CN2321105Y

CN2321105Y - Automatic transfer device for AC power supply circuit

Info

Publication number: CN2321105Y
Application number: CN 97231882
Authority: CN
Inventors: 潘前鸿
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-30
Filing date: 1997-12-30
Publication date: 1999-05-26
Anticipated expiration: 2007-12-30

Abstract

The utility model relates to an automatic transfer device of a route of a power supply, which is used for controlling the switching of a mainly used power source in alternating current distribution (municipal power) and a spare power source (a self-spare oil machine or the other municipal power). The automatic transfer device can change the route of an AC power supply through changing the close direction of a knife switch, and is characterized in that the rotation or stop and the rotary direction thereof of a bidirectional motor are controlled by a control module. The wrenching of the knife switch is driven by the rotary torque of the motor through a transmission system of a worm gear and worm, and manpower wrenching is replaced by automatic wrenching. The utility model can be automatically transferred, has the safe and reliable advantages that the knife switch can be used for transferring the route of the power supply, and can be realized by that the existing alternating-current distribution panel is improved.

Description

Conversion equipment is freely moved on the Alternating Current Power Supply road

The utility model is to be used for controlling the automatic transfer equipment that switches primary power cource (civil power) and stand-by power supply (providing oily machine or another road civil power for oneself) power supply route in the AC distribution, belongs to AC distribution control appliance field.

Some are important in electric unit (as communications facility, broadcasting equipment, control centre etc.), in order to ensure not interrupting of Alternating Current Power Supply, usually except that one road civil power (or claiming big electrical network) being arranged, one road stand-by power supply route (as providing diesel engine or another road civil power for oneself) is arranged in addition also as the main power supply.In case when main power supply route has a power failure for some reason, switch to the stand-by power supply route.Long-term come, the switching of this Alternating Current Power Supply route, mostly the mode of the knife switch by manually pulling AC distribution panel realizes.Though this mode is reliable, essential Attended mode can't be realized concentrated monitoring, the control of a plurality of electricity consumption facilities.Realize centralized monitor, just must solve the automatic transfer problem of Alternating Current Power Supply.Once the someone imagined the way that replaces changing knife switch with electromagnetic relay and realized automatic conversion, but because unreliable and can't practicability.

The purpose of the utility model just is to provide a kind of closing direction of the power supply knife switch that automaticallyes switch, thereby reaches the automatic transfer equipment of automatic conversion Alternating Current Power Supply route.

This key that changes the automatic transfer equipment of Alternating Current Power Supply route by the closing direction of conversion knife switch be it reversing motor is arranged and control this motor stop or the control module of commentaries on classics and rotation direction thereof with the rotating torque of motor is passed to knife switch and drives the worm and gear of knife switch change closing direction and be connected hasp.Control module goes to control the rotation direction and the time of motor according to the change of electric power thus supplied, and the rotation of motor is slowed down by worm and gear and strengthened moment and drives knife switch change closing direction.

Fig. 1 is a structural representation of the present utility model, and 1 is that control module, 2 is the hasp that is connected between worm and gear 3 and the knife switch 5 for the worm and gears that slow down to increase moment, 4 for reversing motor, 3.Control module 1 has or not according to main signal with current supply circuit, sends the rotation direction of decision motor 2 and the power of time.The rotation of motor 2 drives knife switchs 5 and spins upside down by the worm and gear that is attached thereto 3 and with the hasp 4 that is connected between the knife switch 5, thereby has changed the power supply route of interchange.Control module 1 partly is made up of for 7 liang the power-supply circuit of primary power cource signal extracting circuit 6 and motor 2.

The utlity model has the mode that has both kept traditional maturation, can realize automatic conversion again with the knife switch switching; Not only safety but also to change money few also can be transformed advantages such as application on existing AC distribution panel.

Fig. 2 is the embodiment electrical schematic diagram of control module 1 of the present utility model.As primary power cource signal extracting circuit 6, and relay J is arranged with bridge rectifier in its output cross-over connection ₁Winding.By relay J ₁, J ₂, J ₃With travel switch K ₁, K ₂Constitute the power-supply circuit 7 of motor 2.Relay J ₁The normally opened contact j of changeover contact group _1-13With back contact j _1-11Respectively through relay J ₂And J ₃Back contact group j _2-8-9, j _3-8-9And relay J ₃, J ₂Winding and travel switch k ₁, k ₂Back contact group k _1-1, k _2-1Join with the power supply C that supplies with relay.Relay J ₂And J ₃Group normally opened contact group j _2-6-7With j _2-12-13And j _3-6-7With j _3-12-13Then join with the input of motor 2 and power supply E and D respectively.In order to provide information, in relay J to power supply centralized monitor center ₁, J ₂, J ₃With travel switch K ₁, K ₂The contact group in, drawn F, G, H, I, J, M, N and intelligence sample points such as O, P respectively.

Now the operation principle of this embodiment is made a brief description: when the master uses power supply route normal power supply, AC signal input, then relay J are arranged at input a, the b of signal extracting circuit 6 ₁Action.At this moment J ₁Changeover contact group j _1-11With j _1-12Disconnect, and j _1-13With j _1-12Connect, and make relay J ₃Electric, its normally opened contact group j then _3-6-7And j _3-12-13Connection, motor 2 gets the forward electricity and is just changeing, and drives knife switch 5 to the main route side closure of powering of using by worm and gear.When knife switch 2 and closure put in place, force travel switch K ₁Back contact group k _1-1Disconnect, then make J ₃Dead electricity → motor dead electricity and stopping operating.If it is main for some reason with the power failure of power supply route, the then no AC signal input → J of a, b end ₁Dead electricity → j _1-11With j ₁₂Connection → J ₂By travel switch K ₂Back contact group k _2-1Electric and move → j _2-8With j _2-9Disconnect and J ₂Normally opened contact group j _2-6-7With j _2-12-13Connect, then motor 2 gets oppositely electric and reverses, and at this moment drives knife switch 5 downward (stand-by power supply route) closures.When knife switch 2 stand-by power supply route closures put in place, force travel switch K ₂Back contact group k _2-1Disconnect, then make J ₂Dead electricity → motor 2 dead electricity stop operating, thereby have finished once conversion automatically.If in case the master is normal with the power supply route recovery, then a, b end has the signal input again, then plug-in strip 5 can be swung to the master again automatically with power supply route side, is powered for route by main.The action situation of the variation of electric power thus supplied each time and each relay and travel switch all can obtain corresponding information from F, G, H, I, J, M, N and O, P each point.

Claims

1, a kind of Alternating Current Power Supply route automatic transfer equipment that knife switch is arranged, it is characterized in that being equipped with reversing motor (2) and control motor (2) stop or the control module (1) of commentaries on classics and rotation direction thereof with the rotating torque of motor (2) is passed to knife switch (5) and drives the worm and gear (3) of knife switch (5) change closing direction and be connected hasp (4).

2, Alternating Current Power Supply route automatic transfer equipment as claimed in claim 1 is characterized in that control module (1) is made up of the power-supply circuit (7) of primary power cource signal extracting circuit (6) and motor (2).

3, Alternating Current Power Supply route automatic transfer equipment as claimed in claim 2 is characterized in that with bridge rectifier as primary power cource signal extracting circuit (6), and in its output cross-over connection relay (J is arranged ₁) winding, by relay J ₁, J ₂, J ₃With travel switch K ₁, K ₂Constitute the power-supply circuit (7) of motor (2), relay (J ₁) conversion meet the normally opened contact j of group _1-13With back contact j _1-11Respectively through relay (J ₂) and (J ₃) back contact group j _2-8-9, j _3-8-9And relay (J ₃), (J ₂) winding and travel switch K ₁, K ₂Break group k _1-1, k _2-1Join relay (J with the power supply C that supplies with relay ₂) and (J ₃) normally opened contact group j _2-6-7With j _2-12-13And j _3-6-7With j _3-12-13Then join with the input of motor (2) and feeder ear (E) with (D) respectively.

4, Alternating Current Power Supply route automatic transfer equipment as claimed in claim 2 is characterized in that at the relay road of control module (1) (J ₁), (J ₂), (J ₃) and travel switch k ₁, K ₂The contact group in also leave sampling contact (F), (G), (H), (I), (J), (M), (N) that information is provided to the power supply centralized monitor.(O), (P).