CN203225458U

CN203225458U - Low voltage switch cabinet power down automatic connection system

Info

Publication number: CN203225458U
Application number: CN 201320219807
Authority: CN
Inventors: 刘永斌; 刘永林; 陈刚
Original assignee: WUHAN SHENYU ELECTRIC Co Ltd
Current assignee: WUHAN SHENYU ELECTRIC Co Ltd
Priority date: 2013-04-26
Filing date: 2013-04-26
Publication date: 2013-10-02
Anticipated expiration: 2023-04-26

Abstract

The utility model relates to a low voltage switch cabinet, and specially relates to a low voltage switch cabinet power down automatic connection system used for electrical interlocks of two low voltage incoming line cabinets and a contact cabinet. The system comprises a low voltage incoming line cabinet time-delay control circuit and a contact cabinet breaker control circuit; the low voltage incoming line cabinet time-delay control circuit comprises a time relay KT, a first breaker 1QF for controlling the first low voltage incoming line cabinet and a third breaker 3QF for controlling the second low voltage incoming line cabinet; the first breaker 1QF and the third breaker 3QF are in parallel and then are in series with the time relay KT; the contact cabinet breaker control circuit comprises a second breaker 2QF for controlling the contact cabinet, a control source supplies power to closing coils of the second breaker 2QF through normal open contacts of the time relay KT, thereby making the second breaker 2QF be switched on and connected to the contact cabinet. The system solves the problem that single transformer cannot automatically connect to the contact cabinet after power down.

Description

The low-tension switch cabinet power down is from the input system

Technical field

The utility model relates to low-tension switch cabinet, specifically be a kind of for the low-tension switch cabinet power down of electrical interlock between two low pressure incoming line cabinets and the contact cabinet from the input system.

Background technology

In circuit, there are two inlet wire transformers, during mother's connection cabinet, tackle it and carry out interlocked control, namely three switch cubicles can not move simultaneously, address this problem the circuit breaker that generally can give in the cabinet and install the mechanical interlocking of three locks, two keys and the electrical interlock of the normally closed point of mutual connection additional.But before transformer is devoted oneself to work again, must want operating personnel to stop female connection cabinet earlier according to operation sequence, if not can the generation accident.

Summary of the invention

The purpose of this utility model is to provide a kind of low-tension switch cabinet power down from the input system, solves the problem that can't drop into the contact cabinet automatically after the single transformer power down.

For realizing above utility model purpose, the technical solution of the utility model is: the low-tension switch cabinet power down is from the input system, its system comprises low pressure incoming line cabinet time-delay control loop, contact cabinet breaker control loop, described low pressure incoming line cabinet time-delay control loop comprises time relay KT, be used for the first circuit breaker 1QF of the control first low pressure incoming line cabinet, be used for the 3rd circuit breaker 3QF of the control second low pressure incoming line cabinet, connects with time relay KT after the first circuit breaker 1QF, the 3rd circuit breaker 3QF parallel connection; Contact cabinet breaker control loop comprises the second circuit breaker 2QF for control contact cabinet, the control power supply is given the closing coil power supply of the second circuit breaker 2QF by the normally opened contact of time relay KT, thereby makes the second circuit breaker 2QF breaker closing drop into the contact cabinet.

Three locks, the two key mechanical interlocks of the utility model cancellation incoming line cabinet, contact cabinet breaker have realized that the single transformer power down can drop into the contact cabinet automatically, and it is charged that the loop is continued, and do not influence on-the-spot power supply; Increased time relay loop, realize the single transformer power down former so can be that whole loop has electricity, the transformer back operating personnel strictness complete operation in operation sequence of sending a telegram here again.

Description of drawings

Fig. 1 drops into the circuit diagram of system certainly for the power down of the utility model embodiment low-tension switch cabinet.

Embodiment

As shown in Figure 1, the power down of the utility model embodiment low-tension switch cabinet is from the input system, comprise low pressure incoming line cabinet time-delay control loop, contact cabinet breaker control loop, described low pressure incoming line cabinet time-delay control loop comprises time relay KT, be used for the first circuit breaker 1QF of the control first low pressure incoming line cabinet, be used for the 3rd circuit breaker 3QF of the control second low pressure incoming line cabinet, connects with time relay KT after the first circuit breaker 1QF, the 3rd circuit breaker 3QF parallel connection; Contact cabinet breaker control loop comprises the second circuit breaker 2QF for control contact cabinet, the first control power supply U1 or the second control power supply U2 give the closing coil power supply of the second circuit breaker 2QF by the normally opened contact of time relay KT, thereby make the second circuit breaker 2QF breaker closing drop into the contact cabinet.

When dead electricity among the first circuit breaker 1QF or the 3rd circuit breaker 3QF, time relay KT gets, picked up counting 4 seconds, the KT closing of contact after 4 seconds in contact cabinet breaker control loop, the closing coil power supply that control power supply U1 or the second control power supply U2 entered control loop and gave the second circuit breaker 2QF through the KT contact this moment first, the second circuit breaker 2QF breaker closing, whole loop is just charged; When the first circuit breaker 1QF or the 3rd circuit breaker 3QF restored electricity, can't close a floodgate this moment, can only the second circuit breaker 2QF outage earlier with the contact cabinet after, the first circuit breaker 1QF or the 3rd circuit breaker 3QF could close a floodgate again.

Above content is the further instruction of the utility model being done in conjunction with concrete execution mode, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.

Claims

1. the low-tension switch cabinet power down is from the input system, it is characterized in that: its system comprises low pressure incoming line cabinet time-delay control loop, contact cabinet breaker control loop, described low pressure incoming line cabinet time-delay control loop comprises the time relay (KT), be used for first circuit breaker (1QF) of the control first low pressure incoming line cabinet, be used for the 3rd circuit breaker (3QF) of the control second low pressure incoming line cabinet, connects with the time relay (KT) in first circuit breaker (1QF), the 3rd circuit breaker (3QF) back in parallel; Contact cabinet breaker control loop comprises second circuit breaker (2QF) for control contact cabinet, the control power supply is given the closing coil power supply of second circuit breaker (2QF) by the normally opened contact of the time relay (KT), thereby makes second circuit breaker (2QF) breaker closing drop into the contact cabinet.