LZZW-20/24 Outdoor Single-Phase Epoxy Resin Current Transformer

LZZW-20/24 Outdoor Single-Phase Epoxy Resin Current Transformer

Compact 24kV outdoor epoxy CT for dry-type metering and protection

  • Dedicated 24kV outdoor epoxy cast-resin CT platform
  • Oil-free dry-type insulation for outdoor distribution systems
  • 24/65/125kV insulation level with 5A or 1A secondary output
  • Supports 0.2S / 0.2 / 0.5 metering and 5P protection classes
  • Front terminal box for accessible secondary wiring and inspection
  • Approx. 39kg compact structure for outdoor brackets and compact substations

Overview

The LZZW-20 and LZZW-24 are outdoor single-phase epoxy resin cast current transformers for 20kV and 24kV AC power systems (50/60Hz). These transformers provide precise current measurement for metering and protective relays, ensuring reliable operation of power systems. The cast-resin design offers safe, fully enclosed operation without leakage or fire hazards, suitable for harsh outdoor conditions.

Applications include power system monitoring, over-current, over-voltage, overload, and single-phase grounding protection.

LZZW 20 24 Current Transformer display

Key Features

  • IEC 61869-1, IEC 61869-2 compliant
  • High-quality epoxy resin insulation, low partial discharge, high accuracy
  • Anti-pollution and moisture resistant, suitable for outdoor use
  • Seismic and mechanical shock resistant
  • Compact pillar-type structure, easy installation
  • Optional multi-ratio secondary windings
  • Wide operating temperature: -45°C ~ +45°C

Technical Data

Rated

Primary

Current (A)

 Accuracy

Class

 Rated

Output (VA)

 Short-Time

Thermal

Current (kA/1s)

 Rated

Dynamic

Current (kA)
10–200 0.2/0.5/10P10 10/15/15 150 375
300–500 0.2/0.5/10P 15 40 100
600–1000 0.2/0.5/10P 15/20/20 80 200
1000–2000 0.2/0.5/10P 30/30/50 100 250

Installation Safety

  • Install with grounding bolts and four mounting holes
  • Outdoor operation with no leakage, no pressure, no fire risk
  • Supports ambient temperatures -45°C ~ +45°C
  • Anti-fouling and anti-fogging design suitable for tropical or polluted environments
  • Compliance with high-voltage outdoor insulation and safety standards

Model Explanation

  • LZZW-20 / LZZW-24 – Series name
  • Pillar-type – Structure
  • Epoxy Resin Cast – Insulation technology
  • Outdoor – Intended use
  • Rated voltage: 20kV / 24kV

Applications

  • Power Substations – Accurate current measurement for protective relays
  • Renewable Energy Systems – Monitoring and protection in solar/wind installations
  • Industrial Facilities – Overload and short-circuit monitoring
  • Energy Metering – Precise metering for billing and consumption monitoring

FAQs

  • Q: Can LZZW-20 / LZZW-24 be installed in outdoor harsh environments?
    A: Yes, the epoxy resin and silicone rubber sheds protect against moisture, UV, and pollution.
  • Q: What is the rated secondary current?
    A: Standard 5A, 1A available upon request.
  • Q: Are these transformers maintenance-free?
    A: Yes, no intermediate maintenance is required. Regular surface cleaning is sufficient.
  • Q: What standards do they comply with?
    A: IEC 61869-1, IEC 61869-2, GB20840.2-2014