage circuit is connected from a series-connected inductance of a short-circuited line, a second reactor, a discharge and a capacitor battery, a regenerating voltage formation unit, the first terminal of which is connected to the first terminal for connecting the switch being tested, and the second with the second terminal for connecting the switch and the second terminal of the shock generator, the formation unit containing the second resistor and the third reactor, the first, third and fourth resistors, the first and second capacitors and the fourth reactor in parallel , characterized in that, in order to expand the application area, the third and fourth capacitors, the fifth and sixth reactors are additionally introduced into the formation unit, the formation unit comprising Two circuits, the first circuit consists of a transistor, in parallel to which a switching resistor, the second output of which is connected to the first output of the first capacitor, in parallel to which are connected in parallel the second resistor and the third reactor. u 15 20 2423 The second terminal of the first capacitor is connected to the first terminal of the second circuit, which consists of two parallel-connected branches, the first branch consists of a second capacitor, in series with which are connected parallel-connected fifth reactor and a third resistor, and the second branch consists of serially connected sixth reactor, the fourth the resistor and the third capacitor, the second terminals of the first and second branches and the second terminal of the second reactor are connected to the first plate of the fourth capacitor, the second plate to torogo vgeodom connected to said second switch for connecting the test. 2. The device according to claim 1, characterized in that the first circuit of the regenerative voltage formation unit consists of the second a branch consisting of a first resistor connected in series with the first capacitor and the third reactor connected in parallel. F ST L // qJ / 5 Editor L. Pcholinska Compiled by N, Varlamov Tehred L. Serdyukova Proofreader A. Obruchar Order 5563/45 Circulation 730 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Fir.Z