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Industrial Automation


  • $204.97

NFC 3-phase monitoring relay, 8 A, 2 CO, multifunction, 208…480 V AC

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range of product

Harmony Control Relays

product or component type

3-phase control relay

relay type

Control relay

network number of phases

3 phases

relay name


relay monitored parameters    

Phase sequence
Phase failure detection
Overvoltage detection
Undervoltage detection
Over frequency and under frequency

Supported OS


software version

V4.4 and above

App for product

Zelio NFC (downloadable from Google Play store)

product compatibility

NFC enabled mobile device

time delay type

On-delay 0.1 s...60 min
Off-delay 0.1 s...60 min

switching capacity in VA

2000 VA

NFC operating frequency

13.56 MHz

Maximum RF power transmitted

0.0002 mW

reset time

1500 ms at maximum voltage

maximum switching voltage

250 V AC

minimum switching current

100 mA at 6 V

maximum switching current

8 A AC

[Us] rated supply voltage

208...480 V AC line to line
120...277 V AC line to neutral

supply voltage limits

166.4…576 V AC line to line
96…332.4 V AC line to neutral

power consumption in VA

4 VA at 480 V AC 60 Hz

on-load factor

100 %

supply voltage frequency

50...60 Hz +/- 10 %

output contacts

2 C/O

setting accuracy of the switching threshold

+/- (1.5 % + 1 V)

setting accuracy of time delay

+/- 3 % for 10 s...60 min time delay range
+/- 300 ms for 0...10 s time delay range


3 % of fixed for phase failure detection

alarm threshold

166...576 V adjustable overvoltage and undervoltage detection (line to line)
96...332 V adjustable overvoltage and undervoltage detection (line to neutral)
5...150 V adjustable asymmetry
45...66 Hz adjustable over frequency or under frequency

Run-up delay at power-up max

650 ms

maximum measuring cycle

150 ms measurement cycle as the true RMS value

repeat accuracy

+/- 0.5 % for input circuit
+/- 3 % for time delay

setting accuracy of the switching threshold      

+/- (1.5 % + 1 V)

measurement error

< 0.05 %/Hz with frequency variation
< 0.05 %/°C with temperature variation

response time

<= 300 ms

insulation resistance

> 100 MOhm at 500 V DC conforming to IEC 60255-27

[Ui] rated insulation voltage

400 V

[Uimp] rated impulse withstand voltage

4 kV during 1.2/50 µs

dielectric test voltage

2.5 kV, 1 min AC 50 Hz conforming to IEC 60255-27

mounting position

Any position

connections - terminals

Screw terminals, 2 x 0.5...2 x 2.5 mm² (AWG 20...AWG 14) solid without cable end
Screw terminals, 2 x 0.5...2 x 1.5 mm² (AWG 20...AWG 16) flexible with cable end
Screw terminals, 1 x 0.5...1 x 3.3 mm² (AWG 20...AWG 12) solid without cable end
Screw terminals, 1 x 0.5...1 x 2.5 mm² (AWG 20...AWG 14) flexible with cable end

tightening torque

0.6…1 N.m conforming to IEC 60947-1
0.60…0.99 N.m conforming to IEC 60947-1

housing material

Self-extinguishing plastic

local signalling

LED Un: (steady), green for power ON
LED R1: (steady), amber for relay energised
LED R1: (blinking), amber for timing in progress
LED R2: (steady), amber for relay energised
LED R2: (blinking), amber for timing in progress
LED PL: (steady), red for alarm phase failure triggered
LED PS: (blinking), red for alarm phase sequence failure triggered
LED UV: (steady), red for alarm undervoltage failure triggered
LED OV: (blinking), red for alarm overvoltage failure triggered
LED UF: (steady), red for alarm under frequency failure triggered
LED OF: (blinking), red for alarm over frequency failure triggered
LED ASYM: (steady), red for alarm asymmetry failure triggered

mounting support

35 mm DIN rail conforming to EN/IEC 60715

electrical durability

100000 cycles

mechanical durability

10000000 cycles

utilisation category

AC-15 conforming to IEC 60947-5-1
DC-13 conforming to IEC 60947-5-1
AC-1 conforming to IEC 60947-4-1
DC-1 conforming to IEC 60947-4-1

[Ith] conventional free air thermal current    

8 A

contacts material

Cadmium free


22.5 mm


90 mm


99 mm

contacts type and composition

2 C/O

net weight

0.125 kg