LMZ Current Transformer – 150/5A, 0.5s Class, Protection & Metering

The MINGTUO LMZ Current Transformer (CT) is engineered for precise current measurement and reliable circuit protection in medium-voltage electrical systems. Constructed using advanced vacuum epoxy casting technology and fire-resistant composite materials, this robust CT delivers stable, high-accuracy performance in demanding industrial and utility applications. Its compact and durable design ensures long-term operation even under challenging environmental conditions.

Key Specifications

Ratio Range: 5–4000/1A, 5–4000/5A

Accuracy Class: 0.2, 0.2S, 0.5, 0.5S, 1.0, 5P, 10P

Rated Burden: 2.5–30VA

Frequency: 50/60Hz

Insulation Level: 0.66kV–35kV

Technical Features

Enhanced Protection: Vacuum epoxy casting provides full moisture resistance

Flame Retardancy: Housing rated UL94-V0 for maximum safety

Efficiency Optimization: Design minimizes hysteresis and core losses

High Stability: Reliable operation from -40°C to +70°C

Compact Footprint: Small size suitable for space-limited installations

Flexible Mounting: Options include DIN rail, panel, or through-type mounting

Primary Applications

Electricity metering and energy management systems

Power distribution network monitoring

Relay protection circuits

Industrial automation control

Renewable energy generation monitoring

Performance & Quality Assurance

Manufactured according to IEC 60044-1, IEEE C57.13, and GB 1208 standards, each LMZ CT undergoes rigorous testing, including:

Verification of ratio and phase angle accuracy

Dielectric strength testing

Assessment of temperature rise

Burden capability checks

Service Support

Custom ratios and specifications tailored to customer requirements

Assistance with global certification compliance

Comprehensive 24-month warranty

Multilingual technical documentation

OEM/ODM services available

Quick Details

Current Transformer (CT)

Instrument and Electrical Current Transformer

Epoxy Cast / Resin Insulated / Wound Type

Metering and Protection CT

Energy Measurement & Power Monitoring

Relay Protection CT

100/5A, 0.5 Class Accuracy

5P10 Protection Transformer

Current Sensor / Transducer / Ratio Transformer

Core Functions & Purpose

LMZ Current Transformers serve two fundamental roles in electrical systems:

1. Accurate Current Measurement: Safely reduce high primary currents to standard secondary levels for monitoring, billing, and energy management.
2. Reliable Protection: Supply precise current information to protection devices such as relays, ensuring safe operation and circuit isolation.

Application Areas

Energy Measurement & Metering

Commercial and industrial electricity billing systems

Power quality monitoring and analysis

Advanced energy management systems

Smart grid and utility revenue metering installations

Protection & Control Systems

Overcurrent and earth fault protection schemes

Differential protection for transformers and generators

Motor protection circuits

Relay protection in switchgear and distribution panels

Advanced grid automation systems

Monitoring & Industrial Automation

Monitoring power distribution networks

Industrial process control and building management systems

Data center power monitoring infrastructure

Renewable energy generation systems

Specialized Applications

Harmonic measurement and detailed electrical analysis

Temporary setups for load assessment

Retrofit and critical system upgrades

Reliable operation in hazardous or explosion-proof environments

Key Benefits

Precise, high-accuracy measurement of high currents

Dependable data for billing and industrial control systems

Robust protection for equipment and personnel safety

Compliance with strict international standards

Seamless integration with both analog and digital architectures

LMZ Current Transformers provide unmatched accuracy, reliability, and safety, making them essential components in modern electrical infrastructure—from generation and transmission to distribution and end-use metering.