CN2482698Y

CN2482698Y - Data collecting protector for electric cable fault

Info

Publication number: CN2482698Y
Application number: CN01240569.8U
Authority: CN
Inventors: 韩佰锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-03
Filing date: 2001-07-03
Publication date: 2002-03-20
Anticipated expiration: 2011-07-03

Abstract

The utility model relates to a power cable fault testing device, in particular to a power cable fault data collection protecting device. The technology is characterized in that one end of a capacitor C is earthed via a transformer B and/or an inductor L and then recognized as the short circuit; the other end of the capacitor C connects with a tested cable via a sphere gap Js; the voltage signals collected by the transformer B and current signals collected by the inductor L are transmitted to a cable fault detecting device respectively via U1 and U2. Integrating the plurality of testing methods of the prior art, the device has rational structure, reliable safety, exquisite design as well as practical and convenient use.

Description

A kind of data acquisition protecting equipment of power cable fault

The utility model relates to a kind of proving installation of power cable fault, particularly a kind of data acquisition protecting equipment of failure tester for electric power cable front end serial connection.

At present; high resistive fault in the power cable fault; when utilizing electric cable failure detector to detect,, utilize straight sudden strain of a muscle method usually at certain data acquisition and the protective device of electric cable failure detector front end serial connection, towards inductance method, dash concrete grammars such as dodging current method and carry out data acquisition.Facts have proved of decades, existing method or device are very effective.But also there is certain deficiency in actual use.As, towards inductance method measuring circuit complexity, high tension loop and electric cable failure detector device detect the loop and do not isolate (passing through electric resistance partial pressure), and the easy resistance to sparking of high pressure burns out instrument; Divider resistance in inductance method is had relatively high expectations, and must be that high value is high-power.And be generally the non-standard water resistance of self-control in the practical application, use leakage apt to deteriorate for a long time, and volume is big, freeze easily in the northern area use winter etc.; The number of the winning the confidence loop of instrument is at high-pressure side in the inductance method, and instrument and safety of operators are relatively poor.Straight sudden strain of a muscle method, towards inductance method, dash and dodge the current method separate connection circuit arrangement of respectively doing for oneself, be that each connecting circuit all has very big difference, each measuring process can only be used a kind of method, if will use the diverse ways image data, test job need be stopped, reconfiguration circuit or reconfiguration line, operation is very complicated, makes mistakes easily or causes some adverse consequencess.

The purpose of this utility model provides a kind of data acquisition protecting equipment of power cable fault; various test and connecting circuit are integrated in one; both improve the efficient and the reliability of data acquisition, protected tester and operating personnel's safety again, fully overcome the deficiencies in the prior art.

The technical solution of the utility model is described below in conjunction with the accompanying drawings:

Accompanying drawing 1, be the utility model circuit structure schematic diagram.

Accompanying drawing 2, be the utility model embodiment one.

Accompanying drawing 3, be the utility model embodiment two.

Accompanying drawing 4, be the utility model module case structural drawing.

As shown in Figure 1, form a high-voltage DC power supply by pressure regulator VT, transformer T, kenotron D and high pressure energy storage capacitor C, one end of capacitor C is considered as short circuit over the ground by transformer B and/or inductance L, the other end of capacitor C is connected with tested cable by ball crack Js, and secondary U1, the U2 of transformer B and inductance L link to each other with electric cable failure detector respectively.During work, when the DC voltage on the capacitor C is enough high (generally at several kilovolts～tens kilovolts), shape ball crack, the garden Js that diameter is about 5～50mm was punctured by moment, also Method of Cable Trouble Point is punctured simultaneously, therefore, 3 ends of Fig. 1 just have momentary pulse electric current and voltage signal to ground, voltage signal collects by transformer B and by U1 output, current signal collects by the solenoid type inductance L and exported by U2.U1, U2 can be input to voltage signal and current signal in the various electric cable failure detectors, and with 1 or 2 high-pressure section isolate fully, testing tool and tester are in a safe condition.Inductance L is made up of the hollow solenoid of 5～10 circles, and capacitor C 3 ends can pass inductance L ground connection, and transformer B is made up of the high frequency winding type transformer of 2～1000 to 0.1～100 circles.

Embodiment one, as shown in Figure 2, transformer B and inductance L also can be distinguished separately lead-in wire and by K switch and ground short circuit under capacitor C.

Embodiment two, as shown in Figure 3, transformer B is arranged between ball crack Js and the tested cable, and inductance L is arranged between capacitor C and the ground wire.

The utility model circuit and electronic devices and components have multiple textural association form, or ball crack Js, inductance L, transformer B combination are set to one (as Fig. 1,4), or directly be contained in inductance L, transformer B in the testing tool, ball crack Js is a separate component (as Fig. 2), or inductance L, transformer B be a separate component, and ball crack Js is a separate component, or ball crack Js and transformer B be a separate component, and inductance L is a separate component (as Fig. 3) etc.

Advantage of the present utility model and good effect: rational in infrastructure, safe and reliable, deft design, practicality is just Take, drawn the advantage of prior art, various test and the one of collection prior art.

Claims

1. A data acquisition and protection device for power cable faults. A high-voltage DC power supply is composed of a voltage regulator VT, a transformer T, a high-voltage rectifier diode D, and a high-voltage energy storage capacitor C. It is characterized in that: one end of the capacitor C passes through the transformer B and /or the inductance L is regarded as a short circuit to the ground, the other end of the capacitor C is connected to the cable under test through the ball gap Js, and the transformer B and the secondary U1 and U2 of the inductance L are respectively connected to the cable fault tester.

2. The cable fault data acquisition and protection device according to claim 1, characterized in that: the transformer B and the inductance L are lead separately under the capacitor C and are short-circuited to the ground through the switch K.

3. The cable fault data acquisition and protection device according to claim 1, characterized in that: the transformer B is set between the ball gap Js and the cable under test, and the inductance L is set between the capacitor C and the ground wire.

4. The cable fault data acquisition and protection device according to claim 1, characterized in that: the inductance L is composed of a hollow coil with 5-10 turns, and the transformer B is a high-frequency winding with a ratio of 2-1000 turns to 0.1-100 turns Formed by a transformer, the ball gap Js is spherical with a diameter of 5-50 mm.

5. The cable fault data acquisition and protection device according to claim 1, various structural combinations of circuits and electronic components, characterized in that: either the ball gap Js, the inductor L, and the transformer B are combined into one, or the Inductor L and transformer B are directly installed in the test instrument, ball gap Js is an independent body, or inductor L and transformer B are an independent body, ball gap Js is an independent body, or ball gap Js and transformer B are an independent body , the inductance L is an independent body.