CN2419722Y

CN2419722Y - Protecting ignitor for electric power and voltage

Info

Publication number: CN2419722Y
Application number: CN 00209520
Authority: CN
Inventors: 卢孝伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-19
Filing date: 2000-04-19
Publication date: 2001-02-14
Anticipated expiration: 2010-04-19

Abstract

The utility model relates to a protecting starter for an electric power and voltage. The utility model has the circuit structure that a resistor R1 is in cross-over connection between input terminals A and B. The input terminal A is connected with an output terminal A1 through a switch K1 and normally-closed contacts J2 and J1. The input terminal B is connected with an output terminal B1 through a switch K2. Diodes D1 to D4 are connected into a full wave rectifying bridge. One input terminal of the full wave rectifying bridge is connected with the input terminal B through the switch K2, and the other input terminal K3 of the rectifying bridge is connected with the output terminal A1 through a switch K3 and a resistor R4. The coils of a relay J are connected between the two output terminals of the rectifying bridge in series. The utility model has the advantages of simple circuit, low cost, small volume and light weight. The power circuit of an electrical appliance can be cut off by the protecting starter for an electric power and voltage automatically when the voltage and the current are excessively high, which can guarantee the safety of the electrical appliance.

Description

Power supply, voltage protection starter

The utility model relates to the protector of power consumption equipment.

When certain reason increases line voltage rising suddenly or electric current suddenly; the refrigerator of meeting to moving; washing machine; television set has a negative impact; also may make photocopier; air-conditioning; the sensitive electrical equipment of comparisons such as computer suffers badly damaged; also can breaking out of fire when serious; therefore need power supply protector; the big multicircuit complexity of more existing power supply protectors; need to use transformer and integrated circuit; therefore volume is big; the cost height; some power supply protector is not with actuator, can not cut off the power supply circuits of electrical appliance during the power network overvoltage overcurrent automatically, and chimes of doom can only take place; if nobody is on the scene, just may cause electrical appliance to damage.

The purpose of this utility model is to overcome the above problems, and a kind of power supply, voltage protector are provided, and its circuit is simple; cheap, do not make integrated circuit (IC) chip, do not use transformer; when overvoltage takes place, it can cut off the electrical appliance power supply circuits automatically during overcurrent, guarantees the safety of electrical appliance.

The purpose of this utility model is achieved in that

A kind of power supply, voltage protection starter are provided with overvoltage protection device, overcurrent protective device, starter in its casing; It is characterized in that: wherein overvoltage protection device mainly is made up of the normally-closed contact J1 of resistance R 1, relay J, relay J, the normally-closed contact J2 of timing closing; Resistance R 1 is connected across between ac input end A, the B; This ac input end A is connected with ac output end A1 through normally-closed contact J2, the normally-closed contact J1 of K switch 1, timing closing, and ac input end B is connected with ac output end B1 through K switch 2; Overcurrent protective device mainly is made up of diode D1, D2, D3, D4, K switch 3, resistance R 4; Diode D1, D2, D3, D4 are connected into full-wave rectification bridge, an input of this rectifier bridge is connected with ac input end B through K switch 2, another input of this rectifier bridge is connected with ac output end A1 through K switch 3, resistance R 4, is in series with the coil of relay J between two outputs of this rectifier bridge; Starter is made up of K switch 4, resistance R 2, is connected across the two ends of the coil of relay J behind the K switch 4 series resistance R2.

The utility model has following positive beneficial effect:

Power supply of the present utility model, voltage start protection device, circuit structure is simple, and used number of electronic components is very few, does not use transformer, therefore volume is little, in light weight, does not use integrated circuit (IC) chip, therefore cheap, with relay as actuator, when too high or electric current is excessive when line voltage; It can cut off power supply circuits automatically, does not need personnel to intervene, and saves manpower, and its good looking appearance can be widely used in hotel, office, family, dwelling house, protects various electrical equipment not damaged by the power network overvoltage overcurrent.

Now be described in further detail as follows in conjunction with the accompanying drawings:

Fig. 1 is an external form schematic diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Please refer to Fig. 1, Fig. 2:

Power supply, voltage protection starter that this practicality is new are provided with overvoltage protection device, overcurrent protective device, starter in its casing 1; It is characterized in that: wherein overvoltage protection device mainly is made up of the normally-closed contact J1 of resistance R 1, relay J, relay J, the normally-closed contact J2 of timing closing; Resistance R 1 is connected across between ac input end A, the B; This ac input end A is connected with ac output end A1 through normally-closed contact J2, the normally-closed contact J1 of K switch 1, timing closing, and ac input end B is connected with ac output end B1 through K switch 2; Overcurrent protective device mainly is made up of diode D1, D2, D3, D4, K switch 3, resistance R 4; Diode D1, D2, D3, D4 are connected into full-wave rectification bridge, an input of this rectifier bridge is connected with ac input end B through K switch 2, another input of this rectifier bridge is connected with ac output end A1 through K switch 3, resistance R 4, is in series with the coil of relay J between two outputs of this rectifier bridge; Starter is made up of K switch 4, resistance R 2, is connected across the two ends of the coil of relay J behind the K switch 4 series resistance R2.

Circuit working principle of the present utility model is as follows: when the input electric current is excessive; the coil of relay J gets; its normally-closed contact J1 opens; cut off the loop between input A and the output terminals A 1; this device quits work; protected the safety of electrical appliance; if want to restart this device; only need press the button START on the panel shown in Figure 1; this button is the K switch 4 in the circuit diagram, and behind the Closing Switch K4, the electric current on the coil of relay J discharges through resistance R 2; its normally-closed contact J1 closure just restarts circuit.If want to stop this device; only need to press the button STOP on the lower panel; this button is the K switch 3 in the circuit diagram; behind the Closing Switch K3; because of the resistance of resistance R 4 resistances much smaller than resistance R 3; increase so the rectifier bridge output current is anxious; it is electric that the coil of relay J is got, and its normally-closed contact J1 opens, and cuts off this device; the principle of overvoltage protection is: when overtension; voltage on the resistance R 1 also increases, and it is electric to make that the coil of relay J gets, and its normally-closed contact J1 opens; cut off the work of this device; if the work of wanting to recover this device only need be pressed K switch 4, the electric current on the coil of relay J is discharged; make normally-closed contact J1 closure; connect the input and output loop, the timing closing contact J2 of relay J also shields, and even gets behind the coil blackout of relay J at once; because of contact J2 timing closing, external load can not damaged because of frequent power on/off.

Claims

1. a power supply, voltage protection starter are provided with overvoltage protection device, overcurrent protective device, starter in its casing; It is characterized in that: wherein overvoltage protection device mainly is made up of the normally-closed contact J1 of resistance R 1, relay J, relay J, the normally-closed contact J2 of timing closing; Resistance R 1 is connected across between ac input end A, the B; This ac input end A is connected with ac output end A1 through normally-closed contact J2, the normally-closed contact J1 of K switch 1, timing closing, and ac input end B is connected with ac output end B1 through K switch 2; Overcurrent protective device mainly is made up of diode D1, D2, D3, D4, K switch 3, resistance R 4; Diode D1, D2, D3, D4 are connected into full-wave rectification bridge, an input of this rectifier bridge is connected with ac input end B through K switch 2, another input of this rectifier bridge is connected with ac output end A1 through K switch 3, resistance R 4, is in series with the coil of relay J between two outputs of this rectifier bridge; Starter is made up of K switch 4, resistance R 2, is connected across the two ends of the coil of relay J behind the K switch 4 series resistance R2.