KR20100074829A - Breaker for high tension power board - Google Patents

Abstract

The present invention provides a high-voltage switchgear breaker installed as a distribution line for delivering a supply power to a customer, wherein the overcurrent breakers 51R, 51S, 51T operated in response to the occurrence of a fault, and the breaker are tripped for the purpose of blocking the overcurrent. A relay 86X to switch to; An undervoltage relay (UVR) operating in response to a low voltage occurrence, the undervoltage relay in response to the relay (86X) operating to switch the breaker to a trip state; An image protection protection relay (POR) operated in response to one of three phases of the power supply, and in response to the image protection protection relay (POR) operating the relay 86X to switch the circuit breaker to a trip state; ; In response to the low voltage recovery or the phase recovery, the UVR or the POR is returned and excited in response to a predetermined time, and includes a relay 27T for automatically turning on the breaker.

Description

Breaker for high tension power board {Breaker for high tension power board}

The present invention relates to a high-voltage switchgear breaker, and more particularly, to a high-voltage switchgear breaker for automatically returning the breaker in a short time during low voltage recovery and phase recovery.

Distribution lines are needed to supply electricity from substations to consumers. If a power outage occurs in such a distribution line, the high voltage customer first shuts down the premises breaker to protect the premises equipment. Subsequently, if the distribution line is restored to normal by appropriate measures after the premises breaker is shut off, the customer premises electrician checks the state of the voltage and inputs it manually when there is no error.

Thus, in the event of a power outage of the distribution line, the premises circuit breaker is first cut off, and when the breaker is operated, a power failure time of about 20 minutes to 30 minutes is generally generated.

In addition, a power failure may occur, for example, from one hour to three hours or more until the electrician recovers to the power distribution line in the absence of work or the like.

The present invention is to solve the above-mentioned problems, under the appropriate circumstances, for example, 5 seconds to 10 seconds after the standby is automatically put into operation, and if the automatic input operation is not necessary to enable manual operation. It is to provide a high-voltage switchgear breaker that enables automatic injection.

SUMMARY OF THE INVENTION An object of the present invention is a high voltage switchgear breaker installed as a distribution line for delivering supply power to a customer, for overcurrent blocking, overcurrent breakers 51R, 51S, 51T operated in response to the occurrence of a failure and thereby the breaker A relay 86X for switching the to trip state;

An undervoltage relay (UVR) operating in response to a low voltage occurrence, the undervoltage relay in response to the relay 86X operating to switch the breaker to a trip state;

An image protection protection relay (POR) operated in response to one of three phases of the power supply, and in response to the image protection protection relay (POR) operating the relay 86X to switch the circuit breaker to a trip state; ,

In response to the low voltage recovery or the phase recovery, the UVR or POR is returned and, in response, is achieved by a high voltage switchgear breaker comprising a relay 27T which is excited after a predetermined time and automatically turns on the breaker.

The breaker further includes an auto-manual selection switch associated with the automatically-injected relay, and may be configured to automatically or manually open the breaker by the auto-manual selection switch.

The predetermined time may be 3 to 10 seconds.

In the present invention, there may be a case where the voltage is still returned even after the UVR is operated due to the low voltage generation. Then, as described above, since the breaker is kept in the trip state, no re-injection is performed, and there is no fear that the low-input is supplied. After the UVR returns, after the voltage returns, the breaker can be turned on automatically after 10 seconds as mentioned.

Even after the POR operation, there may be a return from the open phase. Then, as mentioned above, the circuit breaker is not re-inserted while the trip state is maintained. If the POR returns from the open phase after operation, power can be automatically supplied after 10 seconds.

This reduction in power outage time can lead to an increase in revenue, for example, due to an increase in sales power, for example, 7,631,087 kWH / year. Of course, the consumer can resolve the inconvenience of a power outage by prompt recovery.

Preferred embodiments according to the present invention will be described with reference to the accompanying drawings showing a specific circuit diagram.

1 is a circuit diagram illustrating a device for automatically inserting a high voltage power board breaker according to the present invention.

As shown, in order to accurately determine the recovery state of the voltage, an image protection relay (POR) and an undervoltage relay (UVR) are installed in the customer premises.

The circuit operation flow will be described below in the event of a premises failure.

If a breakdown occurs, the breaker is fitted with contacts a (not shown) of 51R, 51S and 51T. The breaker turns off as these overcurrent relays are activated.

Next, the 51X coil is excited and the coil a contact of 51X is input.

The 86X coil is then excited and the a contact of 86X is inserted.

As the contact a of the 86X is inputted, the breaker enters the trip state.

In the event of a failure in the premises, reclosing is not possible and the breaker is manually inserted after the failure recovery.

In the present invention, by providing an auto-manual selection switch, it is operated automatically or manually according to the selection. The auto-manual selection switch corresponds to the portion indicated by the AUTO symbol in the dashed box indicated by reference numeral 1 in FIG. 1. In the drawing, the current state represents a case where an automatic selection is made.

In the present invention, for the automatic operation, as shown in the figure, an imaging protection relay (POR) is provided as shown by the reference numerals 2 and 3.

First, the case where the undervoltage relay UVR automatically operates in relation to the UVR due to the low voltage generation will be described.

When a low voltage is generated, a contact of UVR, which is the undervoltage relay shown in the dashed box indicated by reference numeral 2 in FIG. 1, is inputted.

Subsequently, the 27X relay coil connected in series with the UVR is excited to input the 27X contact a.

Subsequently, the coil of the 86X relay is excited and the contact a of 86X is input.

As the contact a of the 86X is inputted, the breaker enters the trip state. That is, when a low voltage occurs, the breaker is turned off by the UVR relay.

Here, the low voltage recovery voltage normal return will be described.

When the low voltage returns to normal voltage, the UVR contact automatically returns and the coil of the 27X relay is broken.

Then, the b contact of 27X returns and the 27T relay is excited.

After a certain time, for example, 3 to 10 seconds, the a contact of the 27T relay is turned on to excite the 27X1 relay (see in dashed box indicated by reference numeral 1 in FIG. 1).

The breaker is closed when the contact a of 27X1 is closed.

When the low voltage is restored by this procedure, the breaker is automatically turned on after a certain time. Therefore, the personnel in charge are not necessary, and if such proper conditions are met, the breaker can be automatically supplied without the labor of the personnel, so that electric power can be supplied.

Next, the operation will be described when an image formation occurs in one of phases A, B, and C during automatic operation.

If an image formation occurs, the POR in the dotted box indicated by reference numeral 3 in FIG. 1 operates in response to the contact point a of the POR relay.

As a result, the 47X relay is excited and the a contact of 47X is input.

The contact a of 47X is input and the 86X relay is excited.

As the contact a of the 86X is inputted, the breaker enters the trip state. That is, when an open phase occurs, the breaker is turned off by the POR relay.

Recovery is achieved by eliminating the cause of the missing phase with the breaker off, followed by the missing phase recovery procedure. This is done automatically according to the invention as follows.

As the phase is restored, the POR will automatically return the POR contact in response and the coil of the 47X relay will break.

Then, the a contact of 47X returns, 86X is broken down, and the a contact returns.

Subsequently, the b contact of 47X returns and the 27T relay is excited.

After a certain time, for example, 3 to 10 seconds, the a contact of the 27T relay is turned on to excite the 27X1 relay (see in dashed box indicated by reference numeral 1 in FIG. 1).

The breaker is closed when the contact a of 27X1 is closed.

When the phase is recovered from the phase loss, the breaker is automatically turned on after a certain time. Therefore, the breaker is automatically turned on without the labor of the person in charge, so that the power can be supplied.

The automatic input device of the high-voltage switchgear breaker according to the present invention, for example, when the premises breaker operates when the power supply side power failure, and the power is restored, when the power is restored, the circuit breaker as described above when there is no abnormality due to the operation of the relays in the automatic input device. Likewise, for example, three channels of 10 seconds, suitably 8 seconds, can be added automatically.

By the circuit breaker automatic injection device of the present invention can obtain the following results.

In some cases, the voltage may still return after the UVR is activated due to the low voltage. Then, as described above, since the breaker is kept in the trip state, no re-injection is performed, and there is no fear that low-input is supplied. After the UVR returns, after the voltage returns, the breaker can be turned on automatically after 10 seconds as mentioned.

Even after the POR operation, there may be a return from the open phase. Then, as mentioned above, the circuit breaker is not re-inserted while the trip state is maintained. If the POR returns from the open phase after operation, power can be automatically supplied after 10 seconds.

This reduction in power outage time can lead to an increase in revenue, for example, due to an increase in sales power, for example, 7,631,087 kWH / year. Of course, the consumer can resolve the inconvenience of a power outage by prompt recovery.

1 is a detailed circuit diagram of a high-voltage switchgear breaker having an automatic input function of a breaker according to the present invention.

Claims (7)

In the high-voltage switchgear breaker is installed as a distribution line for delivering the supply power to the customer, For overcurrent blocking, overcurrent breakers 51R, 51S, 51T operated in response to the occurrence of a fault and a relay 86X thereby switching the breaker into a trip state; An undervoltage relay (UVR) operating in response to a low voltage occurrence, the undervoltage relay in response to the relay 86X operating to switch the breaker to a trip state; In response to the low voltage recovery, the relay 27T is excited to return the UVR to be excited after a predetermined time and automatically turn on the circuit breaker. Including, high-voltage switchgear breaker. In the high-voltage switchgear breaker is installed as a distribution line for delivering the supply power to the customer, For overcurrent blocking, overcurrent breakers 51R, 51S, 51T operated in response to the occurrence of a fault and a relay 86X thereby switching the breaker into a trip state; An imaging protection relay (POR) operated in response to one of three phases of the power supply, and the imaging protection relay (POR) corresponding to the relay 86X operating to switch the circuit breaker to a tripping state. , In response to the phase recovery, in response to the POR, the relay 27T is excited after a predetermined time and automatically turns on the circuit breaker. Including, high-voltage switchgear breaker. The method according to claim 1 or 2, And an auto-manual selection switch associated with the automatically input relay, adapted to automatically or manually input the breaker by the auto-manual selection switch. The method according to claim 1 or 2, The predetermined time is 3 to 10 seconds. In the high-voltage switchgear breaker is installed as a distribution line for delivering the supply power to the customer, For overcurrent blocking, overcurrent breakers 51R, 51S, 51T operated in response to the occurrence of a fault and a relay 86X thereby switching the breaker into a trip state; An undervoltage relay (UVR) operating in response to a low voltage occurrence, the undervoltage relay (86X) operating in response to the undervoltage relay for switching the breaker to a trip state; An image protection protection relay (POR) operated in response to one of three phases of the power supply, and in response to the image protection protection relay (POR) operating the relay 86X to switch the circuit breaker to a trip state; , In response to a low voltage recovery or an image recovery, the relay 27T returns the UVR or the POR to excite after a predetermined time in response to the UVR or the POR. Including, high-voltage switchgear breaker. The method of claim 5, And an auto-manual selection switch associated with the automatically input relay, adapted to automatically or manually input the breaker by the auto-manual selection switch. The method of claim 5, The predetermined time is 3 to 10 seconds.

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