CN108649688B - External bypass switching device of UPS - Google Patents
External bypass switching device of UPS Download PDFInfo
- Publication number
- CN108649688B CN108649688B CN201810621823.4A CN201810621823A CN108649688B CN 108649688 B CN108649688 B CN 108649688B CN 201810621823 A CN201810621823 A CN 201810621823A CN 108649688 B CN108649688 B CN 108649688B
- Authority
- CN
- China
- Prior art keywords
- normally
- relay
- ups
- silicon
- rectifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention belongs to the technical field of electricity, and discloses an external bypass switching device of a UPS. The device comprises a main switching loop and a detection control loop, wherein the main switching loop comprises a mains supply branch circuit and a UPS power supply branch circuit; the detection control loop comprises a mains supply silicon controlled rectifier group arranged on a mains supply branch and a UPS silicon controlled rectifier group arranged on a UPS power supply branch, wherein the two silicon controlled rectifier groups are connected with an optocoupler relay group circuit, and the optocoupler relay group circuit comprises a rectifying circuit connected with the two silicon controlled rectifier groups, and a first optocoupler relay and a second optocoupler relay connected with the rectifying circuit. The commercial power thyristor group and the UPS thyristor group are controlled by adopting the passive switch, so that when a control circuit of the device fails and a control power supply is lost, the normal output power supply of the device can be ensured, and the reliability of the static change-over switch device is improved to the greatest extent.
Description
Technical Field
The invention relates to the technical field of electricity, in particular to an external bypass switching device of a UPS.
Background
As is known, along with the improvement of automation and informatization degree, the safety and reliability of the UPS power supply are more and more important, but accidents of the interruption of the UPS output power supply are frequent due to bypass switching faults inside the UPS; in addition, because the bypass switch is arranged in the UPS, the UPS cannot be completely withdrawn for maintenance, meanwhile, when the production is not interrupted, the UPS is manually operated to convert the inversion state into the bypass state, the risk of outage caused by switching failure exists, and the prior art cannot solve the problems.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the internal bypass of a UPS is switched to fail, the UPS cannot be completely withdrawn for maintenance, and the switching failure is caused by manual operation of the UPS, so that the power failure risk is brought.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the UPS external bypass switching device comprises a main switching loop and a detection control loop, wherein the main switching loop comprises a mains supply branch and a UPS supply branch; the detection control loop comprises a mains supply controlled silicon group arranged on a mains supply power supply branch and a UPS controlled silicon group arranged on a UPS power supply branch, the detection control loop further comprises an optocoupler relay group circuit, the mains supply controlled silicon group and the UPS controlled silicon group are connected with the optocoupler relay group circuit, and the optocoupler relay group circuit comprises a rectifying circuit connected with the mains supply controlled silicon group and the UPS controlled silicon group and an optocoupler relay group connected with the rectifying circuit.
Further, the optocoupler relay group comprises a first optocoupler relay and a second optocoupler relay which are connected with each other, the mains supply silicon controlled rectifier group comprises a first silicon controlled rectifier and a second silicon controlled rectifier which are connected in parallel in an inverse mode, the cathode of the first silicon controlled rectifier is connected with the anode of the second silicon controlled rectifier and then connected with a second circuit breaker, the first circuit breaker is connected with a mains supply phase line, and the anode of the first silicon controlled rectifier is connected with the cathode of the second silicon controlled rectifier and then connected with a load terminal.
Further, the anode of the first silicon controlled rectifier is connected with the cathode of the second silicon controlled rectifier and then connected with the normally open main contact and the current limiting resistor of the contactor in parallel, and the current limiting resistor and the normally open main contact of the contactor are connected with the load terminal; and a third fuse is further connected between the current limiting resistor and the cathode of the second silicon controlled rectifier, the third fuse is connected with a normally closed contact of the first button, the normally closed contact of the first button is connected with a normally open contact of the micro relay, the normally open contact of the micro relay is connected with a contactor, the other end of the contactor is connected with a zero line, and the optocoupler relay group circuit is provided with the micro relay for controlling the on-off of the normally open contact of the micro relay.
Further, the UPS controlled silicon group comprises a third controlled silicon and a fourth controlled silicon which are connected in parallel in an inverse mode, the cathode of the third controlled silicon and the anode of the fourth controlled silicon are connected and then connected with a normally-closed main contact of the contactor, the normally-closed main contact of the contactor is connected with a first circuit breaker, and the first circuit breaker (QF 1) is connected with a UPS phase line.
Further, the rectifying circuit comprises a first bridge rectifying circuit and a second bridge rectifying circuit, the first bridge rectifying circuit comprises a first fuse connected with the cathode of the first silicon controlled rectifier, the first fuse is connected with a first resistor, the first resistor is connected with one alternating current input end of the first bridge rectifier, the other alternating current input end of the bridge rectifier is connected with a zero line, and the direct current input end and the direct current output end of the bridge rectifier are connected with a first optocoupler relay.
Further, an output + terminal of the bridge rectifier is connected with one end of a normally closed point NC of the first optocoupler relay, one end of the normally closed point NC of the first optocoupler relay is also connected with one end of a second button, the other end of the second button is connected with the other end of the normally closed point NC of the first optocoupler relay and the micro relay, and the micro relay is connected with a direct current output-terminal of the bridge rectifier.
Further, the second bridge rectifier circuit comprises a second fuse connected with the cathode of the third silicon controlled rectifier, the second fuse is connected with a second resistor, the second resistor is connected with one alternating current input end of the second bridge rectifier, the other alternating current input end of the second bridge rectifier is connected with a zero line, the direct current output plus terminal of the second bridge rectifier is connected with the normally open contact NO of the first optocoupler relay, and the direct current output-terminal of the second bridge rectifier is connected with the cathode of the normally closed point NC light emitting diode of the second optocoupler relay.
Further, the direct current output+terminal of the second bridge rectifier is further connected with a first button normally-open contact, the first button normally-open contact is connected with a contactor normally-closed auxiliary contact, the contactor normally-closed auxiliary contact is connected with one end of a third resistor, one end of a first opto-coupler relay normally-open point NO is connected between the contactor normally-closed auxiliary contact and one end of the third resistor, the other end of the third resistor is connected with an anode of the first opto-coupler relay normally-open point NO light-emitting diode, a cathode of the first opto-coupler relay normally-open point NO light-emitting diode is connected with an anode of the first opto-coupler relay normally-closed point NC light-emitting diode, a cathode of the second opto-coupler relay normally-closed point NO light-emitting diode is connected with an anode of the second opto-coupler relay normally-closed point NC light-emitting diode, one end of the capacitor is further connected with a direct current output-terminal of the second bridge rectifier, and the other end of the capacitor is connected between the contactor normally-closed auxiliary contact and the third resistor.
Further, a second voltage stabilizing diode is connected to a line between the direct current output + terminal of the bridge rectifier and the direct current output-terminal of the bridge rectifier, the cathode of the second voltage stabilizing diode is connected with the direct current output + terminal of the bridge rectifier and one end of the normally closed point NC of the first optocoupler relay, and the anode of the second voltage stabilizing diode is connected with the direct current output-terminal of the bridge rectifier and the micro relay.
Further, a line between the normally closed auxiliary contact of the contactor and one end of the capacitor is connected with a cathode of the first zener diode, and an anode of the first zener diode is connected with a direct current output-terminal of the second bridge rectifier and the other end of the capacitor.
Compared with the prior art, the invention has the following beneficial effects: the invention relates to a commercial power silicon controlled rectifier group on a commercial power supply branch and a UPS silicon controlled rectifier group arranged on a UPS power supply branch, wherein the silicon controlled rectifier group is controlled by an optocoupler relay group through detection and logic of the optocoupler relay group, so that when one group of silicon controlled rectifiers is conducted, the other group of silicon controlled rectifiers is in a cut-off state.
The fast switching between the two paths of power supplies is realized. After the UPS fails and is powered off, the device automatically and quickly switches to an external bypass mains supply to supply power, so that the reliability of the power supply is ensured; meanwhile, the device can be manually and rapidly switched to the external bypass mains supply to supply power, so that the periodic safe offline maintenance and online recovery of the UPS are realized.
The commercial power thyristor group and the UPS thyristor group are controlled by adopting the passive switch, so that when a control circuit of the device fails and a control power supply is lost, the normal output power supply of the device can be ensured, and the reliability of the static change-over switch device is improved to the greatest extent.
The invention adopts the passive control of the optocoupler relay group and the silicon controlled rectifier group, so that the switching control of two paths of power supplies is relatively simple and easy to realize, the action on time of the optocoupler relay group and the silicon controlled rectifier group is within 1ms, the switching speed of the two paths of power supplies is extremely high, in order to ensure the reliability of the action, the device adds a proper capacitor C to a detection loop to carry out power failure discharge delay, and through the observation and verification of a waveform recorder, the device can realize the Uninterrupted Power Supply (UPS) accident to the recovery of bypass mains supply not exceeding 5ms and completely meet the field use requirement.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
FIG. 2 is a voltage waveform diagram of the analog UPS power supply of the present invention when the output fault is powered down.
Fig. 3 is a waveform diagram of the load side voltage when the mains power supply of the present invention is manually switched to the UPS power supply.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1, an external bypass switching device of a UPS includes a main switching circuit and a detection control circuit, where the main switching circuit includes a mains supply branch and a UPS supply branch; the detection control loop comprises a mains supply controlled silicon group arranged on a mains supply power supply branch and a UPS controlled silicon group arranged on a UPS power supply branch, the detection control loop further comprises an optocoupler relay group circuit, the mains supply controlled silicon group and the UPS controlled silicon group are connected with the optocoupler relay group circuit, and the optocoupler relay group circuit comprises a rectifying circuit connected with the mains supply controlled silicon group and the UPS controlled silicon group and an optocoupler relay group connected with the rectifying circuit. The optocoupler relay group comprises a first optocoupler relay GE1 and a second optocoupler relay GE2 which are connected with each other, the commercial power silicon controlled rectifier group comprises a first silicon controlled rectifier SCR1 and a second silicon controlled rectifier SCR2 which are connected in parallel in an inverse mode, the cathode of the first silicon controlled rectifier SCR1 is connected with the cathode of the second silicon controlled rectifier SCR2 through (1) points and (2), the cathode of the first silicon controlled rectifier SCR1 is connected with the anode of the second silicon controlled rectifier SCR2 and then connected with a second breaker QF2, the first breaker QF1 is connected with a commercial power phase line L2, and the anode of the first silicon controlled rectifier SCR1 is connected with a load terminal L after being connected with the cathode of the second silicon controlled rectifier SCR 2. The anode of the first silicon controlled rectifier SCR1 is connected with the cathode of the second silicon controlled rectifier SCR2 and then connected with the normally open main contact KM1 and the current limiting resistor R of the contactor in parallel, and the current limiting resistor R and the normally open main contact KM1 of the contactor are connected with the load terminal L; the current limiting resistor R is also connected with a third fuse FU3 between the cathode of the second silicon controlled rectifier SCR2, the third fuse FU3 is connected with a first button normally-closed contact SB1 ', the first button normally-closed contact SB1 ' is connected with a micro-relay normally-open contact K, the micro-relay normally-open contact K is connected with a contactor KM, the other end of the contactor KM is connected with a zero line N, and the micro-relay K for controlling the on-off of the micro-relay normally-open contact K ' is arranged on an optocoupler relay group circuit.
The UPS controlled silicon group comprises a third controlled silicon SCR3 and a fourth controlled silicon SCR4 which are connected in reverse parallel, wherein the cathodes of the third controlled silicon SCR3 and the cathodes of the fourth controlled silicon SCR4 are connected through (3) points and (4), the cathodes of the third controlled silicon SCR3 and the anodes of the fourth controlled silicon SCR4 are connected and then connected with a normally closed main contact KM2 of the contactor, the normally closed main contact KM2 of the contactor is connected with a first breaker QF1, and the first breaker QF1 is connected with a UPS phase line L1.
The rectification circuit comprises a first bridge rectification circuit and a second bridge rectification circuit, wherein the first bridge rectification circuit comprises a first fuse FU1 connected with the cathode of a first silicon controlled rectifier SCR1, the first fuse FU1 is connected with a first resistor R1, the first resistor R1 is connected with one alternating current input end of a first bridge rectifier VC1, the other alternating current input end of the first bridge rectifier VC1 is connected with a zero line N, and the direct current input end and the direct current output end of the first bridge rectifier VC1 are connected with a first optocoupler relay GE 1. The output + terminal of the first bridge rectifier VC1 is connected with one end of a normally closed point NC of the first opto-coupler relay GE1, one end of the normally closed point NC of the first opto-coupler relay GE1 is also connected with one end of a second button SB2, the other end of the second button SB2 is connected with the other end of the normally closed point NC of the first opto-coupler relay GE1 and the micro relay K, and the micro relay K is connected with a direct current output-terminal of the first bridge rectifier VC 1.
A second zener diode DW2 is connected to a line between the dc output + terminal of the first bridge rectifier VC1 and the dc output-terminal of the first bridge rectifier VC1, a cathode of the second zener diode DW2 is connected to the dc output + terminal of the first bridge rectifier VC1 and one end of the normally closed point NC of the first optocoupler relay GE1, and an anode of the second zener diode DW2 is connected to the dc output-terminal of the first bridge rectifier VC1 and the micro relay K.
The second bridge rectifier circuit comprises a second fuse FU2 connected with the cathode of the third silicon controlled rectifier SCR3, the second fuse FU2 is connected with a second resistor R2, the second resistor R2 is connected with one alternating current input end of the second bridge rectifier VC2, the other alternating current input end of the second bridge rectifier VC2 is connected with a zero line N, a direct current output + terminal of the second bridge rectifier VC2 is connected with a normally open contact NO of the first optocoupler relay GE1, and a direct current output-terminal of the second bridge rectifier VC2 is connected with the cathode of a normally closed point NC light emitting diode of the second optocoupler relay GE 2.
The direct current output + terminal of the second bridge rectifier VC2 is also connected with a first button normally-open contact SB1, the first button normally-open contact SB1 is connected with a contactor normally-closed auxiliary contact KM3, the contactor normally-closed auxiliary contact KM3 is connected with one end of a third resistor R3, one end of a first opto-coupler relay GE1 normally-open point NO is connected between the contactor normally-closed auxiliary contact KM3 and one end of the third resistor R3, the other end of the third resistor R3 is connected with the anode of the first opto-coupler relay GE1 normally-open point NO light-emitting diode, the cathode of the first opto-coupler relay GE1 normally-open point NO light-emitting diode is connected with the anode of the first opto-coupler relay GE1 normally-closed point NC light-emitting diode, the cathode of the first opto-coupler relay GE1 normally-closed point NC light-emitting diode is connected with the anode of the second opto-coupler relay GE2 normally-open point NC light-emitting diode, the cathode of the second opto-coupler relay GE2 normally-open point NC light-emitting diode is connected with the anode of the second opto-coupler relay GE2 normally-open point NC light-emitting diode, and the other end of the capacitor C is connected with the output capacitor C3 of the second opto-coupler capacitor R3.
The circuit between the normally closed auxiliary contact KM3 of the contactor and one end of the capacitor C is connected with the cathode of the first zener diode DW1, and the anode of the first zener diode DW1 is connected with the direct current output-terminal of the second bridge rectifier VC2 and the other end of the capacitor C.
When the UPS is interrupted, in the control loop, the direct current power supplied by the second fuse FU2, the second resistor R2 and the second bridge rectifier VC2 disappears, the light emitting diode of the first optocoupler relay GE1 and the second optocoupler relay GE2 is powered off, the normally open point ' NO ' of the second optocoupler relay GE2 is changed from closed to open, namely the (1) (2) point between the third silicon controlled SCR3 and the fourth silicon controlled SCR4 is disconnected, the third silicon controlled SCR3 and the fourth silicon controlled SCR4 are cut off when the current crosses zero, meanwhile, the normally closed point ' NC ' of the second optocoupler relay (GE 2) is connected, the first silicon controlled SCR1 and the second silicon controlled SCR2 are connected at the moment, the first silicon controlled SCR1 and the second silicon controlled SCR2 are connected through the second circuit breaker QF2, the reverse parallel silicon controlled SCR1 and the second silicon controlled SCR2, the current limiting resistor R1 is connected through the normally closed point of the second optocoupler relay, and the normally closed point ' NC 1 is connected through the normally closed point of the first optocoupler relay, and the normally closed point of the first silicon controlled SCR1 is connected through the normally closed point of the first optocoupler relay SCR1, and the normally open coil of the first silicon controlled SCR1 is connected through the normally open point of the normally closed bridge rectifier, and the normally closed point of the normally open contact of the first silicon controlled SCR1 is connected with the normally closed through the normally closed point of the normally closed contact of the first bridge rectifier.
When the power supply of the mains supply is required to be restored to the power supply of the UPS, the first button SB1 'can be pressed down, the normally closed contact SB 1' of the first button is disconnected, the coil of the contactor KM is in power failure, the normally open main contact KM1 of the contactor is disconnected, the normally closed auxiliary contact KM3 of the mains supply is closed at the same time, the UPS is restored to the normal direct current power supply output through the second fuse FU2, the second resistor R2 and the second bridge rectifier VC2, and the normally closed auxiliary contact KM3 of the contactor, the third resistor R3 and 4 light emitting diodes of the first opto-coupler relay GE1 and the second opto-coupler relay GE2 form a loop, so that the first opto-coupler relay GE1 and the second opto-coupler relay GE2 act, and the normally open point 'NO' of the first opto-coupler relay GE1 is closed, thereby completing the self-locking of the light emitting diode power supply loops of the first opto-coupler relay GE1 and the second opto-coupler relay GE 2.
In addition, the second optocoupler relay GE2 is powered on, the normally open contact "NO" of the second optocoupler relay GE2 is closed, the gate (1) and the gate (2) between the third silicon controlled rectifier SCR3 and the fourth silicon controlled rectifier SCR4 are turned on, the normally closed contact "NC" of the second optocoupler relay GE2 is disconnected, the first silicon controlled rectifier SCR1 and the second silicon controlled rectifier SCR2 of the mains supply loop are cut off when the current crosses zero, and manual switching from the mains supply to the UPS power supply is realized.
When the UPS is required to be manually switched to the mains supply for the maintenance of the UPS completely in an off-line mode, the second button SB2 can be pressed, the micro relay K coil is powered on through the normally open contact of the button SB2, the normally open contact K ' of the micro relay is closed, the contactor coil KM is powered on through the third fuse FU3, the normally closed point of the first button SB1 ' and the normally open contact K ' of the micro relay, and the normally closed main contact KM2 of the contactor is disconnected, so that the UPS is cut off, and the action process of the control loop is the same as the logic sequence when the power supply is interrupted at the moment, so that the power supply at the load side is quickly switched to the mains supply.
The pins (1) and (2) of the second optocoupler relay GE2 are connected according to a wire number to control the gate electrodes between the third silicon controlled rectifier SCR3 and the fourth silicon controlled rectifier SCR 4;
and pins (3) and (4) of the first optocoupler relay GE1 are connected according to a wire number to control a gate electrode between the first silicon controlled rectifier SCR1 and the second silicon controlled rectifier SCR 2.
Fig. 2 and 3 show waveforms of voltage fluctuation (instantaneous power loss) recorded by a waveform recorder when the device is switched between power supplies. Fig. 2 shows a measured voltage waveform when the analog UPS power source fails to power off, where the "a" channel waveform is the voltage waveform on the load side, the power off recovery time at switching can be measured to be 4.6ms, and the "B" channel waveform is the voltage waveform measured at FU2 point. Fig. 3 shows that when the mains supply is manually switched to the UPS by pressing the button SB2, the voltage on the load side fluctuates, the waveform of the "a" channel is the voltage waveform measured by the load, no voltage fluctuation is seen, the waveform of the "B" channel is the voltage fluctuation when the contactor coil is powered off, and the voltage fluctuation on the load side of fig. 2 and 3 recorded by the waveform recorder can indicate that the switching time of the device is less than the requirement of the national standard for the switching time of the class III UPS by less than 8ms, and if the switching time needs to be further shortened, the detection action time can be shortened by adjusting the capacity of the capacitor C in the detection control loop.
Claims (1)
1. An external bypass switching device of UPS, characterized by: the system comprises a main switching loop and a detection control loop, wherein the main switching loop comprises a mains supply branch and a UPS power supply branch; the detection control loop comprises a mains supply controlled silicon group arranged on a mains supply power supply branch and a UPS controlled silicon group arranged on a UPS power supply branch, the detection control loop also comprises an optocoupler relay group circuit, the mains supply controlled silicon group and the UPS controlled silicon group are connected with the optocoupler relay group circuit, and the optocoupler relay group circuit comprises a rectifying circuit connected with the mains supply controlled silicon group and the UPS controlled silicon group and an optocoupler relay group connected with the rectifying circuit;
the optocoupler relay group comprises a first optocoupler relay (GE 1) and a second optocoupler relay (GE 2) which are connected with each other, the commercial power silicon controlled rectifier group comprises a first silicon controlled rectifier (SCR 1) and a second silicon controlled rectifier (SCR 2) which are connected in reverse parallel, the cathode of the first silicon controlled rectifier (SCR 1) is connected with the anode of the second silicon controlled rectifier (SCR 2) and then is connected with a second circuit breaker (QF 2), the first circuit breaker (QF 1) is connected with a commercial power phase line (L2), and the anode of the first silicon controlled rectifier (SCR 1) is connected with a load terminal (L) after being connected with the cathode of the second silicon controlled rectifier (SCR 2);
the anode of the first silicon controlled rectifier (SCR 1) is connected with the cathode of the second silicon controlled rectifier (SCR 2) and then connected with a normally open main contact (KM 1) and a current limiting resistor (R) of the contactor in parallel, and the current limiting resistor (R) and the normally open main contact (KM 1) of the contactor are connected with a load terminal (L); a third fuse (FU 3) is further connected between the current limiting resistor (R) and the cathode of the second silicon controlled rectifier (SCR 2), the third fuse (FU 3) is connected with a first button normally-closed contact (SB 1 '), the first button normally-closed contact (SB 1 ') is connected with a micro relay normally-open contact (K), the micro relay normally-open contact (K) is connected with a contactor (KM), the other end of the contactor (KM) is connected with a zero line (N), and a micro relay (K) for controlling the on-off of the micro relay normally-open contact (K ') is arranged on the optocoupler relay group circuit;
the UPS controlled silicon group comprises a third controlled silicon (SCR 3) and a fourth controlled silicon (SCR 4) which are connected in parallel in an inverse way, wherein the cathode of the third controlled silicon (SCR 3) and the anode of the fourth controlled silicon (SCR 4) are connected and then connected with a normally closed main contact (KM 2) of the contactor, the normally closed main contact (KM 2) of the contactor is connected with a first circuit breaker (QF 1), and the first circuit breaker (QF 1) is connected with a UPS phase line (L1);
the rectifying circuit comprises a first bridge rectifying circuit and a second bridge rectifying circuit, wherein the first bridge rectifying circuit comprises a first fuse (FU 1) connected with the cathode of a first silicon controlled rectifier (SCR 1), the first fuse (FU 1) is connected with a first resistor (R1), the first resistor (R1) is connected with one alternating current input end of a first bridge rectifier (VC 1), the other alternating current input end of the first bridge rectifier (VC 1) is connected with a zero line (N), and the direct current input end and the direct current output end of the first bridge rectifier (VC 1) are connected with a first optocoupler relay (GE 1);
the output + terminal of the first bridge rectifier (VC 1) is connected with one end of a normally closed point NC of the first optocoupler relay (GE 1), one end of the normally closed point NC of the first optocoupler relay (GE 1) is also connected with one end of a second button (SB 2), the other end of the second button (SB 2) is connected with the other end of the normally closed point NC of the first optocoupler relay (GE 1) and a micro relay (K), and the micro relay (K) is connected with a direct current output-terminal of the first bridge rectifier (VC 1);
the second bridge rectifier circuit comprises a second fuse (FU 2) connected with the cathode of the third silicon controlled rectifier (SCR 3), the second fuse (FU 2) is connected with a second resistor (R2), the second resistor (R2) is connected with one alternating current input end of the second bridge rectifier (VC 2), the other alternating current input end of the second bridge rectifier (VC 2) is connected with a zero line (N), the direct current output plus terminal of the second bridge rectifier (VC 2) is connected with a normally open contact NO of the first optocoupler relay (GE 1), and the direct current output-terminal of the second bridge rectifier (VC 2) is connected with the cathode of the NC light emitting diode at the normally closed point of the second optocoupler relay (GE 2);
the direct current output + terminal of the second bridge rectifier (VC 2) is also connected with a first button normally-open contact (SB 1), the first button normally-open contact (SB 1) is connected with a contactor normally-closed auxiliary contact (KM 3), the contactor normally-closed auxiliary contact (KM 3) is connected with one end of a third resistor (R3), one end of a first opto-coupler relay (GE 1) normally-open point NO is connected between one end of the contactor normally-closed auxiliary contact (KM 3) and one end of the third resistor (R3), the other end of the third resistor (R3) is connected with the anode of the first opto-coupler relay (GE 1) normally-open point NO light emitting diode, the cathode of the first opto-coupler relay (GE 1) normally-closed point NC light emitting diode is connected with the anode of the first opto-coupler relay (GE 1) normally-closed point NC light emitting diode, the cathode of the second opto-coupler relay (GE 2) normally-open point NO light emitting diode is connected with the anode of the second opto-coupler relay (GE 2), and the other end of the second opto-coupler relay (GE 2) normally-closed point normally-open point NO light emitting diode is connected with the cathode of the second opto-coupler relay (GE 2), and the other end of the second bridge rectifier capacitor (NC 2) normally-closed point normally-open point NO light emitting diode is connected with the anode of the second opto-resistor (GE 2);
a second voltage stabilizing diode (DW 2) is connected to a circuit between the direct current output + terminal of the first bridge rectifier (VC 1) and the direct current output-terminal of the first bridge rectifier (VC 1), the cathode of the second voltage stabilizing diode (DW 2) is connected with the direct current output + terminal of the first bridge rectifier (VC 1) and one end of a normally closed point NC of the first optocoupler relay (GE 1), and the anode of the second voltage stabilizing diode (DW 2) is connected with the direct current output-terminal of the first bridge rectifier (VC 1) and the micro relay (K);
the circuit between the normally closed auxiliary contact (KM 3) of the contactor and one end of the capacitor (C) is connected with the cathode of the first voltage stabilizing diode (DW 1), and the anode of the first voltage stabilizing diode (DW 1) is connected with the direct current output-terminal of the second bridge rectifier (VC 2) and the other end of the capacitor (C).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810621823.4A CN108649688B (en) | 2018-06-15 | 2018-06-15 | External bypass switching device of UPS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810621823.4A CN108649688B (en) | 2018-06-15 | 2018-06-15 | External bypass switching device of UPS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108649688A CN108649688A (en) | 2018-10-12 |
| CN108649688B true CN108649688B (en) | 2023-08-04 |
Family
ID=63752912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810621823.4A Active CN108649688B (en) | 2018-06-15 | 2018-06-15 | External bypass switching device of UPS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108649688B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102276024B1 (en) | 2019-10-30 | 2021-07-12 | 엘에스일렉트릭(주) | A sts(static transfer switch) and an ups(uninterruptible power supply) module with the sts |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222145A (en) * | 2007-01-11 | 2008-07-16 | 宝山钢铁股份有限公司 | Device and method for on-line switching uninterrupted power supply |
| CN201656549U (en) * | 2010-03-17 | 2010-11-24 | 邯钢集团邯宝钢铁有限公司 | Automatic switching device of UPS |
| CN202840669U (en) * | 2012-09-11 | 2013-03-27 | 深圳市华诚电力设备有限公司 | Commercial power-generated power dual-power-supply automatic/hand-operated transition power supply circuit |
| CN203984085U (en) * | 2014-07-28 | 2014-12-03 | 国家电网公司 | Uninterrupted power supply control device |
| CN204761145U (en) * | 2015-06-30 | 2015-11-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A controlling means for reserve return circuit of UPS automatic switch -over |
-
2018
- 2018-06-15 CN CN201810621823.4A patent/CN108649688B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222145A (en) * | 2007-01-11 | 2008-07-16 | 宝山钢铁股份有限公司 | Device and method for on-line switching uninterrupted power supply |
| CN201656549U (en) * | 2010-03-17 | 2010-11-24 | 邯钢集团邯宝钢铁有限公司 | Automatic switching device of UPS |
| CN202840669U (en) * | 2012-09-11 | 2013-03-27 | 深圳市华诚电力设备有限公司 | Commercial power-generated power dual-power-supply automatic/hand-operated transition power supply circuit |
| CN203984085U (en) * | 2014-07-28 | 2014-12-03 | 国家电网公司 | Uninterrupted power supply control device |
| CN204761145U (en) * | 2015-06-30 | 2015-11-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A controlling means for reserve return circuit of UPS automatic switch -over |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108649688A (en) | 2018-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104868586B (en) | Automatic switching power supply circuit for double-way power supply | |
| CN105470930B (en) | A kind of radar intelligent distribution system | |
| CN210350854U (en) | Seamless automatic switching loop for UPS power supply | |
| CN102946106B (en) | Silicon controlled rectifier combination switch | |
| CN108649688B (en) | External bypass switching device of UPS | |
| CN208971236U (en) | A kind of transformer Cooling control cabinet main power supply automatic switching loop | |
| CN202949231U (en) | Intelligent zero-crossing switching silicon controlled combination switch | |
| CN202291764U (en) | Electric welding machine protective device | |
| CN102412577B (en) | Non-breakpoint operation type power-saving device | |
| CN201490758U (en) | Low-pressure dual-power supply automatic switching control device | |
| CN203632205U (en) | Anti-fluctuation module operating in bypass mode | |
| CN102957157B (en) | Silicon controlled composite switch of intelligent zero-crossing switching | |
| CN103023044B (en) | Combination switch with intelligent zero-crossing switching function | |
| CN208835830U (en) | A kind of external bypass changeover device of UPS | |
| CN102683111A (en) | Intelligent composite AC contactor | |
| CN101887822A (en) | Relay small-voltage control device and method | |
| CN203691293U (en) | Mining explosion-proof and intrinsically-safe dual-contactor low-voltage AC soft starter | |
| CN203562833U (en) | Automatic dual-power-supply switching device for air blowers | |
| CN209853537U (en) | Electric control device for hoisting steel plate electro-permanent magnet | |
| CN203368136U (en) | AC/DC power supply non-delay switching system | |
| CN201732732U (en) | Small voltage controlling device of relay | |
| CN201853156U (en) | Novel relay type alternating current regulated power supply | |
| CN101393821B (en) | Energy accumulation type DC suction and DC keeping circuit for AC contactor | |
| CN106505728B (en) | Power supply control loop of wind power doubly-fed converter in grid connection | |
| CN204557177U (en) | For the automatic continuous controller for electric consumption of numerically-controlled machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |