OWTS Oscillating Wave Partial Discharge Test System for 6-35kV Power Cable Insulation Diagnosis | XHOW560

The XHOW560 Series is an integrated Oscillating Wave Test System (OWTS) engineered for partial discharge (PD) detection, location and insulation diagnosis on 6–35 kV medium-voltage power cables. By applying a damped AC oscillating voltage that reproduces real cable operating conditions, the system excites partial discharge inside hidden insulation defects and then measures both PD intensity and fault position—converting an invisible insulation risk into a measurable, actionable data point before a cable fails.

Instead of only finding a fault after an outage, the XHOW560 helps operators build a condition-based maintenance strategy: detect weak insulation early, locate the defect precisely, and compare repeated test results over time to decide whether a cable can stay in service, be monitored, or must be replaced.

The XHOW560 does not energize the cable with a fixed-voltage surge. It reproduces the cable’s real operating stress using a damped AC oscillating wave, then listens for the discharge signature of an insulation defect. The test cycle is straightforward:

1. Series connection & charging: a hollow inductor is connected in series with the cable under test, and a high-voltage DC source charges the series circuit to a preset voltage.
2. Oscillation generation: when the charging voltage reaches the set point, a high-speed electronic switch closes across the supply, forming a damped oscillating circuit that produces a decaying AC voltage at 20Hz-850Hz—close to the cable’s real service condition.
3. Partial discharge excitation: the oscillating voltage stresses insulation defects and triggers partial discharge inside the cable, which the coupling capacitor and PD sensor capture.
4. Precise location: the built-in software uses the pulse reflection method to calculate the defect position, giving ±0.1m positioning accuracy and a positioning error of only 1% of cable length.
5. Trending & reporting: results are stored in the database, compared against previous tests automatically, and exported as a one-click test report for asset decision-making.

• High-voltage output unit with high-voltage divider and high-voltage switch
• Partial discharge coupling capacitor and coupling unit
• Partial discharge sensor for on-line PD signal capture

• Laptop-based control of the full test procedure, data storage and data analysis
• External high-voltage control switch for safe HV output management
• Built-in OWTS software: create/edit projects, database management, calibration test (cable length and apparent discharge quantity), voltage withstand test, data browsing and in-depth analysis, and automatic report generation
• Laser control technology, high-voltage semiconductor switches, DSP-based digital filtering, and wireless connection / protocol conversion for stable signal acquisition

• Integrated PD detection and location in a single portable system, covering 6–35 kV MV/LV power cables
• Damped AC oscillating voltage reproduces real service stress, so hidden defects are excited rather than missed
• ±0.1pC measurement accuracy on a 10pC-200nC range for early, low-level PD detection
• Pulse-reflection positioning with ±0.1m accuracy and 1% cable-length error for fast field location
• Automated trend management turns each test into comparable historical data for condition-based maintenance
• One-click report generation simplifies documentation for engineering acceptance and asset records
• Customizable output voltage up to ±75kV to match different cable classes and voltage networks

XZH TEST specializes in cable fault detection and electrical testing equipment, providing practical solutions for power utilities, electrical contractors, testing companies and field engineers. Products are usually shipped by international express such as FEDEX, DHL, TNT and ARAMEX; shipping terms can be negotiated by country.

XZH TEST welcomes your inquiry—contact us for OEM options, technical datasheets and a tailored quotation.