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Current Limiting Resistors

Overview

Current Limiting Resistors (CLRs) limit current to a predetermined value, protecting electrical equipment from excessive fault or inrush currents. They are used to maintain current within specified limits during switching, starting, testing, and other power system operations.

SupplyQRLoad
Q
Circuit breaker
R
Current limiting resistor
  • Stainless-steel grid resistor elements
  • Hot-dip galvanized steel enclosure as standard; stainless-steel enclosure available upon request
  • High thermal capacity for converting electrical energy into heat during high-current events
  • Rugged, impact-resistant construction
  • Suitable for high-altitude installations
  • Corrosion-resistant stainless-steel nameplate
  • Designed for hazardous and harsh environments
  • Designed and tested in accordance with applicable IEC and IEEE standards
Hilkar open-frame current limiting resistor with three stacked grid-element tiers and copper busbars
  • High-power test laboratories
  • Motor starting
  • Electric arc furnaces (EAFs)
  • Induction furnaces
Hilkar current limiting resistor in perforated steel enclosure with nameplate, warning label and terminal boxes at both ends
  • System Voltage (kV)
  • Current Rating (A)
  • Resistance Value (ohm)
  • Maximum ON Time (s) and Duty Cycle
  • Application Type
  • Installation Type (Indoor / Outdoor)
  • Special Requirements (if applicable)