Gestra NGRS 15-1 Compact System for Level Monitoring

Compact System for Level Monitoring

Technical Data Level switch NRGS 15-1 Service pressure
PN 25, 25 bar at 224°C Mechanical connection Screwed G 1A, EN ISO 228-1 Materials
Screw-in body:
1.4571, CrNiMoTi17-12-2 or 1.4404, A 470 316L for NPT thread Electrode rods:
1.4571, CrNiMoTi17-12-2 Insulation of electrode rod: PTFE Spacer disc:
PTFE Terminal box:
Polycarbonate Electrode rods Length supplied:
1000 mm Diameter:    5 mm Supply voltage 220 – 240 V +10/–15 %, 50/60 Hz
110 – 120 V +10/–15 %, 50/60 Hz (optional) 24 V +10/–15 %, 50/60 Hz (optional)
Power consumption 3 VA Fuse external 63 mA, slow blow, at 230 V, external 125 mA, slow blow, at 115 V,
external 1 A, slow blow, at 24 V.
Response sensitivity (Electrical conductivity of water at 25°C) > 0.5 ... < 1000 μS/cm or > 10 ... < 10000 μS/cm (switch-selectable)
Electrode voltage 20 Vss Output 4 volt-free change-over contacts, 8 A 250 V AC / 30 V DC cos ϕ = 1 (IEC 61810)
Ensure interference suppression by providing contactor with an arc suppressor RC combination
Energizing /de-energizing delay Relay 1 and 2:
1s, factory set Relay 3:
0-30s, adjustable via potentiometer Relay 4:
3s, factory set Indicators and adjustors 3 red LEDs to indicate "Low level alarm 1 + 2 / High level".
1 yellow LED to indicate "Pump ON".
1 green LED to indicate "Power ON".
1 ten-pole code switch to select the sensitivity range and to establish the functions.
1 potentiometer for setting the time delay (0 to 30 s 1 test button in the terminal box to check the function of switching channel 1 (connected to terminals).
1 reset button in the terminal box to reset the lock-out function (connected to terminals).
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NRGS 15-1 - Installation Instructions - 818479-06