Atlas Copco XAHS 37 DD Instruction Manual page 40

3.3.3 F
UNCTION OF GENERATOR
230V - 3
AND PH WITHOUT AUTOMATIC
CONTROL SYSTEM
X1.1 X1.2
Fig. 3.26 Control panel (generator)
Generator DDG 230/400V:
S7 Switch
H3 Lamp (green)
X1.1 Socket 400 V/ 16A
X1.2 Socket 230 V/ 16 A
X1.3 Socket 230 V/ 16 A
GND Terminal earth cable
Generator DDG 230V:
S7 Switch
H3 Lamp (green)
X1.1 Socket 230 V/ 16A
X1.2 Socket 230 V/ 16 A
X1.3 Socket 230 V/ 16 A
GND Terminal earth cable
Start the unit in accordance with the normal procedure (see
3.2). Let the motor warm up until it reaches operational temperature.
Turn the green switch S7 to position 1.
The normal control system is switched off and the engine speed
increases to reach the maximum.
The green lamp H3 in the switch S7 is activated, showing that sockets
X1.1, X1.2 and X1.3 are under tension.
The generator can be switched off by turning the green switch S7 to
position 0.
40
DDG 230/400V
- F
UNCTIONAL DESCRIPTION
X1.3 H3/S7 GND
section
Fig. 3.27 Generator control box
Generator DDG 230/400V:
Q1 Main circuit breaker 4-pole + shunt trip coil
K6 Insulation monitoring relay
Generator DDG 230V:
Q1 Main circuit breaker 3-pole + shunt trip coil
K6 Insulation monitoring relay
Before connecting an electrical device, always check the
data listed on the rating plate.
Fault situations and protective devices:
– When switching on the generator by means of the switch S7,
there is no voltage available at the sockets. Open the hood and
check if the circuit breakers are up. If the circuit breakers are
down, put them up (switch them on). Circuit breakers in the up
position can be indicative of a serious electrical fault.
– When the electrical device is connected, the circuit breakers
always switch off. This indicates a fault in the electrical device.
– When the yellow LED on the insulation monitoring relay K6 is
activated, it means that a serious insulation fault has occured.
Reset by first switching off the engine, then restart it.
– The insulation monitoring relay K6 must be adjusted to 10 kΩ.
This adjustment may not be changed.
– The thermal contact S6 closes when the temperature in the
generator becomes too high.
Instruction Manual