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9.3.7
IT-relay
The generator set 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.
Q600 ... Circuit breaker for X10
Interrupts the power supply X10 when a
short-circuit occurs at the load side, or when
the overcurrent protection is activated.
When activated, Q600 interrupts the three
phases towards X10. It must be reset
manually after eliminating the problem.
X10 .....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.
EM1 ....Insulation monitoring relay
Checks the insulation resistance and
activates Q600 when the insulation
resistance is too low.
The generator set shall not be
operated with other networks (such
as TT or TN). Doing so will cause
tripping of the insulation
monitoring relay.
The generator set 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
)
!
Stop
Auto
Start
X10
EM1
Q600
