SU53514A1 - Device for testing isolation and finding damaged feeders - Google Patents

Description

Exquisite methods of controlling insulation in DC grids with the help of two volts, bell, sareny, lash, etc. Although it indicates the presence of a gap, "19NE in the network, but do not have interlocking, the tan as it allows in the best case to determine the correct pole,

 In order to find out the energized feeder, they alternately disconnect the feeder from the set, and the contact point of the network with the ground is thoroughly tested by the unit's wire. Due to the complexity of this method, the grounding is not immediately removed, and when it is closed, the earthen body disappears, and we are exhausted.

Grounding one of the poles often entails self-latching and shutting down contactors, starters, torlozi of a crane of oil switches and other devices, which can cause breakdowns in the electrical supply and sometimes large consumers.

The proposed device has the following advantages over existing devices for controlling insulation. It indicates a fader or unit of which there is a lock or grounding, does not require the disconnection of individual sections, disconnection of sections, etc. 1 ess, ego, it is osvol w to detect the location of the circuit with a portable device, a tray to the wire leading to the circuit. Operations are performed without stopping the unit.

Like some known devices, the proposed device consists of a BS ground fault indicator, for example, in the form of a neon lane, which is connected with a switch to the secondary windings of the transducer into the outgoing feeders of current transformers. When AC power was applied to a direct current network, then when one of the feeders on the secondary winding of the corresponding current transformer is connected to ground with a direct voltage input, and the neon lamp connected to this winding will flash, indicating damage |

The essence of the invention is that, in order to eliminate a special source of control alternating current, which is used as a capacitor, one lining of which is connected to the ground, and the second with a switch, orientally connected to it alternately to both poles of the set.

On i, I asodjaseHa is a schematic diagram of the device; in fig. 2 neon lamp switching circuit; Actually, 3 is the device diagram for controlling the isolation of non-slender dehers.

On . I through G denotes a DC generator, an NN-neon lamp, TT - a current transformer, C - a capacitor and P - a switch. This switch can be used to connect capacitor C alternately to the positive wire or to the negative; when one of the wires is connected to the z & one, current pulses will pass at the site prior to grounding oo, arising due to the discharge of the capacitor through the ground connection. If on the way to grounding include trashformator

current, then U) and a wave pulse in its secondary eilot will be shadded by an electromotive force, causing the neonotsev lamp to flash. FIG. I image achen slzg-ay grounding the negative wire. The arrow indicates the direction of the discharge current pulses.

FIG. 2 shows a diagram of the incorporation of an eons lavshn, raising it. chuzhitelitelnost. The voltage of the bias battery I is chosen to be non-slip below the ignition voltage of the neon law;

FIG. 3 represents the unfolding of circuits automatically deactivating a digital device for monitoring the insulation of several fvderov. Designations vrzh-. . n you next. Through ORZ + and ORZ- are designated the shells of two relays of a zazekvvni, supplied with contacts К РЗ + 1уЗ + КgPS- and КдРЗ-, С - capacitor, П - perekklvchatel, MI, I button, (ORR, OR, - windings auxiliary relays with contact KPj, KPg, and KR.And are the stepping finder with electromagnets and the index drum U, LE - amplifying lamp ND - neon lamps and CSL - signal lamps indicating the presence and polarity of easesh: Eni.

The device operates in the following way, when IIpi connects one of the poles of the network to the ground, one of the ORD coils shuns partially, completely, as a result of which the voltage on the second relave is generated. The relay triggers, opens its contact K and closes the contacts Kg n Open 1 leads to switching on an additional resistance relay coil circuit to prevent the ground from disappearing and for example | (eEi on this relay cap, it can return to its normal position. By contacting Kg, an appropriate sshalalny OD lamp is flashed. Contact Kj vk xga a silicon lamp W, the grid of which on one side is connected to the negative pole of the network through a large resistance, and the other third-party through a neon lamp NL.the secondary windings of transformers of the TT eye and the searcher I are connected to a point of a stetsischetre that has a gentle sweat that does not cause, however, discharge in a neon lamp. Due to the current, the 7S. lamp is locked by a negative bias on its grid. One ground with a potentiometer, the ground contact K switches on the motor K, which actuates the switch kovdeesator C is given alternately to the busbars network; The capacitor discharge pulses to pass through the zodlny message, and in the secondary winding of the current transformer, which is included in the grounded drive, in ts pulses e; e, e When one of the circuits is closed. contacts 1 receives the same power obsh5psk OR. . and OPg relays Pj and Pg, connected to each other, since normally the contact KPq of relay Rd is closed. Pulspara through intermittently contact with the EPU contact

Start by going to Elecrong W. Skatel J, which will begin to remove the ovarian brush to the conic, connected with the current transfer cable TT “When the brush reaches 5 Transformer wire on the wire, which has a connection, and I use the card and I draw on the message and I get the message and I get the message and I get the message on the wire that is connected to the cable. and the net of shmsh J3 will receive a positive potential. In the ORO Ro relay for Vits tokd, it will take its contact KR to disconnect, Yoakagel will stop on the UG Zzagagel. It will be possible to identify the number of the grounded wire - B with the transmission: readings for the distance can be ki 3j turn on the power supply unit E of the second step mechanism, equipped with a pointer V. 2. When the damaged EP is oyshechek, the device if there is no jamming in the other fwdders will return to normal power supply, the earthing relay will release and pull out the signal arm of the dvngage M meter of the external lamp. In the event that it isn’t immediately eliminated, it is provided with a self-locking Kj button that will turn the amplifier off and the AL button will keep its contacts apart until the nops are removed and the relay is earthed. act.

We have described a sample approximate form of a predagayu device. You can implement it by means of technical means, the Nalrieier, you can get by 6es with a step-by-step, and with a delay of time relays, but with a time delay, you will be able to use your device to create a relay with a time delay, but you will be able to use your device with a delay time, but you will be able to use your device with a time delay. .shm eai windings in a common sequence.

The device for ispta and isolating the search for the damaged direct current feeders of the nutea overlaying the alternating current that drives the azatal of the glazing through the included current | .o5da and control of current with a piece of condensary plug, facing one of which is zazegyena and the second is connected with a nerekn atedem of a grid connection for a locating connection of a social decontaminant e outfit

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