CN2307363Y

CN2307363Y - Electronic leakage protective circuit-breaker

Info

Publication number: CN2307363Y
Application number: CN 97227531
Authority: CN
Inventors: 王心钤
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-02
Filing date: 1997-10-02
Publication date: 1999-02-10
Anticipated expiration: 2007-10-02

Abstract

The utility model relates to an electronic multifunctional leakage protective circuit breaker which comprises a cover, a base, a binding screw member, an operating mechanism, a switch motion mechanism, a movable contact, a fixed contact, an arc-extinguishing chamber, an overcurrent release, a zero sequence current mutual inductor, a leakage release, an amplifier and a conduit pipe. The utility model is characterized in that a power cut release and a rectifier are also arranged on the base, wherein the rectifier is connected with the binding screw member at the input end by conducting wires, direct current outputted is transferred to the power cut release by conducting wires and the power cut release is connected to the switch motion mechanism. Compared with the existing electronic leakage protective circuit breaker, the utility model has a power cut protection function and can also perform the function of leakage protection during the phase failure of an input power supply.

Description

A kind of electronic type multifunctional electric leakage protective circuit breaker

The utility model belongs to the circuit breaker in the low-voltage electrical apparatus field, refers in particular to residual current (electric leakage) protective circuit breaker.

Circuit breaker generally is made up of contact system, arc control device, free tripping mechanism, operating mechanism, overcurrent trip, under voltage (decompression) release, shunt release, auxiliary contact, shell or framework etc.Residual current (electric leakage) protective circuit breaker, being called for short residual current circuit breaker then also will increase detection of electrical leakage and movement device.

Residual current circuit breaker as the usefulness of earth leakage protective, and can be used as the overload of circuit and short-circuit protection and under normal circumstances as the usefulness of the not frequent starting of the not frequent transitions of circuit and motor in circuit.At present, residual current circuit breaker mainly contains two kinds of forms: electromagnetic type and electronic type.Electromagnetic-type leakage circuit breaker takes place under the situation of the various phases failure at supply power, even has only the energising of live wire also can play the earth leakage protective effect, but it also has weak point: shockproof properties is poor, required precision height, production cost are big.Along with development of electronic technology, adopt the electronic type residual current circuit breaker now more and more.Zheng Mingfang chief editor's the PP227-229 of " low-voltage electrical apparatus is selected servicing manual for use " (China Machine Press 1995) has introduced DZL25 series earth leakage circuit breaker (electronic type)." low-voltage electrical apparatus " (1995NO6) in " DZL118-63 two utmost point residual current circuit breaker " literary composition of writing of the chivalrous grade of Zhu Hong introduced the design feature of this product, it can divide 5 major parts, be contact arc-extinguishing system, operating mechanism, overcurrent trip, zero sequence current mutual inductor and integrated circuit electronic circuit board, by arc control device, operating mechanism, lid, oil damping release, base, zero sequence current mutual inductor, mounting guide rail lug, electronic circuit board, insulation shrouding, moving contact, stationary contact is first-class constitutes." low-voltage electrical apparatus " (1994N O4) Xue builds and waits and writes in: a kind of electronic type residual current circuit breaker of Tianjin MGE Co., Ltd production introduced in " multifunctional electric leakage protective circuit breaker " literary composition, and it mainly is made up of housing, switch motion mechanism, zero sequence current mutual inductor, electronic circuit and actuation coil (release) etc.That these electronic type residual current circuit breaker and comparing of electromagnetic type have is highly sensitive, shockproof properties good, simple in structure, advantage such as production cost is low; under situation that variation, leakage tripping device power supply broken has taken place in supply power; just can not shield; this has brought a lot of inconvenience to the user, particularly counter its evil that is subjected to of Da Yi user (think and adorned residual current circuit breaker with regard to everything is just fine).And, there is not the power-failure protecting function, just may cause danger: have a power failure suddenly, each electrical appliance switch is not turned off, and comes off duty later on or sends a telegram here again night and burn lathe or accurate electrical equipment or cause fire.

The purpose of this utility model is to overcome the above-mentioned defective that existing electronic type residual current circuit breaker exists; a kind of electronic type multifunctional electric leakage circuit breaker is provided; it had both had outside the function that general electronic type leakage, breaking had; can which kind of variation take place at supply power again and also play the personal safety protection, and have the power-failure protecting function.

For achieving the above object; the solution that the utility model is taked is: a kind of electronic type multifunctional electric leakage protective circuit breaker; comprise lid; pedestal; terminal screw spare; operating mechanism; switch motion mechanism; moving contact; fixed contact; arc control device; overcurrent trip; zero sequence current mutual inductor; leakage tripping device; amplifier and lead etc.; the input terminal screw spare of pedestal is connected with fixed contact; arc control device are arranged above the fixed contact; moving contact is arranged in the switch motion mechanism and get in touch with operating mechanism; with lead overcurrent trip is linked to each other with moving contact; one of coil contacts with fixed head in the overcurrent trip; fixed head is connected to lead and passes zero sequence current mutual inductor and link to each other with output terminal screw spare; welding lead links to each other with amplifier in addition; there is leakage tripping device to interrelate in the switch motion mechanism; amplifier links to each other with leakage tripping device with lead; lid cooperates fixing with pedestal; it is characterized in that; release and rectifier in addition have a power failure on pedestal; rectifier links to each other with input terminal screw spare with lead; output DC reaches the power failure release with lead, and the power failure release interrelates in switch motion mechanism.

Because the utility model is provided with the power failure release, Duoed the power-failure protecting function than existing electronic type residual current circuit breaker.When electric power supply plant power failure suddenly or the line upkeep power failure or the power failure that meets accident, the utility model can both disconnect in automatic trip, plays the earth leakage protective effect, avoids the contingent danger of sending a telegram here again that has a power failure.

Be described in further detail below in conjunction with embodiment and accompanying drawing thereof good effect the utility model and generation.

Fig. 1 is the vertical view of present embodiment.

Fig. 2 is the vertical view after present embodiment removes lid (3), protective cover (1) and handle (4).

Fig. 3 is the A-A cutaway view after present embodiment removes lid (3) and protective cover (1).

Fig. 4 is the B-B cutaway view after present embodiment removes lid (3), protective cover (1) and handle (4).

Fig. 5 is the C-C cutaway view after present embodiment removes lid (3), protective cover (1) and handle (4).

Fig. 6 is the operation principle schematic diagram of present embodiment.

Present embodiment is multi-functional four utmost point residual current circuit breaker of electronic type.Input peace four terminal screws (6) and the fixed contact (22) of pedestal (20), on fixed contact (22), arc control device are arranged, vulcanized fiber board (7) embeds arc extinguishing grid pieces (8) and constitutes arc control device, switch motion mechanism (10) is installed on the pedestal (20) with operating mechanism (9) contact, in the middle of overcurrent trip (13) mounting base (20), its coil stretched head contacts with fixed head (14), fixed head (14) welding lead passes zero sequence current mutual inductor (17) and receives output terminal screw spare (6), leakage tripping device (12) and power failure release (11) are installed on switch motion mechanism (10) both sides, amplifier (15) and rectifier (18) are installed in both sides, a back position at pedestal (20), with lead fixed contact (22) is linked to each other with rectifier (18), overcurrent trip (13) links to each other with moving contact (23) in the switch motion mechanism (10), rectifier (18) links to each other with power failure release (11), amplifier (15) links to each other with leakage tripping device (12), lead four utmost points of fixed head (14) welding all pass through bridge rectifier to amplifier (15), test reed (19) and test resistance (16) are arranged on the amplifier (15), the input of lid (3) inserts four form sheets (21), the arc extinguishing effect can be played and the disjunction situation can be observed again, lid (3) is gone up dress test button (5), goes up peace handle (4) at operating mechanism (9) and puts into lid (3) and be fixed on the pedestal (20) with screw (2).For the opinion of safety, set up at the two ends of pedestal (20) protective cover (1), below be stained with the insulation shrouding (24).

The utility model is received in the circuit, during use handle (4) pulled and close the place, drive switch motion mechanism (10) moving contact (23) and fixed contact (22) closure by operating mechanism (9), circuit is logical, and the release (11) that at this moment has a power failure is in normally closed situation, leakage tripping device (12) is in the situation of often opening.During this normal operation, the phasor of each phase current and be zero, zero sequence current mutual inductor (17) secondary coil is no-output then, when electric leakage (residual current) or person electric shock occurring, then induce residual current at zero sequence current mutual inductor (17) secondary coil, and through amplifier (15) amplification, leakage tripping device (12) is subjected to this current excitation to make circuit breaker tripping and open circuit.Because bridge rectifier is all carried out to four utmost point inputs in amplifier (15) front, any line or two wires so input power supply of the present utility model outside line has been broken, electric leakage is taken place out-put supply can both shield in automatic disconnection.When the input power supply has broken when three-way, rectifier (18) does not have direct current to be passed to power failure release (11), and power failure release (11) is threaded off and made circuit breaker tripping and open circuit.If power supply has a power failure suddenly, power failure release (11) is threaded off and is made the circuit breaker automatic trip.In this sense, the utlity model has the power-failure protecting function, this is the unexistent function of present similar residual current circuit breaker, and it forgets to close the accidents caused possibility of switch after having avoided effectively having a power failure.The utility model is the same with other residual current circuit breaker, because overcurrent trip (13) is arranged, also has the overload and the short-circuit function of protection circuit and motor, no longer describes in detail.The utility model meets GB14048.2-94 " low voltage switchgear and control appliance low-voltage circuit breaker " and GB6829-95 " the general requirement of RCD ".

Claims

1; a kind of electronic type multifunctional electric leakage protective circuit breaker; comprise lid (3); pedestal (20); terminal screw (6); operating mechanism (9); switch motion mechanism (10); moving contact (23); fixed contact (22); arc control device; overcurrent trip (13); zero sequence current mutual inductor (17); leakage tripping device (12); amplifier (15) and lead etc.; the input terminal screw spare (6) of pedestal (20) is connected with fixed contact (22); fixed contact has arc control device above (22); moving contact (23) is arranged in the switch motion mechanism (10) and get in touch with operating mechanism (9); with lead overcurrent trip (13) is linked to each other with moving contact (13); one of coil contacts with fixed head (14) in the overcurrent trip (13); fixed head (14) is connected to lead and passes zero sequence current mutual inductor (17) and link to each other with output terminal screw spare (6); welding lead links to each other with amplifier (15) in addition; there is leakage tripping device (12) to interrelate in the switch motion mechanism (10); amplifier (15) links to each other with leakage tripping device (12) with lead; lid (3) cooperates fixing with pedestal (20); it is characterized in that: release (11) and rectifier (18) in addition have a power failure on pedestal (20); rectifier (18) links to each other with input terminal screw spare (6) with lead; output DC reaches power failure release (11) with lead, and power failure release (11) interrelates in switch motion mechanism (10).

2, a kind of electronic type multifunctional electric leakage protective circuit breaker according to claim 1 is characterized in that: lead four utmost points of fixed head (14) welding all pass through bridge rectifier to amplifier (15).