Description
Order No.: 3RT25451AL20 3RT2545-1AL20 Power contactor, AC-3 80 A, 37 kW / 400 V 2 NO + 2 NC 230 V AC, 50/60 Hz 4-pole Size S3 screw terminals 1 NO + 1 NC integrated
Overview Standards
IEC/EN 60947‑1, IEC/EN 60947‑4‑1, IEC/EN 60947‑5‑1 (auxiliary switches)
The contactors are suitable for use in any climate. They are finger-safe according to IEC 60529.
The accessories for the 3-pole 3RT2 contactors can also be used for the 4-pole versions, see Accessories and Spare Parts for SIRIUS 3RT2 Contactors and SIRIUS 3RH2 Contactor Relays.
Size S0 to S3 contactors have two auxiliary contacts 1 NO and 1 NC integrated in the basic version.
Mountable auxiliary contacts
Sizes S00 to S3
Four additional auxiliary contacts, including no more than two NC contacts
For a general description of sizes S00 to S3 of 3RT2 contactors, see SIRIUS 3RT Contactors, 3-pole up to 250 kW.
Use of 3RT contactors with IE3/IE4 motors
Note:
For the use of 3RT25 contactors in conjunction with highly energy-efficient IE3/IE4 motors, please observe the information on dimensioning and configuring, see Application Manual.
For more information, see IE3/IE4 ready portal.
Application
The contactors are suitable for:
For changing the polarity of hoisting gear motors
For switching two separate loads
Note:
Single device for pole reversal; not suitable for reversing duty. 3RT25 contactors are not suitable for switching a load between two current sources.
