CN2512109Y

CN2512109Y - Power circuit breaker with multifunctional protections

Info

Publication number: CN2512109Y
Application number: CN 02221286
Authority: CN
Inventors: 董世荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-15
Filing date: 2002-01-15
Publication date: 2002-09-18
Anticipated expiration: 2012-01-15

Abstract

The utility model relates to a power circuit breaker with multifunctional protections, wherein, input terminals and output terminals of commercial power, an operating mechanism and a rest button are arranged in a shell; overcurrent protection and leakage protection are arranged inside the shell; overvoltage protection formed by a controllable silicon voltage-dividing trigger circuit is also arranged inside the shell; the working voltage of voltage division and controllable silicon is supplied by a rectifier circuit connected with a leakage release coil. The power circuit breaker with the structure is arranged at a commercial power inlet wire end of users, and can automatically cut off power when the current or the voltage of the commercial power exceeds a set value, or when electrical apparatus equipment has electric leakage, human body electric shock, overload or short circuit, which effectively protects the electrical apparatus equipment and avoids fire hidden trouble caused by the above. The utility model is simple in structure, low in cost, high in reliability and easy to manufacture.

Description

Power circuit breaker with multifunction protection

Technical field

The utility model relates to a kind of electric power tripper, especially a kind of power circuit breaker with overvoltage, overcurrent, electric leakage multifunction protection.

Background technology

According to the knowledge of the applicant, see repeatly on the medium that the serious superpressure of civil power causes that electric equipment damages, trace it to its cause and be: civil power is the single-phase 220V voltage that is formed by arbitrary phase and ground in the three-phase voltage, three phase line common zero lines are (if use zero line respectively, to cause circuit to lay difficulty, also will use a large amount of copper electric wires), several phase currents all flow through zero line, easily cause zero line fusing, zero line also can rupture because of corrosion.In recent years, the standard of living along with people improves user's sharp increase of use domestic electric appliance, particularly high-power electric appliances such as excess load use air-conditioning, warmer.In case the zero line fracture, it is the 380V power supply that user institute electrical appliance (as air-conditioning, refrigerator, colour TV, VCD, warmer, computer etc.) will become the two-phase power supply, and present domestic electric appliance does not all design the mains supply over-voltage protecting function.Though commercially available have a power regulator, its power is little, price is expensive, volume is big, of poor quality.Power regulator damages easily when the serious superpressure of civil power, and therefore weight person's breaking out of fire is not accepted by citizen.

At present the circuit breaker at the control civil power 220V power supply of installation such as dwelling house and office building, market, hotel almost adopts " the low-voltage circuit breaker switch " with overcurrent protection function, and this switch combines application with commercially available " residual current circuit breaker " and just constituted overcurrent, residual current circuit breaker.Though this circuit breaker has been widely used in using single-phase 220V voltage occasion; carry out power supply control; but there is not over-voltage protection function; in case the zero line fracture takes place; to cause civil power significantly to rise; cause electric equipment to damage, more seriously then will produce a large amount of heats, fire hazardous in electric equipment because of action of high voltage.

Summary of the invention

The purpose of this utility model is intended to avoid above-mentioned and damages and cause thus the drawback of fire because of the serious superpressure of mains supply causes electric equipment; the applicant improves on the basis of existing " low-voltage circuit breaker switch " and " residual current circuit breaker "; designed a kind of simple in structure; practical, electrical equipment is had the power circuit breaker of multifunction protection.

The purpose of this utility model is achieved like this: a kind of power circuit breaker with multifunction protection; on housing, have civil power input wires terminal and civil power output wiring terminal and operating mechanism and reset button; in housing, have the switch contacts and overcurrent the tripping coil overcurrent protection that constitutes and the tripping coil that leaks electricity that are subjected to operating mechanism control; has the magnetic force push rod between this electric leakage tripping coil and the switch contacts; also have the overvoltage protection that is made of controllable silicon partial pressure type circuits for triggering in housing, divider resistance and silicon controlled operating voltage are provided by the rectification circuit that is connected on the electric leakage tripping coil.

Also have the earth leakage protective that is made of zero sequence current mutual inductor and thyristor gating circuit and the tripping coil that leaks electricity in the described housing, resistance that is connected with the civil power output and normally opened contact switch reach around the coil of zero sequence current mutual inductor and constitute detection of electrical leakage.

The divider resistance of described overvoltage protection links to each other with the silicon controlled control end through trigger tube.

Described overvoltage protection adopts integrated circuit or module.

Shared one of described overvoltage protection and earth leakage protective controllable silicon.

As a whole or two splits of described housing.

Described trigger tube adopts voltage-stabiliser tube or two-way trigger tube or neon tube.

The utility model is that existing " low-voltage circuit breaker switch " and " residual current circuit breaker " product are reequiped or made in the lump when producing, it not only kept original product performance, but also increased over-voltage protecting function.This power circuit breaker is installed in user's civil power 220V power inleting terminal; in case the curtage of civil power surpasses set point, or electric equipment electric leakage or person electric shock or load overload or short circuit, can cut off the electricity supply automatically; protect electric equipment effectively, and avoided the disaster hidden-trouble that causes thus.The utility model is simple in structure, cost is low, making is easy.

Description of drawings

Fig. 1 is a structured flowchart of the present utility model.

Fig. 2 is a kind of circuit theory diagrams of Fig. 1.

Fig. 3 is the another kind of circuit theory diagrams of Fig. 1.

Embodiment

Referring to Fig. 1, Fig. 2; this power circuit breaker: on flame-retarded plastic housing 8, be provided with civil power 220V input terminal (1,1 ') and civil power 220V lead-out terminal (7,7 ') and operating mechanism 2, reset button 4, contact switch K2, in housing 8, be provided with earth leakage protective 6, detection of electrical leakage 10, overcurrent protection 3, overvoltage protection 9.Earth leakage protective 6 comprises circuits for triggering and the electric leakage tripping coil B2 that is made of zero sequence current mutual inductor T (with input terminal 1,1 ' pass magnet ring with the phase line and the zero line of lead-out terminal 7,7 ' link to each other) and controllable silicon BT1 and resistance R 4, diode D1, capacitor C 2.Detection of electrical leakage 10 comprises the resistance R 5 that is connected with civil power lead-out terminal (7,7 '), the coil n that normally opened contact K switch 2 reaches around zero sequence current mutual inductor T ₁Overcurrent protection 3 comprises the switch contacts K1 that is connected with input (1,1 ') and the overcurrent tripping coil B1 and the operating mechanism 2 of serial connection.Switch contacts K1 is subjected to tripping coil B1 and operating mechanism 2 controls, is used for connection, deenergization.Overvoltage protection 9 is made of controllable silicon BT2 and circuits for triggering.These circuits for triggering comprise divider resistance (R1, R2), trigger voltage-stabiliser tube W resistance R 3, the capacitor C 1 of (or a point directly with the control end of controllable silicon BT2 linked to each other with lead) and anti-tampering effect.The operating voltage of divider resistance that links to each other with voltage-stabiliser tube W (R1, R2) and controllable silicon BT2 is provided by the bridge rectifier D that is connected on electric leakage tripping coil B2.Between switch contacts K1 and electric leakage tripping coil B2, have magnetic force push rod 5 (push rod can be straight or crooked), be connected with reset button 4 on this push rod 5.When electric leakage or overvoltage take place, the promotion of reset button 4 drawn stems 5 and protruding, overvoltage or electric leakage accident have taken place in expression, after fixing a breakdown, press reset button 4, upwards promote operating mechanism 2.Each components and parts such as the zero sequence current mutual inductor T of described earth leakage protective 6 and detection of electrical leakage 10, electric leakage tripping coil B2 and push rod 5, reset button 4 are the structure of existing " residual current circuit breaker " (as the DZ47LE model etc.); the switch contacts K1 of described overcurrent protection 3, overcurrent tripping coil B1 and operating mechanism 2 components and parts are the structure (as DZ47-60, DZ47-63 model etc.) of existing " low-voltage circuit breaker switch ", housing 8 as a whole or two splits.Housing 8 can adopt shape or other shape of " low-voltage circuit breaker switch " and " residual current circuit breaker " product to be made into one; Housing 8 also can be formed by existing " low-voltage circuit breaker switch " two shell combination with " residual current circuit breaker ", and each components and parts of overvoltage protection 9 are installed in the housing interior (being in the residual current circuit breaker housing) of earth leakage protective 6.Described this structure fabrication becomes to have overvoltage, overcurrent, earth leakage protective power circuit breaker.If remove the element of zero sequence current mutual inductor T and controllable silicon BT1 etc. and detection of electrical leakage be have overvoltage, the power circuit breaker of overcurrent protection.

More than trigger voltage-stabiliser tube W and can use replacements such as diode, two-way trigger tube, neon tube; Controllable silicon single, double all can, can omit rectification circuit D as using bidirectional triode thyristor; Above overvoltage protection 9 can adopt integrated circuit or module, and overvoltage protection also can be realized with voltage stabilizing didoe or piezo-resistance; Above controllable silicon requires withstand voltage greater than more than 600 volts, and resistance adopts 1/8W gold film resistance, and diode is selected for use withstand voltage greater than more than 600 volts.

This power circuit breaker overcurrent protection: when overcurrent takes place civil power output (7,7 '); because of the bimetal leaf of switch contacts K1 is realized the protection of overload inverse time-delay operation; the protection of short circuit instantaneous operation then is by the electromagnetic attraction that produces between the iron core of tripping coil B1 and the armature switch contacts K1 tripping operation to be disconnected, and cutting off the electricity supply reaches overcurrent protection.When protection, under the downward bullet of operating mechanism 2 actions, disconnect with switch contacts K1 this moment.If will make switch contacts K1 closure, must make switch contacts K1 closure with manually upwards promoting operating mechanism 2.

This power circuit breaker earth leakage protective: when the civil power output leaks electricity because of electric equipment or person electric shock.Causing the magnetic field among the zero sequence current mutual inductor T is not 0 with joint efforts, around the coil n of magnet ring ₂Induce voltage, this voltage removes to trigger electric leakage tripping coil B2 after controllable silicon BT1 amplifies, and causes electric leakage tripping coil B2 and produces strong magnetic field; make the iron core of electric leakage tripping coil B2 produce action; iron core promotes push rod 5, and push rod 5 promotes switch contacts K1 again and disconnects rapidly, thereby reaches earth leakage protective.

This power circuit breaker overvoltage protection: when line voltage overrate (more than 280V); raise by the voltage behind the bridge rectifier D; through divider resistance (R1; R2) voltage after also raises; when reaching the trigger voltage of trigger tube W; trigger tube W conducting; make controllable silicon BT2 conducting; the electric current of electric leakage tripping coil B2 is raised to several amperes by 0 moment; make coil B2 produce powerful magnetic force; this magnetic attraction is inserted in the iron core among the coil B2, makes the iron core action, and the iron core action promotes push rod 5 motions; push rod 5 promotes switch contacts K1 again and disconnects rapidly, thereby reaches overvoltage protection.

Referring to Fig. 1, Fig. 3; what this power circuit breaker was different with above enforcement is: without controllable silicon BT2; earth leakage protective 6 and overvoltage protection 9 shared controllable silicon BT realize overvoltage protection by the circuits for triggering of divider resistance (R1, R2) and silicon voltage regulator diode W and diode D2 formation.When line voltage overrate (more than 280V); raise by the voltage behind the bridge rectifier D; voltage behind divider resistance (R1, R2) also raises; the silicon voltage regulator diode W conducting that is triggered; controllable silicon BT is triggered also conducting; the electric current that causes electric leakage tripping coil B2 is raised to several amperes by 0 moment; make coil B2 produce powerful magnetic force; this magnetic attraction is inserted in the iron core among the coil B2; make the iron core action; the iron core action promotes push rod 5 motions, and push rod 5 promotes switch contacts K1 again and disconnects rapidly, thereby reaches overvoltage protection.Protection when overcurrent, electric leakage take place for other is identical with above-mentioned enforcement.

Claims

1, a kind of power circuit breaker with multifunction protection; on housing, have civil power input wires terminal, civil power output wiring terminal and operating mechanism, reset button; in housing, have the switch contacts and overcurrent the tripping coil overcurrent protection that constitutes and the tripping coil that leaks electricity that are subjected to operating mechanism control; has the magnetic force push rod between this electric leakage tripping coil and the switch contacts; it is characterized in that: also have the overvoltage protection that is made of controllable silicon partial pressure type circuits for triggering in housing, divider resistance and silicon controlled operating voltage are provided by the rectification circuit that is connected on the electric leakage tripping coil.

2, the power circuit breaker with multifunction protection according to claim 1; it is characterized in that: also have the earth leakage protective that is made of zero sequence current mutual inductor and thyristor gating circuit and the tripping coil that leaks electricity in the housing, resistance that is connected with the civil power output and normally opened contact switch reach around the coil of zero sequence current mutual inductor and constitute detection of electrical leakage.

3, the power circuit breaker with multifunction protection according to claim 1 is characterized in that: the divider resistance of overvoltage protection links to each other with the silicon controlled control end through trigger tube.

4, the power circuit breaker with multifunction protection according to claim 1 is characterized in that: overvoltage protection adopts integrated circuit or module.

5, according to claim 1 and 2 described power circuit breakers, it is characterized in that: shared one of overvoltage protection and earth leakage protective controllable silicon with multifunction protection.

6, the power circuit breaker with multifunction protection according to claim 1 is characterized in that: as a whole or two splits of housing.

7, the power circuit breaker with multifunction protection according to claim 3 is characterized in that: trigger tube adopts voltage-stabiliser tube or two-way trigger tube or neon tube.