Xzh Test Portable Underground Cable Sheath Fault Locator Xhhd523L Cable Sheath Fault Pinpointer

• Customization: Available
• After-sales Service: Warranty Certificate
• Warranty: 1 Year
• Model NO.: XHHD523L
• Usage: Audio Cable Tester, Coaxial Cable Tester, Digital Cable Tester
• Certification: CE, ISO
• Customized: Customized
• Color: Black
• Transport Package: Wooden Case
• Specification: 490*380*320mm
• Trademark: XZH TEST
• Origin: China Xi'an
• HS Code: 9031809090
• Production Capacity: 2000pieces /Year

Product Description

Product Introduction

XHHD523L Portable Underground Cable Sheath Fault Locator
With the full deployment of the urban network transformation, many power supply bureaus, construction parties, and even design units encountered 110kV XLPE cables for the first time. Due to time constraints and insufficient experience, many cables failed to pass the withstand voltage test (10kV/ 1min). At present, most of the outer sheath is made of HDPE sheath material, which has passed the DC 25kV/5min withstand voltage test in the factory, and the leakage current is as low as tens of μA. Therefore, most of the defects after laying are caused by external force damage during laying, including soil filling and cover. Defects after operation usually include termite bites; water in the grounding box; deterioration of the original defect; moisture penetration of the bifurcated part of the grounding wire reduces the insulation resistance, etc., sometimes because the cable is buried too deep or the surrounding conditions are complicated, so It is very difficult to locate, and some defects cannot be resolved after many years, leaving hidden dangers to the operation.



The output voltage of the high-voltage cable outer sheath fault detector is 10KV and below, which fully meets the Chinese national standard GB50150-2006 cable outer sheath withstand voltage test regulations, including the cable outer sheath handover test and preventive test suitable for cross-interconnect systems And the fault location of the outer sheath of the cable. Quickly and accurately find hidden dangers of 10kv-500kv single-core and three-core high-voltage and ultra-high voltage cable outer sheath grounding faults and large leakage currents. At the same time, it can perform 5kv-10kv on high-density polyethylene and polyvinyl chloride cable outer sheaths, 1 The minute DC withstand voltage test is a special instrument necessary for the maintenance of cable equipment of 10kv-500kv single-core and three-core high-voltage and ultra-high voltage cable operation units, ultra-high voltage cable engineering companies, and various power transmission and transformation engineering companies.


Main features
1. It has automatic protection functions for over-current, over-voltage and overheating;
2. It has zero start protection and is safer and more reliable;
3. Unique self-discharge design, as long as the high-voltage output is cut off, its own high voltage will be zero;
4. It has a double-pointer meter display for current and voltage, which is intuitive and clear;
5. Positioning mode and pressure mode can be switched with one click, which is convenient and fast;
6. There is no blind area in the test range;
7. The receiver sensitivity is adjustable, making positioning more convenient;
8. Over-current protection switch function, voltage resistance mode and positioning mode are easy to use.


 

Technical data
 

Power	220V(1±10%),50Hz(1±5%)
Output voltage	0~10kV(Square wave)
output current	max 200mA
Output capacity	2kVA
Frequency adjust	Min:0.4Hz,Max:1Hz(range adjustable)

Working principle
1. Positioning function
The AC220V mains power is fully converted through full-wave rectification, and converted into a high-power special signal required for identification. This signal is added to the cable to be located through the connecting wire, and the "step voltage method" or "current method" can be used to pinpoint cable faults.

1. Step voltage methodIf a ground fault occurs in a buried cable, we can use the potential difference method to find the fault point. The method is to add a test voltage between the test point of the faulty cable and the ground, then a distributed electric field concentric with the entry point will be formed around the entry point of the cable. There is no potential difference between any points with the same radius in this electric field, but there is a potential difference between any two points with different radii. And when the distance between the two points is fixed, the closer the two points are to the center, the stronger the potential difference.

2. Galvanic method(clamp current method)If a ground fault occurs in a tunnel cable, we can use the opposite direction of current before and after the fault point to find the fault point. The method is to add a pulsed high-voltage signal to the faulty cable to discharge the fault point. At this time, currents with opposite polarity will be generated before and after the fault point, but the current at the fault point is the smallest.

Taking advantage of this feature, we can use the receiving clamp to determine the direction of the current before and after the fault point. Clamp the receiving clamp on the cable and the receiving box will indicate a direction. If it continues to move beyond the fault point, the current polarity will be reversed, so that the grounding point can be accurately determined by moving back and forth.

2.Pressure resistance function(Withstand voltage testing)
Switch the function key to the withstand voltage function, which can output 0-10kV voltage and perform a voltage withstand test on the cable.


Packing List

Item	Name	Qty.
1	Cable sheath fault locator(main unit)	1
2	High voltage connection line	2
3	Power cable	1
4	Receiver	1
5	Fuse	2
6	Ground wire	1
7	Receiving clamp	1
8	Ground pin	2
9	Wire bag	1

Test site

 

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