Instruction Manual

STEP 1 - (continued)

Contactors

Contactors are used to pow

er individual stages of heat or as bac

k-up for safety switches.

Contactors may be of tw

o types:

Partial line-break (or de-energizing)

In the partial line-break arr

angement 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 po

wer 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 pow

er 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 v

ery 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