Instruction manual
2954 2100 01 37
7.3.7 Electronic speed regulator
The electronic speed regulator makes sure that the output frequency
of the generator is 60 Hz, independent of the amount of load. The
accuracy at constant load is ± 0.25%.
7.3.8 Low voltage (LV)
The "Low voltage" option allows to run the unit at low voltage
(= high current).
Q1......Circuit breaker for low voltage, high current
Interrupts the low voltage power supply towards X1.1 when a
short-circuit occurs at the load side or when the overcurrent
protection (QAS 14: 50 Hz/60 Hz, 20 A, QAS 20: 50 Hz/60 Hz,
32 A) is activated. It must be reset manually after eliminating
the problem.
7.3.9 Single phase (1 PH)
The "Single phase" option provides single phase output voltage
(e.g. 230 V).
X1.1...Main power supply (230 V AC)
Terminals L1, L2, N (= neutral) and PE (= earthing), hidden
behind the control panel door and behind a small transparent
door.
Q1......Circuit breaker for single phase operation
Interrupts phases L1, L2 and N towards X1 when a short-
circuit occurs at the load side or when the overcurrent
protection (50 A) is activated. It must be reset manually after
eliminating the problem.
7.3.10 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
N13....Earth leak detector
Detects and indicates an earth fault current and activates the
main circuit breaker Q1. The detection level can be set at 0.03
A fixed with instantaneous trip but can also be adjusted
between 0.1 A and 1 A with time delayed (0 - 0.5 sec) trip. N13
has to be reset manually after eliminating the problem (reset
button marked R). It can be overridden by means of the earth
leak switch (S13, labelled I∆N) but has to be tested monthly
(by pushing test button T).
S13 ....Lock-out switch for earth fault protection (N13)
This switch is located inside the cubicle and is labelled I∆N.
Position O: No de-energising of the main circuit breaker Q1
when an earth fault occurs.
Position 1: De-energising of the main circuit breaker Q1 when
an earth fault occurs.
All the cables that are used must be suitable for high
current.
!
Q1
X1.1
Q1
X1.1
Q1
X1.1
Q1
X1.1
Position O will only be used in conjunction with an
external earth fault protection unit (e.g. integrated
in a distribution board).
If S13 is in position O, proper earthing is of the
utmost importance for the safety of the user. Elimi-
nating any earth fault protection can lead to serious
injury or even death for anybody touching the unit
or the load.
N13
0
10
30
20
0
400
200
www.atlascopco.com
!
Qc 1001
Appl. 1.00.1
Q1
S13
Q1
N13
!
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