CN2330095Y - Full automatic safety switch - Google Patents
Full automatic safety switch Download PDFInfo
- Publication number
- CN2330095Y CN2330095Y CN 98226133 CN98226133U CN2330095Y CN 2330095 Y CN2330095 Y CN 2330095Y CN 98226133 CN98226133 CN 98226133 CN 98226133 U CN98226133 U CN 98226133U CN 2330095 Y CN2330095 Y CN 2330095Y
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- CN
- China
- Prior art keywords
- relay
- normally
- live wire
- ground wire
- transformer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a fully automatic power utilization safety switch. Three branch circuits are arranged on a power utilization line; the three branch circuits are respectively a current limiting branch circuit, a power supply restoring branch circuit and a voltage limiting branch circuit, wherein the current limiting branch circuit is composed of a current mutual inductor, capacitors, resistors, diodes, a controlled silicon and a relay; the power supply restoring branch circuit is composed of a transformer, diodes, capacitors and a relay; the voltage limiting branch circuit is composed of a voltage dependent resistor and a relay. The utility model can finish three protection functions for over voltage, current limit and power leakage, and can automatically recover power supply. In addition, the utility model has the advantage of simple operation and maintenance.
Description
The utility model relates to a kind of electricity consumption discharge cock.
The present circuit discharge cock that uses, function singleness, or overvoltage protection, or overcurrent protection, and after fault is got rid of, often need the manual reversion power supply, operate loaded down with trivial details.
The purpose of this utility model provides a kind of electricity consumption discharge cock.Promptly when making electrical appliance,, can cut off the power supply immediately, and after supply line's recovery normally, can recover to send electricity again automatically, do not need manual operation when situations such as overcurrent, overvoltage, electric leakage occurring.
For achieving the above object, solution of the present utility model is: three branch roads in parallel are set on the Live wires road, comprise by current transformer B1, capacitor C 1, C2, C3, resistance R 1, R2, diode D1, D2, controllable silicon SCR, the current-limiting protection branch road that relay J 1 and normally-closed contact j1 constitute; The branch road that restores electricity that constitutes by transformer B2, diode D3, capacitor C 4, relay J 2 and normally-closed contact j2～1; The voltage-limiting protection branch road that constitutes by piezo-resistance RMG, relay J 3 and normally-closed contact j3; Other has the warning circuit that is made of normally opened contact j2～2 and loud speaker L.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the circuit diagram of first execution mode of the present utility model;
Fig. 2 is the circuit diagram of second execution mode of the present utility model;
Among the figure, the B1 current transformer; The B2 transformer; J1, J2, J3 relay; R1, R2, R3 resistance; C1, C2, C3, C4 electric capacity; D1, D2, D3 diode; J1, j2～1, j3 normally-closed contact; The j2-2 normally opened contact; The RMG piezo-resistance; SCR, SCR2 controllable silicon; The L alarm.
In electrical schematic diagram shown in Figure 1, the primary coil of current transformer B1 and normally-closed contact j1, j2～1, j3 are serially connected on the live wire; One end of instrument transformer B1 secondary coil is electrically connected with ground wire, extremely links to each other with the control of controllable silicon SCR behind the other end serial connection diode D1; The secondary coil two ends of B1 are parallel with capacitor C 1 and adjustable resistance R1; Capacitor C 2 is connected across between the control utmost point and ground wire of controllable silicon SCR; Controllable silicon SCR is connected across between live wire and the ground wire with after relay J 1 is connected in series; After diode D2, capacitor C 3, resistance R 2 serial connections, also be connected across between live wire and the ground wire; Diode D2 is electrically connected with the anode of controllable silicon SCR with the contact of capacitor C 3; J1 is the normally-closed contact of relay J 1.The primary coil of transformer B2 is in parallel with live wire, serial connection diode D3 in the secondary coil loop, capacitor C 4, relay J 2; J2～1st, the normally-closed contact of relay J 2, j2-2 are the normally opened contacts of J2; Alarm L is connected across between live wire and the ground wire with after normally opened contact j2～2 are connected in series.Piezo-resistance RMG is connected across between live wire and the ground wire with after relay J 3 is connected in series; J3 is the normally-closed contact of relay J 3.
At circuit just often, electric current is through the primary coil of current transformer B1, normally-closed contact j1, j2～1, and j powers to power consumption equipment.If electric current transfinites, the secondary induction voltage of instrument transformer B1 raises, trigger the controllable silicon SCR conducting, relay J 1 gets electric adhesive, normally-closed contact j1 disconnects, and electric current flows to power consumption equipment through the primary coil of transformer B2, because of the primary coil resistance of B2 very big, so electric current is very little, concerning power consumption equipment, can be considered as outage, but be enough to make the secondary coil of B2 to produce induced current, relay J 2 adhesives, normally-closed contact j2～1 disconnects, and normally opened contact j2～2 closures makes alarm L sounding alarm, relay J 1 dead electricity is disconnected, and normally-closed contact j1 engages.After circuit recovers normally, the primary current of transformer B2 weakens, relay J 2 in the secondary loop is disconnected, its normally-closed contact j2～1 engages, and normally opened contact j2～2 disconnect, and loud speaker L stops sounding, electric current is again through the primary coil of instrument transformer B1, normally-closed contact j1, j2～1, j3 is to power devices.If voltage transfinites, the resistance of piezo-resistance RMG reduces, and makes relay J 3 get electric adhesive, and its normally-closed contact j3 disconnects, stop power supply, after voltage was normal, the resistance of piezo-resistance RMG increased again, relay J 3 dead electricity disconnect, and its normally-closed contact j3 is closed again, again to power devices.
In the electrical schematic diagram of second execution mode shown in Figure 2, design the branch road that restores electricity of another kind of concrete structure, its transformer B2 is replaced by bidirectional triode thyristor SCR2, the negative electrode of two-way controlled SCR2 is connected on the live wire, anode series relay J 2 backs are connected with ground wire, be connected on the live wire shunt capacitance C4 between the anode and the control utmost point behind the control utmost point serial connection adjustable resistance R 3.On principle, transformer B2 is identical with bidirectional triode thyristor SCR2 role, but the trigger current of bidirectional triode thyristor SCR2 reduces greatly, is more suitable for having relatively high expectations in electricity consumption and uses in the little circuit of electric current.
In current-limiting protection branch road shown in Figure 1, can use current transformer B1 instead zero sequence current mutual inductor.
The utility model has the advantages that, can not only finish overvoltage, current limliting, three kinds of defencive functions of electric leakage, And after circuit recovers normally, but automatic recovery of power supply, and operation and maintenance is easy.
Claims (3)
1. full-automatic electricity consumption discharge cock, Live wires is provided with overcurrent protection on the road, and three branch roads of overvoltage protection and automatic recovery of power supply is characterized in that: the primary coil of current transformer (B1) and normally-closed contact (j1, j2～1, j3) are serially connected on the live wire; One end of instrument transformer (B1) secondary coil is electrically connected with ground wire, and other end serial connection diode (D1) back extremely links to each other with the control of controllable silicon (SCR); (B1) secondary coil two ends are parallel with electric capacity (C1) and adjustable resistance (R1); Electric capacity (C2) is connected across between the control utmost point and ground wire of controllable silicon (SCR); Controllable silicon (SCR) is connected across between live wire and the ground wire with after relay (J1) is connected in series; After diode (D2), electric capacity (C3), resistance (R2) serial connection, also be connected across between live wire and the ground wire; Diode (D2) is electrically connected with the anode of controllable silicon (SCR) with the contact of electric capacity (C3); (j1) be the normally-closed contact of relay (J1); The primary coil of transformer (B2) is in parallel with live wire, is connected in series diode (D3) electric capacity (C4) relay (J2) in the secondary coil loop; (j2～1) is the normally-closed contact of relay (J2), and (j2～2) are the normally opened contacts of (J2); Alarm (L) is connected across between live wire and the ground wire with after normally opened contact (j2-2) is connected in series; Piezo-resistance (RMG) is connected across between live wire and the ground wire with after relay (J3) is connected in series; (j3) be the normally-closed contact of relay (J3).
2. discharge cock according to claim 1, it is characterized in that: the structure of its branch road that restores electricity, can also be that transformer (B2) is replaced by bidirectional triode thyristor (SCR2), the negative electrode of bidirectional triode thyristor (SCR2) is connected on the live wire, anode series relay (J2) back is connected with ground wire, be connected on the live wire shunt capacitance (C4) between the anode and the control utmost point behind the control utmost point serial connection adjustable resistance (R3).
3. according to claim 1,2 described discharge cocks, it is characterized in that: current transformer (B1) can be replaced with zero sequence current mutual inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98226133 CN2330095Y (en) | 1998-03-06 | 1998-03-06 | Full automatic safety switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98226133 CN2330095Y (en) | 1998-03-06 | 1998-03-06 | Full automatic safety switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2330095Y true CN2330095Y (en) | 1999-07-21 |
Family
ID=33976699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98226133 Expired - Fee Related CN2330095Y (en) | 1998-03-06 | 1998-03-06 | Full automatic safety switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2330095Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106044B (en) * | 2007-08-21 | 2013-03-27 | 万家盛 | Shunt release capable of detecting working state of circuit breaker |
-
1998
- 1998-03-06 CN CN 98226133 patent/CN2330095Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106044B (en) * | 2007-08-21 | 2013-03-27 | 万家盛 | Shunt release capable of detecting working state of circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 1999.07.21 |