Atlas Copco QAS 100 Instruction Manual page 80

Q1.1 .... Circuit breaker for low voltage, high
current
Interrupts the low voltage power supply
towards X1 when a short-circuit occurs at
the load side or when the overcurrent
protection (1 phase - 3 phase: QAS 60:
175 A, QAS 80: 250 A, QAS 100: 280 A /
3 phase - 3 phase: QAS 60: 152 A, QAS 80:
200 A, QAS 100: 250 A) is activated. It
must be reset manually after eliminating the
problem.
Q1.2 .... Circuit breaker for high voltage, low
current
Interrupts the high voltage power supply
towards X1 when a short-circuit occurs at
the load side or when the overcurrent
protection (QAS 60: 100 A, QAS 80: 125 A,
QAS 100: 144 A) is activated. It must be
reset manually after
problem.
R12 ..... Voltage adjustment
Allows to adjust the output voltage.
!
AMF operation is not possible with a
dual voltage generator.
Depending on which mode the generator is running
in, circuit breaker Q1.1 or Q1.2 will be operational.
Circuit breakers Q1.1 and Q1.2 cannot be switched on
at the same time. This is prevented by means of the
auxiliary voltage selection relays K11 and K12 (refer
to circuit diagram 9822 0996 01/01) or S10b and S10c
(refer to circuit diagram 9822 0996 02/01).
The selection between the two modes is done by
means of S10.
S10 ..... Output voltage selection switch
Allows to select a 3 phase high output
voltage or a 1 phase / 3 phase low output
voltage. Selector switch S10 is located on
the alternator.
Changing the output voltage is only
!
allowed when the unit has stopped.
After changing the output voltage by
means of the selection switch S10,
eliminating the
adjust the output voltage by means of
potentiometer R12 to the required
value.
- 80 -
Earth leakage relay
The Earth relay option provides a detector that will
trip the main circuit breaker Q1 when an earth fault
current is detected.
Q1 ....... Main circuit breaker
S13
Q1
N13
N14
X1