阅读说明：本技术 一种进出线间隔带旁路隔离开关的组合电器 (Combined electrical apparatus with bypass isolating switch at incoming and outgoing line interval ) 是由 柳如见 邓东印 梁孝峰 黄娇 姚龙元 公栋梁 于 2020-07-17 设计创作，主要内容包括：本发明涉及一种进出线间隔带旁路隔离开关的组合电器,包括第一母线和第二母线,第二接线的其中一端与第二母线连接,另一端与电缆终端连接；在第二接线上距离第二母线由近及远顺序连接第二隔离开关、断路器、第三隔离开关和电流互感器；在第二接线上连接第一检修接地开关、第二检修接地开关和第三检修接地开关,第一检修接地开关连接在第二隔离开关和断路器之间,第二检修接地开关连接在断路器和第三隔离开关之间,第三检修接地开关连接在第三隔离开关和电流互感器之间。达到了断路器检修时虽然主回路停电但本间隔依然可以通过旁路供电的目的。(The invention relates to a combined electrical apparatus with a bypass isolating switch at an inlet-outlet line interval, which comprises a first bus and a second bus, wherein one end of a second connection line is connected with the second bus, and the other end of the second connection line is connected with a cable terminal; a second disconnecting switch, a circuit breaker, a third disconnecting switch and a current transformer are sequentially connected to the second wiring from near to far away from the second bus; and the first overhauling grounding switch, the second overhauling grounding switch and the third overhauling grounding switch are connected on the second wiring, the first overhauling grounding switch is connected between the second isolating switch and the circuit breaker, the second overhauling grounding switch is connected between the circuit breaker and the third isolating switch, and the third overhauling grounding switch is connected between the third isolating switch and the current transformer. The purpose that the power can still be supplied through the bypass at the interval although the main loop is powered off during the maintenance of the circuit breaker is achieved.)

1. The utility model provides a business turn over line interval takes combined electrical apparatus of bypass isolator which characterized in that: the first bus and the second bus are included, one end of the second wiring is connected with the second bus, and the other end of the second wiring is connected with the cable terminal; a second disconnecting switch, a circuit breaker, a third disconnecting switch and a current transformer are sequentially connected to the second wiring from near to far away from the second bus; a first overhauling grounding switch, a second overhauling grounding switch and a third overhauling grounding switch are connected to the second wiring, the first overhauling grounding switch is connected between the second isolating switch and the circuit breaker, the second overhauling grounding switch is connected between the circuit breaker and the third isolating switch, and the third overhauling grounding switch is connected between the third isolating switch and the current transformer;

a third connection wire is connected to the second connection wire and is connected between the current transformer and the cable terminal, and a fifth isolating switch, a fourth overhauling grounding switch, a lightning arrester and a voltage transformer are sequentially connected to the third connection wire from near to far away from the second connection wire;

one end of the first wiring is connected with the first bus, the other end of the first wiring is connected with the second wiring, and the connecting position of the first wiring and the second wiring is the same as the connecting position of the first overhauling grounding switch; a first isolating switch is connected to the first connection wire; a fourth connection wire is connected to the first connection wire, and the connection position is located between the first isolating switch and the first bus; the other end of the fourth connection wire is connected with the second connection wire, and the connection position is located between the third overhauling grounding switch and the current transformer; and a fourth isolating switch is connected to the fourth connection wire.

2. The combined electrical apparatus with the bypass isolating switch at the incoming and outgoing line interval as claimed in claim 1, wherein: the circuit breaker is vertical structure, and the circuit breaker includes the last outlet and the lower outlet that level and upper and lower set up.

3. The combined electrical apparatus with the bypass isolating switch at the incoming and outgoing line interval as claimed in claim 2, wherein: the lower wire outlet is connected with the first bus, the second bus, the first isolating switch, the second isolating switch and the first overhauling grounding switch; the upper wire outlet is connected with a third isolating switch, a fourth isolating switch, a current transformer, a second overhauling grounding switch and a third overhauling grounding switch; and a fifth isolating switch, a fourth overhauling grounding switch, a lightning arrester and a voltage transformer are arranged on one side of the current transformer, which is far away from the fourth isolating switch.

4. The combined electrical apparatus with the bypass isolating switch at the incoming and outgoing line interval as claimed in claim 3, wherein: the lightning arrester and the voltage transformer are both vertically arranged.

Technical Field

The invention relates to a combined electrical apparatus, in particular to a combined electrical apparatus with a bypass isolating switch at an incoming and outgoing line interval.

Background

Along with the application of outdoor combined electrical apparatus more and more, the reliability requirement of equipment operation is higher and more, and this interval also does not allow the power failure when requiring business turn over line interval circuit breaker to overhaul under some state. The business turn over line interval of current two bus connection forms only has 1 return circuit from generating line to business turn over line side, when core electrical component circuit breaker need overhaul, this interval need have a power failure just can carry out the maintenance work of circuit breaker, has influenced the operation of this interval circuit or main transformer.

In order to meet the power failure maintenance requirement, an incoming and outgoing line interval with an isolating switch bypass is designed. The existing incoming and outgoing line interval is not provided with a bypass, the interval is required to be powered off when the breaker is overhauled, certain power failure loss can be caused, the whole interval of the breaker overhauling interval is prevented from being powered off by the scheme, and the requirement that the breaker is overhauled without power failure is well met.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a combined electrical appliance with a bypass isolating switch at an incoming and outgoing line interval.

The invention is realized by the following technical scheme, and provides a combined electrical apparatus with a bypass isolating switch at an incoming and outgoing line interval, which comprises a first bus and a second bus, wherein one end of a second connection line is connected with the second bus, and the other end of the second connection line is connected with a cable terminal; a second disconnecting switch, a circuit breaker, a third disconnecting switch and a current transformer are sequentially connected to the second wiring from near to far away from the second bus; a first overhauling grounding switch, a second overhauling grounding switch and a third overhauling grounding switch are connected to the second wiring, the first overhauling grounding switch is connected between the second isolating switch and the circuit breaker, the second overhauling grounding switch is connected between the circuit breaker and the third isolating switch, and the third overhauling grounding switch is connected between the third isolating switch and the current transformer;

a third connection wire is connected to the second connection wire and is connected between the current transformer and the cable terminal, and a fifth isolating switch, a fourth overhauling grounding switch, a lightning arrester and a voltage transformer are sequentially connected to the third connection wire from near to far away from the second connection wire;

one end of the first wiring is connected with the first bus, the other end of the first wiring is connected with the second wiring, and the connecting position of the first wiring and the second wiring is the same as the connecting position of the first overhauling grounding switch; a first isolating switch is connected to the first connection wire; a fourth connection wire is connected to the first connection wire, and the connection position is located between the first isolating switch and the first bus; the other end of the fourth connection wire is connected with the second connection wire, and the connection position is located between the third overhauling grounding switch and the current transformer; and a fourth isolating switch is connected to the fourth connection wire.

Preferably, the circuit breaker is of a vertical structure and comprises an upper outlet and a lower outlet which are horizontally and vertically arranged.

Preferably, the lower outlet is connected with the first bus, the second bus, the first isolating switch, the second isolating switch and the first overhauling grounding switch; the upper wire outlet is connected with a third isolating switch, a fourth isolating switch, a current transformer, a second overhauling grounding switch and a third overhauling grounding switch; and a fifth isolating switch, a fourth overhauling grounding switch, a lightning arrester and a voltage transformer are arranged on one side of the current transformer, which is far away from the fourth isolating switch.

Preferably, the lightning arrester and the voltage transformer are both vertically arranged.

The invention has the beneficial effects that:

1. before the circuit breaker overhauls, closed this bypass fourth isolator, then with circuit breaker, first isolator, second isolator and the third isolator separating brake on this interval major loop, overhaul earthing switch and second with first and second and overhaul earthing switch combined floodgate, guarantee business turn over line outside third and overhaul earthing switch separating brake, the circuit breaker withdraws from the operation, can carry out the maintenance work of circuit breaker, keeps apart the electrified operation of bypass simultaneously, guarantees the normal operating of business turn over line side.

2. This application has designed a bypass, when the circuit breaker overhauls, has realized the effect of business turn over line side through this bypass power supply through operation this interval major loop and bypass isolation earthing switch. The purpose that although the main loop is powered off when the circuit breaker is overhauled, the interval still can be supplied with power through the bypass is achieved, the voltage transformer and the lightning arrester are additionally arranged, the isolating switch and the grounding switch are arranged on the main loop and the grounding switch, and the space structure of the incoming and outgoing lines is optimized, so that the space occupied area of the incoming and outgoing lines is small, and the structure is reasonable.

3. The maintenance interval of the most important electrical component of the combined electrical appliance, namely the breaker, is ensured to be uninterrupted, and the loss caused by equipment maintenance is greatly saved in long term, so that the economic significance and the social value are considerable.

Drawings

FIG. 1 is a wiring diagram of an electrical appliance of the present invention;

FIG. 2 is a schematic structural view of the present invention;

shown in the figure:

1. second bus, 2, first bus, 3, second wiring, 4, first wiring, 5, second isolator, 6, first maintenance earthing switch, 7, first isolator, 8, fourth wiring, 9, fourth isolator, 10, circuit breaker, 11, second maintenance earthing switch, 12, third isolator, 13, third maintenance earthing switch, 14, current transformer, 15, cable termination, 16, fifth isolator, 17, fourth maintenance earthing switch, 18, voltage transformer, 19, arrester.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

As shown in fig. 1 and 2, the present invention includes a first bus bar 2 and a second bus bar 1. One end of the second wiring 3 is connected to the second bus bar 1, and the other end is connected to the cable terminal 15. A second disconnector 5, a circuit breaker 10, a third disconnector 12 and a current transformer 14 are connected in this order from near to far from the second busbar 1 on the second connection 3. The first maintenance grounding switch 6, the second maintenance grounding switch 11 and the third maintenance grounding switch 13 are connected to the second wiring 3, the first maintenance grounding switch 6 is connected between the second isolating switch 5 and the circuit breaker 10, the second maintenance grounding switch 11 is connected between the circuit breaker 10 and the third isolating switch 12, and the third maintenance grounding switch 13 is connected between the third isolating switch 12 and the current transformer 14.

And a third wiring is connected to the second wiring 3, the third wiring is connected between the current transformer 14 and the cable terminal 15, and a fifth isolating switch 16, a fourth maintenance grounding switch 17, a lightning arrester 19 and a voltage transformer 18 are connected to the third wiring from near to far from the second wiring 3 in sequence.

One end of the first wiring 4 is connected with the first bus bar 2, the other end of the first wiring is connected with the second wiring 3, and the connecting position of the first wiring 4 and the second wiring 3 is the same as that of the first maintenance grounding switch 6. A first disconnector 7 is connected to the first connection 4. A fourth connection 8 is connected to the first connection 4 at a position between the first disconnector 7 and the first busbar 2. The other end of the fourth connection line 8 is connected with the second connection line 3 at a connection position between the third service earthing switch 13 and the current transformer 14. A fourth disconnection switch 9 is connected to the fourth connection 8.

Before the circuit breaker 10 overhauls, closed this bypass fourth isolator 9, then with circuit breaker 10 on this interval major loop, first isolator 7, second isolator 5 and third isolator 12 separating brake, overhaul earthing switch 6 with the second and overhaul earthing switch 11 combined floodgate, ensure business turn over line outside third and overhaul earthing switch 13 separating brake, circuit breaker 10 withdraws from the operation, can carry out the maintenance work of circuit breaker 10, keep apart the electrified operation of bypass simultaneously, guarantee the normal operating of business turn over line side.

As shown in fig. 2, in the present embodiment, the circuit breaker 10 is a vertical structure, and the circuit breaker 10 includes an upper outlet and a lower outlet which are horizontally and vertically disposed. The lower outlet is connected with the first bus 2, the second bus 1, the first isolating switch 7, the second isolating switch 5 and the first overhauling grounding switch 6. The upper outlet is connected with a third isolating switch 12, a fourth isolating switch 9, a current transformer 14, a second overhauling grounding switch 11 and a third overhauling grounding switch 13. And a fifth isolating switch 16, a fourth overhauling grounding switch 17, an arrester 19 and a voltage transformer 18 are arranged on one side of the current transformer 14, which is far away from the fourth isolating switch 9. The lightning arrester 19 and the voltage transformer 18 are both vertically arranged.

Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.