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LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
  • LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5
LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5

LMHK-612 (60×120 mm Window) Clamp / Split-Core Current Transformer • 4000/5A • Accuracy Class 0.5

GH₵1,400.00 GH₵1,650.00

Product Description

Overview

The LMHK-612 4000/5A Accuracy Class 0.5 is a high-capacity split-core current transformer, designed for accurate measurement of up to 4000 Amps AC in systems where large conductors or busbars are present. The 60×120 mm window makes it suitable for thick conductors or grouped busbars without requiring disconnection. Accuracy Class 0.5 ensures ±0.5% maximum error under rated conditions—ideal for precision monitoring, energy metering, or power quality tasks.

Key Features

  • Primary Current Rating: 4000 A AC

  • Secondary Current Rating: 5 A AC — gives a 4000:5 ratio

  • Accuracy Class: 0.5 (±0.5%) under rated burden

  • Window / Aperture Size: Approx. 60 × 120 mm — large opening for busbars or large conductors

  • Design: Split-core / clamp-on, allowing retrofit installation or installation without breaking primary conductors

  • Frequency Range: Typically 50 / 60 Hz (HK series) 

  • Housing & Material: Flame-retardant plastics, epoxy / PBT internals (based on similar Heyi products) with good insulation and mechanical protection 

Additional Specifications (Typical / Expected)

Specification Value / Typical
Burden (VA) ~ 15-30 VA typical for 4000/5A in Class 0.5 HK / HK-812 style CTs
Measuring Range Often from ~10% of rated primary up to ~120% without large error (HK-series support) 
Dielectric / Insulation Good insulation; likely a dielectric test voltage of ~2.5 kV / 1 minute in many HK-models 
Operating Temperature Typically −25 °C to +75 °C (ambient) in Heyi HK models 
Phase Angle Error Usually small, ≤ ±30 minutes under rated conditions in HK series CTs 

Use-Case / Applications

  • Industrial switchgear, distribution boards with large busbars drawing high current

  • Power monitoring & metering for large loads (motors, transformer feeders)

  • Energy management systems, power quality analysis, and protection instrumentation

  • Retrofitting mature systems where shutting off or disconnecting primary conductors is problematic

Installation & Safety Notes

  • Ensure that the conductor(s) to pass through the 60×120 mm window fit cleanly, without bending insulation or causing strain

  • Always terminate the secondary circuit to a measurement device or burden; never leave the secondary open with the primary energized — open secondary can lead to dangerously high voltages

  • Secure the clamp fully, ensure mechanical stability, avoid vibration or movement that could shift its position (which can affect accuracy)

  • Install in environment adhering to temperature, humidity, and electromagnetic standards of the spec sheet

  • Follow local electrical safety codes, ensure sufficient insulation, proper wiring, etc.

Benefits

  • Precise measurement with ±0.5% accuracy — good for billing and quality monitoring

  • Large aperture size allows use with large conductors or busbars without disruptive rewiring

  • Clamp/on split-core design simplifies installation and maintenance

  • Robust design suited for industrial environments

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