Thermolec Application &Technical Notes - Manual (Page 11)

STEP 1 - (continued)
Contactors
Contactors are used to power individual stages of heat or as back-up for safety switches.
Contactors may be of two types:
Partial line-break (or de-energizing)
In the partial line-break arrangement the contactor
opens the current path, thus de-energizing the
heater.
Full line-break (or disconnecting)
The full line-break type contactor opens all
ungrounded power lines in the heater. This may be
ordered as an option (Request option C2).
Partial and Full Break Figures
Special power lugs
Heaters are supplied with power terminal blocks rated for copper conductors with 75 ºC insulation.
Aluminum conductors are not recommended and the standard terminal blocks are not sized for
aluminum. Please consult Thermolec if the use of aluminum conductors is considered.
For very high amperages, Thermolec can supply terminal blocks for two or more parallel conductors
per phase.
For more detailed information, please refer to section 2 in brochure "Power supply and fusing
considerations".
THREE EASY STEPS
c c
c c