CN2267570Y - Automatic switching over arrangement for instrument power supply - Google Patents

Abstract

The utility model relates to an automatic switching over arrangement for an instrument power supply. The automatic switching over arrangement for an instrument power supply is used in the instrument and the automatic control arrangement power supply return circuit. The utility model comprises a body case, a binding post arranged in the body case, and two throw-in switches of a two-circuit power supply. Two AC contactors which are respectively connected with the guide wire of a working power supply and the guide wire of a spare power supply are arranged in the body case. The AC contactors are mutually locked to work. An automatic switch with overload protection is arranged on the guide wire of an out-put power supply. Because the two AC contactors are mutually locked to work, the spare power supply can throw in automatically and quickly when the working power supply is lost. The out-put power supply is provided with the overload protection, so the power supply is safe and operation is convenient.

Description

The instrument power automatic switching control equipment

The utility model relates to the automatic switching control equipment of the instrument power switching device shifter, particularly a kind of instrument power used in a kind of instrument and the self-con-tained unit current supply circuit.

In electric power system,, must supply power with double circuit to important loop.In the crux power devices, it is standby to guarantee have No. one uninterruption power source to do.In the prior art, two switches of the general employing of the switching of double loop power supply promptly one the tunnel drop in the current supply circuit, and another road is in stand-by state.This exists following point: switch to manually, it is longer to drop into another road time from one tunnel dead electricity; Do not have defencive function, instrument or self-con-tained unit failed shorted cause the working power dead electricity, even the stand-by power supply input also will cause the stand-by power supply fault and loses standby functions.

The purpose of this utility model is to provide a kind of instrument power automatic switching control equipment, makes the power supply of instrument and self-con-tained unit reliable.

For achieving the above object, the utility model adopts following technical proposals: the utility model is the same with prior art include a housing, be installed in the binding post of connection working power lead, stand-by power supply lead and out-put supply lead in the housing and be connected to the working power lead and the stand-by power supply lead on two input switches.It is characterized in that: two A.C. contactors that connect mutual locking work on working power lead and the stand-by power supply lead respectively are installed in housing.In use, one road power work, another road power supply is in standby, in case working power loses, stand-by power supply drops into automatically.Interconnective circuit structure can be designed as between each device in housing: two working power leads are connected two out-put supply leads with two stand-by power supply leads parallel connections; At coil and input switch of the A.C. contactor of connecting separately between two working power leads and between two stand-by power supply leads, and the main contacts of two A.C. contactors is connected on two power leads at self-acting coil place separately; Connect with the other side's working coil in the normally closed auxiliary contact exchange ground of two A.C. contactors.

For the input and output of two-way power supply are indicated, can be between two working power leads and between two stand-by power supply leads, before the main contacts of separately A.C. contactor, connect an input indicator respectively, and after the main contacts of separately A.C. contactor, connect an output indicator and an A.C. contactor often drive auxiliary contact.For to out-put supply indication and instrument fault overload protection, can on the live wire of out-put supply lead, connect the automatic switch of an overload protection, and connect an out-put supply indicator light and a relay in parallel between two out-put supply leads.For double loop power supply and out-put supply state output signal are provided to the user, the contact of relay and another joint of drawing of often opening auxiliary contact and another normally closed auxiliary contact of two A.C. contactors can be connected a custom plug-in that externally connects by lead-in wire.

The utility model has following conspicuous advantage compared with prior art: the utility model utilizes two mutual locking work of A.C. contactor, and when working power lost, stand-by power supply can drop into rapidly automatically; At out-put supply protective device is arranged, to dual input power supply and the indication of out-put supply state,, easy to use so power supply safety is reliable.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the outline drawing of an embodiment of the utility model.

Fig. 2 is that Fig. 1 example is removed panel and demonstrated cut-away view.

Fig. 3 is the circuit theory diagrams of Fig. 1 example.

Fig. 4 is the conspectus that the out-put supply state is drawn signal.

Fig. 5 is the conspectus that the working power state is drawn signal.

Fig. 6 is the conspectus that the stand-by power supply state is drawn signal.

An optimum implementation of the present utility model is: referring to Fig. 1 and Fig. 2; this instrument power automatic switching control equipment includes a housing 1, and 16,12, binding posts of two A.C. contactors 14, two 2,9, overload protection automatic switches of input switch 6, relay 15, five 3,4,5,7,8 and custom plug-ins 13 of indicator light are installed in housing 1.The circuit structure of this instrument power automatic switching control equipment is: referring to Fig. 3, by the double loop power supply lead and the out-put supply lead of binding post 14 external inputs, two working power lead A1, N1 are connected two out-put supply lead A, N with two stand-by power supply lead A2, N2 parallel connections; At coil 1C, 2C and input switch 1K, 2K of the A.C. contactor 16,12 of connecting separately between two working power lead A1, the N1 and between two stand-by power supply lead A2, the N2, and the main contacts 1C of two A.C. contactors 16,12 ₁, 1C ₂, 2C ₁, 2C ₂Be connected separately on two power lead 1A, 1N, 2A, the 2N at self-acting coil 1C, 2C place; The normally closed auxiliary contact 1C of two A.C. contactors 16,12 ₅, 2C ₅Connect with the other side's working coil 2C, 1C in exchange ground.Between two working power lead 1A, the 1N and between two stand-by power supply lead 2A, the 2N, respectively at the main contacts 1C of separately A.C. contactor 16,12 ₁, 1C ₂, 2C ₁, 2C ₂Connect input indicator 1LD, a 2LD before, and at the main contacts 1C of separately A.C. contactor 16,12 ₁, 1C ₂, 2C ₁, 2C ₂That connects output indicator 1HD, a 2HD and an A.C. contactor 16,12 afterwards often opens auxiliary contact 1C ₃, 2C ₃On the live wire A of out-put supply lead A, N, connect the automatic switch ZK of an overload protection, and connect an out-put supply indicator light JD and a relay J J in parallel between two out-put supply lead A, N.Referring to Fig. 4, Fig. 5 and Fig. 6, another of contact a, the b of relay J J, c and two input switch 1K, 2K, two A.C. contactors 16,12 often opened auxiliary contact 1C ₄, 2C ₄With another normally closed auxiliary contact 1C ₆, 2C ₆The joint (d, e, f, g, h, i) of drawing connect a custom plug-in 13 that externally connects by lead-in wire.Between joint a and the joint b signal of telecommunication is arranged, illustrate that out-put supply has; Between joint b and the joint C signal of telecommunication is arranged, the out-put supply dead electricity is described; Between joint d and the joint c signal of telecommunication is arranged, illustrate that working power has; Between joint c and the joint f signal of telecommunication is arranged, the working power dead electricity is described; Between joint g and the joint h electricity is arranged, illustrate that stand-by power supply has; Between joint h and the joint i signal of telecommunication is arranged, the stand-by power supply dead electricity is described.The user can quote these signals of telecommunication by custom plug-in 13 and be shown to the indication dash board.Referring to Fig. 1 and Fig. 2, the bulb that out-put supply automatic switch 6 (being ZK), working power drop into handle, working power input indicator 3 (being 1LD), stand-by power supply input indicator 8 (being 2LD), working power output indicator 4 (being 1HD), stand-by power supply output indicator 7 (being 2HD) and the out-put supply indicator light 5 (being JD) of switch 2 (being 1K) and stand-by power supply input switch 9 (being 2K) is installed on the housing 1 front plate face.Housing 1 back side is used for this device is fixed on the panel board sidewall near the lug 10 that there is band through hole 11 at four jiaos of places.All indicator lights of this device all adopt neon lamp, but long-term work need not more to change the bulb.Custom plug-in 13 adopts the special-purpose hermetically sealed connector of CX type.

Claims (6)

1. the instrument power automatic switching control equipment of using in instrument and the self-con-tained unit current supply circuit, comprise a housing (1), be installed in and connect working power lead (AI in the housing (1), NI), stand-by power supply lead (A2, N2) and out-put supply lead (A, N) binding post (14), and be connected to working power (AI, NI) and stand-by power supply lead (A2, N2) two input switches (2 on, 9), it is characterized in that installing two in housing (1) is connected to working power lead (AI, NI) and stand-by power supply lead (A2, N2) A.C. contactor (16 of last mutual locking work, 12).

2. instrument power automatic switching control equipment according to claim 1, it is characterized in that interconnective circuit structure is between interior each device of housing (1): two working power leads (AI, N2) are connected two out-put supply leads (A, N) with two stand-by power supply leads (A2, N2) parallel connection; A coil (1C, 2C) and an input switch (1K, 2K) in an A.C. contactor (16,12) of connecting separately between two working power leads (AI, NI) and between two stand-by power supply leads (A2, N2), and the main contacts (1C of two A.C. contactors (16,12) ₁, 1C ₂, 2C ₁, 2C ₂) be connected two power leads (1A, the 1N at self-acting coil (1C, 2C) place separately; 2A, 2N) on; Normally closed auxiliary contact (the 1C of two A.C. contactors (16,12) ₅, 2C ₅) connect with the other side's working coil (2C, 1C) to exchange.

3. instrument power automatic switching control equipment according to claim 2 is characterized in that between two working power leads (1A, 1N) and between two stand-by power supply leads (2A, 2N), respectively at the main contacts (1C of separately A.C. contactor (16,12) ₁, 1C ₂, 2C ₁, 2C ₂) connect an input indicator (1LD, 2LD) before, and at the main contacts (1C of separately A.C. contactor (16,12) ₁, 1C ₂, 2C ₁, 2C ₂) connect afterwards an output indicator (1HD, 2HD) and an A.C. contactor (16,12) often open auxiliary contact (1C ₃, 2C ₃).

4. instrument power automatic switching control equipment according to claim 2; the live wire (A) that it is characterized in that out-put supply lead (A.N) is gone up the automatic switch (ZK) that connects an overload protection, and connects an out-put supply indicator light (JD) and a relay (JJ) in parallel between two out-put supply leads (A.N).

5. instrument power automatic switching control equipment according to claim 4, another that it is characterized in that the contact (a.b.c) of relay (JJ) and two input switches (1K, 2K), two A.C. contactors (16,12) often opened auxiliary contact (1C ₄, 2C ₄) and another normally closed auxiliary contact (1C ₆, 2C ₆) the joint (d.e.f.g.h.i) of drawing connect a custom plug-in (13) that externally connects by lead-in wire.

6. instrument power automatic switching control equipment according to claim 4 is characterized in that the bulb of handle, working power input indicator (1LD), stand-by power supply input indicator (2LD), working power output indicator (1HD), stand-by power supply output indicator (2HD) and the out-put supply indicator light (JD) of out-put supply automatic switch (ZK), working power input switch (1K) and stand-by power supply input switch (2K) is installed on housing (1) the front plate face; There is the lug (10) of band through hole (11) at housing (1) back side near four jiaos of places.

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