CN220440376U - Adopt circuit breaker mechanism to prevent closing circuit monitoring circuit that jumps down - Google Patents

Abstract

The utility model discloses a switch-on loop monitoring loop adopting a breaker mechanism to prevent tripping, which is characterized by comprising a breaker mechanism anti-tripping relay CJX, a first tripping monitoring loop and a second tripping monitoring loop, wherein a normally-closed contact of the first tripping monitoring relay is connected with a normally-closed contact of a relay of the second tripping monitoring loop in series, and a normally-open contact CJX4 of the breaker mechanism anti-tripping relay CJX is electrically connected with a measurement and control device. And (3) connecting a normally open contact CJX4 of the breaker mechanism anti-jump relay CJX into an open signal loop of the measurement and control device, and sending out a breaker mechanism anti-jump signal if the breaker mechanism is started in an anti-jump way.

Description

Adopt circuit breaker mechanism to prevent closing circuit monitoring circuit that jumps down

Technical Field

The utility model relates to a closing circuit monitoring loop adopting a circuit breaker mechanism to prevent tripping, belonging to the technical field of electrical equipment.

Background

In the design of a circuit breaker control loop of a transformer substation, the circuit breaker mechanism is required to be adopted preferentially to prevent tripping, and when the circuit breaker mechanism is adopted to prevent tripping, if the circuit breaker is in a closing position, the operation box is easy to close, and the opening lamp is lightened simultaneously.

The current measures are that a closing circuit monitoring loop is moved to a breaker mechanism box for monitoring, but the monitored part of the closing circuit is shortened, when the breaker is at a breaking position, if the shortened closing circuit is broken, the device cannot alarm a control loop breaking signal, an maintainer and an operator cannot find the breaking of the closing circuit at the first time, and only when the breaker is powered on, the breaker cannot be switched on, so that the power failure time and the power grid operation risk are increased.

As shown in FIG. 1, the anti-jump loop of the anti-jump relay of the operation box is adopted in the operation box of the protection device, when the operation box is adopted for anti-jump, the e-f connecting wire needs to be disconnected, because the e-f-g-n-o loop of the anti-jump loop of the mechanism box cannot be conducted, the monitoring loop is an a-b-c loop, and the a-b-c loop can monitor the c-d-e-i-j-k loop in the control loop. When the breaker is in the opening position and stores energy, namely, the breaker auxiliary contact DL1 is closed, the breaker auxiliary contact DL2 is closed, the breaker auxiliary contact DL3 is opened, the breaker auxiliary contact DL4 is opened, the breaker auxiliary contact DL5 is opened and the switch CK is closed, at the moment, the a-b-c-d-e-i-j-k loop is conducted, the tripping position relay TWJ is electrically excited, the tripping position indicator TWD is lighted, if any contact, equipment or terminal fault in the branch c-d-e-i-j-k loop is opened, the a-b-c-d-e-i-j-k loop is not conducted, the tripping position relay TWJ is electrically excited, the tripping position indicator TWD is extinguished, and the device alarms the control loop to remind a maintainer or an operator of the disconnection fault.

When the operating box is adopted to prevent tripping, on the premise that the circuit integrity of the tripping prevention circuit e-f-g-n-o of the mechanism box is ensured, when the circuit breaker is at a closing position, namely, the auxiliary circuit breaker contact DL1 is opened, the auxiliary circuit breaker contact DL2 is opened, the auxiliary circuit breaker contact DL3 is closed, the auxiliary circuit breaker contact DL4 is closed and the auxiliary circuit breaker contact DL5 is closed, the relay HWJ at the closing position is electrically excited, and the closing indicator HWD is lighted; because the a-b-c-d-e-f-g-m-n-o loop is conducted, the tripping position relay TWJ is electrically excited, the tripping position indicator lamp TWD is lighted, and the tripping and closing position indicator lamps of the circuit breaker are simultaneously lighted at the same time, so that a fault state is displayed.

At present, the improvement requires that the point c of the monitoring loop a-b-c is disconnected to the point p, at the moment, the monitoring loop is a-b-p-f-e, and because the auxiliary contact DL2 of the circuit breaker is disconnected, the tripping position relay TWJ is deenergized, the tripping position indicator lamp TWD is not lightened, and only the closing indicator lamp HWD is correctly lightened, so that the problem that the tripping position indicator lamp and the closing indicator lamp are lightened simultaneously when the circuit breaker is in the closing position can be solved.

However, the monitored part of the closing loop in the control loop of the method is shortened to be an e-i-j-k part, so that the C-d-e part can not be monitored any more, the reliable operation of the control loop is not facilitated, an outdoor cable is required for the long distance from the point C to the point P (from the main control room to the switching field), and the possibility of mistaken disconnection of the monitoring loop a-b-P-g-f-e-i-j-k is increased. When the breaker is at the opening position and the mechanism prevents tripping action, the monitoring loop is a-b-p-f-e, and the monitoring loop CJX2 is disconnected, TWJ is powered off, the tripping position indicator lamp TWD is not lighted, and the device reports that the control loop is disconnected. When the breaker is in the breaking position, namely DL1 closing, DL2 closing, DL3 opening, DL4 opening, DL5 opening and CK closing, and the mechanism anti-tripping actions, namely CJX1 closing, CJX2 opening and CJX3 opening, the monitoring loop is a-b-p-f-e, as the breaker mechanism box of the monitoring loop prevents the tripping relay CJX3 opening, the tripping position relay TWJ is powered off, the tripping position indicator lamp TWD is not on, and only can alarm and control the loop disconnection to remind a maintainer or an operator to handle the disconnection fault.

Disclosure of Invention

The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide a switch-on loop monitoring loop which adopts a breaker mechanism to prevent tripping, wherein a normally closed contact 1HWJ1 of a first tripping loop monitoring relay 1HWJ and a normally closed contact 2HWJ1 of a second tripping loop monitoring relay 2HWJ are connected in series and then are connected into the switch-on loop monitoring loop, so that the monitored part of the switch-on loop is increased. The normally open contact CJX4 of the breaker mechanism anti-jump relay CJX is connected into the open signal loop of the measurement and control device, and if the breaker mechanism is started in a jumping-preventing way, the breaker mechanism is signaled to take a jumping-preventing action, and the device has the remarkable advantages of being simple in structure, easy to realize, capable of monitoring in real time and the like.

In a first aspect, the utility model provides a switch-on circuit monitoring circuit adopting a breaker mechanism to prevent tripping, comprising a breaker mechanism anti-tripping relay CJX, a first tripping monitoring circuit and a second tripping monitoring circuit, wherein a normally closed contact of the first tripping monitoring circuit is connected in series with a normally closed contact of a relay of the second tripping monitoring circuit; the normally open contact CJX4 of the breaker mechanism anti-jump relay CJX is electrically connected with the measurement and control device.

In combination with the first aspect, the circuit breaker control loop includes a circuit breaker auxiliary contact DL3 and a trip coil TQ1, the circuit breaker auxiliary contact DL3 and the trip coil TQ1 being in series.

In combination with the first aspect, the first trip monitoring loop includes a closing indicator lamp 1HWD and a first trip loop monitoring relay 1HWJ, one end of a coil of the first trip loop monitoring relay 1HWJ is electrically connected to a control loop positive electricity 1km+, and the other end of a coil of the first trip loop monitoring relay 1HWJ, the closing indicator lamp 1HWD, a breaker auxiliary contact DL3 and a trip coil TQ1 are in series with the control loop negative electricity 1KM-.

With reference to the first aspect, the circuit breaker control loop further includes a trip position relay TWJ, a trip indicator lamp TWD, an operation box anti-trip relay, a remote/in-place switching handle HK, a circuit breaker auxiliary contact DL1, a closing coil HQ, and a switch CK;

the second trip monitoring circuit includes a second trip circuit monitoring relay 2HWJ, a control circuit positive 1km+, a coil TWJ1 of a trip position relay TWJ, a trip indicator lamp TWD, a normally closed contact 1HWJ1 of a first trip circuit monitoring relay 1HWJ, a normally closed contact 2HWJ1 of a second trip circuit monitoring relay 2HWJ, a normally closed contact TBJV of an operator box anti-trip relay, a remote/on-site switching handle HK, a normally closed contact CJX2 of a breaker mechanism box anti-trip relay CJX, a breaker auxiliary contact DL1, a closing coil HQ switch CK, and a control circuit negative 1 KM-in series.

In combination with the first aspect, the circuit breaker control loop further includes a circuit breaker auxiliary contact DL5 and a trip coil TQ2, the circuit breaker auxiliary contact DL5 and the trip coil TQ2 being in series.

In combination with the first aspect, the second trip monitoring loop comprises a closing indicator lamp 3HWD, one end of a coil of the second trip monitoring relay 2HWJ is electrically connected with the positive control loop electricity 2km+, and the other end of a coil of the second trip monitoring relay 2HWJ is connected with the closing indicator lamp 3HWD, the auxiliary contact DL5 of the circuit breaker and the trip coil TQ2 in series and then is electrically connected with the negative control loop electricity 2KM-.

In combination with the first aspect, the circuit breaker control loop further includes a remote/on-site switching handle HK, and a connection point e on a normally closed contact CJX2 wire of the remote/on-site switching handle HK and the circuit breaker mechanism box anti-tripping relay CJX is connected in series with a normally open contact CJX1 of the circuit breaker mechanism box anti-tripping relay CJX and the circuit breaker mechanism anti-tripping relay CJX and then connected to the control loop negative electricity 1KM-.

In combination with the first aspect, the circuit breaker control loop further comprises a hand trip relay, a hand trip relay 2STJ, a trip relay 2TJR, a trip hold relay 2TBJ, a circuit breaker auxiliary contact DL5, a trip coil TQ2, a low-pressure latching hand relay and a non-electric quantity trip relay 2TJF, wherein the control loop positive 2km+, the normally open contact 1STJ of the hand trip relay, the circuit breaker auxiliary contact DL5, the trip coil TQ2 and the control loop negative 2 KM-are connected in series, the normally open contact 2TJR of the trip relay 2TJR is connected in parallel to both ends of the normally open contact 1STJ of the hand trip relay, the normally open contact 2TJF1 of the non-electric quantity trip relay 2TJF is connected in parallel to both ends of the normally open contact 2TJF1 of the trip relay, the normally open contact 2km+ of the trip relay 2TJR of the control loop positive, the normally open contact 11YJJ of the low-pressure latching hand relay and the circuit breaker auxiliary contact 5 are connected in series, the normally open contact 2km+ of the control loop hold relay TBJ, the normally open contact 2 d TBJ of the control loop positive 2km+ and the normally open contact hold relay TBJ of the circuit breaker auxiliary contact 5 are connected in series.

The utility model has the beneficial effects that:

when the breaker is at a closing position, namely DL1 is opened, DL2 is opened, DL3 is closed, DL4 is closed, DL5 is closed, 1HWJ1 is opened and 2HWJ1 is opened, the opening and closing circuit conducts the excitation of the closing position relay 1HWJ and the closing position relay 2HWJ, the closing indicator lamp 1HWD and the tripping indicator lamp TWD are lighted, if the circuit where the tripping coil TQ1 of the tripping circuit is located is broken at the moment, the closing position relay 1HWJ is powered off, the closing indicator lamp 1HWD is not lighted, and the device reports the control circuit to be broken, so as to remind maintenance personnel and operators of handling broken line faults; if the circuit where the tripping coil TQ2 of the tripping second circuit is located is broken, the switching-on position relay 2HWJ is powered off and the tripping indicator light TWD is not on, the device reports the broken circuit of the control circuit, and reminds maintenance and operators of handling broken circuit faults.

When the circuit breaker is at the opening position and stores energy, namely DL1 is closed, DL2 is closed, DL3 is opened, DL4 is opened, DL5 is opened, CK is closed, 1HWJ1 is closed and 2HWJ1 is closed, the opening circuit is not conducted, the closing position relay 1HWJ and the closing position relay 2HWJ are not excited, and the closing indicator lamp 1HWD and the tripping indicator lamp TWD are not on; the circuit of a-b-c-d-e-i-j-k is conducted, a coil TWJ of a tripping position relay is electrically excited and a tripping position indicator lamp TWD is lightened, if a circuit where a closing coil HQ of a closing circuit is positioned is broken, the coil TWJ of the tripping position relay is powered off and the tripping position indicator lamp TWD is not lightened, the device reports the broken circuit of the control circuit, and reminds maintenance and operation personnel to process broken circuit faults;

if the anti-tripping function of the circuit breaker is started at the closing position, the background and the device cannot receive any alarm information, and only when the circuit breaker is disconnected from the closing state and is at the opening position, the anti-tripping relay CJX is electrically excited, the CJX2 contacts are disconnected, the coil TWJ of the relay at the tripping position is powered off, the TWD is not on, and the device reports that the control loop is disconnected, so that maintenance and operation personnel can be reminded of handling the disconnection fault;

according to the utility model, the normally open contact CJX4 is connected into the measurement and control device, if the tripping prevention function of the circuit breaker is started when the circuit breaker is in the switching-on position, the normally open contact CJX4 is closed, the measurement and control device reports tripping prevention starting alarm of the circuit breaker mechanism, so that maintenance and operation personnel are reminded to process a disconnection fault, and the circuit breaker mechanism can alarm only when the circuit breaker is disconnected from the switching-on state and is in the switching-off position.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of a prior art circuit breaker operator tank anti-skip control loop;

FIG. 2 is a schematic diagram of a prior art circuit breaker mechanism case anti-skip control loop;

FIG. 3 is a schematic diagram of an interrupt mechanism box anti-skip control loop in accordance with some embodiments of the present application;

fig. 4 is a circuit diagram of a second trip monitoring circuit in some embodiments of the present application;

FIG. 5 is a circuit diagram of an interrupt mechanism anti-bounce signaling in accordance with some embodiments of the present application;

fig. 6 is a block diagram of a first trip circuit supervision relay 1HWJ in some embodiments of the present application;

fig. 7 is a block diagram of a second trip circuit supervision relay 2HWJ in some embodiments of the present application;

fig. 8 is a block diagram of an interrupter mechanism anti-jump relay CJX according to some embodiments of the present application.

Detailed Description

In order to facilitate the technical solution of the application, some concepts related to the present application will be described below first.

It should be noted that, if there is a directional indication (such as up, down, left, right, front, rear.

In addition, if the description of "first" and "second" etc. is referred to in the present utility model, it is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" and "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 3, the utility model provides a closing circuit monitoring loop adopting a breaker mechanism to prevent tripping, which comprises a breaker mechanism tripping prevention relay CJX, a first tripping monitoring loop and a second tripping monitoring loop, wherein a normally closed contact of the first tripping monitoring loop is connected in series with a normally closed contact of a relay of the second tripping monitoring loop, the first tripping monitoring loop is electrically connected with a measurement and control device, and a normally open contact CJX4 of the breaker mechanism tripping prevention relay CJX is connected in series with the measurement and control device as shown in fig. 5. When the circuit breaker is at the closing position, the closing contact in the closing loop is closed or when the closing loop is connected in series with positive electricity, the tripping relay CJX of the circuit breaker mechanism is started electrically, the normally open contact CJX4 of the tripping relay CJX of the circuit breaker mechanism is closed in FIG. 5, the signal loop is conducted, the measurement and control device reports the tripping prevention of the circuit breaker mechanism as a signal, and the operation and maintenance personnel timely check and process control loop faults according to the signal.

In some embodiments of the present application, the circuit breaker control loop includes a circuit breaker auxiliary contact DL3 and a trip coil TQ1, the circuit breaker auxiliary contact DL3 and the trip coil TQ1 being in series. The first tripping monitoring loop comprises a closing indicator lamp 1HWD and a first tripping monitoring relay 1HWJ, one end of a coil of the first tripping monitoring relay 1HWJ is electrically connected with a control loop positive electricity 1KM+, and the other end of a coil of the first tripping monitoring relay 1HWJ, the closing indicator lamp 1HWD, a breaker auxiliary contact DL3, a tripping coil TQ1 and the control loop negative electricity 1KM are connected in series. The circuit breaker control loop also comprises a tripping position relay TWJ, a tripping indicator lamp TWD, an operation box anti-tripping relay, a remote/on-site switching handle HK, a circuit breaker auxiliary contact DL1, a closing coil HQ and a switch CK; the second trip monitoring circuit includes a second trip circuit monitoring relay 2HWJ, a control circuit positive 1km+, a coil TWJ1 of a trip position relay TWJ, a trip indicator lamp TWD, a normally closed contact 1HWJ1 of a first trip circuit monitoring relay 1HWJ, a normally closed contact 2HWJ1 of a second trip circuit monitoring relay 2HWJ, a normally closed contact TBJV of an operator box anti-trip relay, a remote/on-site switching handle HK, a normally closed contact CJX2 of a breaker mechanism box anti-trip relay CJX, a breaker auxiliary contact DL1, a closing coil HQ switch CK, and a control circuit negative 1 KM-in series.

The utility model connects the normally closed contact 1HWJ1 of the first tripping circuit monitoring relay 1HWJ and the normally closed contact 2HWJ1 of the second tripping circuit monitoring relay 2HWJ in series and then connects the monitoring circuit a-b-c of the switching-on circuit, solves the problem that the monitoring circuit is shortened after tripping prevention by adopting a circuit breaker mechanism, the monitored circuit is a c-d-e-i-j-k circuit which adopts an operation box to prevent tripping, the monitored circuit is added with a c-d-e part compared with the prior design, and when the circuit breaker is in a switching-on position (DL 1 is opened, DL2 is opened, DL3 is closed, DL4 is closed, DL5 is closed, 1HWJ1 is opened, 2HWJ1 is opened), HWJ obtains electric excitation, HWD is lighted, as the 1HWJ1 is opened and 2HWJ1 is opened in the circuit breaker mechanism, the coil TWJ of the tripping position relay is deenergized, and the tripping position indicator lamp TWD is not lighted, thereby solving the problem that the switching-on position lamp and the switching-on position lamp are lighted simultaneously when the circuit breaker is in the switching-on position.

In some embodiments of the present application, as shown in fig. 4, the circuit breaker control loop further includes a circuit breaker auxiliary contact DL5 and a trip coil TQ2, the circuit breaker auxiliary contact DL5 and the trip coil TQ2 being connected in series. The second tripping monitoring loop comprises a closing indicator lamp 3HWD, one end of a coil of the second tripping monitoring relay 2HWJ is electrically connected with the positive electrode 2KM+ of the control loop, and the other end of a coil of the second tripping monitoring relay 2HWJ is connected with the closing indicator lamp 3HWD, an auxiliary contact DL5 of the circuit breaker and a tripping coil TQ2 in series and then is electrically connected with the negative electrode 2 KM-of the control loop.

In some embodiments of the present application, the circuit breaker control loop further comprises a remote/on-site switching handle HK, the remote/on-site switching handle HK and a connection point e on the normally closed contact CJX2 connection of the circuit breaker mechanism case anti-tripping relay CJX being connected in series with the normally open contact CJX1 of the circuit breaker mechanism case anti-tripping relay CJX and the circuit breaker mechanism anti-tripping relay CJX being connected back to the control loop negative electricity 1KM-.

In some embodiments of the present application, the circuit breaker control loop further comprises a relay 1TBJ, a relay 1TJF, a relay 1TJR, a resistor R6, a relay 1TJF, a resistor R5, a relay 3STJ, a resistor R4, a relay 1STJ, a relay 2STJ, a resistor R3, a normally open contact 1TBJ of the relay 1TBJ and a relay 1TBJ are connected in parallel at both ends of the switch-on indicator lamp 1HWD and the first trip loop monitoring relay 1HWJ, a normally open contact 1TJR of the control loop positive 1km+ and relay 1TJR, a relay 1TJR, a resistor R6 and a control loop negative contact 1 KM-series, a normally open contact 1 tjv 1 of the relay 1TJF is connected in parallel at a normally open contact 1TJR of the relay 1 jv 6, a relay 1TJF and a resistor R5 are connected in parallel at a junction of the relay 1 jv TJR and the resistor R6, a relay 3STJ and a resistor R4 are connected in parallel at a junction of the relay TJR and the resistor R6, a normally open contact 1tbj 2 is connected at a junction of the relay 3 tbj 2 and a normally open contact 2tbj 2 of the relay 3 tbj 2, a normally open contact 2tbj 2 is connected in parallel at a junction of the relay 3 tbj 2 and a normally open contact 2tbj 2 is connected in series at a junction of the relay 3 jj 2 jj 1 jj 2 junction of the normally open contact 1 jj 1 6.

In some embodiments of the present application, the circuit breaker control loop further includes a hand trip relay, a hand trip relay 2STJ, a trip relay 2TJR, a trip hold relay 2TBJ, a circuit breaker auxiliary contact DL5, a trip coil TQ2, a low pressure lockout hand trip relay and a non-electrical trip relay 2TJF, a control loop positive 2km+, a normally open contact 1STJ of the hand trip relay, a circuit breaker auxiliary contact DL5, a trip coil TQ2 and a control loop negative 2 KM-are connected in series, normally open contacts 1STJ of the hand trip relay are connected in parallel with normally open contacts 2TJR1 of the trip relay 2TJR at both ends, normally open contacts 2TJF1 of the trip relay are connected in parallel with normally open contacts 2TJF1 of the non-electrical trip relay 2TJF at both ends, normally open contacts 2km+ of the trip relay are connected in series with normally open contacts 11YJJ of the trip relay, normally open contacts DL5 of the control loop positive 2km+, normally open contacts 2 jj of the trip relay and normally open contacts TBJ of the control loop positive hold relay 2TBJ, normally open contacts 2 and the circuit breaker auxiliary contacts TBJ are connected in series. The coil series resistor R8 of the tripping relay 2TJR in the second tripping monitoring loop is electrically connected with the negative electricity 2 KM-of the control loop, and the coil series resistor R7 of the non-electric quantity tripping relay 2TJF in the second tripping monitoring loop is electrically connected with the negative electricity 2 KM-of the control loop.

As shown in fig. 6, the first trip circuit supervision relay 1HWJ includes a coil of the first trip circuit supervision relay and a normally closed contact 1HWJ1 of the first trip circuit supervision relay 1HWJ, as shown in fig. 7, the second trip circuit supervision relay 2HWJ includes a coil of the second trip circuit supervision relay 2HWJ and a normally closed contact 2HWJ1 of the second trip circuit supervision relay 2HWJ, as shown in fig. 8, the breaker mechanism case jumper relay CJX includes a normally open contact CJX1 of the breaker mechanism case jumper relay CJX, a normally closed contact CJX2 of the breaker mechanism case jumper relay CJX, a normally closed contact CJX3 of the breaker mechanism case jumper relay CJX, and a normally open contact CJX4 of the breaker mechanism case jumper relay CJX.

When the breaker is at a closing position, namely DL1 is opened, DL2 is opened, DL3 is closed, DL4 is closed, DL5 is closed, 1HWJ1 is opened and 2HWJ1 is opened, the opening and closing circuit conducts the excitation of the closing position relay 1HWJ and the closing position relay 2HWJ, the closing indicator lamp 1HWD and the tripping indicator lamp TWD are lighted, if the circuit where the tripping coil TQ1 of the tripping circuit is located is broken at the moment, the closing position relay 1HWJ is powered off, the closing indicator lamp 1HWD is not lighted, and the device reports the control circuit to be broken, so as to remind maintenance personnel and operators of handling broken line faults; if the circuit where the tripping coil TQ2 of the tripping second circuit is located is broken, the switching-on position relay 2HWJ is powered off and the tripping indicator light TWD is not on, the device reports the broken circuit of the control circuit, and reminds maintenance and operators of handling broken circuit faults.

When the breaker is at the opening position and stores energy, namely DL1 is closed, DL2 is closed, DL3 is opened, DL4 is opened, DL5 is opened, CK is closed, 1HWJ1 is closed and 2HWJ1 is closed, the opening circuit is not conducted, the switching-on position relay 1HWJ and the switching-on position relay 2HWJ are not excited, the switching-on indicator lamp 1HWD and the tripping indicator lamp TWD are not on, the circuit of a-b-c-d-e-i-j-k is conducted, the coil TWJ of the tripping position relay is electrically excited and the tripping position indicator lamp TWD is lighted, if the circuit where the switching-on coil HQ of the switching-on circuit is located at the moment is disconnected, the coil TWJ of the tripping position relay is not powered off and the tripping position indicator lamp TWD is not on, the device reports the circuit disconnection, and reminds maintenance and operation personnel to process the disconnection fault.

When the circuit breaker is in the switching-on position (DL 1 is opened, DL2 is opened, DL3 is closed, DL4 is closed, DL5 is closed, 1HWJ is opened and 2HWJ is opened), if the switching-on contacts in the switching-on loop are switched on (such as remote control switching-on contacts are switched on, manual loop is switched on, reclosing loop is switched on, HBJ1 is switched on, etc.), the anti-tripping relay CJX is electrically excited, the CJX2 contacts are opened, and the switching-on loop is disconnected, so that the anti-tripping function is still intact after the design.

For the original loop, if the anti-jump function is started when the circuit breaker is at the closing position, the background and the device cannot receive any alarm information, and only when the circuit breaker is disconnected from the closing state and is at the opening position, the anti-jump relay CJX is electrically excited, the CJX2 contacts are disconnected, the coil TWJ of the tripping position relay is in power failure and TWD is not bright, and the device reports that the control loop is broken, so that maintenance and operation personnel can be reminded of handling the broken line fault.

According to the utility model, the CJX4 normally open contact is connected into the measurement and control device, if the tripping prevention function is started when the breaker is at the closing position, the CJX4 normally open contact is closed, the measurement and control device reports tripping prevention starting alarm of the breaker mechanism, so that maintenance personnel and operators are reminded to process a disconnection fault, and the breaker mechanism can alarm only when the breaker is disconnected from the closing state and is at the opening position.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

The foregoing detailed description of the embodiments has further described the objects, technical solutions and advantageous effects of the present application, and it should be understood that the foregoing is only a detailed description of the present application and is not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the scope of protection of the present application.

Claims (5)

1. The switching-on loop monitoring loop is characterized by comprising a tripping-preventing relay CJX of the circuit breaker mechanism, a first tripping monitoring loop and a second tripping monitoring loop, wherein a normally-closed contact of the first tripping monitoring relay is connected in series with a normally-closed contact of a relay of the second tripping monitoring loop, and a normally-open contact CJX4 of the tripping-preventing relay CJX of the circuit breaker mechanism is electrically connected with a measurement and control device;

the circuit breaker control loop comprises a circuit breaker auxiliary contact DL3 and a tripping coil TQ1, and the circuit breaker auxiliary contact DL3 and the tripping coil TQ1 are connected in series;

the first tripping monitoring loop comprises a switching-on indicator lamp 1HWD and a first tripping loop monitoring relay 1HWJ, one end of a coil of the first tripping loop monitoring relay 1HWJ is electrically connected with a control loop positive electricity 1KM+, and the other end of a coil of the first tripping loop monitoring relay 1HWJ, the switching-on indicator lamp 1HWD, a breaker auxiliary contact DL3, a tripping coil TQ1 and a control loop negative electricity 1 KM-are connected in series;

the circuit breaker control loop also comprises a tripping position relay TWJ, a tripping indicator lamp TWD, an operation box anti-tripping relay, a remote/on-site switching handle HK, a circuit breaker auxiliary contact DL1, a closing coil HQ and a switch CK;

the second trip monitoring circuit includes a second trip circuit monitoring relay 2HWJ, a control circuit positive 1km+, a coil TWJ1 of a trip position relay TWJ, a trip indicator lamp TWD, a normally closed contact 1HWJ1 of a first trip circuit monitoring relay 1HWJ, a normally closed contact 2HWJ1 of a second trip circuit monitoring relay 2HWJ, a normally closed contact TBJV of an operator box anti-trip relay, a remote/on-site switching handle HK, a normally closed contact CJX2 of a breaker mechanism box anti-trip relay CJX, a breaker auxiliary contact DL1, a closing coil HQ switch CK, and a control circuit negative 1 KM-in series.

2. A closing circuit monitoring circuit employing a circuit breaker mechanism to prevent tripping as set forth in claim 1, wherein,

the circuit breaker control loop also includes a circuit breaker auxiliary contact DL5 and a trip coil TQ2, the circuit breaker auxiliary contact DL5 and the trip coil TQ2 being in series.

3. A closing circuit monitoring circuit employing a circuit breaker mechanism to prevent tripping as claimed in claim 2, wherein,

the second tripping monitoring loop comprises a closing indicator lamp 3HWD, one end of a coil of the second tripping monitoring relay 2HWJ is electrically connected with the positive electrode 2KM+ of the control loop, and the other end of a coil of the second tripping monitoring relay 2HWJ is connected with the closing indicator lamp 3HWD, an auxiliary contact DL5 of the circuit breaker and a tripping coil TQ2 in series and then is electrically connected with the negative electrode 2 KM-of the control loop.

4. A closing circuit monitoring circuit employing a circuit breaker mechanism to prevent tripping as set forth in claim 1, wherein,

the circuit breaker control loop also comprises a remote/on-site switching handle HK, and a connection point e on a normally closed contact CJX2 connection line of the remote/on-site switching handle HK and the circuit breaker mechanism box anti-jump relay CJX is connected in series with a normally open contact CJX1 of the circuit breaker mechanism box anti-jump relay CJX and is connected with negative electricity 1 KM-of the control loop after the circuit breaker mechanism anti-jump relay CJX.

5. A closing circuit monitoring circuit employing a circuit breaker mechanism to prevent tripping as set forth in claim 1, wherein,

the circuit breaker control loop further comprises a hand trip relay, a hand trip relay 2STJ, a tripping relay 2TJR, a trip holding relay 2TBJ, a circuit breaker auxiliary contact DL5, a tripping coil TQ2, a pressure low-locking hand trip relay and a non-electric quantity tripping relay 2TJF, wherein a control loop positive electrode 2KM+, a normally open contact 1STJ of the hand trip relay, a circuit breaker auxiliary contact DL5, a tripping coil TQ2 and a control loop negative electrode 2 KM-are connected in series, the normally open contact 2TJR1 of the tripping relay 2TJR is connected in parallel at two ends of the normally open contact 1STJ of the hand trip relay, the normally open contact 2TJF1 of the non-electric quantity tripping relay 2TJF is connected in parallel at two ends of the normally open contact 2TJR of the tripping relay, the normally open contact 2TJR of the control loop positive electrode 2KM+, the normally open contact 11YJJ of the tripping relay and the circuit breaker auxiliary contact DL5 are connected in series, the normally open contact 2KM+ of the control loop positive electrode 2TBJ, the normally open contact 2TBJ of the trip holding relay 2TJF and the circuit breaker auxiliary contact 5 are connected in series.