UPS fault alarm device

Abstract

The utility model discloses a UPS fault alarm device which comprises an incoming line monitoring relay, an input module of a decentralized control system and a monitoring computer, a control coil of the incoming line monitoring relay is connected with UPS incoming line voltage, one end of a normally closed contact of the incoming line monitoring relay is connected with a positive electrode of a power supply, and the other end of the normally closed contact is connected with a negative electrode of the power supply. The other end is connected with the input end of the input module of the distributed control system; the monitoring computer is installed in the operation room and is connected with the distributed control system. According to the utility model, the monitoring relay and the operation room monitoring computer are used for monitoring the fault of the uninterruptible power supply, and once the fault of the uninterruptible power supply, such as power failure and tripping, can be found by an operator in the operation room, and processing measures can be taken in time, so that production accidents caused by the exhaustion of the electric energy of the UPS battery can be effectively avoided; therefore, safe operation of an automatic system and power electronic equipment is ensured.

Description

Technical Field

[0001] This utility model relates to a UPS (Uninterruptible Power Supply) fault alarm device, which can issue an alarm signal when the UPS fails or the incoming line loses power, and belongs to the field of power supply technology. Background Technology

[0002] A UPS (Uninterruptible Power System) is primarily used to provide uninterrupted power to automated systems or power electronic equipment. When the mains input is normal, the UPS stabilizes the mains voltage and supplies it to the load. In this state, the UPS acts as an AC mains voltage regulator, simultaneously charging its internal battery. When the mains power is interrupted (power outage), the UPS immediately converts the energy from its internal battery into 220V AC power via an inverter, continuing to power the load and protecting its hardware and software from damage. When the UPS itself malfunctions, it automatically switches to bypass power supply mode, allowing the mains power to directly supply the load. In actual use, since UPS systems are often installed in the same location as their loads (such as DCS systems), operators cannot readily monitor their operation. If a UPS power outage or tripping occurs, and the load continues to be powered by the battery inverter, failure to detect the fault in time can lead to a serious production safety accident as the battery depletes and the load loses power completely. Therefore, designing a UPS fault alarm device is essential. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a UPS fault alarm device that can promptly detect and eliminate UPS incoming line faults, eliminate potential safety hazards, and ensure the safe operation of equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A UPS fault alarm device includes an incoming line monitoring relay, an input module of a distributed control system, and a monitoring computer. The control coil of the incoming line monitoring relay is connected to the UPS incoming line voltage. One end of the normally closed contact of the incoming line monitoring relay is connected to the positive terminal of the power supply, and the other end is connected to the input terminal of the input module of the distributed control system. The monitoring computer is installed in the control room and connected to the distributed control system.

[0006] The aforementioned UPS fault alarm device also includes a bypass monitoring relay. The control coil of the bypass monitoring relay is connected to the UPS bypass voltage. One end of the normally open contact of the bypass monitoring relay is connected to the positive terminal of the power supply, and the other end is connected to the input terminal of the input module of the distributed control system.

[0007] The aforementioned UPS fault alarm device also includes an outgoing line monitoring relay. The control coil of the outgoing line monitoring relay is connected to the UPS output voltage. One end of the normally closed contact of the outgoing line monitoring relay is connected to the positive terminal of the power supply, and the other end is connected to the input terminal of the input module of the distributed control system.

[0008] The aforementioned UPS fault alarm device also includes three air switches: the first air switch is connected in series with the control coil of the incoming line monitoring relay; the second air switch is connected in series with the control coil of the bypass monitoring relay; and the third air switch is connected in series with the control coil of the outgoing line monitoring relay.

[0009] This invention utilizes monitoring relays and a monitoring computer in the control room to monitor uninterruptible power supply (UPS) faults. Once the UPS experiences a power outage or tripping, the personnel in the control room can detect it and take timely measures. This effectively avoids production accidents caused by the depletion of UPS battery power, thereby ensuring the safe operation of automation systems and power electronic equipment. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is the electrical schematic diagram of the fault monitoring circuit of this utility model;

[0012] Figure 2 This is the electrical schematic diagram of the fault alarm circuit of this utility model.

[0013] The labels in the diagram are as follows: UPS, Uninterruptible Power Supply; FZ, Load; QF1, First Air Switch; QF2, Second Air Switch; QF3, Third Air Switch; KA1, Incoming Line Monitoring Relay; KA2, Bypass Monitoring Relay; KA3, Outgoing Line Monitoring Relay; KA1-1, Normally Closed Contact of Incoming Line Monitoring Relay; KA2-1, Normally Open Contact of Bypass Monitoring Relay; KA3-1, Normally Closed Contact of Outgoing Line Monitoring Relay; DCS, Input Module of Distributed Control System. Detailed Implementation

[0014] This invention addresses the shortcomings of existing technologies by providing a UPS fault alarm device. This device can perform online monitoring of the UPS incoming lines, outgoing lines, and bypass, and can promptly issue an alarm when a fault occurs. This device is low in cost, simple and practical in structure, has no adverse effects on the environment, personnel, or equipment, and is easy to install and operate, meeting the requirements for safe production.

[0015] See Figure 1 and Figure 2This utility model mainly includes three monitoring relays (i.e., incoming line monitoring relay KA1, bypass monitoring relay KA2, and outgoing line monitoring relay KA3), three air switches (i.e., first air switch QF1, second air switch QF2, and third air switch QF3), a distributed control system input module DCS, and a monitoring computer (not shown in the figure). The monitoring computer is installed in the control room and connected to the distributed control system. The control coil of the incoming line monitoring relay KA1 is connected to the UPS incoming voltage through the first air switch QF1; the control coil of the bypass monitoring relay KA2 is connected to the UPS bypass voltage through the second air switch QF2; and the control coil of the outgoing line monitoring relay KA3 is connected to the UPS output voltage through the third air switch QF3. One end of the normally closed contact KA1-1 of the incoming line monitoring relay is connected to the positive terminal of the power supply, and the other end is connected to the input terminal of the input module DCS of the distributed control system; one end of the normally open contact KA2-1 of the bypass monitoring relay is connected to the positive terminal of the power supply, and the other end is connected to the input terminal of the input module DCS of the distributed control system; one end of the normally closed contact KA3-1 of the outgoing line monitoring relay is connected to the positive terminal of the power supply, and the other end is connected to the input terminal of the input module DCS of the distributed control system; the positive terminal of the power supply is the power supply terminal of the input module DCS of the distributed control system, and the voltage is +DC24V.

[0016] The installation and use method of this utility model: The control coil of the first air switch QF1 and the incoming line monitoring relay KA1 are connected in series and then connected to the input voltage of the UPS. When the first air switch QF1 is closed, the UPS incoming line voltage acts on the control coil of the incoming line monitoring relay KA1, the normally closed contact KA1-1 of the incoming line monitoring relay opens, there is no digital input at the DI1 terminal of the input module DCS of the distributed control system, and the monitoring computer in the control room connected to the distributed control system displays that the incoming line is normal. When the UPS incoming line voltage fails, the control coil of the incoming line monitoring relay KA1 loses voltage, the normally closed contact KA1-1 of the incoming line monitoring relay closes, the DI1 terminal of the input module DCS of the distributed control system receives a digital signal, and the monitoring computer in the control room displays a UPS incoming line fault. The control coil of the bypass monitoring relay KA2 is connected in series with the second air switch QF2 and then connected to the bypass voltage of the UPS. When the second air switch QF2 is closed, there is no voltage acting on the control coil of the bypass monitoring relay KA2 when the UPS bypass is normal, and the normally open contact KA2-1 of the bypass monitoring relay is in the open state. When the UPS fails, the input module (DI2) of the distributed control system (DCS) has no digital input, and the monitoring computer in the control room displays that the UPS is normal. When the UPS itself fails, it automatically switches to bypass power supply mode. At this time, the control coil of the bypass monitoring relay KA2 is energized, and a digital signal is input to the DI2 terminal of the DCS input module. The monitoring computer displays a UPS fault. The control coil of the outgoing line monitoring relay KA3 is connected in series with the third air switch QF3 and then to the UPS output voltage. When the third air switch QF3 is closed, the UPS outgoing line voltage acts on the control coil of the outgoing line monitoring relay KA3, causing the normally closed contact KA3-1 of the outgoing line monitoring relay to open. The input module (DI3) of the DCS input module has no digital input, and the monitoring computer in the control room displays that the outgoing line is normal. When the UPS outgoing line voltage is lost, the control coil of the outgoing line monitoring relay KA3 loses voltage, the normally closed contact KA3-1 of the outgoing line monitoring relay closes, and a digital signal is input to the DI3 terminal of the DCS input module. The monitoring computer displays a UPS outgoing line fault.

[0017] This invention can monitor the operation status of the UPS in real time. Once the incoming power supply fails, it can promptly issue an alarm to prompt operators to handle the situation in a timely manner. This prevents critical loads from losing power after the battery is depleted, which could cause significant losses to safe production. It can meet the stability and safety requirements of factory production.

Claims

1. A UPS fault alarm device, characterized in that, It includes an incoming line monitoring relay (KA1), a distributed control system input module (DCS), and a monitoring computer. The control coil of the incoming line monitoring relay (KA1) is connected to the UPS incoming line voltage. One end of the normally closed contact (KA1-1) of the incoming line monitoring relay is connected to the positive power supply, and the other end is connected to the input terminal of the distributed control system input module (DCS). The monitoring computer is installed in the control room and connected to the distributed control system.

2. The UPS fault alarm device according to claim 1, characterized in that, It also includes a bypass monitoring relay (KA2), the control coil of which is connected to the UPS bypass voltage, one end of the normally open contact (KA2-1) of the bypass monitoring relay is connected to the positive power supply, and the other end is connected to the input terminal of the distributed control system input module (DCS).

3. A UPS fault alarm device according to claim 1 or 2, characterized in that, It also includes an outgoing line monitoring relay (KA3), whose control coil is connected to the UPS output voltage, and one end of the normally closed contact (KA3-1) of the outgoing line monitoring relay is connected to the positive terminal of the power supply, and the other end is connected to the input terminal of the distributed control system input module (DCS).

4. A UPS fault alarm device according to claim 3, characterized in that, It also includes three air switches: the first air switch (QF1) is connected in series with the control coil of the incoming line monitoring relay (KA1); the second air switch (QF2) is connected in series with the control coil of the bypass monitoring relay (KA2); and the third air switch (QF3) is connected in series with the control coil of the outgoing line monitoring relay (KA3).

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