Flowserve NRS 1-7 - Manual (Page 6)

6
NRS 1-7
Technical Data
Type approval no.
TÜV · WB · 01-354
EG 01202931-B-01-0077
EG 01202931-B-01-0075
Input
Four terminals for the connection of one level electrode
NRG 16-11, PN 40
NRG 16-11S, PN 40
NRG 17-11, PN 63
NRG 19-11, PN 160
NRG 111-11, PN 320
Output
Two volt-free relay contacts (mounted in series in the case of design “b”).
Max. contact rating: 250 V, 300 W, 3 A resistive with a life of 5 x 10
5 switching cycles of 0.35 A
inductive with a life of 2 x 10 6 switching cycles. Contact material silver, hard-gold plated.
Delay of response
Default factory setting: 3 s
Factory setting for marine applications: 15 s
(Up to 25 s possible after prior consultation with TÜV)
Sensitivity
10 µS/cm at 25 °C when used in conjunction with level electrode without measuring surface
extension (cell constant C = 0.3).
0.5 µS/cm at 25 °C when used in conjunction with level electrode with measuring surface extension
(cell constant C = 0.13) – see data sheets “NRG 16-11”, “NRG 111-11”.
Indicators and adjustors
2 LEDs “Alarm”, 1 LED “Power”, 1 button “TEST 1”,
1 switch “TEST 2/INSPECTION”
Mains supply
230 V +/– 10 %, 50/60 Hz (please state voltage when ordering).
Special voltage: 115 V +/– 10 %, 50/60 Hz or 24 V +/– 10 %, 50/60 Hz.
The ancillary unit URN 1 can be used for 24 V d. c. supply.
Power consumption
5 VA
Protection
NRS 1-7 IP 40 to EN 60529
Admissible ambient temperature
0 °C to 55 °C
Case materials
Base: Noryl SE 1-GFN 2 UL 94 VO, black
Cover: R-ABS UL 94 VO, stone grey
Weight
Approx. 0.6 kg