High-voltage Cable Outer Sheath Fault Locating Device

The High-Voltage Cable Outer Sheath Fault Tester is a high-voltage cable outer sheath testing system developed by our company in response to the development trend of high-voltage and ultra-high-voltage transmission in the current power system, where single-core cables experience multiple ground faults in their outer sheaths. Due to the typical use of single-core cables (voltage levels of 35KV to 500KV) in ultra-high-voltage transmission lines, the metallic shielding is usually grounded at one end or in segmented cross-connection, which can lead to significant circulating currents if the outer sheath is damaged, causing harm to the cable's main insulation. In accordance with the unique grounding method of ultra-high-voltage cable sheaths, this testing system is equipped with a bridge measurement section and a step voltage pinpointing section. By effectively combining these, it can perform tests on the grounding or leakage current of ultra-high-voltage single-core cable outer sheaths, as well as significant hidden dangers and main insulation faults in high-voltage cables. The equipment has no blind spots during testing, making it highly effective in locating leakage tracking faults on short cables and cable joints, and the entire system meets the requirements for high-voltage cable outer sheath fault testing.

First Technical Indicator:

High-Voltage Bridge Tester Technical Specifications

◆ Test Voltage: 0~15kV, Negative High Voltage, Continuously Adjustable   ◆ High Current: 30mA

◆Test Proportion Accuracy: ±(0.2%·L±1) meters        ◆Operating Power: AC220V±10%

◆ Interference Resistance: >100VAC                      ◆ Weight: ≤12kg

◆Dimensions: L478mm × W360mm × H316mm

Part Two: Technical Specifications:

◆ Integrated Pipeline Tester Technical Specifications

Transmitter Technical Specifications

◆ Injection Method: 480Hz, 7.7KHz, 31KHz, and 61KHz ◆ Induction Method: 31KHz, 61KHz

◆ Clamping Method: 31KHz ◆ Fault Detection:

◆ Output Voltage: 0-400Vp-p, varying according to insulation conditions ◆ Output Waveform: Sine Wave

◆ Power: 11.1VDC 4.4Ah Lithium Battery   ◆ High Output Power: 10W

Receiver Technical Specifications

◆ Power Consumption: <1.0W ◆ Power Source: 11.1VDC, 1.8AH Lithium-ion Battery ◆ Insulation Fault Detection: Not less than 2MΩ

◆ Depth of Test Line Burial: 5 meters (under normal conditions) ◆ Routing Error of Test Line: ≤5 cm

◆ Test Line Burial Error: ±0.05h ±5cm (h represents the burial depth of the pipeline)

◆ Effective Length Testing of Pipeline Route and Burial Depth by Injection Method: Not Less Than 20Km (Under Normal Conditions)

◆ Effective Length of Line Route and Burial Depth Testing by Inductive Method: Not Less Than 5Km (Under Normal Conditions)

◆ Effective testing of line routing and burial depth using clamping method: Not less than 10Km (under normal conditions)