CN215646154U - Plug-in box with built-in isolating switch - Google Patents
Plug-in box with built-in isolating switch Download PDFInfo
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- CN215646154U CN215646154U CN202121130553.0U CN202121130553U CN215646154U CN 215646154 U CN215646154 U CN 215646154U CN 202121130553 U CN202121130553 U CN 202121130553U CN 215646154 U CN215646154 U CN 215646154U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 47
- 238000009499 grossing Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
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- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a jack box with a built-in isolating switch, which relates to the field of switches and comprises: the rectification filtering module is used for converting low-voltage alternating current into low-voltage direct current and providing voltage for the work of the voltage conversion circuit; the voltage conversion circuit is used for performing true root-mean-square direct current conversion on the low-voltage alternating current output by the voltage reduction circuit and outputting cable equal-proportion reduced direct current voltage; the overvoltage detection circuit is used for detecting whether the output voltage of the voltage conversion circuit is overvoltage or not and controlling the relay working circuit to work when the voltage is overvoltage; compared with the prior art, the utility model has the beneficial effects that: the voltage conversion circuit performs true root-mean-square direct current conversion through alternating current, is different from the prior art that alternating current is converted into direct current through diode rectification, and is extremely low in error in a voltage conversion mode, so that the direct current voltage deviation converted from the voltage to be measured is small, and the situation that the cable is disconnected for power transmission is avoided when the cable voltage is normal.
Description
Technical Field
The utility model relates to the field of switches, in particular to a jack box with an isolating switch inside.
Background
The plug box is equivalent to a cable branch joint and is used for assisting in laying cables and completing power coverage, so that power supplied by a power station can radiate the surrounding area. The inside circuit breaker that contains of jack box for through the circuit of disconnection when cable voltage is too big, protection power supply safety.
The circuit breaker that uses at present detects voltage comparatively roughly, and when cable voltage normal appearing, probably appear breaking cable and transporting electricity, need improve.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a jack box with a built-in isolating switch, which solves the problems in the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme:
a jack box with a built-in isolating switch, comprising:
the voltage reduction circuit is used for reducing the high-voltage alternating current transported by the jack box into low-voltage alternating current;
the rectification filtering module is used for converting low-voltage alternating current into low-voltage direct current and providing voltage for the work of the voltage conversion circuit;
the voltage conversion circuit is used for performing true root-mean-square direct current conversion on the low-voltage alternating current output by the voltage reduction circuit and outputting an equal-proportion voltage reduction direct current voltage flowing through the plug box;
the overvoltage detection circuit is used for detecting whether the output voltage of the voltage conversion circuit is overvoltage or not and controlling the relay working circuit to work when the voltage is overvoltage;
the relay working circuit is used for switching off a switch of the switching circuit when the relay working circuit works; when the circuit does not work, the switch of the switch circuit is closed;
the switch circuit is used for conducting the circuit;
the output end of the voltage reduction circuit is connected with the input end of the rectification filter circuit and the first input end of the voltage conversion circuit, the output end of the rectification filter circuit is connected with the second input end of the voltage conversion circuit, the output end of the voltage conversion circuit is connected with the input end of the overvoltage detection circuit, the output end of the overvoltage detection circuit is connected with the input end of the relay working circuit, and the output end of the relay working circuit is connected with the input end of the switch circuit.
As a still further scheme of the utility model: the voltage reduction circuit is composed of a transformer W, one end of the input end of the transformer W is connected with a cable through a switch S2, the other end of the input end of the transformer W is connected with a conductive plate, and the output end of the transformer W is connected with the input end of the rectifying and filtering circuit and the first input end of the voltage conversion circuit.
As a still further scheme of the utility model: the rectifying and filtering circuit is composed of a diode D1, a diode D2, a diode D3, a diode D4, a capacitor C2 and a resistor R1, one end of the output end of the transformer W is connected with the anode of the diode D1 and the cathode of the diode D3, the other end of the output end of the transformer W is connected with the anode of the diode D2 and the cathode of the diode D4, the cathode of the diode D1 is connected with the cathode of the diode D2, the capacitor C2, the resistor R1 and the switch S1, the other end of the switch S1 is connected with a potentiometer RP1, the anode of the diode D3 is connected with the anode of the diode D4, the other end of the capacitor C2 and the other end of the resistor R1, the other end of the potentiometer RP1 is connected with the resistor R2, and the other end of the resistor R2 is connected with a second input end of the voltage conversion circuit.
As a still further scheme of the utility model: the voltage conversion circuit comprises an integrated circuit U1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R3, a resistor R4 and a resistor R5, the other end of the resistor R2 is connected with a pin 3 of the capacitor C3, a resistor R3, a pin 3 of the integrated circuit U1 and a capacitor C5, the other end of the capacitor C5 is connected with a pin 6 of the integrated circuit U1, the other end of the capacitor C3 is connected with a resistor R4, a capacitor C4, a resistor R5, a pin 1 of the integrated circuit U1 and a pin 9 of the integrated circuit U1, the other end of the resistor R3 is connected with the other end of the capacitor C4, the other end of the resistor R4 and a pin 2 of the integrated circuit U1, a pin 4 of the integrated circuit U1 is connected with the capacitor C1, the other end of the capacitor C1 is connected with one end of an output end of a transformer W, and a pin 8 of the integrated circuit U1 is connected with an input end of the voltage detection circuit.
As a still further scheme of the utility model: the overvoltage detection circuit comprises a diode D5 and a diode D6, wherein a No. 8 pin of an integrated circuit U1 is connected with the cathode of a diode D5, the anode of a diode D5 is connected with the anode of a diode D6, and the cathode of a diode D6 is connected with the input end of the relay working circuit.
As a still further scheme of the utility model: the relay working circuit comprises a diode D7 and a relay J2, wherein the cathode of the diode D6 is connected with the cathodes of the relay J2 and the diode D7, the anode of the diode D7 is connected with the other end of the relay J2, and the other end of the relay J2 is grounded.
Compared with the prior art, the utility model has the beneficial effects that: this scheme voltage conversion circuit carries out true root mean square direct current conversion through the alternating current, makes the alternating current turn into the direct current through diode rectification different from in the past, and this kind of voltage conversion mode error is extremely low for the direct current voltage deviation that the voltage that awaits measuring converts into is less, and is more accurate when being used for detecting excessive pressure, prevents that cable voltage from appearing when normal, and disconnection cable fortune transmission of electricity.
Drawings
Fig. 1 is a schematic diagram of a jack box with a built-in isolating switch.
Fig. 2 is a circuit diagram of a jack box with a built-in isolating switch.
Fig. 3 is a pin diagram of AD 536.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1: referring to fig. 1, a jack box with a built-in isolating switch includes:
the voltage reduction circuit is used for reducing the high-voltage alternating current transported by the jack box into low-voltage alternating current;
the rectification filtering module is used for converting low-voltage alternating current into low-voltage direct current and providing voltage for the work of the voltage conversion circuit;
the voltage conversion circuit is used for performing true root-mean-square direct current conversion on the low-voltage alternating current output by the voltage reduction circuit and outputting an equal-proportion voltage reduction direct current voltage flowing through the plug box;
the overvoltage detection circuit is used for detecting whether the output voltage of the voltage conversion circuit is overvoltage or not and controlling the relay working circuit to work when the voltage is overvoltage;
the relay working circuit is used for switching off a switch of the switching circuit when the relay working circuit works; when the circuit does not work, the switch of the switch circuit is closed;
the switch circuit is used for conducting the circuit;
the output end of the voltage reduction circuit is connected with the input end of the rectification filter circuit and the first input end of the voltage conversion circuit, the output end of the rectification filter circuit is connected with the second input end of the voltage conversion circuit, the output end of the voltage conversion circuit is connected with the input end of the overvoltage detection circuit, the output end of the overvoltage detection circuit is connected with the input end of the relay working circuit, and the output end of the relay working circuit is connected with the input end of the switch circuit.
In this embodiment: referring to fig. 2, the voltage dropping circuit is composed of a transformer W, one end of an input end of the transformer W is connected to the cable through a switch S2, the other end of the input end of the transformer W is connected to the conductive plate, and an output end of the transformer W is connected to an input end of the rectifying and filtering circuit and a first input end of the voltage converting circuit.
The conductive plate is connected with the main cable, and the conductive plate is connected with the branch cable through the input end of the transformer and the switch S2. The high voltage flowing through the cable outputs low voltage at the output end of the transformer, so that the purpose of voltage reduction is achieved, and the components are guaranteed not to be damaged during working.
In this embodiment: referring to fig. 2, the rectifying and filtering circuit is composed of a diode D1, a diode D2, a diode D3, a diode D4, a capacitor C2, and a resistor R1, one end of the output end of the transformer W is connected to the anode of the diode D1 and the cathode of the diode D3, the other end of the output end of the transformer W is connected to the anode of the diode D2 and the cathode of the diode D4, the cathode of the diode D1 is connected to the cathode of the diode D2, the capacitor C2, the resistor R1, and the switch S1, the other end of the switch S1 is connected to the potentiometer RP1, the anode of the diode D3 is connected to the anode of the diode D4, the other end of the capacitor C2, and the other end of the resistor 695r 2, the other end of the potentiometer RP1 is connected to the resistor R2, and the other end of the resistor R2 is connected to the second input end of the voltage converting circuit.
The diode D1, the diode D2, the diode D3 and the diode D4 form a bridge rectifier circuit, alternating current is converted into direct current, filtering is carried out through the capacitor C2 and the resistor R1, and the adjustment potentiometer RP1 can change the voltage output by the rectifying and filtering module to the second input end of the voltage conversion module.
In this embodiment: referring to fig. 2 and 3, the voltage conversion circuit includes an integrated circuit U1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R3, a resistor R4, and a resistor R5, wherein the other end of the resistor R2 is connected to the capacitor C3, the pin No. 3 of the integrated circuit U1 of the resistor R3, and the capacitor C5, the other end of the capacitor C5 is connected to the pin No. 6 of the integrated circuit U1, the other end of the capacitor C3 is connected to the resistor R4, the capacitor C4, the resistor R5, the pin No. 1 of the integrated circuit U1, the pin No. 9 of the integrated circuit U1, the other end of the resistor R3 is connected to the other end of the capacitor C4, the other end of the resistor R4, and the pin No. 2 of the integrated circuit U1, the pin No. 4 of the integrated circuit U1 is connected to the capacitor C1, the other end of the capacitor C1 is connected to one end of the output terminal of the transformer W, and the pin No. 8 of the integrated circuit U1 is connected to the input terminal of the voltage detection circuit.
Integrated circuit U1, model AD536, AD536 directly calculates the true root mean square value of any complex input waveform containing ac and dc components. The method provides a crest factor compensation scheme, and the measurement error is 1% when the crest factor reaches up to 7. The wide bandwidth extends the measurement capability to 300kHz with less than 3dB error for signal levels above 100 mV.
In this embodiment: referring to fig. 2, the overvoltage detection circuit includes a diode D5 and a diode D6, a pin 8 of the integrated circuit U1 is connected to a cathode of the diode D5, an anode of the diode D5 is connected to an anode of the diode D6, and a cathode of the diode D6 is connected to an input terminal of the relay operating circuit.
The diode D5 is a voltage regulator diode, the diode D6 is a negative resistance light emitting diode, the voltage on the voltage regulator diode does not reach the rated value, and the negative resistance light emitting diode is turned on to emit light only when the voltage reaches the rated value.
In this embodiment: referring to fig. 2, the relay operating circuit includes a diode D7 and a relay J2, a cathode of the diode D6 is connected to cathodes of the relay J2 and the diode D7, an anode of the diode D7 is connected to the other end of the relay J2, and the other end of the relay J2 is grounded.
When the relay J2 is operated, the switch S2 springs open, and when the relay J2 is not operated, the switch S2 is closed.
The working principle of the utility model is as follows: when the voltage of the jack box is normal, the voltage is output through a conductive plate, an input end of a transformer W, a switch S2 (closed state) and a cable, the transformer W is subjected to voltage reduction output, a rectifying filter circuit finishes converting alternating current into direct current, the working voltage is passed through a voltage conversion circuit, meanwhile, output voltage (low-voltage alternating current) of an output end of the transformer W is output to a No. 4 pin of an integrated circuit U1(AD536) through a capacitor C1, the low-voltage alternating current is subjected to true root-mean-square direct current conversion inside the integrated circuit U1, the direct current is output through a No. 8 pin of the integrated circuit U1, the conductive plate is not subjected to overvoltage through the voltage, a triode V1 is not conducted, and the relay does not work; when the voltage of the jack box is overlarge, the diode D5 and the diode D6 are conducted, the base electrode of the triode V1 is electrified and conducted, the relay J2 works, and the switch S2 pops open to prevent the cable from continuously transmitting power. It is more accurate to detect the excessive pressure, prevents to appear when cable voltage is normal, cuts off cable transmission power.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a built-in isolator's jack box which characterized in that:
this built-in isolator's jack box includes:
the voltage reduction circuit is used for reducing the high-voltage alternating current transported by the jack box into low-voltage alternating current;
the rectification filtering module is used for converting low-voltage alternating current into low-voltage direct current and providing voltage for the work of the voltage conversion circuit;
the voltage conversion circuit is used for performing true root-mean-square direct current conversion on the low-voltage alternating current output by the voltage reduction circuit and outputting an equal-proportion voltage reduction direct current voltage flowing through the plug box;
the overvoltage detection circuit is used for detecting whether the output voltage of the voltage conversion circuit is overvoltage or not and controlling the relay working circuit to work when the voltage is overvoltage;
the relay working circuit is used for switching off a switch of the switching circuit when the relay working circuit works; when the circuit does not work, the switch of the switch circuit is closed;
the switch circuit is used for conducting the circuit;
the output end of the voltage reduction circuit is connected with the input end of the rectification filter circuit and the first input end of the voltage conversion circuit, the output end of the rectification filter circuit is connected with the second input end of the voltage conversion circuit, the output end of the voltage conversion circuit is connected with the input end of the overvoltage detection circuit, the output end of the overvoltage detection circuit is connected with the input end of the relay working circuit, and the output end of the relay working circuit is connected with the input end of the switch circuit.
2. The connector box with built-in isolating switch as claimed in claim 1, wherein the step-down circuit is formed by a transformer W, one end of the input end of the transformer W is connected to the cable through a switch S2, the other end of the input end of the transformer W is connected to the conductive plate, and the output end of the transformer W is connected to the input end of the rectifying-filtering circuit and the first input end of the voltage converting circuit.
3. The jack box with built-in isolating switch of claim 1, wherein the rectifying and smoothing circuit is composed of a diode D1, a diode D2, a diode D3, a diode D4, a capacitor C2 and a resistor R1, one end of the output end of the transformer W is connected with the anode of a diode D1 and the cathode of a diode D3, the other end of the output end of the transformer W is connected with the anode of a diode D2 and the cathode of a diode D4, the cathode of the diode D1 is connected with the cathode of a diode D2, the capacitor C2, a resistor R1 and a switch S1, the other end of the switch S1 is connected with a potentiometer RP1, the anode of the diode D3 is connected with the anode of a diode D4, the other end of a capacitor C2 and the other end of a resistor R1, the other end of the potentiometer RP1 is connected with a resistor R2, and the other end of the resistor R2 is connected with the second input end of the voltage conversion circuit.
4. The connector box with built-in isolating switch as claimed in claim 1, wherein the voltage converting circuit includes an integrated circuit U1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R3, a resistor R4, a resistor R5, the other end of the resistor R2 is connected with a capacitor C3, a pin 3 of an integrated circuit U1 of a resistor R3, a capacitor C5, the other end of the capacitor C5 is connected with a pin 6 of the integrated circuit U1, the other end of the capacitor C3 is connected with a resistor R4, a capacitor C4, a resistor R5, a pin 1 of the integrated circuit U1 and a pin 9 of the integrated circuit U1, the other end of the resistor R3 is connected with the other end of the capacitor C4, the other end of the resistor R4 and a pin 2 of the integrated circuit U1, a pin 4 of the integrated circuit U1 is connected with a capacitor C1, the other end of the capacitor C1 is connected with one end of an output end of a transformer W, and a pin 8 of the integrated circuit U1 is connected with an input end of a voltage detection circuit.
5. The connector box with built-in isolating switch as claimed in claim 1, wherein the overvoltage detection circuit includes diode D5 and diode D6, pin 8 of the integrated circuit U1 is connected to the cathode of diode D5, the anode of diode D5 is connected to the anode of diode D6, and the cathode of diode D6 is connected to the input terminal of the relay operating circuit.
6. The connector box with built-in isolating switch as claimed in claim 5, wherein the relay operating circuit includes diode D7 and relay J2, the cathode of diode D6 is connected to the cathodes of relay J2 and diode D7, the anode of diode D7 is connected to the other end of relay J2, and the other end of relay J2 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121130553.0U CN215646154U (en) | 2021-05-25 | 2021-05-25 | Plug-in box with built-in isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121130553.0U CN215646154U (en) | 2021-05-25 | 2021-05-25 | Plug-in box with built-in isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215646154U true CN215646154U (en) | 2022-01-25 |
Family
ID=79939376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121130553.0U Expired - Fee Related CN215646154U (en) | 2021-05-25 | 2021-05-25 | Plug-in box with built-in isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215646154U (en) |
-
2021
- 2021-05-25 CN CN202121130553.0U patent/CN215646154U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220125 |