Atlas Copco QAS 275-325, Instruction Manual, Page: 75 / 114

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Outlet sockets (S)
A brief description of all outlet sockets and circuit
breakers provided on the generator is given hereafter:
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
manuallly after eliminating the problem.
Q2 .......Circuit breaker for X2
Interrupts the power supply to X2 when a
short-circuit occurs at the load side, or when
the overcurrent protection (16 A) is
activated. When activated, Q2 interrupts one
phase (L3) towards X2. It can be activated
again after eliminating the problem.
Q3 .......Circuit breaker for X3
Interrupts the power supply to X3 when a
short-circuit occurs at the load side, or when
the overcurrent protection (125 A) is
activated. When activated, Q3 interrupts the
three phases towards X3. It can be activated
again after eliminating the problem.
Q4 .......Circuit breaker for X4
Interrupts the power supply to X4 when a
short-circuit occurs at the load side, or when
the overcurrent protection (63 A) is
activated. When activated, Q4 interrupts the
three phases towards X4. It can be activated
again after eliminating the problem.
Q5 .......Circuit breaker for X5
Interrupts the power supply to X5 when a
short-circuit occurs at the load side, or when
the overcurrent protection (32 A) is
activated. When activated, Q5 interrupts the
three phases towards X5. It can be activated
again after eliminating the problem.
Q6 .......Circuit breaker for X6
Interrupts the power supply to X6 when a
short-circuit occurs at the load side, or when
the overcurrent protection (16 A) is
activated. When activated, Q6 interrupts the
three phases towards X6. It can be activated
again after eliminating the problem.
X1 .......Main power supply (400/480 V AC)
Terminals L1, L2, L3, N (= neutral) and PE
(= earthing), hidden behind the control panel
door and behind a small transparent door.
X2 .......Socket 16 A Rim earthing
Provides lines L3, N (= neutral) and PE (=
earthing).
Socket 16 A Pin earthing
Provides lines L3, N (= neutral) and PE (=
earthing).
Socket 16 A CEE earthing
Provides lines L3, N (= neutral) and PE (=
earthing).
X3 .......3-phase outlet socket
Provides phase L1, L2, L3, neutral and
earthing.
Q3 Q4 Q5 Q6 Q2
X2 X4
X5
L1L2
OFF
L1-N
L2L 3 L2-N
L 3 L1
LL LN
L 3 -N
Q3 Q6
Q2
Q1
Q4 Q5
N13
X2
X4
X3
X6
X5
S 2
Q1
X1
X3 X6