Interlocking structure between high-power UPS (Uninterrupted Power Supply) cabinet and external maintenance cabinet thereof

Abstract

An interlocking structure between a high-power UPS cabinet and a bypass cabinet outside the high-power UPS cabinet comprises a key YCS1 connected with a switch QF6 of the bypass cabinet and further comprises an electromagnetic lock KSS used for locking and unlocking the switch QF6, and the electromagnetic lock KSS is also provided with a key YCS2. The utility model designs an electrical and mechanical electromagnetic lock KSS specially used on an external commercial power maintenance bypass switch cabinet, and the lock is electrically and mechanically interlocked with the internal and external commercial power maintenance bypass inlet wires of a UPS. Double linkage of the UPS and an external mains supply maintenance bypass is achieved, and therefore safe and stable operation of the system is achieved.

Description

Technical Field

[0001] The utility model relates to the field of distribution cabinets, in particular to an interlocking structure between a high-power UPS cabinet and an external maintenance bypass cabinet beside it. Background Technique

[0002] In a low-voltage power supply and distribution system of the type such as a large data / communication center / securities center / national computing center, three power supplies including an emergency power supply are often used to supply power to such IT loads to ensure the continuity of power supply.

[0003] The three power supplies are usually: one normal power supply, one standby power supply, and one emergency power supply; the normal power supply mainly uses commercial power, the standby power supply can use diesel generator power generation, and the emergency power supply is usually a large-capacity UPS cabinet.

[0004] Because the loads of the above-mentioned data centers are relatively important IT loads in the first-level loads and usually do not allow power outages, the conversion between the three power supplies requires continuous and uninterrupted operation, which places very high requirements on the emergency power supply. Currently, most countries use relatively advanced online UPS low-voltage cabinets to complete this arduous task; however, generally, the main input commercial power in the online UPS cabinet is first rectified and then inverted to supply power to IT and other loads; there is also a static maintenance bypass loop in parallel with the main input inside the UPS cabinet; at the same time, there is also a commercial power maintenance bypass cabinet outside the UPS; these three power supplies are in a parallel relationship, and only any one of them needs to be closed to supply power to the IT loads behind the UPS. However, neither the internal maintenance bypass nor the external maintenance bypass of the above-mentioned UPS is allowed to operate in parallel with the rectification and inversion main input circuit of the UPS; therefore, it is necessary to interlock the external maintenance bypass with the UPS; currently, the domestic approach is to perform electrical interlocking on both of them, or add a padlock to the switch of the external maintenance bypass. This interlocking method is not comprehensive and reliable; it is very easy to cause misoperation by staff, resulting in damage and failure of the UPS, and then causing power outages in the entire low-voltage power distribution system and the more important IT loads behind. Content of the Utility Model

[0005] To solve the above problems, the present technical solution provides an interlocking structure between a high-power UPS cabinet and an external maintenance bypass cabinet beside it.

[0006] To achieve the above object, the present technical solution is as follows:

[0007] An interlocking structure between a high-power UPS cabinet and an external maintenance bypass cabinet beside it includes a key YCS1 connected to the switch QF6 of the bypass cabinet, and also includes an electromagnetic lock KSS for locking and unlocking the switch QF6, and the electromagnetic lock KSS is also provided with a key YCS2.

[0008] In some embodiments, it further includes a control circuit for driving the electromagnetic lock KSS, which includes;

[0009] A rectification module Power, which receives the commercial power and outputs a direct current;

[0010] A relay 1KA2, whose coil positive pole is connected to the output end of the rectification module Power, and is also connected to the static end of the UPS cabinet. The coil negative pole is connected to the negative pole of the output end of the rectification module Power through a switch QF6. The normally closed end 1KA2 of the relay 1KA2 is connected to the output end of the UPS cabinet;

[0011] A relay 1KA1, whose coil positive pole is connected to the static end of the UPS cabinet, and is also connected to the normally open end 1KA1. The coil negative pole is connected to the output end of the rectification module Power;

[0012] The normally open end 1KA1 is also connected to the input end of the electromagnetic lock KSS, and the electromagnetic lock KSS is provided with a key contact.

[0013] The beneficial effect of this application is:

[0014] This application designs an electro-mechanical electromagnetic lock KSS specifically for the external commercial power maintenance bypass switch cabinet, and interlocks this lock with the internal and external commercial power maintenance bypass incoming lines of the UPS both electrically and mechanically; realizing the dual interlock of the UPS and the external commercial power maintenance bypass, so as to achieve the safe and stable operation of the system. Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments.

[0016] Figure 1 It is the structural schematic diagram of the embodiment of the present invention Figure 1 ;

[0017] Figure 2 It is the structural schematic diagram of the embodiment of the present invention Figure 2 。 Detailed Embodiment

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clear, the following will further describe the present invention in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not used to limit the present invention.

[0019] Please refer to Figure 1-2As shown in the figure, an interlock structure between a high-power UPS cabinet and its external maintenance bypass cabinet includes a key YCS1 connected to the switch QF6 of the bypass cabinet, and also includes an electromagnetic lock KSS for locking and unlocking the switch QF6. The electromagnetic lock KSS is also provided with a key YCS2.

[0020] In this embodiment, it further includes a control circuit for driving the electromagnetic lock KSS, which includes;

[0021] A rectification module Power, which outputs a direct current after receiving commercial power;

[0022] A relay 1KA2, the positive pole of whose coil is connected to the output terminal of the rectification module Power, and is also connected to the static terminal of the UPS cabinet. The negative pole of the coil is connected to the negative output terminal of the rectification module Power through the switch QF6. The normally closed terminal 1KA2 of the relay 1KA2 is connected to the output terminal of the UPS cabinet;

[0023] A relay 1KA1, the positive pole of whose coil is connected to the static terminal of the UPS cabinet, and is also connected to the normally open terminal 1KA1. The negative pole of the coil is connected to the output terminal of the rectification module Power;

[0024] The normally open terminal 1KA1 is also connected to the input end of the electromagnetic lock KSS, and the electromagnetic lock KSS is provided with a key contact.

[0025] This application mainly installs a mechanical opening position lock head and a key YCS on the corresponding switch QF6 on the external maintenance bypass cabinet of the UPS cabinet. This lock head locks and unlocks the breaker incoming line by mechanically rotating clockwise or counterclockwise with the supporting key. It can lock the circuit breaker QF6 in the opening position. Once the circuit breaker QF6 is locked, the closing operation cannot be performed; in addition, only when the circuit breaker is in the locked position can the key on the lock head be pulled out; in the unlocking position, the key cannot be pulled out and can only remain on the lock head;

[0026] In addition, a set of electrical and mechanical electromagnetic lock KSS is installed on the front door panel of the compartment corresponding to the circuit breaker QF6 on the cabinet body. This electromagnetic lock has the same lock head and key YCS as the above-mentioned circuit breaker; this key can be removed from the lock head only by mechanically rotating clockwise or counterclockwise to the corresponding working position, but to rotate and remove this lock, the coil of this electromagnetic lock must be energized and attracted first and at the same time the button on the electromagnetic lock is pressed; and the key of this electromagnetic lock has two working positions: rotating counterclockwise to the end is the locked position, and there is an auxiliary contact KSS-B for sensing the locked position of the key at this position. By the same principle, rotating clockwise to the end is the unlocking position, and there is an auxiliary contact KSS-K for sensing the unlocking position of the key at this position;

[0027] To prevent misoperation, only one key is provided for the above two locks; after this set of electromagnetic lock and key are installed on the cabinet body and the corresponding external maintenance bypass circuit breaker, through the connection of the secondary control line in the attached drawing, the electrical and mechanical interlock between the external maintenance bypass cabinet and the high-power UPS can be perfectly achieved;

[0028] Refer to the attached Figure 2 , this circuit converts the AC220V power into D24V output through the step-down rectification module Power; it consists of the normally open auxiliary contact QF6 of the external maintenance bypass circuit breaker connected in sequence from the positive terminal to the negative terminal of D24V and the relay coil 1KA2;

[0029] Another circuit is paralleled on the above circuit, and this circuit consists of the static bypass signal contact in the transfer cabinet of the UPS and the relay coil 1KA1 connected in series; (Only when the UPS stops inverter operation and switches to the static bypass, the static bypass signal contact of the UPS closes, and the coil of the electromagnetic lock can be energized, and the key rotates to the unlocking position and can be taken out)

[0030] Another circuit is paralleled on the relay coil 1KA1, and this circuit consists of the open contact of the relay 1KA1 and the coil of the electromagnetic lock connected in series.

[0031] And connect the normally open and normally closed contacts of the relay 1KA2 in the above circuit and the normally closed contact of the auxiliary contact KSS-B at the locked position of the electromagnetic lock to the acquisition signal input circuit of the UPS through the secondary wire; (Only when both contacts are closed, that is, QF6 is disconnected and the electromagnetic lock is in the locked position, the UPS can start inverter operation)

[0032] After the above electrical and mechanical interlock is carried out on the UPS and the external maintenance bypass switch QF6, the details of this set of interlock in principle and operation are elaborated below:

[0033] Principle and operation of the UPS running normally to switching to the external maintenance bypass state:

[0034] - The external maintenance bypass circuit breaker QF6 has no key inserted and is locked in the "open" position. (At this time)

[0035] - The UPS module is working in the inverter mode.

[0036] The only key "YCS" is located on the "lock head of the electromagnetic lock KSS" and is in the locked position and cannot be pulled out. Only when the UPS module is in the static bypass mode (inverter off), this key can be released and removed. Transfer to the external maintenance bypass circuit breaker QF6

[0037] The UPS module must be set to the static bypass mode (inverter off), and then the key "YCS" in the "lock head of the electromagnetic lock KSS" can be released.

[0038] Once the key "YCS" is pulled out, the normally closed contact KSS-K of the auxiliary contact at the unlocking position of the electromagnetic lock becomes an open contact. The acquisition signal input circuit of the UPS receives this contact change, causing the UPS inverter to be in an inhibited state and unable to invert.

[0039] Insert the key "YCS" into the maintenance bypass circuit breaker QF6 and rotate it to the unlocking position, then close the circuit breaker. (At this time, the "YCS" key is locked on the circuit breaker and cannot be pulled out)

[0040] Principle and operation of the external maintenance bypass status returning to the UPS inverter operation:

[0041] In the above external maintenance bypass status, the UPS module must be in the static bypass mode (inverter turned off).

[0042] Disconnect the external maintenance bypass circuit breaker QF6, rotate the key to the locking position, and remove the key "YCS".

[0043] Insert the key "YCS" into the "electromechanical electromagnetic lock KSS". Rotating it counterclockwise to the end is the locking position to release the signal that inhibits the inversion of the UPS. (At this time, the "YCS" key is locked on the electromagnetic lock KSS and cannot be pulled out) At this time, the inverter of the UPS module can be started to supply power to the subsequent IT load.

[0044] The technical effect of this solution is

[0045] The overall advantages of this solution are:

[0046] This set of electromechanical electromagnetic lock KSS achieves the purpose of mechanical interlocking through two lock heads and one key. All related operations of the key have anti-misoperation performance. For example, the key cannot be pulled out when it is in a certain position of the lock head, effectively preventing misoperation; and the key on the electromagnetic lock also has an induction coil to prevent misoperation; enabling the operator to only operate correctly with the key according to the procedure, ensuring the simplicity and adaptability of the operation to the greatest extent;

[0047] This set of electromechanical electromagnetic lock KSS realizes relevant electrical interlocking in the UPS and the external maintenance bypass circuit breaker through the circuit breaker and lock head position signals, and the internal bypass output contact signals of the UPS. The electrical interlocking does not require human intervention. It controls the suction of the key induction coil on the electromagnetic lock and the logic of the internal inversion operation of the UPS through the signal mutual transmission of the above contacts to achieve the purpose of interlocking; and the power supply voltage of this interlocking is the safe voltage of DC 24V; preventing the occurrence of accidents where high voltage used in electrical interlocking causes electric shock due to leakage; ensuring the safety of operators to a certain extent;

[0048] This electrical and mechanical interlock not only has the functions of double interlock and anti-misoperation, but also has simple operation steps. As long as the operator follows the above relevant operation procedures, the safety of the operator and the safe and stable operation of this power supply system can be guaranteed to the greatest extent.

[0049] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application. All other principles and basic structures that are the same as or similar to those of the present application are within the protection scope of the present application.

Claims

1. An interlocking structure between a high-power UPS cabinet and its external maintenance cabinet, characterized in that: It includes a key YCS1 connected to the switch QF6 of the bypass cabinet, and also includes an electromagnetic lock KSS for locking and unlocking the switch QF6, and the electromagnetic lock KSS is also provided with a key YCS2.

2. The interlocking structure between a high-power UPS cabinet and its external auxiliary cabinet according to claim 1, characterized in that: Also included is a control circuit for driving the electromagnetic lock KSS, which includes: The rectifier module Power, which receives AC power and outputs DC power; Relay 1KA2, whose coil positive pole is connected to the output end of the rectifier module Power and also connected to the static end of the UPS cabinet, whose coil negative pole is connected to the negative pole of the output end of the rectifier module Power through switch QF6, and whose normally closed end 1KA2 of relay 1KA2 is connected to the output end of the UPS cabinet; Relay 1KA1, the positive pole of its coil is connected to the static end of the UPS cabinet and also connected to the normally open end 1KA1, and the negative pole of its coil is connected to the output end of the rectifier module Power; The normally open terminal 1KA1 is also connected to the input terminal of the electromagnetic lock KSS, and the electromagnetic lock KSS is provided with a key contact.

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