Description: NRA1-3 ( Gestra
)
Gestra NRA1-3
Product Name: Gestra NRA1-3
Product Brand: Gestra
Product Code: NRA1-3
Product Artikel: Gestra NRA1-3
Technical data
Supply voltage
230 V, 50 / 60 Hz
115 V, 50 / 60 Hz optional
Fuse
external, 200 mA, slow-blow
Power consumption
max. 4 W
Inputs
16 inputs for measuring electrodes
NRG 16-19, NRG 16-27, NRG 16-28
1 input for temperature sensor, e. g. TRG 5-53,
measuring insert PT 100
max. length of connecting cables 100 m
Output
1 volt-free relay contact, 4 A 250 V AC /
30 V DC cos φ = 1 (IEC 61810)
Contact material AgNi 0,15
Inductive loads must be provided with interference
suppressors (RC combinations) as specified by the
manufacturer.
Electrode voltage
12 V
Setting for banking-up of condensate
Difference between condensate and plant temperatures
dts 1 K to 100 K, adjustable in steps of 1 K (mode 1 and 6)
Difference between condensate temperature
and switchpoint “Banking-up of condensate”
dtC 1 K to 100 K,
adjustable in steps of 1 K (mode 2 and 7)
Switchpoint “Banking-up of condensate” 0 °C to 255 °C,
adjustable in steps of 5 K (mode 2 and 7)
Indicators and ajustors
1 three-digit seven-segment LED display, red,
for indicating faulty steam traps and status and error
messages
3 LEDs for indicating banking-up of condensate,
steam loss and malfunction in measuring electrode
3 operating buttons
1 ten-pole code switch for system configuration,
node ID and baud rate setting
Design
NRA 1-3a for wall mounting
NRA 1-3e for panel mounting
Housing material: ABS
Protection
NRA 1-3a: IP 65 to EN 60529
NRA 1-3e: Front: IP 65 to EN 60529, back: IP 00
Protection class
NRA 1-3a: 2 (completely insulated)
Weight
approx. 2 kg
Cable gland / Electrical connection
Cable gland with integral cable clamp,
8 x M 16 x 1.5 mm
18 five-pole screw-type terminals,
conductor size 1.5 mm2
1 three-pole screw-type terminal,
conductor size 1.5 mm2
Ambient temperature
when system is switched on: 0°...55 °C
during operation: –10°... 55 °C
