CN223885178U

CN223885178U - A contact extension circuit for ATS

Info

Publication number: CN223885178U
Application number: CN202520412987.1U
Authority: CN
Inventors: 常治青; 贺帅; 闫璐; 张喆
Original assignee: Schneider Wingoal Tianjin Electric Equipment Co Ltd
Current assignee: Schneider Wingoal Tianjin Electric Equipment Co Ltd
Priority date: 2025-03-11
Filing date: 2025-03-11
Publication date: 2026-02-06
Anticipated expiration: 2035-03-11

Abstract

The utility model provides a contact expanding circuit for an ATS, which belongs to the technical field of ATS and comprises an auxiliary contact and a relay, wherein the relay comprises a relay coil and a relay contact, the auxiliary contact comprises a public end and a normally open point, an OFF signal in a switch is connected to the relay coil, and the auxiliary contact is arranged between an input end of the OFF signal and the relay coil. The utility model utilizes the auxiliary contact OFF and the relay to build the expansion circuit, has low cost, reliable principle and simple circuit, does not need other switch devices to control except the auxiliary contact OFF and the relay, greatly improves the cost optimization, and meets the use scenes of insufficient contact quantity and more functional requirements.

Description

Contact expanding circuit for ATS

Technical Field

The utility model belongs to the technical field of ATS, and particularly relates to a contact expanding circuit for ATS.

Background

ATS (Automatic TRANSFER SWITCH, ATS) is an Automatic transfer switching device, which is mainly used to automatically switch a load from one power source to another. When the normal power utilization system encounters a fault to stop power supply, the ATS automatically connects the load circuit to another standby power supply so as to ensure that the connected equipment can continue to operate normally and uninterruptedly.

Products in industrial settings often use auxiliary contacts, but the number of auxiliary contacts is limited due to volume and cost constraints. In ATS products the PC grade switch often uses an OFF auxiliary contact, typically to indicate the current state of the switch, and in CB grade products there are an SDE auxiliary contact (fault indication contact), an SD auxiliary contact (trip indication contact) in addition to the OFF contact, to indicate whether the switch has an electrical fault.

The general PC-level ATS has two groups of OFF contacts, one group is reserved for a user, the user can conveniently detect the state of the switch, and the switch is convenient to instruct and manage, and the other group is used as an instruction of the controller. However, the general switch needs to be provided with electric interlocking and mechanical interlocking, so that the switch is ensured not to have double-closing phenomenon. At this time, the number of the OFF contacts needs to be used as an electrical interlock and also needs to be used as a controller to indicate that the main circuit is a strong electrical signal, and the controller needs to consider the problems of voltage reduction and insulation during indication, which can increase difficulty in designing a circuit. And when the OFF contact is unstable, an erroneous indication may be caused. The same is true when SDE auxiliary contacts and SD auxiliary contacts are involved in a CB-level switch.

Therefore, there is a need for an ATS contact expansion circuit that is simple in circuit, more reliable, and capable of satisfying the safety insulation.

Disclosure of utility model

The utility model aims to solve the problem of providing a fault output and alarm circuit for an ATS.

In order to solve the technical problems, the technical scheme is that the contact expanding circuit for the ATS comprises an auxiliary contact and a relay, wherein the relay comprises a relay coil and a relay contact, the auxiliary contact comprises a public end and a normally open point, an OFF signal in a switch is connected to the relay coil, and the auxiliary contact is arranged between an input end of the OFF signal and the relay coil.

Further, the relay is a normally open relay.

Further, when the relay is set to one, the pins of the relay coil are connected with the auxiliary contacts. When the body switch is switched on, the common end of the auxiliary contact is conducted with the normally open point, the relay coil acts, the contact of the relay is changed from the normally open point to the normally closed point, and an OFF signal is directly transmitted to the controller.

Further, when the number of the relays is two, the pins of the two relay coils are connected in parallel and then connected with the auxiliary contacts. When the body switch is switched on, the common end of the auxiliary contact is conducted with the normally open point, the two relay coils act simultaneously, the contacts of the two relays are changed from normally open points to normally closed points, signals of the auxiliary contact are not directly connected into the controller any more, and the signals of the relays are connected into the controller for state identification.

By adopting the technical scheme, the utility model has the following beneficial effects:

The utility model utilizes the auxiliary contact OFF and the relay to build the expansion circuit, has low cost, reliable principle and simple circuit, does not need to use switch devices such as a triode, a MOS tube and the like to control except the auxiliary contact OFF and the relay, greatly improves the cost optimization, and meets the use scenes of insufficient contact quantity and more functional requirements.

Drawings

The advantages and the manner of carrying out the utility model will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which the content shown is meant to illustrate, but not to limit, the utility model in any sense, and wherein:

fig. 1 is a circuit schematic of embodiment 1 of the present utility model.

Fig. 2 is a circuit schematic of embodiment 2 of the present utility model.

Detailed Description

The utility model relates to a contact expanding circuit for an ATS, which comprises an auxiliary contact and a relay, wherein the relay comprises a relay coil and a relay contact, the auxiliary contact comprises a public end and a normally open point, an OFF signal in a switch is connected to the relay coil, and the auxiliary contact is arranged between an input end of the OFF signal and the relay coil.

Wherein the relay is a normally open relay.

Wherein, when the relay is set up to one, the pin of relay coil links to each other with auxiliary contact.

Further, when the body switch is switched on, the common end of the auxiliary contact is conducted with the normally open point, the relay coil acts, the contact of the relay is changed from the normally open point to the normally closed point, and an OFF signal is directly transmitted to the controller.

When the number of the relays is two, the pins of the relay coil are connected in parallel and then connected with the auxiliary contacts.

Further, when the body switch is switched on, the common end of the auxiliary contact is conducted with the normally open point, the two relay coils act simultaneously, the contacts of the two relays are changed from the normally open point to the normally closed point, signals of the auxiliary contact are not directly connected into the controller any more, and the signals of the relays are connected into the controller for state identification.

Working principle:

The OFF signal in the switch is connected to the relay coil, and the type of the contact of the relay is determined by the switching characteristic. The normally open point of the OFF signal is connected to the relay coil loop, and the relay is normally open.

The contact expansion circuit has two implementation modes, and mainly comprises two major parts of micro-motion type direct drive and relay expansion.

Example 1:

As shown in FIG. 1, when the body switch is switched on, the common end (COM) of the auxiliary contact OFF1 is conducted with the normally open point (NO), at this time, the RELAY RELAY1 coil acts, the contact 3 pin and the contact 4 pin of the RELAY RELAY1 are changed from the NO to the normally closed point (NC point), at this time, the OFF signal is directly fed into the controller, because the RELAY RELAY1 coil adopts a low-voltage weak current signal Vdd (the voltage range is 5-60V), the working voltage of the auxiliary contact OFF1 is the same as the voltage of the RELAY RELAY1 coil, the controller can normally identify the current switch state through an internal feedback loop, at this time, the contact 3 pin and the contact 4 pin signal of the RELAY RELAY1 can be connected in series into the main loop to be used as an interlocking, at this time, if the main loop after the RELAY RELAY1 fails, the RELAY is worry about abnormal operation, the RELAY can be used in parallel, and the insulation requirement of the distance between the coil and the contact can be reduced.

Example 2:

As shown in fig. 2, the RELAY2 and the RELAY3 are used in parallel, and when the body switch is closed, the COM end of the auxiliary contact OFF2 is conducted with the NO point, at the moment, the coil 1 pin and the coil 2 pin of the RELAY RELAY2 and the RELAY RELAY3 act simultaneously, the pins of the RELAY RELAY2, the contact 3 and the contact 4 of the RELAY RELAY3 are changed from NO to NC, and at the moment, the signal of the auxiliary contact OFF2 is not directly connected to the controller, but the signal of the RELAY is connected to the controller for state identification. Such as RELAY2 contacts, are used as the main loop interlock and RELAY3 contacts signal access controller is used as the status indication. At this time, the contact types of the two relays need to be selected in combination with the working principle of an actual circuit.

The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims

1. A contact extension circuit for an ATS, characterized in that: it includes an auxiliary contact and a relay, the relay includes a relay coil and a relay contact, the auxiliary contact includes a common terminal and a normally open terminal, the OFF signal in the switch is connected to the relay coil, and the auxiliary contact is disposed between the input terminal of the OFF signal and the relay coil.

2. The ATS contact extension circuit according to claim 1, characterized in that: when a relay is set to one, the pin of the relay coil is connected to the auxiliary contact.

3. The ATS contact extension circuit according to claim 2, characterized in that: when the main switch is closed, the common terminal of the auxiliary contact is connected to the normally open contact, the relay coil is activated, the relay contact changes from normally open to normally closed, and the OFF signal is directly transmitted to the controller.

4. The ATS contact expansion circuit according to claim 1, characterized in that: when two relays are set, the pins of the two relay coils are connected in parallel and then connected to the auxiliary contacts.

5. The ATS contact extension circuit according to claim 4, characterized in that: when the main switch is closed, the common terminal of the auxiliary contact is connected to the normally open contact, the two relay coils operate simultaneously, the contacts of the two relays change from normally open to normally closed, the signal of the auxiliary contact is no longer directly connected to the controller, and the signal of the relay is connected to the controller for status identification.