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High Voltage DC Power Supply 200W 400W with Over Current Protection

Name: High Voltage DC Power Supply 200W 400W with Over Current Protection
Brand: Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
SKU: XHHV Series
Price: 15000 USD
Availability: InStock

Product Details:

Place of Origin:	China
Brand Name:	XZH TEST
Certification:	CE/ISO
Model Number:	XHHV Series

Detail Information

Place of Origin:

China

Brand Name:

XZH TEST

Certification:

CE/ISO

Model Number:

XHHV Series

Highlight:

High Light

Highlight:

320mA DC Burn-Through Current

Full Short-Circuit Immune Design

Zero-Cross Auto Self-Discharge

Trading Information

Minimum Order Quantity:

1 Unit

Price:

Negotiable

Packaging Details:

wooden packaging

Delivery Time:

5-8 work days

Payment Terms:

T/T

Supply Ability:

3000unit/year

Product Description

Target Application: Cable fault burn-through and insulation conditioning specialists tackling high-resistance and moisture-ingress faults — emphasizing 320mA burn-through current, full short-circuit immunity, and zero-cross self-discharge for safe operation on water-damaged and aging cable infrastructure.

XHHV508 Series DC High Voltage Power Supply — 200W / 400W

The XHHV508 series DC high voltage power supply fully complies with DL/T846 and DL/T474 standards for high voltage test equipment and on-site insulation testing. Designed for 35kV and below voltage-class cable fault testing — including DC withstand voltage, impulse discharge, and fault point burn-through — this instrument completely replaces traditional test transformer and control box systems that weigh over 70 kg combined.

Built with high-precision, high-stability specialized HV electronic components and high-frequency high-voltage technology, the XHHV508 features a simple, lightweight construction. Its unique short-circuit immune design allows the HV output to operate safely even when directly shorted to ground. As China's lightest portable DC impulse high-voltage equipment with flexible power configuration, it is the ideal instrument for power cable fault detection.

XHHV508-4

Key Features

DC Withstand Voltage and Burn-Through: Dual-mode operation supporting DC withstand testing for cable insulation verification and DC burn-through for converting high-resistance faults to locatable faults at up to 320mA.

External Capacitor Interface: Supports 1-16 F external capacitor banks for impulse discharge testing, with the voltmeter continuously monitoring capacitor voltage even in standby mode.

Short-Circuit Immune: High-frequency topology inherently survives direct HV-to-ground shorts — eliminates external ballast protection and survives accidental discharge faults without damage.

Zero-Start Protection: HV output cannot be initiated unless voltage adjustment is at zero; yellow zero-start indicator confirms safe state before each test cycle.

Automatic Self-Discharge: Internal bleed circuit dissipates residual voltage upon HV output stop — voltmeter returns to zero confirming safe state without requiring immediate manual discharge.

Dual 1.5-Grade Pointer Meters: Analog HV voltmeter and LV ammeter provide real-time visual indication of discharge dynamics, arc establishment, and residual voltage.

Comprehensive Protection: Over-current (12A, >8S), over-voltage, and over-temperature (65 C) automatic protection with manual reset — built for continuous field operation from -25 C to +65 C.

Technical Specifications

Output Voltage	0–35kVDC (Default 0–32kVDC)
Voltage Accuracy	1.5 Grade
Output Polarity	Negative
External Capacitor	1–2/4/8/16 μF
Burn-Through Voltage	0–32kVDC
Burn-Through Current	320mA
Over-Temperature Protection	65℃
Over-Current Protection	12A (>8S, Low-Voltage Side)
Dimensions	455 × 360 × 360 mm
Weight	≤ 20 kg
Power Supply	AC 220V±10%, 50Hz±1Hz
Operating Temperature	-25℃ ~ +65℃

Frequently Asked Questions

Q1: How does DC burn-through convert high-resistance faults into locatable faults?

High-resistance cable faults — typically caused by moisture ingress, carbonized tracking, or degraded insulation — resist standard impulse methods because fault impedance is too high to sustain an arc. The XHHV508's 320mA DC burn-through applies sustained DC current (up to 32kV) directly to the fault, progressively carbonizing and drying the fault path. This converts high-resistance faults into low-resistance metallic shorts that can then be precisely located using acoustic, magnetic, or step-voltage pin-pointing. The current meter provides real-time feedback — a sustained current increase indicates successful conditioning.

Q2: What does short-circuit immune design mean for field operations?

Short-circuit immunity means the HV output operates safely even when connected directly to ground — a condition that would destroy conventional transformer-based test sets. This is essential in three scenarios: (1) During burn-through of water-ingressed faults, impedance may suddenly collapse as water vaporizes; (2) When testing cables with unknown fault characteristics; (3) During impulse discharge where sphere gap closure creates a momentary short. The XHHV508's high-frequency topology inherently limits output current during short circuits without external protection devices.

Q3: How does the self-discharge mechanism improve field safety and workflow?

Traditional HV DC supplies require manual discharge using a discharge rod after each test — an operator-dependent procedure with safety risks if forgotten. The XHHV508's automatic self-discharge circuit activates when HV output stops: internal bleed resistors safely dissipate residual voltage to zero within seconds, confirmed by the voltmeter. The operator still uses the discharge rod as final verification, but the self-discharge circuit ensures stored energy is already dissipated even if the manual step is skipped. This is particularly valuable in burn-through operations with multiple charge/discharge cycles.

Q4: What types of cable faults benefit most from burn-through conditioning?

DC burn-through conditioning is preferred for: (1) Water-tree degraded XLPE and PILC cables where moisture creates high-resistance tracking paths; (2) Oil-filled cable joints with intermittent high-impedance faults; (3) Aged PILC cables with gradual insulation breakdown in the kilo-ohm to mega-ohm range; (4) Direct-buried cables where soil moisture creates electrolytic fault paths. In all cases, the sustained 320mA DC current provides thermal energy to permanently modify the fault path impedance.

Q5: What operating procedure ensures effective and safe burn-through?

Recommended procedure: (1) Verify ground resistance <5 Ohm and connect all safety grounds; (2) Press over-current protection switch (must be pressed); (3) Confirm zero-start indicator is illuminated (yellow); (4) Press start and slowly increase voltage while monitoring current — rising current indicates conditioning; (5) If current plateaus, increase voltage in 5kV increments to 32kV max; (6) When current shows sudden jump or sustained flow, fault is conditioned — reduce voltage to zero and press stop; (7) Wait for self-discharge (voltmeter at zero), then verify with discharge rod; (8) If over-current triggers, power-cycle before resetting.

Ratings & Review

Overall Rating

5.0

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

4 stars

3 stars

2 stars

1 stars

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التوقيع：أحمد مصطفى

Egypt Jun 17.2026

Helpful (8)

جهاز اختبار الكابلات XHHV535‑4TS أداؤه ممتاز لفريق الصيانة الحكومي لدينا. استخدمناه لفحص عطل كابلات أرضية في محطة محولات شبرا الخيمة بالقاهرة. يعمل بدقة عالية حتى في درجات الحرارة المرتفعة، جهاز متان للعمل الميداني، يوفر لنا الكثير من وقت الإصلاح. نوصي به بشدة لفرق الكهرباء.

John Miller

United States Mar 26.2026

Helpful (3)

We tested the XHHV535-4Z on several underground cable repair jobs in Houston. It helped our team locate faults faster and reduced unnecessary excavation. The equipment is powerful, stable, and easy to operate in the field. A great solution for utility and industrial cable maintenance.

Lee

Malaysia Jan 10.2024

Helpful (5)

Our customized service is incredibly thoughtful: our R&D team can accurately address specific needs, providing tailored solutions for everything from voltage and frequency to environmental adaptation. They quickly provided a perfect solution for the non-standard requirements of our project, truly delivering a bespoke service.

Tags:

Cable fault detection |864J 12kV High Voltage Surge Generator Portable Underground Cable Fault Locator Pulse Tester | XHHV512-12L

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High Voltage DC Power Supply 200W 400W with Over Current Protection

High Light

Highlight:

320mA DC Burn-Through Current

Full Short-Circuit Immune Design

Zero-Cross Auto Self-Discharge

Overall Rating

Rating Snapshot

All Reviews

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