CN202395439U - Uninterrupted power supply (UPS) over-voltage protection circuit - Google Patents
Uninterrupted power supply (UPS) over-voltage protection circuit Download PDFInfo
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- CN202395439U CN202395439U CN 201220009730 CN201220009730U CN202395439U CN 202395439 U CN202395439 U CN 202395439U CN 201220009730 CN201220009730 CN 201220009730 CN 201220009730 U CN201220009730 U CN 201220009730U CN 202395439 U CN202395439 U CN 202395439U
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- ups
- power supply
- contactor
- uninterrupted power
- splicing ear
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Abstract
Provided is an uninterrupted power supply (UPS) over-voltage protection circuit. A circuit breaker connected with the live line end of a power supply system is connected with a live line connecting terminal of an input port of a UPS through a contactor, wherein the circuit breaker is connected with the contactor in parallel. The zero line end of the power supply system is connected with the live line connecting terminal of the input port of the UPS. An input ground wire connecting terminal of the UPS is connected with an output ground wire connecting terminal of the UPS and grounded. A warning indicator light is connected between a live line connecting terminal of an output port of the UPS and a zero line connecting terminal of the output port of the UPS and is connected with the contactor and a normally-closed contact of the contactor in parallel. A fault indicator light is further connected between the live line connecting terminal of the output port of the UPS and the zero line connecting terminal of the output port of the UPS and is connected with the contactor and the normally-closed contact of the contactor in parallel. The warning indicator light is connected with an over-voltage limiting resistor in series. The fault indicator light is further connected with an over-voltage limiting resistor in series. The UPS over-voltage protection circuit has the advantages that due to the fact that the indicator lights are connected with the over-voltage limiting resistors in series, when the UPS supplies power, the reliable running of the indicator lights are guaranteed, and the work efficiency of the whole UPS power supply system is not affected due to existence of the over-voltage limiting resistors.
Description
Technical field
The utility model relates to a kind of square wave type output UPS power supply indicator light load overvoltage crowbar.
Background technology
UPS (Uninterruptible Power System), promptly uninterrupted power supply is a kind of energy storage device that contains, and is the uninterrupted power supply of the constant voltage constant frequency of chief component with the inverter.Be mainly used in continual supply of electric power to single computer, computer network system or other power electronic equipment is provided.When civil power input just often, UPS is supplied to load to use after with the civil power voltage stabilizing, the UPS of this moment is exactly an electric main pressurizer, it also charges to self-contained battery simultaneously; When civil power interrupted (accident interruption), UPS was immediately with the electric energy of self-contained battery, and the method through the inversion conversion continues supply 220V alternating current to load, made load keep operate as normal and protected that load is soft, hardware is not damaged.UPS equipment all provides protection to voltage is excessive with voltage is too low usually.
Common waveform for some low costs, the output of low power UPS under the powered battery state is a square wave.This UPS is under battery powered situation, and the mode of employing square wave inversion becomes the required alternating current of load with the dc inverter of battery.General come and say that this UPS has the function of the detection of output voltage effective value and feedback stability output voltage effective value.Under the underloading situation, the duty cycle square wave of UPS output is less.Stablize principle of invariance according to effective value, the maximum of square-wave voltage raises.Under the very little situation of duty ratio, it is very high that the square-wave voltage maximum will " be waftd ".This UPS over-voltage breakdown and situation about burning out occur during to some lower-powered loads (like the load of power supply indicator that 3-5W power demand is only arranged, malfunction indicator lamp and so on) power supply easily.When the UPS output loading hour, the maximum of output voltage surpasses the maximum that indicator light can bear, indicator light work does not promptly burn out for a long time, extinguishes.
The utility model content
The utility model technical problem to be solved is to overcome existing above-mentioned shortcoming in the prior art, and a kind of UPS overvoltage crowbar of function admirable is provided.
For addressing the above problem, a kind of UPS overvoltage crowbar is provided, a kind of UPS overvoltage crowbar comprises: through the circuit breaker that links to each other with electric power system live wire end, circuit breaker links to each other with the live wire splicing ear of the input port of uninterrupted power supply UPS through contactor; Wherein circuit breaker and contactor are in parallel; The zero line side of electric power system links to each other with the zero line splicing ear of the input port of uninterrupted power supply UPS; The input ground wire splicing ear of uninterrupted power supply UPS links to each other and ground connection with the output ground wire splicing ear of uninterrupted power supply UPS; Be connected with alarm indicator between the zero line splicing ear of the live wire splicing ear of the output port of uninterrupted power supply UPS and the output port of uninterrupted power supply UPS, alarm indicator is parallel with the normally-closed contact of contactor and contactor; Also be connected with malfunction indicator lamp between the zero line splicing ear of the live wire splicing ear of the output port of uninterrupted power supply UPS and the output port of uninterrupted power supply UPS, malfunction indicator lamp is parallel with the normally-closed contact of contactor and contactor; It is characterized in that described alarm indicator is serially connected with the overvoltage limiting resistance; String has the overvoltage limiting resistance on the described malfunction indicator lamp.
Described alarm indicator is serially connected with the parallelly connected again overvoltage limiting resistance of overvoltage limiting resistance, and string has overvoltage limiting resistance parallel connection couplet overvoltage limiting resistance again on the described malfunction indicator lamp.
The resistance of described overvoltage limiting resistance is 5 kilohms.
The advantage of the utility model: because indicator light is serially connected with the overvoltage limiting resistance, when uninterrupted power supply UPS supplied power, the reliability service of indicator light was guaranteed, and whole UPS electric power system can not influence its operating efficiency because of the existence of overvoltage limiting resistance.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
In conjunction with accompanying drawing the utility model is done further detailed explanation.
Like Fig. 1, a kind of UPS overvoltage crowbar comprises: through the circuit breaker Q 2 that links to each other with electric power system live wire end L, circuit breaker Q 2 links to each other with the live wire XL splicing ear of the input port of uninterrupted power supply UPS through contactor K3; Circuit breaker Q 3 is in parallel with contactor K3; The zero line side N of electric power system links to each other with the zero line XN splicing ear of the input port of uninterrupted power supply UPS; The input ground wire PE splicing ear of uninterrupted power supply UPS links to each other and ground connection with the output ground wire PE splicing ear of uninterrupted power supply UPS; Be connected with alarm indicator RD between the zero line XN splicing ear of the live wire XL splicing ear of the output port of uninterrupted power supply UPS and the output port of uninterrupted power supply UPS, alarm indicator RD is parallel with the normally-closed contact of contactor K1 and contactor K1; Also be connected with malfunction indicator lamp YE between the zero line XN splicing ear of the live wire XL splicing ear of the output port of uninterrupted power supply UPS and the output port of uninterrupted power supply UPS, malfunction indicator lamp YE is parallel with the normally-closed contact of contactor K2 and contactor K2; Innovative point of the present invention is: alarm indicator YE is serially connected with overvoltage limiting resistance R1; Malfunction indicator lamp YE goes up string has overvoltage limiting resistance R3; For it is more effectively worked, overvoltage limiting resistance R1 parallel connection overvoltage limiting resistance R2; Overvoltage limiting resistance R3 goes up parallelly connected overvoltage limiting resistance R4; The resistance of overvoltage limiting resistance R1, R2, R3, R4 is 5 kilohms.
Operation principle: uninterrupted UPS is under powered battery; UPS square wave inverter output voltage; Load this moment is lighter, and the voltage magnitude of square wave inversion output is higher, and this moment, indicator light was through the overvoltage limiting resistance before the series connection; The peak value of supply power voltage is cut low, the power supply maximum of indicator light is no more than the upper limit of indicator light power reguirements.Simultaneously, the resistance of this overvoltage limiting resistance is also unsuitable excessive, also need guarantee under other mode of operations of uninterrupted power supply UPS; Under the operating mode like bypass or online inversion, under the lower limit situation of uninterrupted power supply UPS output voltage amplitude, the series connection of overvoltage limiting resistance; Though can reduce the indicator light supply power voltage of certain amplitude, within the normal range (NR) of indicator light power supply, the supply power voltage of indicator light can satisfy the demand of indicator light power supply; Can be because of electricity shortage luminous deficiency, the light is dusky.In addition, in fact this overvoltage limiting resistance has consumed a part of energy (perhaps electrical power) that may cause damage to indicator light, but UPS battery power supply requirement and the overall efficiency requirement of basic time are satisfied in the power consumption (power consumption) here.
Claims (3)
1. UPS overvoltage crowbar comprises: through the circuit breaker (Q2) that links to each other with electric power system live wire end (L), circuit breaker (Q2) links to each other with live wire (XL) splicing ear of the input port of uninterrupted power supply UPS through contactor (K3); Wherein circuit breaker (Q3) is in parallel with contactor (K3); The zero line side of electric power system (N) links to each other with zero line (XN) splicing ear of the input port of uninterrupted power supply UPS; Input ground wire (PE) splicing ear of uninterrupted power supply UPS links to each other and ground connection with output ground wire (PE) splicing ear of uninterrupted power supply UPS; Be connected with alarm indicator (RD) between zero line (XN) splicing ear of the output port of the live wire of the output port of uninterrupted power supply UPS (XL) splicing ear and uninterrupted power supply UPS, alarm indicator (RD) is parallel with the normally-closed contact of contactor (K1) and contactor (K1); Also be connected with malfunction indicator lamp (YE) between zero line (XN) splicing ear of the output port of the live wire of the output port of uninterrupted power supply UPS (XL) splicing ear and uninterrupted power supply UPS, malfunction indicator lamp (YE) is parallel with the normally-closed contact of contactor (K2) and contactor (K2); It is characterized in that described alarm indicator (YE) is serially connected with overvoltage limiting resistance (R1); Described malfunction indicator lamp (YE) goes up string has overvoltage limiting resistance (R3).
2. a kind of UPS overvoltage crowbar according to claim 1 is characterized in that the parallelly connected overvoltage limiting resistance of described overvoltage limiting resistance (R1) (R2); Described overvoltage limiting resistance (R3) is gone up parallelly connected overvoltage limiting resistance (R4).
3. a kind of UPS overvoltage crowbar according to claim 1 and 2 is characterized in that the resistance of described overvoltage limiting resistance (R1, R2, R3, R4) is 5 kilohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220009730 CN202395439U (en) | 2012-01-11 | 2012-01-11 | Uninterrupted power supply (UPS) over-voltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220009730 CN202395439U (en) | 2012-01-11 | 2012-01-11 | Uninterrupted power supply (UPS) over-voltage protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202395439U true CN202395439U (en) | 2012-08-22 |
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ID=46670341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220009730 Expired - Fee Related CN202395439U (en) | 2012-01-11 | 2012-01-11 | Uninterrupted power supply (UPS) over-voltage protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202395439U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001530A (en) * | 2012-10-31 | 2013-03-27 | 联正电子(深圳)有限公司 | Method and device for controlling square-wave UPS (uninterrupted power supply) output voltage in battery mode |
| EP4020732A1 (en) * | 2020-12-18 | 2022-06-29 | Schneider Electric IT Corporation | Instantaneous line swell protection for ups |
-
2012
- 2012-01-11 CN CN 201220009730 patent/CN202395439U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001530A (en) * | 2012-10-31 | 2013-03-27 | 联正电子(深圳)有限公司 | Method and device for controlling square-wave UPS (uninterrupted power supply) output voltage in battery mode |
| CN103001530B (en) * | 2012-10-31 | 2014-09-17 | 联正电子(深圳)有限公司 | Method and device for controlling square-wave UPS (uninterrupted power supply) output voltage in battery mode |
| EP4020732A1 (en) * | 2020-12-18 | 2022-06-29 | Schneider Electric IT Corporation | Instantaneous line swell protection for ups |
| US11824466B2 (en) | 2020-12-18 | 2023-11-21 | Schneider Electric It Corporation | Instantaneous line swell protection for UPS |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20180111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |