Cable Breakage Detection Device

I. Introduction

EDDQ-3 High-Voltage Cable Outer Sheath Fault Locating InstrumentBased onMURRAY-designed bridge principles, suitable forPost-laying breakdown points of various electrical wires and cables, as well as defects with low insulation resistance but no breakdown.The positioning, as well asFault in High-Voltage Cable's External SheathOur positioning. Of course, it can also be used for...Defect points of various cables within the cable factoryPositioning.

Equipment employs a switch-mode power supply to form a high-voltage constant current source, with no-load voltage- 15,000V, short-circuit current of 30mA. Utilizing a high-sensitivity amplifier and a galvanometer for balance indication, it forms a balanced bridge with a proportional potentiometer, all mounted at a high potential. The test leads are specially designed double-core high-voltage rubber cables. The four-terminal resistance measurement method is employed to avoid errors introduced by lead resistance. The test leads are grounded reliably through a woven shielding layer, and the control buttons on the panel are at ground potential. The bridge is operated via an insulated rod. The high-voltage constant current source and the bridge are integrated into a portable industrial enclosure. Therefore, the equipment is characterized by high voltage, light weight, ease of operation, and safety of use.

Function and Applications

    EDDQ-3 High-Voltage Cable Outer Sheath Fault Locating InstrumentBoasts three functions:

DC Voltage Withstand TestEquipment outputs0-15kV DC voltage, suitable for cable DC withstand voltage testing.

2. Burn-through fault point:Penetrate through burn-through and reduce the resistance of high-resistance and flashover fault points.

3. Fault Pre-LocationEmploying the bridge principle for preliminary positioning, the four-terminal resistance measurement method avoids errors introduced by lead resistance.

Additionally,EDDQ-3 High-Voltage Cable Outer Sheath Fault Locating InstrumentEspecially suitable for:

1、High breakdown voltage after laying, especially for linear high breakdown voltage points that are difficult to achieve low resistance, such as the linear high breakdown voltage of cable intermediate joints.

2、Flashover breakdown points can sustain an arc with a constant current source after breakdown, allowing a stable current to pass through the bridge, which has sufficient sensitivity.

3、Unpenetrated, but points with low resistance, such as when a megohmmeter reveals lower cable resistance, but insulation defects that do not puncture under operating voltage.

Due to the aforementioned features,EDDQ-3 High-Voltage Cable Outer Sheath Fault Locating InstrumentPreferred by the following types of users:：

1. Professional cable maintenance and testing teams: such as cable maintenance and testing teams in large and medium-sized power supply bureaus and large-scale power-consuming enterprises. The majority of cable breakdown points can beEDDQ—3Quickly locate the approximate penetration point. By combining the wave reflection method and the theodolite, we leverage each technique's strengths for faster and more reliable positioning.

2. Small-scale Users: Such as small-scale power supply offices and medium-sized power-consuming enterprises. Cables are not numerous, generally with clear routes, not excessively long, and limited in the number of faults. If a complete set of wave reflection locator is purchased, the price is high, and it requires a high level of quality and experience from the users, making it not an ideal choice. Selection:EDDQ-3 High-Voltage Cable Outer Sheath Fault Locating Instrument，Priced affordably, easy to operate, and capable of meeting daily needs, it's a solid choice.

3. Cable Production Factory: On-site, this equipment can be used to locate various cable breakdown points. By pairing with a digital capacitance meter, it can identify broken wire locations. The device is lightweight and easy to carry to the site for cable user positioning services.