CN2153162Y

CN2153162Y - Transistor phase interruption relay

Info

Publication number: CN2153162Y
Application number: CN 93216148
Authority: CN
Inventors: 崔广达
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-18
Filing date: 1993-06-18
Publication date: 1994-01-12
Anticipated expiration: 2003-06-18

Abstract

The utility model relates to a transistor phase interruption relay, which is composed of a primary coil which is connected with a three-phase power supply, a secondary coil which is used as an output miniature transformer, a bridge rectifier circuit which is connected with the output, an RC filter circuit and a transistor switching circuit which is controlled by a voltage stabilizing tube, wherein, one end of each of the three primary coils of the transformer is connected with the three-phase power supply, and the other end is connected together as Y-shaped. The three secondary coils of the transformer are in series connection, the head and the end are used for outputting, and the output end of the voltage stabilizing tube is connected with the base of the transistor. The emitting electrode and the collecting electrode of the transistor are connected with a DC power supply after in series connection with a relay. The utility model has reliable operation, simple structure and small size.

Description

Transistor phase interruption relay

The utility model be a kind of three phase mains is detected and shows the transistor open phase relay of usefulness belong to low-voltage electrical apparatus relay technical field.

In distribution system, three-phase circuit single-phase open circuit often give work normally bring problems, sometimes even can produce the influence of product quality or make the generation of accidents such as electromotor overload.For this reason, people had once designed many phase failure protectors, but all or because of structure, circuit comparatively complicated, or because of reliability undesirable, or because of volume big and unsatisfactory.

The purpose of this utility model is to design the open phase relay that a kind of circuit is simple, the good reliability volume is little, trips or alarm signal to send thus, and makes detection, the motor open-phase protection in service of distribution system obtain good device.

The purpose of this utility model is to realize like this, the primary coil of a three phase mains and a transformer is joined, the voltage output of its secondary coil links with a voltage-stabiliser tube behind rectifying and wave-filtering, the output of voltage-stabiliser tube and transistorized base stage are joined, this transistor is formed a switching circuit, and in relay series connection and this switching circuit.When the three phase mains phase shortage, secondary coil voltage changes, the voltage-stabiliser tube snowslide of leading, and transistor switching circuit conducting thereupon, relay is charged, and relay contact and distribution system interlocking make switch trip or alarm signal.And the above-mentioned transformer that adopts; at the beginning of it; secondary coil is formed by three coils; wherein three of primary coil are propped up coils; the one end is an input; join with three phase mains; the other end joins jointly and forms the Y type, and its secondary coil also is made up of three coils, and its three is in series; and its beginning; end is an output; with voltage-stabiliser tube; transistor switching circuits etc. join, thereby supply with this switching circuit control signal, when making it that phase shortage be arranged; control signal corresponding output is just arranged; thereby send tripping operation; alarm signal, and make the survey of picking up of distribution system, the motor running protection is better solved.

With drawings and Examples structure of the present utility model is further narrated below.

Description of drawings:

Fig. 1 is an overall structure schematic diagram of the present utility model.

Fig. 2 is an arrangements of elements schematic diagram on the printed circuit board (PCB) 2 among Fig. 1.

Fig. 3 is the utility model embodiment 1 electrical principle structural representation.

Fig. 4 is the utility model embodiment 2 electrical principle structural representations.

By Fig. 1～3 as seen, this transistor open phase relay includes the circuit board 2 that is provided with in a housing 1 and the housing, circuit board 2 is provided with a transformer BY, one relay J, one transistor switching circuit, one bridge rectifier, one R, the C filter circuit, it is characterized in that described transformer is general small-sized I/O transformer, its input coil is by 3 coil BY1, BY2, BY3 forms, one end of each coil as input respectively with three phase mains A, B, C joins, and its other end joins jointly, form the Y type, the secondary coil of transformer BY is also by three coil BY4, BY5, BY6 forms, its three is in series and is an opening △ shape, its beginning, terminal (or openend) is output, and through bridge rectifier, after the RC filtering with voltage-stabiliser tube W(W1 or W2) and resistance R 1, R2 joins, voltage-stabiliser tube W(W1 or W2) output and the base stage of transistor G join, the emitter of transistor triode, collector electrode links with DC power supply after being in series with relay J, a relay J two ends diode D in parallel, described housing is provided with the binding post DJ that links with the relay J contact.

Adopt the said structure circuit; in three-phase, lack a phase time; transformer secondary output coil triangle open mouth place has output immediately; thereby the voltage-stabiliser tube W snowslide of leading; make triode G conducting; relay J energising, relay normally open, normally-closed contact just can make power source trip or send sound and optic signal with electric the interlocking mutually, thus the distribution system of making, motor operation obtain signal or protection.

As seen, also can be provided with the luminous tube H of the phase shortage indication usefulness that is in series with relay J on the housing shown in Fig. 1～3.

In the electrical structure diagram of the embodiment shown in Fig. 21, transistor G, relay J connect circuit and voltage-stabiliser tube W1 is by same power supply power supply, embodiment 2 shown in Figure 3 then transistor G, relay J is in series the circuit that connects then by independent DC power supply, both basically identicals from principle and effect.

R3 shown in Fig. 2,3, R4 then are that common regulation voltage is used, just use for technical processing.

Claims

1, the transistor open phase relay includes the circuit board (2) that is provided with in a housing (1) and the housing, circuit board (2) is provided with a transformer (BY), one relay (J), one transistor switching circuit, one bridge rectifier, one R, the C filter circuit, it is characterized in that described transformer is general small-sized I/O transformer, its input coil is by 3 coils (BY1), (BY2), (BY3) form, one end of each coil as input respectively with three phase mains A, B, C joins, and its other end joins jointly and forms the Y type, the secondary coil of transformer (BY) is also by three coils (BY4), (BY5), (BY6) form, its three is in series and is an opening △ shape, its beginning, terminal (or openend) is output, and through bridge rectifier, after the RC filtering with voltage-stabiliser tube W (W1 or W2) and resistance (R1), (R2) join, the base stage of the output of voltage-stabiliser tube (W) and transistor (G) is joined, the emitter of transistor triode, collector electrode links with DC power supply after being in series with relay (J), relay (J) two ends diode (D) in parallel, housing is provided with the binding post (DJ) that links with relay contact.

2, by the described transistor open phase relay of claim 1, it is characterized in that: the luminous tube (H) that also is provided with the phase shortage indication usefulness that is in series with relay (J) on the housing.