7
Level switch NRGS 15-1
Technical Data
Service pressure
PN 25, 25 bar at 224°C
Mechanical connection
Screwed G 1A, ISO 228
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).
