CN204441633U - Possesses the protection plug of power-off tripping operation and superpressure trip avoidance function - Google Patents
Possesses the protection plug of power-off tripping operation and superpressure trip avoidance function Download PDFInfo
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- CN204441633U CN204441633U CN201520059986.XU CN201520059986U CN204441633U CN 204441633 U CN204441633 U CN 204441633U CN 201520059986 U CN201520059986 U CN 201520059986U CN 204441633 U CN204441633 U CN 204441633U
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Abstract
The utility model discloses a kind of protection plug possessing power-off tripping operation and superpressure trip avoidance function; comprise amplifying circuit, release, rectification circuit, power supply indicator circuit, reduction voltage circuit, controllable silicon, zero sequence current mutual inductor and ground line current instrument transformer, be also provided with open-phase protection circuit.The utility model provides a kind of novel earth leakage protective device, and it has: default-phase protection function, and namely L or N holds when power failure or loose contact and cut off load supplying; Overpressure protection function, the protector under "on" position, because cutting off load supplying when supply power voltage exceeds 280V ± 10V; Plug overheat protection function, cuts off the electricity supply when namely protector plug temperature reaches preset temperature.
Description
Technical field
The utility model relates to Electrical Safety resist technology field, especially relates to the protection plug possessing power-off tripping operation and superpressure trip avoidance function.
Background technology
Existing electric leakage protection technology is zero line (N) mainly, phase line (L) is entirely made earth leakage protective device through zero-sequence mutual inductance line simultaneously and is used, and ground wire electrified detection (voltage detecting and current detecting), this type of technology is all based upon supply voltage the basis of continued power must can provide corresponding defencive function, if when just meeting ground wire electrification or machine insulation appearance exception when zero-line open-circuit or the loose contact of electric power system, protector parting system causes the dropout that cannot reset because of mechanical self-latching, ground wire electrification voltage or make machine charged because of the leakage current of insulation damages, if cause electric shock behavior after human body touches, for solving this type of abnormal electrical power supply phenomenon, market also there is power-off trip protection device, because this type of protector is, by electric power system, solenoid is continued adhesive, the tripping mechanism closing of contact is made to reach continued power object, when electric power system power-off or phase shortage, solenoid because of cannot adhesive cause protector cannot powering load to reach protection philosophy, the drawback of this protected mode is: solenoid continued power causes coil heating, long-time serious warming-up effect protector useful life and there is potential safety hazard, under extreme condition, protector will lose defencive function and cause serious consequence.
Utility model content
(1) technical problem that will solve
The purpose of this utility model will overcome above-mentioned shortcoming exactly, aims to provide a kind of protection plug possessing power-off tripping operation and superpressure trip avoidance function.
(2) technical scheme
For solving the problem, the utility model proposes a kind of protection plug possessing power-off tripping operation and superpressure trip avoidance function, comprise amplifying circuit, release, rectification circuit, power supply indicator circuit, reduction voltage circuit, controllable silicon, zero sequence current mutual inductor and ground line current instrument transformer, be also provided with open-phase protection circuit;
Described open-phase protection circuit comprises solenoid, current-limiting resistance, shunt resistance, storage capacitor, the first diode, second diode of release and protects diode, and described current-limiting resistance is arranged between storage capacitor positive pole and solenoid; The positive pole of described first diode connects storage capacitor, and negative pole connects solenoid; Solenoid described in described protection diodes in parallel, described first diode is connected between controllable silicon and solenoid; Described second diode one end connects controllable silicon, and the other end connects shunt resistance one end, and the shunt resistance other end connects storage capacitor positive pole;
This circuit is also provided with superpressure testing circuit.
Further, described superpressure testing circuit comprises the first voltage detector, the first divider resistance, the second divider resistance, the 3rd divider resistance and the 4th divider resistance, the pin 3 of described first voltage detector is connected between the first divider resistance and the second divider resistance, and the pin 2 of described first voltage detector is connected between the 3rd divider resistance and the 4th divider resistance; Described first divider resistance also connects storage capacitor positive pole.
Further, this circuit also comprises overtemperature testing circuit, described overtemperature testing circuit comprises the second voltage detector, thermistor, the 5th divider resistance and the 6th divider resistance, 5th divider resistance, thermistor are connected successively with the 6th divider resistance, described second voltage detector pin 5 is connected between thermistor and the 6th divider resistance, and the second voltage detector pin 6 is connected between the 3rd divider resistance and the 4th divider resistance.
Further, ground wire electrification indicating circuit is provided with between described ground wire and zero line.
Further, the primary coil of described zero sequence current mutual inductor is also provided with test circuit.
(3) beneficial effect
Compared with prior art, the utility model has the following advantages: the utility model provides a kind of novel earth leakage protective device, and it has: default-phase protection function, and namely L or N holds when power failure or loose contact and cut off load supplying; Overpressure protection function, the protector under "on" position, because cutting off load supplying when supply power voltage exceeds 280V ± 10V; Plug overheat protection function, cuts off the electricity supply when namely protector plug temperature reaches preset temperature.
Accompanying drawing explanation
Fig. 1 is the circuit theory schematic diagram possessing the protection plug of power-off tripping operation and superpressure trip avoidance function of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, the utility model proposes a kind of protection plug possessing power-off tripping operation and superpressure trip avoidance function, comprise amplifying circuit, release S1-S2, rectification circuit, power supply indicator circuit, reduction voltage circuit, controllable silicon SCR 1, zero sequence current mutual inductor ZCT1 and ground line current instrument transformer ZCT2, be also provided with open-phase protection circuit; Wherein amplifying circuit is earth leakage protective chip U2, and rectification circuit is diode D1, D2, and power supply indicator circuit is made up of LED 1 and resistance R3, and reduction voltage circuit is dropping resistor R2;
Described open-phase protection circuit comprises solenoid L1, current-limiting resistance R15, shunt resistance R16, storage capacitor C5, the first diode D7, the second diode D9 of release and protects diode D3, and described current-limiting resistance R15 is arranged between storage capacitor C5 positive pole and solenoid L1; The positive pole of described first diode D7 connects storage capacitor C5, and negative pole connects solenoid L1; Described protection diode D3 described solenoid L1 in parallel, described first diode D7 is connected between controllable silicon SCR 1 and solenoid L1; Described second diode D9 one end connects controllable silicon SCR 1, and the other end connects shunt resistance R16 one end, and the shunt resistance R16 other end connects storage capacitor C5 positive pole;
This circuit is also provided with superpressure testing circuit.
Described superpressure testing circuit comprises the first voltage detector U1A, the first divider resistance R9, the second divider resistance R12, the 3rd divider resistance R7 and the 4th divider resistance R13, the pin 3 of described first voltage detector U1A is connected between the first divider resistance R9 and the second divider resistance R12, and the pin 2 of described first voltage detector U1A is connected between the 3rd divider resistance R7 and the 4th divider resistance R13; Described first divider resistance R9 also connects storage capacitor C5 positive pole.
This circuit also comprises overtemperature testing circuit, described overtemperature testing circuit comprises the second voltage detector U1B, thermistor RT, the 5th divider resistance R8 and the 6th divider resistance R14,5th divider resistance R8, thermistor RT are connected successively with the 6th divider resistance R14, described second voltage detector U1B pin 5 is connected between thermistor RT and the 6th divider resistance R14, and the second voltage detector U1B pin 6 is connected between the 3rd divider resistance R7 and the 4th divider resistance R13.
Be provided with ground wire electrification indicating circuit between described ground wire and zero line, change electric routing capacitance C1, resistance R1, neon lamp X1 forms.
The primary coil of described zero sequence current mutual inductor ZCT1 is also provided with test circuit, and test circuit is made up of button switch K 1, resistance R6.
The operation principle of this circuit is as follows:
1, load zero, phase line earth leakage protective
After protector plug access 220V input power, pressure presses return unit switch, and release S1-S2 is closed; indicator light LED1 lights, and supply voltage is through D1 rectification, and R15 current limliting is charged to C5 capacitor; C5 terminal voltage through the first diode D7 to solenoid L1, electricity when controllable silicon SCR 1 provides protection.Controllable silicon obtains electricity and is in protection detected state; Meanwhile, electric current is through resistance R2 current limliting, and C2 capacitor filtering is powered to U1A, U1B, U2, and protector obtains electricity work (this process hereinafter referred: protector obtains electricity work); When load end (output) Lo or No arbitrary end exports electric leakage, zero sequence current mutual inductance coil ZCT1 exports induced voltage, 1 and 2 pin that U2 detects drive circuit are sent in one end after ZCT1, when leakage current reaches preset value, 7 pin export high level through D4, D8 is to control machines pole, controlled silicon conducting, C5 terminal voltage is applied to L1 solenoid two ends instantaneously through D7, coil adhesive drives tripping mechanism that closing contact (S2-S1) is disconnected, and cuts off the effect that load power source plays safeguard protection;
2, earth wire charged protecting (Ei end)
Protector obtains electricity work, ground wire electrification electric current flows out Eo end through Ei, its induction coil ZCT2 be through on E line exports induced voltage, 1 and 2 pin of U2 are delivered on one tunnel respectively after ZCT1, when leakage current reaches preset value, 7 pin of U2 export high level through D4, D8 delivers to SCR1 trigger electrode, controlled silicon conducting, C5 terminal voltage is applied to L1 solenoid two ends instantaneously through D7, coil adhesive drives tripping mechanism that closing contact (S2-S1) is disconnected, and cuts off the effect that load power source plays safeguard protection;
3, open-phase protection (L or N phase shortage)
Protector obtains electricity work, when Li or Ni that power holds open circuit or loose contact (containing AC220V input interruption of power supply), C2 terminal voltage is not enough to maintain Q1 conducting, after Q1 cut-off, C5 terminal voltage delivers to SCR1 trigger electrode through R16, D9, controlled silicon conducting, C5 terminal voltage is applied to L1 solenoid two ends instantaneously through D7, and coil adhesive drives tripping mechanism that closing contact (S2-S1) is disconnected, and cuts off the effect that load power source plays safeguard protection;
4, overpressure protection (280V ± 10V)
Protector obtains electricity work, input Li, when Ni terminal voltage is in pre-determined lower limit voltage, C5 terminal voltage is through current-limiting resistance R9 and the R12 dividing potential drop 2 pin voltages lower than U1A, 1 pin output low level, when voltage is in 280V ± 10V, 3 pin of U1A are more than or equal to 2 pin voltages, 1 pin exports high level through D5, D8 delivers to SCR1 trigger electrode, controlled silicon conducting, and C5 terminal voltage is applied to L1 solenoid two ends instantaneously through D7, coil adhesive drives tripping mechanism that closing contact (S2-S1) is disconnected, and cuts off the effect that load power source plays safeguard protection;
5, protector plug overtemperature prote
Protector obtains electricity work; when overtemperature protection device detects that protector plug temperature reaches preset temperature, C2 terminal voltage is through R8, RT1 and R14 dividing potential drop; when the 5 pin voltages of U1B are higher than 6 pin voltage; 7 pin export high level and deliver to SCR1 trigger electrode through D6, D8, controlled silicon conducting; C5 terminal voltage is applied to L1 solenoid two ends instantaneously through D7; coil adhesive drives tripping mechanism that closing contact (S2, S1) is disconnected, and cuts off the effect that load power source plays safeguard protection.
The utility model provides a kind of novel earth leakage protective device, and it has: default-phase protection function, and namely L or N holds when power failure or loose contact and cut off load supplying; Overpressure protection function, the protector under "on" position, because cutting off load supplying when supply power voltage exceeds 280V ± 10V; Plug overheat protection function, cuts off the electricity supply when namely protector plug temperature reaches preset temperature.
Below be only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. one kind possesses the protection plug of power-off tripping operation and superpressure trip avoidance function, comprise amplifying circuit, release, rectification circuit, power supply indicator circuit, reduction voltage circuit, controllable silicon, zero sequence current mutual inductor and ground line current instrument transformer, it is characterized in that: be also provided with open-phase protection circuit;
Described open-phase protection circuit comprises solenoid, current-limiting resistance, shunt resistance, storage capacitor, the first diode, second diode of release and protects diode, and described current-limiting resistance is arranged between storage capacitor positive pole and solenoid; The positive pole of described first diode connects storage capacitor, and negative pole connects solenoid; Solenoid described in described protection diodes in parallel, described first diode is connected between controllable silicon and solenoid; Described second diode one end connects controllable silicon, and the other end connects shunt resistance one end, and the shunt resistance other end connects storage capacitor positive pole;
This circuit is also provided with superpressure testing circuit.
2. the protection plug possessing power-off tripping operation and superpressure trip avoidance function according to claim 1, it is characterized in that: described superpressure testing circuit comprises the first voltage detector, the first divider resistance, the second divider resistance, the 3rd divider resistance and the 4th divider resistance, the pin 3 of described first voltage detector is connected between the first divider resistance and the second divider resistance, and the pin 2 of described first voltage detector is connected between the 3rd divider resistance and the 4th divider resistance; Described first divider resistance also connects storage capacitor positive pole.
3. the protection plug possessing power-off tripping operation and superpressure trip avoidance function according to claim 1; it is characterized in that: this circuit also comprises overtemperature testing circuit; described overtemperature testing circuit comprises the second voltage detector, thermistor, the 5th divider resistance and the 6th divider resistance; 5th divider resistance, thermistor are connected successively with the 6th divider resistance; described second voltage detector pin 5 is connected between thermistor and the 6th divider resistance, and the second voltage detector pin 6 is connected between the 3rd divider resistance and the 4th divider resistance.
4. the protection plug possessing power-off tripping operation and superpressure trip avoidance function according to claim 1 and 2, is characterized in that: be provided with ground wire electrification indicating circuit between described ground wire and zero line.
5. the protection plug possessing power-off tripping operation and superpressure trip avoidance function according to claim 4, is characterized in that: the primary coil of described zero sequence current mutual inductor is also provided with test circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520059986.XU CN204441633U (en) | 2015-01-28 | 2015-01-28 | Possesses the protection plug of power-off tripping operation and superpressure trip avoidance function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520059986.XU CN204441633U (en) | 2015-01-28 | 2015-01-28 | Possesses the protection plug of power-off tripping operation and superpressure trip avoidance function |
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| CN204441633U true CN204441633U (en) | 2015-07-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207171A (en) * | 2015-09-21 | 2015-12-30 | 余姚市嘉荣电子电器有限公司 | Automatic power-on and power-off control circuit for electric leakage protector |
| CN105406292A (en) * | 2015-01-28 | 2016-03-16 | 余姚市嘉荣电子电器有限公司 | Protection plug with power-off tripping function |
-
2015
- 2015-01-28 CN CN201520059986.XU patent/CN204441633U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406292A (en) * | 2015-01-28 | 2016-03-16 | 余姚市嘉荣电子电器有限公司 | Protection plug with power-off tripping function |
| CN105490101A (en) * | 2015-01-28 | 2016-04-13 | 余姚市嘉荣电子电器有限公司 | Protection plug with power-off tripping and overvoltage tripping functions |
| CN106299908A (en) * | 2015-01-28 | 2017-01-04 | 余姚市嘉荣电子电器有限公司 | Possesses the protection plug of power-off tripping operation and superpressure trip avoidance function |
| CN105490101B (en) * | 2015-01-28 | 2018-07-10 | 余姚市嘉荣电子电器有限公司 | Has the protection plug of power-off tripping and superpressure trip avoidance function |
| CN105406292B (en) * | 2015-01-28 | 2018-07-10 | 余姚市嘉荣电子电器有限公司 | Has the protection plug of power-off tripping |
| CN106299908B (en) * | 2015-01-28 | 2019-07-12 | 余姚市嘉荣电子电器有限公司 | The protection plug for having power-off tripping and superpressure trip avoidance function |
| CN105207171A (en) * | 2015-09-21 | 2015-12-30 | 余姚市嘉荣电子电器有限公司 | Automatic power-on and power-off control circuit for electric leakage protector |
| CN105207171B (en) * | 2015-09-21 | 2018-02-06 | 余姚市嘉荣电子电器有限公司 | Earth leakage protective device powers on/off control circuit automatically |
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