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International Sales – North & South America (1) 610 436 6080
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Control Panels

Category: Products

 


 

Armstrong/Chemtec custom designs and manufactures every power control panel to assure that the specific heater, for which the controller was designed, will provide the maximum performance. Every control panel is built to industrial specifications, and all components used in the manufacture have been field proven. Heavy duty and conservatively sized power cabling is used. Designs according to NEMA, NEC, CSA and IEC are available where appropriate.

 

Normally, Armstrong/Chemtec heaters are operated in a closed loop system. The primary (and usually exclusive) control variable is the fluid outlet temperature. In the case of fluidized bed heating, the control variable can be vessel temperature. Due to the short response time of typical electric heaters, thyristor power control is required. The heater may be shut down due to various fault conditions such as: excessive pipe temperature, excessive electrical element temperature, ground fault and low flow. Heater power input is regulated by a signal (typically 4-20 ma) from a PID type controller. The control signal can originate within the user’s DCS or from a local temperature controller supplied by Armstrong/Chemtec. Process temperature accuracy of ± 2°F (±1°C) can generally be achieved.

 

Available Components:

Thyristor

Contactor

Circuit Breaker

Temperature Indicating Controller

High Temperature Switch

Control Transformer

Ground Fault Relay

Thyristor Short Circuit Detector

Voltmeter

Ammeter

Watt Transducer

Anti-Condensation Heater

Filtered Cooling Fans

 

Available Trips:

Safety/Shut Down

Ground Fault

High Thyristor Temperature

High Element Temperature

Enclosure Door Switch

Operator Signal (Including Low/No Flow)

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