Page 788 - ABB_Motor _Protection_and_Control_catalogue_20221216

6/50 ABB MOTOR PROTECTION AND CONTROL

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EF460, EF750, EF1250DU electronic overload relays – 150 to 1250 A

Technical data

Main circuit – Utilization characteristics according to UL/CSA
Type EF460 EF750 EF1250DU
Standards UL60947-1, UL60947-4-1
Maximum operational voltage 600 V AC
Trip rating 125% of FLA
Auxiliary circuit according to UL/CSA
Type EF460 EF750 EF1250DU
Contact rating N.C., 95-96 B600, Q600
N.O., 97-98 B600, Q600
Conventional thermal current 5 A

General data
Type EF460 EF750 EF1250DU
Pollution degree 3
Phase loss sensitive Yes
Ambient air temperature
Operation Open - compensated -25 ... +70 °C
06
Storage -50 ... +85 °C
Ambient air temperature compensation Acc. to IEC/EN60947-4-1
Maximum operating altitude permissible 2000 m
Resistance to shock acc. to IEC 60068-2-27 25g / 11 ms
Resistance to vibrations acc. to IEC 60068-2-6 5g / 3 … 150 Hz
Degree of protection Housing IP20
Main circuit terminals IP00
Electrical connection
Auxiliary circuit
Type EF460 EF750 EF1250DU
Connecting capacity
Rigid 1 or 2 x 1 ... 4 mm²
Flexible with ferrule 1 or 2 x 0.75 ... 2.5 mm²
Flexible with insulated ferrule 1 or 2 x 0.75 ... 2.5 mm²
Flexible 1 or 2 x 0.75 ... 2.5 mm²
Stranded acc. to UL/CSA 1 or 2 x AWG 18-10
Flexible acc. to UL/CSA 1 or 2 x AWG 18-10
Stripping length 9 mm
Tightening torque 0.8 ... 1.2 Nm / 7 ... 11 Ib.in
Recommended screw driver M3.5 (Pozidriv 2)