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38 kV Metal-Clad Switchgear

High-performance switchgear for 34.5 kV systems.

Wafr 38 kV Metal-Clad Switchgear provides reliable power distribution, protection and control for 34.5 kV systems.

The equipment combines drawout vacuum circuit breakers, insulated copper bus, grounded metal compartmentalization, numerical protection and advanced automation in a robust metal-clad construction.

It is suited to utility substations, mining facilities, large industrial plants, renewable generation, battery-energy-storage projects, data centres and other high-demand facilities.

Key Ratings

ParameterStandard Ratings
Equipment class38 kV
Typical system voltage34.5 kV
Frequency60 Hz
Phases3
Main bus630 / 1200 / 2000 / 3000 A
Higher bus ratingAvailable where specified
Breaker continuous current630 / 1200 / 2000 / 3000 A
Short-circuit rating25 / 31.5 / 40 kA
Basic Impulse Level150 kV typical
Circuit breakerDrawout vacuum
Bus conductorCopper
Ground busContinuous copper
Control voltage125 Vdc typical
IndoorAvailable
OutdoorAvailable
Arc-resistantAvailable

Available Configurations

Main and Tie Arrangements

Main breaker, main-tie-main, bus sectionalizing, double-ended substations

Feeder and Transformer

Feeder distribution and transformer primary switchgear

Incoming

Utility incoming, generator incoming and utility interconnection

Renewable and BESS

Renewable and BESS collector systems

Arc-Resistant

Certified and tested to IEEE C37.20.7

Product Composition

Each lineup provides compartmentalization between:

  • Circuit breaker
  • Main bus
  • Cable compartment
  • Instrument transformers
  • Control equipment
  • Protective relays
  • Metering equipment

Insulated copper bus and a continuous copper grounding system provide robust electrical performance.

Product Features

Available Configurations

  • Main breaker
  • Main-tie-main
  • Feeder distribution
  • Transformer primary switchgear
  • Utility incoming
  • Generator incoming
  • Bus sectionalizing
  • Double-ended substations
  • Renewable collector systems
  • BESS collector systems
  • Utility interconnection

Arc-Resistant Design

Arc-resistant versions are certified and tested in accordance with IEEE C37.20.7. Available features include:

  • Reinforced construction
  • Pressure-relief system
  • Arc exhaust plenum
  • Remote breaker racking
  • Remote breaker operation
  • Arc-flash optical detection
  • High-speed bus protection

Intelligent Protection

  • 50/51 Phase Overcurrent
  • 50N/51N Ground Overcurrent
  • 27/59 Voltage Protection
  • 81 Frequency Protection
  • 87 Differential Protection
  • 67 Directional Overcurrent
  • 50BF Breaker Failure
  • 25 Synchronism Check
  • 46 Negative Sequence
  • 49 Thermal Protection

Standards & Certification

  • CSA C22.2 No. 31 — Switchgear Assemblies
  • IEEE C37.20.2-2025 — Metal-Clad Switchgear
  • IEEE C37.20.7-2024 — Internal Arcing Fault Testing
  • IEEE C37.04 — High-Voltage Circuit Breakers
  • IEEE C37.09 — Circuit Breaker Test Procedures
  • IEEE C37.20.6 — Ground and Test Devices
  • CSA C22.1 — Canadian Electrical Code, Part I

Applications

  • 34.5 kV utility distribution
  • Mining operations
  • Renewable generation
  • Solar farms
  • Wind generation
  • Battery energy storage
  • Large data centres
  • Industrial substations
  • Oil & gas facilities
  • Independent power producers
  • Generation facilities

Key Features

  • Drawout vacuum circuit breakers
  • Insulated copper bus
  • Grounded metal compartmentalization
  • Numerical protection and advanced automation
  • Arc-resistant versions to IEEE C37.20.7
  • Indoor and outdoor configurations
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