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Siemens 3RR2 Monitoring Relays

Siemens 3RR2 Monitoring Relays are designed for continuous supervision of motor currents and load conditions in industrial control panels. These relays are mounted directly onto RT2 contactors for compact motor starter assemblies. The 3RR2 monitoring relays detect various faults, including overcurrent, undercurrent, phase failure, cable breaks, current asymmetry, and blocked‑rotor conditions, to prevent machine damage and reduce downtime.

Features

  • Continuous supervision of motor currents and load conditions
  • Mounted directly onto RT2 contactors
  • IP20 protection
  • Detect various faults, including overcurrent, undercurrent, phase failure, cable breaks, current asymmetry, and blocked‑rotor conditions
View Results ( 31 ) Page
N.º de artículo Hoja de datos Descripción
3RR21433AA30 3RR21433AA30 Hoja de datos Relés industriales CURRENT MONITOR S2 24VUC 8-80A SPRING
3RR24421AA40 3RR24421AA40 Hoja de datos Relés industriales CURR MON IO-LINK S0 4-40A 24VDC SCREW
3RR21411AA30 3RR21411AA30 Hoja de datos Relés industriales CURRENT MONITR S00 1.6-16A 24VUC SCREW
3RR21411AW30 3RR21411AW30 Hoja de datos Relés industriales CURRENT MONITR S00 1.6-16A 24-240VUC SCW
3RR21412AA30 3RR21412AA30 Hoja de datos Relés industriales CURRENT MONITR S00 1.6-16A 24VUC SPRING
3RR21412AW30 3RR21412AW30 Hoja de datos Relés industriales CURRENT MONITR S00 1.6-16A 24-240VUC SPG
3RR21421AA30 3RR21421AA30 Hoja de datos Relés industriales CURRENT MONITR S0 4-40A 24VUC SCREW
3RR21421AW30 3RR21421AW30 Hoja de datos Relés industriales CURRENT MONITR S0 4-40A 24-240VUC SCREW
3RR21422AA30 3RR21422AA30 Hoja de datos Relés industriales CURRENT MONITR S0 4-40A 24VUC SPRING
3RR21422AW30 3RR21422AW30 Hoja de datos Relés industriales CURRENT MONITR S0 4-40A 24-240VUC SPRING
Publicado: 2026-02-17 | Actualizado: 2026-03-02