CN208257397U - A kind of spare power automatic switching system - Google Patents

Abstract

The utility model provides a kind of spare power automatic switching system, including at least one incoming line module and a mother module, incoming line module includes end of incoming cables and the coil for being connected to the voltage relay in each phase of incoming line module or between each phase line, the coil of the normally opened contact of all voltage relays and a time-delay relay be connected in series on any phase line or wantonly two phase line between；The normally-closed contact string of time-delay relay is located in the closing circuit of mother module.When line cabinet breaker end of incoming cables occurs under-voltage, circuit breaker tripping tripping, the normally opened contact of voltage relay restores to disconnect, time-delay relay starts timing, time one arrives time-delay relay coil losing electricity, and the normally-closed contact of time-delay relay restores closure, closing circuit lock release, and closing circuit will charge always to failure side primary voltage and restore, normal side inlet wire is to two sections of power supplies at this time.It needs first to carry out sub-switching operation to contact cabinet after voltage recovery, then close a floodgate again, two sections of realization is independently-powered again.

Description

A kind of spare power automatic switching system

Technical field

The utility model belongs to low-voltage power supply technical field, and in particular to a kind of spare power automatic switching system.

Background technique

In low-voltage power supply system now, usual power supply use two inlet wires, one mother power supply mode, low pressure into When a certain section of power supply system of line breaks down, reliably can put into interconnection switch is the key that guarantee power supply uninterrupted power supply, one As select backup auto-activating device to control the switching of power supply.Main backup auto-activating device domestic at present apply to 35Kv and 110Kv single busbar connection type, backup auto-activating device greatly improve the performance factor of backup auto-activating device with female poor device cooperation, And low-voltage distribution is partially due to power supply reliability is high, does not also use backup auto-activating device generally, but with a large amount of construction of converter station, 400v load in standing is more important, directly affects the normal operation of a direct current, therefore generally existing low pressure system in converter station System uses backup auto-activating device.But backup auto-activating device is expensive, and volume is big, the occupancy excessive space of power distribution cabinet, and simple economy Spare power automatic switching system will more and more be applied.

Utility model content

The purpose of this utility model is to provide a kind of spare power automatic switching systems, big for solving backup auto-activating device volume, occupy The problem of excessive space.

In order to solve the above technical problems, the utility model provides a kind of spare power automatic switching system, including at least one inlet wire mould Block and a mother module, incoming line module include end of incoming cables and for being connected in each phase of incoming line module or between each phase line The coil of the coil of voltage relay, the normally opened contact of all voltage relays and a time-delay relay is connected in series in any On phase line or between wantonly two phase line；The normally-closed contact string of time-delay relay is located in the closing circuit of mother module.

The utility model has the beneficial effects that

When incoming line cabinet end of incoming cables occurs under-voltage, circuit breaker tripping tripping, voltage relay normally opened contact restores to disconnect, and prolongs When relay start timing, the time one arrives time-delay relay coil losing electricity, and time-delay relay normally-closed contact restores closure, gets in touch with cabinet Closing circuit lock release obtains electric closure；And closing circuit will charge always to failure side primary voltage and restore, normal side at this time Inlet wire is to two sections of power supplies.It needs first to carry out sub-switching operation to contact cabinet after voltage recovery, then closes a floodgate again, realize two sections again It is independently-powered.Ensure that power supply system operate normally because spare power automatic switching system provided by the utility model in most simple situation only Three relays have been used, the power distribution cabinet space occupied because backup auto-activating device volume is excessive is saved.

Further, more than two incoming line modules are respectively corresponded equipped with corresponding time-delay relay, each time-delay relay Normally-closed contact it is in parallel.

Detailed description of the invention

Fig. 1 is the power supply plan schematic diagram of two inlet wires, one mother；

Fig. 2 is the corresponding incoming line module electric hookup of L01 inlet wire；

Fig. 3 is the corresponding incoming line module electric hookup of L02 inlet wire；

Fig. 4 is mother module closing circuit electrical connection diagram.

Specific embodiment

To keep the purpose of this utility model, technical solution and advantage clearer, with reference to the accompanying drawings and embodiments, to this Utility model is described in further detail.

In low-voltage power supply system, as shown in Figure 1, there are electric interlocks between two incoming line cabinets and a contact cabinet.Two Incoming line cabinet respectively corresponds inlet wire L01 and L02.

Such as the carry out cabinet that Fig. 2 is L01 inlet wire, end of incoming cables includes A phase, B phase and C phase, wherein the access one alternate with B of A phase The coil of voltage relay 11YJ, B phase and C it is alternate between access the coil of a voltage relay 12YJ, end of incoming cables A phase and C phase Between the normally opened contact of two voltage relays of series connection and the coil of a time-delay relay 1ZJ.As shown in figure 4, mother module The normally-closed contact of time-delay relay 1ZJ and closing coil are connected in series in closing circuit.

Such as the carry out cabinet that Fig. 3 is L02 inlet wire, end of incoming cables includes A phase, B phase and C phase, wherein the access one alternate with B of A phase The coil of voltage relay 21YJ, B phase and C it is alternate between access the coil of a voltage relay 22YJ, end of incoming cables A phase and C phase Between the normally opened contact of two voltage relays of series connection and the coil of a time-delay relay 2ZJ.As shown in figure 4, mother module The normally-closed contact of time-delay relay 2ZJ and closing coil are connected in series in closing circuit.

When voltage is normal, it is electric that the normally opened contact of voltage relay closure obtains time-delay relay coil, be delayed at this time after The normally-closed contact of electric appliance remains off.

When under-voltage, voltage relay normally opened contact recovery disconnection, time-delay relay coil occurs in a certain incoming line cabinet end of incoming cables Power loss, time-delay relay start timing until the normally-closed contact of time-delay relay restores closure；Contact cabinet closing switch obtains at this time Electricity closure, normal side inlet wire realize prepared auto restart to two sections of power supplies.

Such as L01 incoming line cabinet end of incoming cables occur it is under-voltage, as shown in Fig. 2, when incoming line cabinet end of incoming cables voltage is normal, voltage after The positive often-have-electricity of the coil of electric appliance 11YJ, 12YJ, normally opened contact closure, the coil of time-delay relay 1ZJ obtains electric at this time, delay after The normally-closed contact of electric appliance 1ZJ disconnects, and the closing circuit in Fig. 4 mother module is in blocking at this time, can not operate, two sections into Line is independently-powered.When inlet wire cabinet breaker end of incoming cables occurs under-voltage, the normally opened contact of voltage relay 11YJ, 12YJ restore disconnected It opens, time-delay relay 1ZJ coil losing electricity, time-delay relay 1ZJ starts timing until the normally-closed contact of time-delay relay 1ZJ restores Closure, contact cabinet closing switch HA are closed, and closing circuit lock release in mother module, closing circuit will charge always to failure Side primary voltage restores, and normal side inlet wire first carries out sub-switching operation to contact cabinet after voltage recovery, so to two sections of power supplies at this time It closes a floodgate and threads off again afterwards, two sections of realization is independently-powered again.

Similarly, L02 incoming line cabinet end of incoming cables occurs under-voltage, as shown in figure 3, when incoming line cabinet end of incoming cables voltage is normal, voltage The positive often-have-electricity of the coil of relay 21YJ, 22YJ, normally opened contact closure, the coil of time-delay relay 2ZJ obtains electric at this time, delay The normally-closed contact of relay 2ZJ disconnects, and the closing circuit in Fig. 4 mother module is in blocking at this time, can not operate, two sections Inlet wire is independently-powered.When inlet wire cabinet breaker end of incoming cables occurs under-voltage, the normally opened contact of voltage relay 21YJ, 22YJ restore It disconnects, time-delay relay 2ZJ coil losing electricity, time-delay relay 2ZJ starts timing until the normally-closed contact of time-delay relay 2ZJ is extensive Reclosing is closed, contact cabinet closing switch HA closure, and closing circuit lock release in mother module, closing circuit will charge always to event Hindering side primary voltage to restore, normal side inlet wire first carries out sub-switching operation to contact cabinet after voltage recovery to two sections of power supplies at this time, Then it closes a floodgate and threads off again, two sections of realization is independently-powered again.

This system, which can also be extended to, is connected to the coil of voltage relay between A phase and C phase, C phase and B phase；In addition, If voltage relay can be directly connected to each phase line to detect the phase voltage of each phase using three-phase and four-line.

It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that on The description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, for A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appended Claim limit.

Claims (2)

1. a kind of spare power automatic switching system, including at least one incoming line module and a mother module, which is characterized in that the inlet wire mould Block includes end of incoming cables and the coil for being connected to the voltage relay in each phase of incoming line module or between each phase line, Suo Yousuo The coil of the normally opened contact and a time-delay relay of stating voltage relay is connected in series on any phase line or wantonly two phase line Between road；The normally-closed contact string of the time-delay relay is located in the closing circuit of mother module.

2. a kind of spare power automatic switching system according to claim 1, which is characterized in that more than two incoming line modules respectively correspond Equipped with corresponding time-delay relay, the normally-closed contact of each time-delay relay is in parallel.