CN2247386Y

CN2247386Y - Fully automatic breaker for circuit shorting and overloading

Info

Publication number: CN2247386Y
Application number: CN 95237477
Authority: CN
Inventors: 李才玉
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-23
Filing date: 1995-08-23
Publication date: 1997-02-12
Anticipated expiration: 2005-08-23

Abstract

The utility model relates to a fully automatic breaker for circuit shorting and overloading, which belongs to an emergent circuit protective device in power lines. The fully automatic breaker for circuit shorting and overloading is composed of a double-pole double-throw switch, a load device and shell, wherein, a coil L1 of the double-pole double-throw switch is connected in series with an external circuit or the load device through the conversion of the switch. A coil L2 is connected in parallel with the output external circuit through the switch. The breaker has the advantages of simple circuit, few elements, long service life and low cost.

Description

Line short, the full-automatic breaker that transships

The utility model belongs to power circuit emergency protective circuit device.

Along with the raising of living standards of the people, various power consumption equipments are increasing, on the power circuit because short circuit and overcurrent and the situation of breaking out of fire also increases thereupon.For this reason, various line short protectors occurred, it can disconnect when short circuit, and short circuit is eliminated back (or the back is eliminated in the overload electricity consumption) and closed automatically.But make a general survey of existing various product and technical scheme, all have the circuit complexity, element is many.Useful life is not long, can not guarantee the property safety of electricity consumer.

The purpose of this utility model is to provide a kind of line short, transship full-automatic breaker, and it has, and circuit is simple and reliable, element is few.The advantage that cost is low.

Automatic breaker of the present utility model is characterized in that it is made of the coil L of double pole double throw switch double pole double throw switch, load device and housing ₁Coil L connect through the switch switching with external circuit or load device ₂In parallel through switch with the external circuit of output.

The operation principle of this automatic breaker: utilize when line short (or overload) and be serially connected in electricity consumption current in loop inductance coil L ₁The growth of magnetic force seals in the electricity consumption loop with the load device, avoids circuit because of short circuit (or overload) causes accidents such as fire, after short circuit (or overload) is eliminated, utilizes the electric current inductance coil L in parallel with external circuit again ₂Magnetic force switch is restored, the load device shifts out the electricity consumption loop.

The utility model is only used a double pole double throw switch and two electric elements of load device, does not have complicated circuit and valuable device, uses reliable, with low cost.

Fig. 1, normal power circuit schematic diagram of the present utility model.Wherein, 1 double pole double throw switch, 2 load devices, 3 external circuit electrical appliances.

Fig. 2, short circuit of the present utility model (overload) circuit theory diagrams.Wherein, 4 short-circuit lines.

Fig. 3, double pole double throw switch example structure schematic diagram.Wherein, 5 back-moving springs, 6 electric contact reeds, 7 support bars, 8 lock-bit spring leafs, 9 draw bars, 10 armature.

The course of work of the present utility model is as follows: circuit is just often seen Fig. 1, and live wire passes through L ₁Directly connect external circuit, make electrical appliance 3 normal electricity consumptions, at this moment L ₂Be in non operating state with bulb in the machine 2.

When short trouble appears in external circuit, see Fig. 2, when promptly short-circuit line 4 occurring, L ₁Electric current increases, and magnetic field strengthens, so L ₁Immediately commutator 1 is left behind, cutting off the electricity supply is connected with the direct of external circuit, diverted via load device 2 and constitutes the loop with external circuit, and the electric contact reed 6 of switch 1 is locked in down utmost point position by spring leaf 8, at this moment L ₂Be attempted by short-circuit line 4 two ends, L ₂Two ends are because of short-circuit line 4 no-voltages.In case short-circuit line 4 removes, L ₂Add voltage, the magnetic force of its generation makes the electric contact reed 6 of spring leaf 8 release-pushes 1, and breaker recovers ortho states automatically.

Overload situations and short circuit are similar, just L ₁, L ₂Adjust accordingly with the value of load device 2 and to get final product.

The short circuit type component parameters is given an example: to 1 kilowatt external current inductance coil L ₁, line footpath is thicker, and impedance is less than 1 ohm, L ₂Withstand voltage higher, the line footpath is thinner, and impedance is in 12-20 Europe, about load device 25-40W.

Claims

Line short, the full-automatic breaker that transships is characterized in that it is made of the coil L of double pole double throw switch double pole double throw switch, load device and housing ₁Coil L connect through the switch switching with external circuit or load device ₂In parallel through switch with the external circuit of output.