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High-Sensitivity Cable Sheath Fault Locator with Galvanometer Balance Bridge 10kV Output for Precise Fault Detection

Name: High-Sensitivity Cable Sheath Fault Locator with Galvanometer Balance Bridge 10kV Output for Precise Fault Detection
Brand: Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
SKU: XHHG521B+XHHD523L
Price: 15500 USD
Availability: InStock

Product Details:

Place of Origin:	China
Brand Name:	XZH TEST
Certification:	CE/ISO
Model Number:	XHHG521B+XHHD523L

Detail Information

Place of Origin:

China

Brand Name:

XZH TEST

Certification:

CE/ISO

Model Number:

XHHG521B+XHHD523L

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Galvanometer Balance Bridge Detection

10kV High-Sensitivity Fault Locator

Zero Blind Area Cable Testing

Trading Information

Minimum Order Quantity:

1 unit

Packaging Details:

wooden packaging

Delivery Time:

5-8 work days

Payment Terms:

T/T

Supply Ability:

2000 units per year

Product Description

XHHG521B — Galvanometer Balance Bridge System

The XHHG521B is a precision cable sheath fault detection unit based on the MURRAY bridge principle. Equipped with a high-sensitivity amplifier and galvanometer balance indication system, it delivers exceptional accuracy for locating high-resistance breakdown points in power cables.

Key features include 5000V no-load voltage with 100mA short-circuit current capacity, a special double-core high-voltage rubber cable with four-terminal resistance measurement to eliminate lead errors, and an integrated 12806 display with automatic cable length calculation. The galvanometer balance method eliminates blind zones entirely, making it ideal for short cables and faults near cable ends.

MURRAY bridge principle with galvanometer balance for ±(0.1%·L±1)m positioning accuracy
5000V no-load voltage with 100mA short-circuit current for challenging high-resistance faults
High-sensitivity amplifier with galvanometer indication for precise balance point detection
Four-terminal resistance measurement eliminates lead and contact resistance errors
Integrated automatic fault distance calculation via cable length input
Zero blind area — effective for short cables and near-end breakdowns

XHHD523L — High-Voltage Cable Sheath Fault Pinpoint Locator

The XHHD523L is a professional-grade high-voltage output unit designed for fast and accurate pinpoint location of cable sheath faults. With 0~10kV adjustable square wave output and up to 200mA output current at 2kVA capacity, it fully complies with GB50150-2006 standards for cable outer sheath testing.

It features a wide frequency adjustment range from 0.2Hz to 5Hz, one-button switching between pin-pointing and withstand voltage testing modes, and zero protection for safe operation. The receiver sensitivity is fully adjustable to optimize signal detection across varying field conditions and cable burial depths.

0~10kV adjustable output voltage for versatile testing across all cable voltage levels
0~200mA output current at 2kVA capacity for demanding fault scenarios
Frequency adjustable from 0.2Hz to 5Hz for optimal signal penetration
One-button toggle between pin-pointing mode and DC withstand voltage testing
Fully adjustable receiver sensitivity for diverse field conditions
Integrated zero protection and over-current safeguards

Combined System Technical Specifications

Parameter	Specification
Model	XHHG521B + XHHD523L
Input Voltage	AC 220V (±10%), 50Hz (±2Hz)
Output Voltage	0~10kV (Adjustable)
Output Current	0~200mA
Output Capacity	2kVA
Frequency Adjustment	0.2Hz ~ 5Hz
Positioning Accuracy	±(0.1%·L±1) m
Dimensions (L×W×H)	540 × 310 × 460 mm
Weight	35 kg
Battery Backup	9V Batteries (Built-in)

Key Applications

Detection of high-resistance breakdown points in laid cables, especially linear high-resistance faults at cable intermediate joints
Identification of flashover-type breakdown points with stable current maintenance via constant current source
Detection of low-resistance insulation defects that have not yet broken down under operating voltage
Suitable for 10kV-500kV single-core and three-core high-voltage and ultra-high voltage cable outer sheath testing

Frequently Asked Questions

Q1: What are the differences between XHHG521B and XHHD523L?

The XHHG521B is the precision balance bridge unit that uses the MURRAY bridge principle with galvanometer indication for high-accuracy fault distance measurement (±0.1%·L±1m). The XHHD523L is the high-voltage output and pinpoint location unit that provides 0~10kV adjustable output with 0.2~5Hz frequency control for field-based fault pinpointing and DC withstand voltage testing. Together they form a complete cable sheath fault detection system.

Q2: What makes the galvanometer balance bridge method superior?

The galvanometer balance bridge provides extremely high sensitivity for detecting high-resistance breakdown points that other methods struggle with. It has zero blind zones — unlike wave reflection methods that fail on short cables and near cable ends. The four-terminal measurement eliminates lead resistance errors, and the automatic calculation via the 12806 display significantly reduces testing time.

Q3: What types of cable faults can this combined system detect?

The system handles three primary fault types: (1) high-resistance breakdown points at cable intermediate joints; (2) flashover-type breakdowns where the constant current source maintains stable arc conditions; and (3) low-resistance insulation defects detected by megohmmeter that have not yet fully broken down, enabling preventive maintenance.

Q4: Can this system perform both pin-pointing and withstand voltage testing?

Yes. The XHHD523L unit includes a one-button toggle between pin-pointing mode (using square wave step voltage method for precise fault location) and DC withstand voltage testing mode (performing 5kV-10kV 1-minute tests per GB50150-2006 standards). This eliminates the need for two separate instruments.

About XZH TEST

XZH TEST is a professional manufacturer specializing in cable fault detection and diagnostic solutions for power utilities, electrical contractors, and industrial customers worldwide. With advanced technologies including MURRAY bridge analysis, galvanometer balance bridge systems, TDR, and intelligent fault location systems, XZH TEST delivers reliable equipment for faster cable fault location and improved network reliability.

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High-Sensitivity Cable Sheath Fault Locator with Galvanometer Balance Bridge 10kV Output for Precise Fault Detection

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10kV High-Sensitivity Fault Locator

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