CN2478117Y

CN2478117Y - Voltage resistance experimental appts. having safety protective high voltage output switching switch

Info

Publication number: CN2478117Y
Application number: CN 01220505
Authority: CN
Inventors: 林睦钧
Original assignee: Chyng Hong Electronic Co Ltd
Current assignee: Chyng Hong Electronic Co Ltd
Priority date: 2001-03-22
Filing date: 2001-03-22
Publication date: 2002-02-20
Anticipated expiration: 2011-03-22

Abstract

The utility model relates to a withstand voltage test device which is provided with a safety protective high voltage output change-over switch, including a start-up press switch and a stop press switch to respectively control whether high voltage is output or not; the utility model is characterized in that the start-up press switch is provided with two groups of connection point, and the connection point sends a voltage signal to an and-gate through a reference voltage, and the high voltage is controlled to output by the and-gate. A stop press switch is also provided with two groups of connection point, and the connection point sends the voltage signal to an or-gate through a reference voltage, and the high voltage is controlled to close by an or-gate. The withstand voltage test device can be provided with safer on and off protection, the control is reliable and safety is fine.

Description

Puncture tester with safeguard protection high pressure output dip switch

The utility model relates to a kind of puncture tester with safeguard protection high pressure output dip switch.

General electric equipment products are before dispatching from the factory, for guaranteeing the good of quality, all must be through the test of quality management, yet in the middle of quality control test, need through high pressure resistant, insulation, the test of security regulations such as ground connection can be approved, wherein pay attention to the most with high pressure resistant part, high voltage bearing test mainly is in order to check the leakage current of electric equipment products, when leakage current value surpasses certain standard, represent described electric equipment products to use the doubt that has electric leakage in the future, therefore, utilize " dielectric strength tester " can test the security of various electric equipment products, high voltage bearing degree is to guarantee user's safety.

And when using the withstand voltage degree of described dielectric strength tester test electrical equipment, must earlier dielectric strength tester be utilized the connection of electric wire and electric appliance casing and power lead wiring respectively to be measured, cut the power switch of dielectric strength tester again, carry out high voltage bearing test so that treat electricity measurer by dielectric strength tester output high pressure, power switch inner structure at described dielectric strength tester, as Fig. 1, shown in 2, described power switch generally is separately by a kind of switch of normal opened contact or a kind of switch of normally closed contact constitutes, so-called normal opened contact switch is one to be the contact switch of open-circuit condition, the normally closed contact switch then is one to be the contact switch of closed circuit state, its user mode, as shown in Figure 1, normally closed contact switch 1: when pressing keys 101, its inner movable contact 102 promptly touches fixed contact 103, and switch to closed circuit state by open-circuit condition, as shown in Figure 2, normally closed contact switch 2: when pressing keys 201, its inner movable contact 202 is promptly thrown off fixed contact 203, and switch to open-circuit condition by closed circuit state, the operating state that uses is just opposite, so the power switch of dielectric strength tester in the past generally all uses the normal opened contact or the switch of normally closed contact to do and opens/close, yet, use described often opening in the past, normally closed

contact switch

1,2, though can opening/closing as dielectric strength tester,, in case the elastic component 104 of described switch, 204 elastic fatigues, or contact (movable contact 102,202 or fixed contact 103, when 203) bad, the action that then can cause its high pressure of described dielectric strength tester to open and close is undesired, at this moment, can start and cause the accident that operating personnel are subjected to high-voltage electric shock, therefore, a dielectric strength tester selects the switch control with high security just to seem extremely important.

Fundamental purpose of the present utility model is to provide a kind of control reliable and the splendid puncture tester with safeguard protection high pressure output dip switch of security.

Puncture tester with safeguard protection high pressure output dip switch of the present utility model includes a startup push switch and and stops push switch; Described startup push switch has two windings point, and described contact is all delivered to a control loop via a reference voltage with voltage signal, by described control loop control output high pressure; The described push switch that stops also to have two windings point, and described contact is all delivered to a control loop via a reference voltage with voltage signal; Close high pressure by control loop control, so that described puncture tester obtains safer ON/OFF protection.

Below by preferred embodiment and accompanying drawing the puncture tester with safeguard protection high pressure output dip switch of the present utility model is elaborated, in the accompanying drawing:

Shown in Figure 1 is the combination section action diagram of normal opened contact switch in the past;

Shown in Figure 2 is the combination section action diagram of normally closed contact switch in the past;

Shown in Figure 3 is the panel front figure of the dielectric strength tester of the utility model one preferred embodiment;

Shown in Figure 4 is the combination section of described preferred embodiment, and the described original state that starts or stops the loop contact switch is described.

Shown in Figure 5 is the combination section action diagram of described preferred embodiment, and the described state that the loop contact switch is pressed and uses that starts or stops is described;

Shown in Figure 6 is the wiring diagram of described preferred embodiment, and contact switch state before and after action in described startup loop is described;

Shown in Figure 7 is the wiring diagram of described preferred embodiment, and described stop loop contact switch state before and after action is described.

Be a preferred embodiment of " puncture tester " of the present utility model as shown in Figure 3 with safeguard protection high pressure output dip switch; with the output of controlling high pressure respectively whether described puncture tester 10 includes one and starts push switch 20 and and stop push switch 30.

As Fig. 4, shown in 6, described startup push switch 20 has 2

winding points

21,22, comprise a normal opened contact 21 and a normally closed contact 22, describedly often open, normally closed

contact

21,22 respectively via a reference voltage 211,221 and one shunt resistance 212,222 deliver to a control loop jointly with voltage signal, described control loop be one with the door 23 (normally closed AND GATE), one input pin is that the loop with normally closed contact 22 joins, the loop that its another input pin then is connected in series behind the not gate 231 with normal opened contact 21 again joins, so, open high pressure output by described control with door 23 control loops that constituted.

Shown in Fig. 4,7, the described push switch 30 that stops to have 2

winding points

31,32, comprise a normal opened contact 31 and normally closed contact 32, describedly often open, normally closed

contact

31,32 delivers to a control loop via a reference voltage 311,321 and a shunt resistance 312,322 with voltage signal respectively jointly, described control loop be one or the door 33 (OR GATE), one input pin is that the loop with normally closed contact 32 joins, the loop that its another input pin then is connected in series behind the not gate 331 with normal opened contact 31 again joins, like this, close high pressure by described or door 33 controls.

About operational motion situation of the present utility model, shown in Fig. 4,6,7, in original state, described normal opened contact the 21, the 31st be open-circuit condition, and described normally closed

contact

22,32 is closed circuit state.

As shown in Figure 5, behind the button 24 of pushing described startup push switch 20.213 of one movable contacts of described normal opened contact 21 touch a fixed contact 214, and transition is closed circuit, one movable contact 223 of described normally closed contact 22 is disengaging fixed contact 224 then, and transition is open circuit, consult Fig. 6, this moment described START loop the circuit flow process promptly by the transition of normal opened contact 21 and normally closed contact 22 and by described reference voltage 211,221, through shunt resistance 212,222 send the transition signal to described and door 23, promptly because of two input pins be all height (Hi) voltage signal export height (Hi) voltage signal to high tension loop 40, to guarantee export high pressure with door 23 this moment.

As shown in Figure 5, when desiring to close high pressure, then push the described button 34 that stops push switch 30.One movable contact 313 of at this moment described normal opened contact 31 touches a fixed contact 314, and transition is closed circuit, one movable contact 323 of described normally closed contact 32 is disengaging fixed contact 324 then, and transition is open circuit, consult Fig. 7, this moment described stop loop the circuit flow process promptly by the transition of normal opened contact 31 and normally closed contact 32 and by described reference voltage 311,321, through shunt resistance 312,322 send the transition signal to described or door 33, this moment or door 33 are promptly exported height (Hi) voltage signal to high tension loop 40 because of arbitrary input pin for high (Hi) voltage signal, to close high pressure.

Therefore, by with door 23 with or door 33 digital control, can stablize and send high pressure really or stop to send high pressure.

And what deserves to be mentioned is, though be to reach stable control with a logic gate (being described and door 23 or door 33) to export high pressure whether purpose in this example, certainly, also can will replace logic gate by diode arrays, or directly import CPU, the function that has stable control equally, this is no longer in conjunction with the accompanying drawings again.

Conclude above-mentioned, because the startup push switch 20 of puncture tester 10 of the present utility model and stop push switch 30 be connect respectively establish one with door 23, or door 33, therefore, in pressing keys 24, after 34, by logical circuit (is described and door 23, or the door 33) digital control, describedly often open, normally closed

contact

21,31,22,32 all can impel described after transition and door 23, or door 33 reliable output high pressure or cutoff highs, therefore, more can guarantee high pressure output or the stable control of whether closing, when start push switch 20 wherein winding point (often open, normally closed contact 21, when 22) breaking down, promptly can't export high pressure, on the contrary, when stop push switch 30 wherein winding point (often open, normally closed contact 31,32) still can reach the purpose of closing high pressure even break down by the contact of another group.So the change-over switch of puncture tester of the present utility model is not only controlled reliable and is had the function of safeguard protection output high pressure.

Claims

1. puncture tester with safeguard protection high pressure output dip switch, with the output of controlling high pressure respectively whether it comprises that one starts push switch and and stops push switch,, it is characterized in that:

Described startup push switch has two windings point, described contact is all delivered to a control loop via a reference voltage with voltage signal, make all reliable start of 2 winding points and during transition by described control loop, described control loop begin output signal and then the output of control high pressure;

The described push switch that stops also to have two windings point, described contact is all delivered to a control loop via a reference voltage with voltage signal, by described control loop, makes arbitrary winding point start and during transition, described control loop gets final product output signal, and then the control high pressure is closed.

2. the puncture tester with safeguard protection high pressure output dip switch as claimed in claim 1 is characterized in that:

The two windings point of described startup push switch is formed by a normal opened contact and a normally closed contact, and the described 2 winding points that stop push switch also being formed by a normal opened contact and a normally closed contact.

3. the puncture tester with safeguard protection high pressure output dip switch as claimed in claim 1 is characterized in that:

The control loop of described startup push switch is mainly one and door assembly.

4. the puncture tester with safeguard protection high pressure output dip switch as claimed in claim 1 is characterized in that:

The described control loop that stops push switch being mainly one or door assembly.