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LSY-10 Three-Phase One Series Current Transformer.jpg

LSY-10 Three-Phase Current Transformer from China Suppliers - Reliable Factory Solution for Circuit Monitoring

The LSY-10 Three-Phase One Series Current Transformer is a state-of-the-art solution designed for comprehensive circuit monitoring and protection in power systems. As a leading product from a reputable factory in China, this compact device uniquely integrates phase-sequence and zero-sequence measurements into a single unit, streamlining your setup by removing the need for multiple transformers. It effectively manages phase currents ranging from 200A to 600A and a zero-sequence current of 20A, offering standard output signals of 5A or 1A. Built to withstand harsh environmental conditions, this current transformer operates reliably across a wide temperature range, making it an ideal choice for 50Hz/60Hz power systems. Trustworthy suppliers can depend on the LSY-10 for a space-saving and efficient monitoring solution that meets the demands of modern electrical infrastructures

Product Details

Product Functions

This specialized transformer is engineered to perform dual critical functions simultaneously. It measures the three-phase current sequence (200-400-600A) for accurate load monitoring, energy metering, and phase-specific overload protection in three-phase circuits. It integrates a dedicated core for detecting zero-sequence current (20A), enabling immediate identification of insulation faults, leakage currents, or ground faults. This dual functionality allows for comprehensive system oversight, balancing, and rapid fault isolation from a single installation point.

Applicable Environment

The LSY-10 is ideal for applications requiring consolidated monitoring and protection in compact spaces. It is perfectly suited for installation in motor control centers (MCCs), power distribution cabinets, compact substations, and generator protection panels across industrial plants, commercial buildings, and renewable energy systems. Its robust design, capable of operating from -35°C to +55°C, makes it reliable for both temperature-controlled indoor environments and challenging outdoor or industrial settings where space optimization is crucial.

Product Highlights

Integrated Dual-Function Design: Combines phase-sequence and zero-sequence measurement in one compact unit, saving space, simplifying installation, and improving system reliability.
High Fault Current Capacity: Rated up to 120In to prevent saturation during faults, ensuring accurate relay operation under extreme conditions.
Wide Environmental Range: Operates from -35°C to +55°C and withstands 3kV for 1 minute, ensuring stable performance in harsh climates.
Global Compatibility: Supports 50Hz/60Hz systems and 5A/1A outputs for flexible integration with international devices.
Certified Quality: Compliant with GB/T20840 standards, guaranteeing accuracy, safety, and reliability for critical infrastructure.

Frequently Asked Questions

Q What is the primary function of the LSY-10 transformer?

The LSY-10 is a dual-function current transformer that simultaneously measures three-phase current sequences (200-400-600A) for load monitoring and energy metering, while also detecting zero-sequence current (20A) to identify ground faults, insulation failures, and leakage currents — all from a single installation point.

Q What types of installations is the LSY-10 suitable for?

The LSY-10 is suitable for motor control centers (MCCs), power distribution cabinets, compact substations, and generator protection panels. It is widely used in industrial plants, commercial buildings, and renewable energy systems where space-saving and reliable protection are priorities.

Q What is the operating temperature range of the LSY-10?

The LSY-10 is designed to operate reliably across a wide temperature range of -35°C to +55°C, making it suitable for both controlled indoor environments and demanding outdoor or industrial settings.

Q Is the LSY-10 compatible with international power systems?

Yes. The LSY-10 supports both 50Hz and 60Hz power systems and offers 5A/1A secondary output options, enabling seamless integration with a wide range of international protection relays and metering devices.

Q What standard does the LSY-10 comply with?

The LSY-10 is fully compliant with GB/T20840 standards, which ensures that the product meets rigorous requirements for accuracy, electrical safety, and long-term reliability in critical power infrastructure applications.

Q How does the LSY-10 perform during high fault current conditions?

The LSY-10 is rated up to 120In, which means it is designed to resist magnetic saturation even during severe fault events. This ensures that protection relays receive accurate signals and can operate correctly under extreme short-circuit or overload conditions.