GESTRA NRS 1-2, Руководство по установке

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14
Electrical Connection
NRS 12
Cable required for wiring to the electrode: fourcore screened cable, e. g. IY(St)Y 2 x 2 x 0.8 or
LIYCY 4 x 0.5
2
.
Max. cable length 100 m with a conductivity from 10 μS/cm.
Max. cable length 30 m with a conductivity from 0.5 μS/cm.
Max. cable length 15 m with a conductivity from 0.5 μS/cm when used in conjunction with inverter
URN 1 (24 V d. c.)
Tools
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Screwdriver for slotted screws, size 2.5, completely insulated according to VDE 06801.
Note
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If the terminal for the lowlevel (MIN) alarm is not connected, provide terminals 11
and 12 with a wire bridge, as otherwise the LED MIN indicating low water level
would be permanently illuminated.
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Connect screen only to terminal 8 of the level switch.
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The sensitivity is indicated on the name plate.
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The rated supply voltage is indicated on the name plate.
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When switching off inductive loads, voltage spikes are produced that may impair
the operation of control and measuring systems. Inductive loads should therefore be
provided with commercial arc suppressor RC combinations, e. g. 0.1 μF/100 Ω.