阅读说明：本技术 一种应用在电力网络中的高压开关保护电路装置 (High-voltage switch protection circuit device applied to power network ) 是由 于曼 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种应用在电力网络,高压开关操作机构中,用于保护分合闸电磁铁线圈的保护电路装置,包括依次电连接在一起的继电器一、继电器二和电磁铁,所述继电器一外接于原电路的电源输出端,所述继电器一和继电器二内均设有常开接点。本发明与现有技术相比的优点在于：一、给电磁铁设计的一个延时电路,使其即能够满足机构正常时需要的工作时间,又能够在机构异常,不使其通电时间过长,就能够对电磁铁的线圈起到保护作用。二、能够在操作机构卡涩情况下,反复对操作机构进行动作,提高开关的工作可靠性。(The invention discloses a protection circuit device applied to a power network and a high-voltage switch operating mechanism and used for protecting a switching-on/off electromagnet coil. Compared with the prior art, the invention has the advantages that: firstly, a time delay circuit designed for the electromagnet can meet the working time required by the mechanism when the mechanism is normal, and can protect the coil of the electromagnet when the mechanism is abnormal and the electrifying time is not too long. And secondly, the operating mechanism can be repeatedly operated under the condition that the operating mechanism is jammed, so that the working reliability of the switch is improved.)

1. A high-voltage switch protection circuit device applied to a power network is characterized in that: including relay one (1), relay two (2) and electro-magnet (3) that in proper order electrical connection is in the same place, external 220V DC power supply in relay one (1), all be equipped with normally open contact in relay one (1) and relay two (2).

2. A high-voltage switch protection circuit arrangement for use in an electrical power network according to claim 1, wherein: the A1 terminal and the positive pole of 220V DC power supply of relay (1) are connected, and the A2 terminal is connected with the 220V DC power supply negative pole, the anodal output of power of relay (1) and the A1 terminal of relay two (2) are connected, the anodal output and the anodal input of electro-magnet (3) of relay two (2) are connected, electro-magnet (3) negative pole and relay two (2) A4 terminal are connected, and relay two (2) A2 terminal negative pole is connected with relay (1) A4 terminal.

3. A high-voltage switch protection circuit arrangement for use in an electrical power network according to claim 1, wherein: the delay time of the relay I (1) is nt, wherein t is t1+ t2, n is the number of cycles or the number of actions of the electromagnet (3) on the operating mechanism, t is the time of one cycle period of the relay II (2), t1 is the delay time, and t2 is the working time.

Technical Field

The invention relates to the technical field of high-voltage switches, in particular to a high-voltage switch protection circuit device applied to a power network.

Background

High voltage switches are available in both power networks and large and medium-sized factories and mines. The high-voltage switch is also called as a high-voltage circuit breaker, and has the functions of cutting off and connecting a load circuit, cutting off a fault circuit in an accident state, preventing the accident from being enlarged, protecting a power system and ensuring the safe operation of a power grid and electric equipment.

The high-voltage switch is mainly composed of a primary conductive loop body and an operating mechanism.

For the switching-off and switching-on operations of the high-voltage switch, computer technology is basically applied at present, and workers can carry out remote operation on equipment without going to the field for operation. However, when the switch is abnormal and the operating mechanism is jammed, no real-time monitoring method is available at present. Therefore, when the worker operates the system or the power system and the power system fault protection system act, the computer system still can send out an instruction indiscriminately when the operating mechanism is jammed and abnormal at the moment.

The operating mechanism has an important part called electromagnet, and the working principle of the operating mechanism is that under the action of the electromagnetic force, a tripper pulls the operating mechanism to act, so that a switch is instantaneously tripped or closed. Because the current of electro-magnet during operation is great, it is very fast to generate heat, when the mechanism is stuck, in the short time, the temperature can rise very fast, very easy heating damage. How to avoid the damage of the power supply has very important significance for safe power supply and safe production.

Disclosure of Invention

The invention aims to overcome the technical defects and provides a high-voltage switch protection circuit device applied to a power network, which is used for designing a delay circuit for an electromagnet, so that the delay circuit can meet the working time required by a mechanism in a normal state, and can protect a coil of the electromagnet when the mechanism is abnormal and the energization time is not too long.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides an use high tension switchgear protection circuit device in power network, is including relay one, relay two and the electro-magnet that in proper order the electricity link together, the external 220V direct current power supply of relay one, all be equipped with normally open contact in relay one and the relay two.

The A1 terminal of relay I is connected with the 220V DC power supply positive pole, and the A2 terminal is connected with the 220V DC power supply negative pole, the anodal output of power of relay I is connected with the A1 terminal of relay II, the anodal output of relay II is connected with the anodal input of electro-magnet, the electro-magnet negative pole is connected with two A4 terminals of relay, and two A2 terminal negative poles of relay are connected with a A4 terminal of relay.

The delay time of the first relay is nt, wherein t is t1+ t2, n is the number of cycles or the number of actions of the electromagnet on the operating mechanism, t is the time of one cycle period of the second relay, t1 is the delay time, and t2 is the working time.

Compared with the prior art, the invention has the advantages that: the time delay circuit is designed for the electromagnet, so that the time delay circuit can meet the working time required by the mechanism when the mechanism is normal, can protect the coil of the electromagnet when the mechanism is abnormal and does not have overlong electrifying time, can work circularly, can act for a plurality of times in set time, can obviously improve the reliability of the action of a high-voltage switch, and firstly protects the coil of a switching-on/off electromagnet; and secondly, the superposition of the momentum of the electromagnet is realized by increasing the action times of the electromagnet, and the problem of jamming of an operating mechanism is solved.

Drawings

Fig. 1 is a schematic structural diagram of a high-voltage switch protection circuit device applied in a power network according to the present invention.

As shown in the figure: 1. a first relay; 2. a second relay; 3. an electromagnet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides an use high tension switchgear protection circuit device in power network, is including relay 1, relay two 2 and the electro-magnet 3 that electricity in proper order linked together, the external 220V DC power supply of relay 1, all be equipped with normally open contact in relay 1 and the relay two 2.

The A1 terminal of relay 1 is connected with the positive pole of 220V DC power supply, and the A2 terminal is connected with the 220V DC power supply negative pole, the anodal output of power of relay 1 is connected with the A1 terminal of relay two 2, the anodal output of relay two 2 is connected with the anodal input of electro-magnet 3, the 3 negative poles of electro-magnet are connected with relay two 2A4 terminals, and the A2 terminal negative pole of relay two 2 is connected with the A4 terminal of relay 1.

In the specific implementation of the invention, when the terminal a1 and a2 of the first relay receive the direct current 220V direct current voltage, the coil in the first relay is electrified, the first relay enters the electrified delay state, (the delay time of the first relay 1 is nt, wherein t is t1+ t2, n is the cycle number or the action number of the electromagnet 3 to the operating mechanism, t is the time of one cycle period of the second relay 2, t1 is the delay time, t2 is the working time), the normally open contact in the first relay is closed, the terminals A3 and a4 are communicated, the coil of the second relay is electrified through the terminal a1 of the second relay, the second relay enters the electrified delay state → the delayed power off → the electrified delay …, one end of the electromagnet is connected with the power output end of the second relay, the electromagnet also simultaneously enters the electrified delay state → the delayed power off → the electrified delay …, and after the relay is electrified for a certain time, the normally closed contact is disconnected, the first relay enters a non-working state, the normally open contact is disconnected, the second relay is disconnected and stops working, the electromagnet stops working due to the fact that the first relay is disconnected, and the whole circuit completes a working cycle.

The delay circuit designed for the electromagnet does not need to modify a secondary circuit, so that a common electrician can modify the existing equipment to ensure that the current equipment can meet the working time required by the mechanism when the mechanism is normal, can protect the coil of the electromagnet when the mechanism is abnormal and does not cause the power-on time to be overlong, can work circularly, can act for a plurality of times within set time, can obviously improve the reliability of high-voltage switch action, and firstly protects the coil of the opening and closing electromagnet; and secondly, the superposition of the momentum of the electromagnet is realized by increasing the action times of the electromagnet, and the problem of jamming of an operating mechanism is solved.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.