CN202339892U

CN202339892U - Leakage circuit breaker with power interruption time delay function

Info

Publication number: CN202339892U
Application number: CN2011204747311U
Authority: CN
Inventors: 范奇文
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2011-11-25
Filing date: 2011-11-25
Publication date: 2012-07-18
Anticipated expiration: 2021-11-25

Abstract

The utility model discloses a leakage circuit breaker with a power interruption time delay function. The leakage circuit breaker comprises an acquisition unit and a control unit, wherein a control circuit comprises a contact switch and a control chip which are arranged on a phase line and an N line; the control chip is a latch IC54123; the emitter of a first triode is grounded; a fourth capacitor is connected in parallel between the base and the emitter of the first triode; the collector of the first triode is connected with a fourth resistor; the fourth resistor is connected with a power end; the collector of the first triode is connected with a seventh pin of the latch IC54123 through a sixth diode and a seventh diode; a third pin of the latch IC54123 is grounded; a fifth capacitor is connected in parallel between the collector and the emitter of the first triode; the conducting directions of the sixth diode and the seventh diode are opposite; and a node between the sixth diode and the seventh diode is grounded through a sixth capacitor. The leakage circuit breaker occupies a small area, is convenient to assemble, and has good reliability and low cost.

Description

RCCB with outage delay function

Technical field

The utility model belongs to a kind of RCCB with outage delay function.

Background technology

Along with the use of IC-card smart charge kilowatt-hour meter is promoted; Require RCCB to have the function of outage time-delay, to be suitable for the instructions for use of IC-card smart charge kilowatt-hour meter: switch outage time-delay, guarantee the time that user's IC-card is supplemented with money; As long as in the outage time-delay, supplement with money; Switch promptly gets into the normal power supply state, outputs signal to the Ctrl control line by IC-card smart charge electric degree during arrearage, the switch automatic disconnection.

The RCCB of outage time-delay in the market adopts two wiring board combinations respectively: although outage time-delay plate and electric leakage wiring board. and the function of use requirement is satisfied in this combination; But need product inside enough installing spaces are arranged, in order to connect two wiring boards; The inner lead-in wire that connects increases; Owing to reasons such as welding, reduced the product reliability of operation.

Summary of the invention

Big for the volume that overcomes existing RCCB, be not easy to assemble, poor reliability and the high deficiency of cost, the RCCB that the utility model provides a kind of minimizing to take volume, be convenient to assemble, reliability is good and cost is low with outage delay function.

The utility model solves the technical scheme that its technical problem adopted:

A kind of RCCB with outage delay function; Comprise in order to the collecting unit of gathering outlet voltage and the control unit that breaks off in order to control inner contact switch when judgement is in the arrearage state; Said control circuit comprises contact switch and the control chip that is installed in phase line and N line, and said control chip is IC54123 ,Said RCCB also comprises the Ctrl control line; Said Ctrl control line is connected with the base stage of the first triode Q1 with the 5th diode D5 through second resistance R 2 of serial connection; The grounded emitter of the said first triode Q1; Parallel connection the 4th capacitor C 4 between the base stage of the said first triode Q1 and the transmitter; The collector electrode of the said first triode Q1 connects the 4th resistance R 4, and said the 4th resistance is connected with power end, and the collector electrode of the said first triode Q1 is connected with the 7th pin of said IC54123 with the 7th diode D7 through the 6th diode D6; The 3rd pin ground connection of said IC54123; Parallel connection the 5th capacitor C 5 between the collector and emitter of the said first triode Q1, the conducting direction of said the 6th diode D6 and the 7th diode D7 is opposite, and the node between said the 6th diode D6 and the 7th diode D7 is through the 6th capacitor C 6 ground connection.

Further, said Ctrl control line is connected with said phase line or N line.

The beneficial effect of the utility model mainly shows: reduce take volume, be convenient to assembling, reliability is good and cost is low.

Description of drawings

Fig. 1 is the circuit diagram with RCCB of outage delay function.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

With reference to Fig. 1; A kind of RCCB with outage delay function; Comprise in order to the collecting unit of gathering outlet voltage and the control unit that breaks off in order to control inner contact switch when judgement is in the arrearage state; Said control circuit comprises contact switch and the control chip that is installed in phase line and N line, and said control chip is IC54123 ,Said RCCB also comprises the Ctrl control line; Said Ctrl control line is connected with the base stage of the first triode Q1 with the 5th diode D5 through second resistance R 2 of serial connection; The grounded emitter of the said first triode Q1; Parallel connection the 4th capacitor C 4 between the base stage of the said first triode Q1 and the transmitter; The collector electrode of the said first triode Q1 connects the 4th resistance R 4, and said the 4th resistance is connected with power end, and the collector electrode of the said first triode Q1 is connected with the 7th pin of said IC54123 with the 7th diode D7 through the 6th diode D6; The 3rd pin ground connection of said IC54123; Parallel connection the 5th capacitor C 5 between the collector and emitter of the said first triode Q1, the conducting direction of said the 6th diode D6 and the 7th diode D7 is opposite, and the node between said the 6th diode D6 and the 7th diode D7 is through the 6th capacitor C 6 ground connection.

Said Ctrl control line is connected with said phase line or N line.

In the present embodiment, on original universal RCCB typical circuit, increase R2, D5, Q1, R4, R5, C4, C5, D6, nine elements of D7;

Universal RCCB typical circuit amplifies, controls the part of threading off by zero sequence current mutual inductor TA, circuit breaker Q F and detection of electrons and forms.

Alternating voltage is added in the interchange end of incoming cables of bridge rectifier diode through tripping coil, and the direct voltage one tunnel after the rectification is added in the two ends of controllable silicon SCR, and another road is through being added in after the resistance step-down on electric leakage special chip 3 pin and 8 pin, as the working power of chip.

Then chip 7 pin do not remain low level signal when TA detects electric leakage signal or detected electric leakage signal and do not reach operating value; Be that controllable silicon SCR is controlled very low level signal; Main voltage is added in controllable silicon SCR sun negative electrode two ends, and RCCB is in normal operating conditions;

Then chip 7 pin are exported high level signal when the detected electric leakage signal of TA reaches operating value; Be that controllable silicon SCR is controlled very high level signal; The conducting of controllable silicon SCR sun negative electrode, main voltage is added in tripping coil TR two ends, and tripping coil produces enough big suction; The lead agency action, RCCB is in the power-off protection state;

Because transistor collector, emitter are connected on the DC power supply after the full-wave rectification; Therefore no matter CtrL control line phase-connecting wire or N line always are higher than 0 current potential through R2, D5, the filtered current potential of rectification C4, and triode is in the saturation conduction state when guaranteeing operate as normal; This moment, collector potential was near 0 current potential; The current potential that arrives through D6 also is near 0 current potential, not conducting of controllable silicon, switch operate as normal.Increase D6, D7 and mainly be the time delayed signal that prevents to cut off the power supply and interfere with each other a buffer action with electric leakage signal.

IC-card prepayment intelligent ammeter inner contact is broken off during arrearage, sends power-off signal to the Ctrl control line, and the transistor base current potential is 0; Triode ends, and collector electrode rises to high potential, and through R4 C4 is switched on; Adjustment R4 resistance; Can adjust the outage delay time, R5 is the discharge resistance of R4, the precision of the time-delay of guaranteeing during frequent close switch to cut off the power supply.

When the TA zero sequence current mutual inductance detects the electric leakage actuating signal, latching high level signal and trigger controllable silicon by the output of 7 pin through IC54123 internal lock storage, is high voltage thereby make the tripping coil voltage transitions, drives switch and threads off, and realizes creepage protection function.

Claims

One kind have the outage delay function RCCB; Comprise in order to the collecting unit of gathering outlet voltage and the control unit that breaks off in order to control inner contact switch when judgement is in the arrearage state; Said control circuit comprises contact switch and the control chip that is installed in phase line and N line; It is characterized in that: said control chip is the IC54123 latch; Said RCCB also comprises the Ctrl control line, and said Ctrl control line is connected the grounded emitter of said first triode Q1 with the 5th diode D5 with the base stage of the first triode Q1 through second resistance R 2 of serial connection; Parallel connection the 4th capacitor C 4 between the base stage of the said first triode Q1 and the transmitter; The collector electrode of the said first triode Q1 connects the 4th resistance R 4, and said the 4th resistance is connected with power end, and the collector electrode of the said first triode Q1 is connected with the 7th pin of said IC54123 latch with the 7th diode D7 through the 6th diode D6; The 3rd pin ground connection of said IC54123 latch; Parallel connection the 5th capacitor C 5 between the collector and emitter of the said first triode Q1, the conducting direction of said the 6th diode D6 and the 7th diode D7 is opposite, and the node between said the 6th diode D6 and the 7th diode D7 is through the 6th capacitor C 6 ground connection.
2. the RCCB with outage delay function as claimed in claim 1, it is characterized in that: said Ctrl control line is connected with said phase line or N line.