Technical Data - Gestra NRS 1-9 Betriebsanleitung

Technical Data

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NRS 19
Type approval no.
TÜV · WR/WB · 04-70
EG 0 0 9-B0-0075
Input
8 connections for one level electrode NRG 6-6, PN 40
Output contacts
For level limiter part:
Two volt-free relay contacts
For level controller part:
One volt-free working contact for feedwater on-off control.
One volt-free relay contact for high level alarm.
Contact material silver, hard gold plated.
Max. contact rating with switching voltages of 4 V, 5 V and 0 V a.c.:
4 A resistive, 0.75 A inductive at cos j 0.5
Max. contact rating with switching voltage of 4 V d.c.: 4 A
Delay of response
The low water level alarm signal is factory set to react after a time delay of
 or  seconds (up to 5 sec. delay is possible).
The controller as well as the high water level alarm signal is factory set to react after a time delay of
 seconds.
Sensitivity
Range : 0 µS/cm at 5 °C
Range : 0.5 µS/cm at 5 °C
The selection of the above range is done via a code switch.
Indicators and adjustors
One green LED "Power", two LEDs "Low level alarm", one test button "TEST ", one toggle switch
"TEST /INSPECTION", one LED "Feedwater control on", one LED "High level alarm" and one four-
pole code switch.
Mains supply
0 V +/– 0 %, 50/60 Hz (please state voltage when ordering)
Special voltage: 5 V +/– 0 %, 50/60 Hz or 4 V +/– 0 %, 50/60 Hz;
4 V d. c. supply is also possible with the inverter type URN-.
Protection
IP 0 in accordance with DIN 40050
Admissible ambient temperature
0 to 55 °C
Case materials
Base: ABS plastic, black. Cover: polystyrene, highly shock resistant, stone grey.
Weight
0.6 kg
6