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ABB MOTOR PROTECTION AND CONTROL 3/275

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NF contactor relays
Technical data

Magnet System Characteristics - NF contactor relays AC / DC operated 03
Contactor relay types AC / DC operated NF
Coil operating limits AC supply At θ ≤ 60 °C 0.85 x Uc min...1.1 x Uc max.
acc. to IEC 60947-5-1 At θ ≤ 70 °C 0.85 x Uc min...Uc max.
DC supply at θ ≤ 60 °C 0.85 x Uc min ... 1.1 x Uc max
at θ ≤ 70 °C 0.85 x Uc min ... Uc max
AC control voltage 50/60 Hz
Rated control circuit voltage Uc 24...500 V AC
Coil consumption Average pull-in value 50 VA
Average holding value 2.2 VA / 2 W
DC control voltage
Rated control circuit voltage Uc 20...500 V DC
Coil consumption Average pull-in value 50 W
Average holding value 2 W
PLC-output control Not suitable for direct control by PLC-output
Drop-out voltage ≤ 60 % of Uc min.
Voltage sag immunity acc. to SEMI F47-0706 –
Dips withstand
-20 °C ≤ θ ≤ +60 °C –
Operating time
Between coil energization and: N.O. contact closing 40...95 ms
N.C. contact opening 38...90 ms
Between coil de-energization and: N.O. contact opening 11...95 ms
N.C. contact closing 13...98 ms
Magnet System Characteristics - NFZ contactor relays 24V DC operated - designed for PLC - coil 30
Contactor relay types DC operated NFZ
Coil operating limits DC supply at θ ≤ 60 °C 0.85 ... 1.1x Uc
acc. to IEC 60947-5-1 at θ ≤ 70 °C Uc
DC control voltage
Rated control circuit voltage Uc 24 V DC
Coil consumption Average pull-in value 6 W
Average holding value 1.7 W
PLC-output control ≥ 250 mA 24 V DC for PLCs and safety PLCs using broken wire detection
Drop-out voltage ≤ 60 % of Uc min.
Operating time
Between coil energization and: N.O. contact closing 27 … 53 ms
N.C. contact opening 20 … 35 ms
Between coil de-energization and: N.O. contact opening 17 … 29 ms
N.C. contact closing 22 … 57 ms

Magnet System Characteristics - NFZ... contactor relays - for specific applications - coils 20, 21, 22, 23
Contactor relay types AC / DC operated NFZ
Coil operating limits AC supply at θ ≤ 60 °C 0.85 x Uc min ... 1.1 x Uc max
acc. to IEC 60947-5-1 at θ ≤ 70 °C 0.85 x Uc min ... Uc max
DC supply at θ ≤ 70 °C 0.85 x Uc min ... 1.1 x Uc max
AC control voltage 50/60 Hz
Rated control circuit voltage Uc 24...250 V AC
Coil consumption Average pull-in value 16 VA
Average holding value 1.7 VA / 1.5 W
DC control voltage
Rated control circuit voltage Uc 12...250 V DC
Coil consumption Average pull-in value 12 ... 16 W
Average holding value 1.7 W
PLC-output control (NFZ coil 21) ≥ 500 mA 24 V DC for PLCs - Not suitable for safety PLCs
Drop-out voltage ≤ 60 % of Uc min.
Voltage sag immunity acc. to SEMI F47-0706 Conditions of use on request
Dips withstand
-20 °C ≤ θ ≤ +60 °C (NFZ coil 21, 22, 23) 20 ms average for Uc ≥ 24 V 50/60 Hz or Uc ≥ 20 V DC
Operating time
Between coil energization and: N.O. contact closing 40...95 ms
N.C. contact opening 38...90 ms
Between coil de-energization and: N.O. contact opening 11...95 ms
N.C. contact closing 13...98 ms