Atlas Copco QAS 100 Instruction Manual page 82

Q1 ....... Circuit breaker for X1
Interrupts the power supply X1 when a
short-circuit occurs at the load side, or when
the overcurrent protection is activated.
When activated, Q1 interrupts the three
phases towards X1. It must be reset
manually after eliminating the problem.
X1 ....... Main power supply (400 Vac)
Terminals L1, L2, L3, N (= neutral) and PE
(= earthing), hidden behind the control panel
door and behind a small transparent door.
S13
N14 ..... Insulation monitoring relay
Checks the
activates Q1 when the insulation resistance
is too low.
Q1
S2 ....... Emergency stop button
Push the button to stop the generator in case
N13
of an emergency. When the button is
N14
pressed, it must be unlocked, by turning it
anti-clockwise, before the generator can be
restarted. The emergency stop button can be
secured in the locked position with the key,
to avoid unauthorized use.
X1
insulation resistance and
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"Electricité de France" (EDF)
When the EDF-option is installed, the unit operates as
a standard unit when the neutral and the PE terminals
are connected to each other (see figure below). In this
case, an earth leakage at the side of the generator or at
the side of the load will switch off the circuit breaker.
N
L1 L2 L3
When EDF-option is installed, the unit operates as
EDF-unit when the earthing, the PE and the PE EDF
terminals are connected to each other (see figure
below). In this case, an earth leakage at the side of the
generator will switch off the circuit breaker. An earth
leakage at the side of the load will not switch off the
circuit breaker.
PE EDF
PE