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Type ZPA and ZPA3

ZPA and ZPA3 series control panels use zero cross (burst firing) three phase analog SCR's (Thyristors). Designed for larger electric heater loads, these panels are available in sizes from 85 to over 2500 amps.

zpa

Analog SCR

  • Four SCR for 2 Leg
  • Six SCR for 3 Leg
  • Sync-Guard to smooth out line current draw when multiple controllers are used
  • Thermostatically protected
  • Shorted SCR Detection
  • UL/cUL,CSA approval