Technical Analysis of XZ-2 High-Voltage Phase Sequence Indicator for Power System Applications

The XZ-2 High-Voltage Phase Sequence Indicator represents a significant advancement in electrical testing instrumentation, designed to address the critical need for accurate phase sequence verification across multiple voltage levels in power systems. This device enables technicians to efficiently determine whether three-phase systems (A, B, C) are correctly aligned, ensuring operational safety and compliance with grid standards. With its robust technical specifications and user-centric design, the XZ-2 has emerged as an indispensable tool for high-voltage applications ranging from 50 V to 500 kV.

Key Features and Innovations

1.Multi-Voltage Compatibility
The XZ-2 supports a wide operational range, including low-voltage systems (100–380 V) and high-voltage networks (1–500 kV). By integrating attenuation components with tailored resistance values (36–1,100 MΩ) and adjustable insulation tubes, the device ensures safe and reliable measurements across diverse environments.

2.Intuitive Visual Feedback
A dual-LED indicator system simplifies phase sequence identification:

Red LED movement: Confirms positive phase sequence (A→B→C).

Green LED movement: Indicates reverse phase sequence (C→B→A).

3.Energy-Efficient Design
An integrated auto-power management system activates the device during use and shuts it down after idle periods, extending battery life (9 V DC) while reducing maintenance demands.

4.Ergonomic and Portable
Compact dimensions (140 × 82 × 40 mm) and lightweight construction (0.3 kg) enhance field portability. The insulated telescopic rod system—adjustable from 2.0 m (6 kV) to 5.0 m (500 kV)—provides safe physical clearance during high-voltage testing.

Technical Specifications

Additional Parameters

Input Voltage Range: 50 V–10 kV (direct); 1–10 kV (with insulation tube)

Operating Temperature: -20°C to +50°C

Storage: Aluminum case (750 × 150 × 150 mm, 2 kg) for shock resistance and environmental protection.

Applications in Power Systems

1.Grid Maintenance
Verifies phase sequence alignment during transformer commissioning, feeder reconfiguration, or parallel generator synchronization to prevent equipment damage from phase mismatches.

2.High-Voltage Substations
Enables safe testing of 35–500 kV transmission lines using extendable insulated rods, complying with IEC 61477 live-working standards.

3.Renewable Energy Integration
Ensures correct phase rotation in solar/wind farm inverters to maintain grid stability during renewable energy integration.

Advantages Over Conventional Methods

Safety Enhancement: Composite insulation materials and calibrated attenuation resistors minimize leakage current risks at ultra-high voltages.

Operational Efficiency: Clear LED indicators eliminate ambiguity in phase identification, reducing diagnostic time by ~40% compared to oscilloscope-based methods.

Scalability: Customizable configurations (e.g., extended rod lengths or resistance values) support bespoke voltage requirements.

The XZ-2 High-Voltage Phase Sequence Indicator redefines reliability in phase sequence verification through its adaptive design and precision engineering. By merging safety, portability, and multi-voltage adaptability, it addresses critical challenges in modern power systems—from legacy grid upgrades to smart grid deployments. Technicians and engineers will find this instrument indispensable for ensuring operational integrity in increasingly complex electrical networks.

GDZX is a manufacturer of power testing equipment, offering a wide range of product categories with comprehensive models and providing professional technical support. Contact: +86-17396104357.Website: https://www.highvoltage-testequipment.com/