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Model ZPA and ZPA3 Series -Heater Control Panel
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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.
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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
- Heavy gauge gasketed enclosure finished in grey Epox
- Integral "Dead Front" switch
- "Off-On" Control Power selector switch
- "Power-On" pilot light
- Illuminated reset button
- Digital indicating electronic temperature controller Circuit breaker with mechanism
- Control transformer with fused primary lines and fused/grounded secondary lines
- "Zero Fire" type SCR assembly with external cooling, Three pole safety magnetic contactor(s)
- Electronic over-temperature controller
- Fast acting fuses for circuit protection
- Terminal strips for customer connections
- Safety relay button to ensure safe shut down and the ability to enable systems remotely