CN213425846U - Self-powered switchgear locking system - Google Patents

Abstract

A self-powered switchgear latching system comprising: the control circuit comprises a power supply end, a control transformer and an execution end, wherein the execution end comprises an electromagnetic lock (Y0), the power supply end comprises an input voltage end and a relay (KA1), and a fuse is arranged between the input voltage end and the relay (KA 1); the execution end further comprises: a super capacitor (C1) and a super capacitor (C2) in parallel with the control transformer; a contact of a relay (KA1) is arranged in parallel between the super capacitor (C1) and the super capacitor (C2) at the execution end; a latching contact in the switchgear control circuit is arranged between the supercapacitor (C2) and the electromagnetic lock (Y0). The system adopts advanced electromagnetic lock self-power principle, and circuit structure is novel, simple, dependable performance, and is with low costs. The utility model discloses still parallelly connected two contacts before super capacitor (C2), realized switchgear "do not have the requirement of preventing", prevent the mistake and go into electrified interval.

Description

Self-powered switchgear locking system

Technical Field

The utility model discloses a self-powered switchgear shutting system belongs to the technical field of switchgear safety shutting.

Background

In order to prevent an operator from entering an electrified interval by mistake, an electromagnetic lock is required to be additionally arranged in power supply equipment such as medium-low voltage complete equipment, a transformer cabinet and the like. In a low-voltage distribution system, as a transformer (including a transformer power supply side) is powered off and then has no reliable uninterruptible power supply, an electromagnetic lock has no working power supply, and an electromagnet cannot correctly realize locking, the prior art conventionally adopts the following two methods:

1. the electromagnetic lock action logic: the door is closed by power supply and can be opened;

this scheme is when the proruption has a power failure, when not having uninterrupted power source's occasion, leads to the cabinet door can't open under any circumstance. Other different power supply points are introduced in the general industry, so that power lines need to be connected on site, the power lines are long, and wiring is troublesome; the uninterruptible power supply can not be used in occasions without different power supply points, and the price of the added uninterruptible power supply is high, so that the project cost is high.

2. The electromagnetic lock action logic: the door can be opened when the door is closed after power failure;

the scheme results in that after the abnormal power failure of the transformer, the door can be opened, and after the transformer is mistakenly inserted into the electrified interval, a sudden incoming call causes electric shock, so that certain potential safety hazards exist.

Disclosure of Invention

The technical problem to switchgear's low pressure side does not have uninterrupted power supply, the utility model discloses a self-powered switchgear shutting system can thoroughly solve when on-the-spot proruption has a power failure, the technical problem of the unable unblock of electromagnetic lock.

The technical scheme of the utility model as follows:

a self-powered switchgear latching system comprising: power end, controlling transformer and execution end, the execution end include electromagnetic lock Y0, its characterized in that:

the power supply end comprises an input voltage end and a relay KA1, and a fuse is arranged between the input voltage end and the relay KA 1;

the execution end further comprises: a super capacitor C1 and a super capacitor C2 connected in parallel with the control transformer;

a contact of a relay KA1 is arranged in parallel between the super capacitor C1 and the super capacitor C2 of the execution end;

and a latching contact in a switch device control loop is arranged between the super capacitor C2 and the electromagnetic lock Y0.

According to the utility model discloses preferred, the execution end still includes rectification circuit D.

According to the present invention, preferably, the rectifying circuit D is a full-wave rectifying bridge circuit.

According to the utility model discloses preferred, relay KA1 is miniature relay.

The technical advantages of the utility model reside in that:

1. the system adopts advanced electromagnetic lock self-power principle, and circuit structure is novel, simple, dependable performance, and is with low costs.

2. The utility model discloses a minirelay, the consumption is little, and electric action is accurate, and especially minirelay KA 1's coil is parallelly connected in control transformer T's power supply side, and two contacts are parallelly connected before super capacitor C2, have realized the requirement of switchgear "five prevent", prevent that the mistake from going into electrified interval. The electric principle is simple and reliable, and the cost is low.

3. The utility model discloses well adoption super capacitor uses as energy storage component, has both had electrostatic capacitor's high discharge power advantage and has great charge storage capacity like the battery again. The super capacitor also has the advantages of long cycle life, high power density, high charging and discharging speed, good high-temperature performance, flexible capacity configuration, environmental friendliness, no maintenance and the like, replaces the traditional storage battery for energy storage, and has reliable performance and reduced cost.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the following examples and drawings, but is not limited thereto.

Examples 1,

As shown in fig. 1, a self-powered switchgear latching system, comprising: the control circuit comprises a power supply end, a control transformer T and an execution end, wherein the execution end comprises an electromagnetic lock Y0, the electromagnetic lock YO is DSN-AMZ, the rated voltage DC110V, the rated current 100 mA:

the power supply ends comprise an input voltage end L, N and a relay KA1, and fuses FU1 and FU2 are arranged between the input voltage end L, N and the relay KA 1; the input voltage of the input voltage end L, N is 220V 50Hz, the fuses FU1 and FU2 have the short-circuit protection function in the fault, the model is RT18-32/2, and the melt is 2A;

the execution end further comprises: a super capacitor C1 and a super capacitor C2 connected in parallel with the control transformer T; the super capacitor also has the advantages of long cycle life, high power density, high charging and discharging speed, good high-temperature performance, flexible capacity configuration, environmental friendliness, no maintenance and the like, and replaces the traditional storage battery for energy storage.

A contact of a relay KA1 is arranged in parallel between the super capacitor C1 and the super capacitor C2 of the execution end;

a latching contact KA in a control loop of the switch device is arranged between the super capacitor C2 and the electromagnetic lock Y0, and the functions of the latching contact KA are as follows:

when the switch equipment normally operates, the locking contact KA is disconnected, the electromagnetic lock YO coil has no power supply, and the unlocking condition is not met;

when the switch equipment is in failure or power failure, the locking contact KA is closed, the electromagnetic lock YO coil can obtain a power supply, and the unlocking condition is met;

the execution end further comprises a rectification circuit D, the rectification circuit D is a full-wave rectification bridge circuit, the control transformer T reduces the 220V voltage to a value required by the super capacitor and is consistent with the voltage of the rectification circuit D, the control transformer T selects JBK3-250VA with the rated capacity of 250VA, the rectification circuit D adopts a full-wave rectification bridge circuit, the rectified alternating current content can be better reduced, particularly after the super capacitor C1 is adopted, higher harmonics can be well filtered out, and the charging requirement is met;

the relay KA1 is a small relay, and is formed by selecting an ohm dragon MY2NJ and rated load current 220VAC 2A; the working principle is as follows:

when the power supply supplies power normally, the coil of the miniature relay KA1 is electrified, the contact is closed, the super capacitor C1 is charged, and electric energy is stored;

when the power supply is powered off, the coil of the miniature relay KA1 loses power, the contact is disconnected, the electric energy stored in the super capacitor C1 is prevented, and the secondary coil of the transformer T is controlled to discharge.

The locking system can meet the requirement of five-prevention of the switch equipment and prevent the switch equipment from entering the electrified interval by mistake. The super capacitor C2 is SU 2400-2400P-0027V-1 RA, which has the advantage of high discharge power of the electrostatic capacitor and also has larger charge storage capacity like a battery.

Claims (4)

1. A self-powered switchgear latching system comprising: power end, control transformer and execution end, the execution end include electromagnetic lock (Y0), its characterized in that:

the power supply end comprises an input voltage end and a relay (KA1), and a fuse is arranged between the input voltage end and the relay (KA 1);

the execution end further comprises: a first super capacitor (C1) and a second super capacitor (C2) connected in parallel with the control transformer;

a contact of a relay (KA1) is arranged in parallel between the first super capacitor (C1) and the second super capacitor (C2) at the execution end;

a latching contact in the switchgear control circuit is arranged between the second supercapacitor (C2) and the electromagnetic lock (Y0).

2. A self-powered switchgear latching system in accordance with claim 1, characterized in that said actuating terminal further comprises a rectifying circuit (D).

3. A self-powered switchgear latching system according to claim 2, characterized in that said rectifying circuit (D) is a full-wave rectifying bridge circuit.

4. A self-powered switchgear latching system according to claim 1, characterized in that said relay (KA1) is a miniature relay.

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