A device and an uninterruptible power supply for preventing short circuits in power supply connections
A technology of power supply connection and power supply connection, which is applied in circuit devices, emergency power supply arrangements, emergency protection circuit devices, etc., can solve problems such as battery damage and explosion, and achieve the effect of avoiding safety accidents.
Active Publication Date: 2019-10-18
HUAWEI DIGITAL POWER TECH CO LTD
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Problems solved by technology
[0006] However, this method needs to disconnect the power supply when a large current signal is detected, but the high current in a short period of time may also cause battery damage or even explosion
Method used
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Embodiment Construction
[0054] The embodiment of the present application provides a device for preventing short-circuiting of power supply connections, which is used to protect the power supply from being damaged or even exploded when two output terminals of the power supply are connected to output short-circuit.
[0055] The working principle of the device provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.
[0056] see figure 1 , which is a schematic diagram of an embodiment of the device for preventing short circuit of the power connection provided by the present application.
[0057] The device for preventing short circuit of power supply connection provided by this embodiment includes: main contactor KM01, auxiliary contactor KM02, current limiting resistor R and delay relay KT;
[0058]The main contactor KM01 is connected between the output terminal of the power supply 100 and the power supply connection point M o...
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The invention discloses equipment for preventing shorted connection of a power supply and an uninterruptible power supply. The equipment comprises a main contactor, an auxiliary contactor, a current-limiting resistor and a delay relay, wherein the main contactor is connected between an output end of the power supply and a power supply connection point of power utilization equipment, the auxiliary contactor is connected in series with the current-limiting resistor and then is connected between the output end of the power supply and the power supply connection point, the power supply connection point is used for supplying power to a coil of the delay relay, a normally-open contact of the delay relay is used for controlling a power supply path of the main contactor. When two arbitrary output ends of the power supply are circuit-shorted, the auxiliary contactor is connected with the current-limiting resistor, a voltage between the two output ends which are circuit-shorted will be applied onto the current-limiting resistor, no voltage exists in an end point corresponding to the power supply connection point, the corresponding delay relay will not act, the power supply path of the main contactor will be conducted when the delay relay does not act, and thus, a safety accident caused by making the power utilization equipment powered on during short circuit of the power supply can be prevented.
Description
technical field [0001] The present application relates to the technical field of uninterruptible power supply, in particular to a device for preventing short circuit of power supply connection and uninterruptible power supply. Background technique [0002] With the advent of the era of big data, the demand for uninterrupted power supply of equipment in the financial and Internet industries is becoming stronger and stronger. Therefore, the status of uninterruptible power supply (UPS, Uninterruptible Power System) in the power supply link is becoming more and more important. The electrical equipment in these industries has higher and higher requirements for the reliability of UPS. [0003] The battery pack connected to the high-power UPS has a large capacity and a high voltage, usually several hundred volts. In the prior art, a circuit breaker or a combination of a circuit breaker and a fuse are generally used for protection of the UPS. [0004] However, in practical applic...
Claims
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IPC IPC(8): H02H11/00H02J9/06
Inventor 王道红黎国标
Owner HUAWEI DIGITAL POWER TECH CO LTD