SU490045A1 - Device for detecting DC potentials on a ground loop - Google Patents

Description

one

The invention is related to electrical measuring equipment and is used to automatically control the absence of closure and insulation resistance on the case of busbars of DC sources.

A device is known for automatically monitoring the absence of an interlocking on the case of busbars of DC sources containing, its multivibrator, clock driver, register, sensitive control element in the form of a current relay, control elements of the device, control circuit switching elements, light and sound. alarm and information output to the printing device.

However, such a device is characterized by the absence of constant automatic monitoring of the presence of DC voltage potentials on the ground loop, as well as the POSSIBILITY1) occurrence of the B1B defect in the operation of the tested devices due to the influence of the monitored voltage on the tested systems.

The purpose of the invention is the implementation of continuous automatic control and elimination of the influence of voltage control signals on the systems being tested.

For this, two electrolytic capacitors are introduced into the proposed device, which are connected in such a way that the ilus cover of the cell is connected to the negative blocking of another capacitor, the plus plate of which is connected to the first cover of the first, and two adjustable voltage dividers. The middle point of the voltage dividers is connected to the housing through the winding of the floor 1) iso-relay, serially connected normally closed contacts of current relays, electrolytic capacitors and normally closed contacts of the self-control relay, as well as voltage dividers are connected to the multi-bus and non-switch1 to the plus bus of the source and nano-stationing.

The drawing shows the electrical circuit diagram of the device.

The device consists of two dividers (exact and coarse), which are assembled on fixed resistors 1 and 2 and four on each 1 H1) 1x 3–6 resistors. i.h resistors 7. 8, 9. 10, polarized relay II, current | 1 relay 12, 13. relay 14 self-control, switch 15, used for connecting sirens and non-switches 16, 17. electrically-controlled capacitors 18, 19 and the capacitor 20, the light panel on the lamps 21-24, the control lamp 25, which unlocks the button 26 on the switch 27 with the middle position. Functional1) But the device can be divided into a sensitive circuit containing

dividers and polarizers, polarizer relays, electrolytic conductors and a capacitor 20, switches 27 and 17; executive circuit, including 1, current current relays, resistors 7, 8, 9, switch 15, light panel 1 switch pa sirei; a self-monitoring circuit containing a relay 14, a switch and a resistor 10.

The device) aE5ot follows the following way.

In the case of contact with the housing, and, consequently, with the common ground loop of the potential of positive or minus polarity, a current flows in the circuit of the sensitive circuit. The direction of the current depends on the sign of the potential. When the potential is positive, the current flows from the potential point of contact through normally closed contacts 1 and 2 of relay 14, capacitors 18, 19, normally closed contacts 8 and 12 of relay 13, normally closed contacts 8 n 12 of relay 12, winding of polarized relay 11, resistors 2 , 4, or 2, 6, depending on the position of the switch 27, the normally closed contacts of the button 26 and through the negative terminal of the polar plug to the source.

At the minus potential, the current flows from the source through the positive contact of the polar plug, normally closed contacts of button 26, closed contacts of 11 switch 16, resistors 3, 1, or 5, 1 depending on the switch 27, winding across relay, normally closed contacts 8 n 12 relays 12, normally closed contacts 8 and 12 relays 13, capacitors 18, 19, normally closed contacts I and 2 relays 14 on the case (common ground loop) to the place of negative potential.

A polarized relay is triggered by a short circuit that closes either the left contact and the dependence on the voltage of the current, I interlock it; it is in the winding. 4ei) C3 closed loop of polarized relay depending on the sign of the potential on the relay 12 or 13 of the executive circuit through the resistor 7 enters. The relay is activated and the contacts make the following switchings: by contacts 2, 9 the relay is self-blocked; pins 8, 2 disconnect the sensitive circuit from the ground loop; pins 4, 10 commutes to light displays; contacts 5. 11 commutes +27 in on CHpeisy; coitgisgs 7, 12, capacitors 18 and 19 are set. self-discharge through resistors 8 nl 9.

The siren indicates the amount of potential loss on the body (ground loop), and the lights: ablo indicate the sign of this potential ;;.

It is discovered by the method of knockdown. the consumer or the source itself, in which the potential on the housing occurred.

Exclusion of the consumer or elimination in the consumer of the reason for the potential of the potential V to the housing is determined by pressing the button 26 "Unblock. In this case, the buttons and ;; the buttons and the OTrivcKaiiiiii buttons light lights

Do not light: i; the siren does not detect the SOUND S11G11;: LA, G: a: y,) TY1Zha1; -1 reasons for noTeiu;:; /: i i-i body serregy is disconnected n; 1kl1chatchats:; and KOiTpo; F: j in this pile of Gyadsts: n sl tpsy;

In the isot (:) bean; -a MINUSO sweat; -:,;; 1L constant nio ii / j; VRS ::,; e; but specially taken out dns on the hull. When working with the device and floor (); (hitting the clue 16 by setting; and; c; -1 turns to position a, c / key with; sensitive iio source cable; y noi-j :: dial. B danpol; the device monitors the iio positive potential.

Resistor 7 for decreasing the count: mut; 1m; ke1; and 27 and ds; values of 24 s, .pus-to-Commutation by a switch of a polarized relay, and that; c / ke stabilizes the operation of the relay 12 and 13.

Capacitor 20 is used to delay the polarized relay to - the moment of release of the body 12 or 13.

B: .1 Homes to make a call ;: The device is positive or linguistic sensitive, the circuit is disconnected from the loop ;; grounding, based on the considerations of exclusion of any kind; and there were influences of the device on the co gory system; as well as providing the possibility of reducing the charge of capacitors io and 9.; az: d them at pseudo-and-x in cxe: .. t: go through resistors 8 or P. Resistors 1 and 2 are evil :: peg-lirovki: .1I in chuzstzptelyy cxi, -:, :: j.

Checking the normality of the device p () from the wizard; -yrc by clicking on the chain of the switch 17. When it is pressed to the "--- or" position, the input of the circuit is passed through the resistor 10 through the input circuit; or Miyusozoy potential from the co-opirulyugo source. Odvremen110 with this gives --27 to the relay 1 3, which is a co-tact, ;; ; ;; 2 breaks tszp, (osd1 || 1I1oi:, UK; CHOOSES: e., Yu scheme with obiiU i kontu, ;;.,. Sajc: U.:; l5;: skl: ochgnyi get:;: ih: ;;; w /; a: -: ;;; aa I; :-() and; and yourself: -; |) Itr (1.1e.

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Aijin coB () nc; a-: j a,.: A: .- ir., J.::j:4 ;,: j .-. A.ia peg. Il is a voltage divider, and the middle point of the dividers the voltage is connected to the housing through the winding of a polarized relay, serially connected normally closed contacts of current relays, electrolytic 6 and 6 single-nerodally closed capacitors to the self-control relay, and the dividers are connected to the minusvon bus and through the switch to the positive source of the constant voltage.