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Electrical Data: Connections and Wiring Convectronics Manufactures First Class Heaters, Temperature Sensors and Precise Controls, Assists with Design and Application Needs.

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Electrical Data: Connections and Wiring
Time and Temperature Data
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Refractory Metals Corrosion Resistance Guide
Tubing, Sheath, Prot. Tube, Well Materials Guide
RTD and Thermistor Resistance vs. Temp. Table
Thermocouple Reference Tables N.I.S.T °C:
Thermocouple Reference Tables N.I.S.T °F:
Electrical Charts & Conversions
Temperature Equivalents & Conversions
Equivalents & Conversions
Customer Application Data Sheet / RFQ

Technical Information
Electrical Data: Connections and Wiring

 
 
Typical Heater Connections
 
Parallel
Cartridge Heaters are usually wired in a simple parallel connection. Heaters are rated at applied voltage.

Parallel (Single Phase)
Cartridge heaters may be wired in series.
1. To reduce wattage in a system, two heaters rated at 240V wired in series will reduce the total wattage to 1/4 of its rated value when 240V is applied. Three similar heaters wired in series will reduce wattage to 1/9 of its rated value.
2. For use at higher voltage - two 120V heaters wired in series for use on 240V, or two 240V heaters wired in series for 480V.

3 Phase Delta
The most commonly used method of making 3 Phase connections. The heaters are arranged in multiples of 3 for a balanced system.

   
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Typical Wiring Diagrams - Single Phase   Three Phase
     
AC or DC Heater Circuit
 
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Circuit with thermostat connected for half current load across each contact
 
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Typical connections when line current exceeds thermostat rating
 
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3 Phase
 
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Typical connections when line current exceeds thermostat rating
 
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Typical connection with ETR temperature control
 
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Convectronics, Inc.   •   Ward Hill Industrial Park West, 111 Neck Road Haverhill, MA 01835 USA   •   978-374-7714
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