Instruction manual

ManualsBrandsAutostart ManualsAutomotivePD-2.7

44 2954 2370 00

QAS 30 - 45 - 60 Pd

7.3.11 IT-relay

The generator is wired for an IT network i.e. no supply lines of the

power supply are directly earthed. A failure in insulation resulting

in a too low insulation resistance, is detected by the insulation

monitoring relay.

Q1 ..... Circuit breaker for X1

Interrupts the power supply X1 when a short-circuit occurs at

the load side, or when the overcurrent protection (QAS 30:

50 A, QAS 45: 63 A, QAS 60: 100 A) 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 V AC)

Terminals L1, L2, L3, N (= neutral) and PE (= earthing),

hidden behind the control panel door and behind a small

transparent door.

N14 ... Insulation monitoring relay

Checks the insulation resistance and activates Q1 when the

insulation resistance is too low.

S2...... Emergency stop button

Push the button to stop the generator in case of an emergency.

When the button is 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.

7.3.12 Refinery equipment pack

This refinery equipment option consists of :

– Integrated spark arrestor

– Engine air inlet shut-off valve

Air inlet shut-off valve

The engine air inlet shut-off valve option will prevent over-

speeding of the engine due to combustible gases being traced

within the normal engine air intake.

The generator shall not be operated with other

networks (such as TT or TN). Doing so will cause

tripping of the insulation monitoring relay.

The generator is wired for an IT network i.e. no

supply lines of the power supply are directly

earthed. A failure in insulation resulting in too low

an insulation resistance, is detected by the insulation

monitoring relay.

At each start-up and any time a new load is

connected, the insulation resistance must be verified.

Check for the correct setting of the insulation

monitoring relay (factory set at 13 k

Ω).

N14 Q1

N14