Product Description

Overview

The LMCK-50 1200/5A Accuracy Class 0.5 is a high-capacity, high-precision clamp-on (split-core) current transformer designed for AC systems where precise metering is required. With a primary current rating of 1200 A and a standard secondary output of 5 A, and with an error tolerance of ±0.5% under rated conditions, this CT is suitable for demanding industrial, commercial, or power monitoring applications. Its 50 mm inner aperture allows accommodation of large conductors or busbars.

Key Features

• Model / Series: LMCK-50 – from Zhikai’s LMCK line. 

• Primary Current Rating: 1200 A AC 

• Secondary Current Rating: 5 A AC 

• Accuracy Class: 0.5 (±0.5%) – suitable for precise metering or billing-level monitoring.

• Aperture/Window (Inner Hole) Size: ~ 50 mm – for large cables or busbars. 

• Type: Split-core clamp-on design, allowing installation without disconnecting primary conductor.

• Housing / Material: Flame-retardant plastic, moisture resistant, durable and stable with minimal maintenance. 

Technical Specifications

Applications

• High-current load monitoring in switchgear, industrial panels and distribution boards

• Precise energy metering, power quality measurement, billing or audit grade monitoring

• Retrofitting in existing installations without shutting off service or disconnecting conductors

• Integration with power analyzers, industrial controllers, SCADA/BMS systems

Installation & Safety Guidelines

• Ensure the conductor (cable or busbar) fits cleanly through the ~50 mm aperture without damaging insulation

• Always connect the secondary side to a burden (meter or resistor); do not leave the secondary open when the primary is energized – this is critical for safety and to avoid excessive voltage buildup

• Secure the clamp fully; mechanical stability is important for consistent readings

• Avoid exposing the CT to temperatures, moisture or electromagnetic interference beyond its rated limits

• Follow all applicable electrical codes and safety standards in your jurisdiction

Benefits

• High precision (0.5% accuracy) gives confidence in metering / billing and measurement tasks

• The large aperture and high primary current capacity handle demanding installations

• Clamp-on design eases installation and maintenance; no need to break primary conductors

• Durable, low-maintenance construction – cost savings over time