Nordmann Engineering AT4 D SPA Display, Руководство по обслуживанию

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7
Notes on the function “Ship”
The “Ship” function is used if the Nordmann AT4 D is installed on a vessel. On vessels fault currents are
monitored much more exactly than elsewhere, since these lead to an increased corrosion of the ship trunk.
Due to the fact that small fault currents can flow via the inlet line to earth/mass also during filling, the
main contactor is switched off also during filling cycle with the “Ship” function.
Since no current measurement is possible during filling with deactivated main contactor, the filling time
is controlled via the inlet factor.
Select “ Ship ” in the GFCI menu, then press the <Set> key.
In the upcoming modification dialogue set the desired inlet factor.
Factory setting:
1 (Filling cycle 30 seconds)
Setting range:
0.5
(Filling cycle 10 seconds)
up to 2.0
(Filling cycle 60 seconds)
Note: With inlet factor 1 the filling cycle takes 30 seconds then, the inlet valve is closed and the main
contactor is activated, in order to check the current rise. If the desired current value is not yet achieved
(110% of the nominal current), the main contactor is deactivated again, and another filling cycle of
30 seconds starts.
If the current is always too high after a filling cycle of 30 seconds (InletFactor 1), the filling time can be
reduced up to 15 seconds (=> inlet factor 0.5).
Or vice versa if it always takes 2 – 3 filling cycles to reach the desired current value, the filling time can
be increased up to 60 seconds (=> inlet factor 2).
GFCI
GFCI :Set
GFCI-Mode :On
Esc Set
GFCI
InletFactor :1.0
GFCI :Set
GFCI-Mode :On
Esc Set
GFCI-Mode
Off
On
Ship
Ship
Esc Set
GFCI
InletFactor :1.0
GFCI-Mode :On
Esc Set
InletFactor
1.0
1.0
Esc Set
Engineering
Drain Cool :On
GFCI :Set
Overcurrent :Float
Max.op.hr SC:5000h
Min.Request :25/20%
Esc Set