CHAPTER 4: ELECTRICS 4-7
ALPHA 538/552
(4) Circuit breaker QF2 (4 Amps)
Circuit breaker QF2 protects the two phases, which power the
transformer.
Should the latter require excessive power (>4 Amps), the breaker
activates and lever (B) flips down.
The power supply to the transformer is immediately interrupted to
avoid material damages.
After having located and repaired the problem causing this
interruption, reset the lever (B) of the circuit breaker.
(5) Transformer 220 V (T1)
If the power supplied by the interface cable does not meet the required 220V AC the transformer must be
used.
The incoming power must be connected to the Primary Terminal Block. Use the contacts corresponding
to the supplied power (346V AC to 440V AC, see drawing below).
The outgoing power is always connected to the 220VAC terminals of the Secondary Terminal Block.
Designation
Description
A Power in connecting terminal
B Lever on/off
C Power out connecting terminal
Primary terminal block
Secondary terminal block
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