Siemens SIRIUS 3RU2 Thermal Overload Relays
Siemens SIRIUS 3RU2 Thermal Overload Relays provide inverse-time delayed protection up to 100A for loads with normal starting against impermissibly high temperature rises due to overload or phase failure. The Siemens SIRIUS 3RU2 Thermal Overload Relays protect three-phase and single-phase AC and DC motors. The series is suitable for any industry needing optimum inverse-time delayed protection of electrical loads under normal starting conditions (CLASS 10, 10A). The relays compensate for temperatures over a -40°C to +60°C range according to IEC 60947-4-1. From +60°C to +70°C, the upper set value of the setting range must be reduced by a specific factor.
Features
- Up to 100A inverse-time delayed protection for loads with normal starting against impermissibly high temperature rises due to overload or phase failure
- Designed for protection of three-phase and single-phase AC and DC motors
- -40°C to +70°C (up to the devices compensate temperature in the temperature range from -40°C to +60°C according to IEC 60947-4-1)
- Certified in accordance with the European Explosion Protection Directive (ATEX) and the International Explosion Protection Standard (IECEx)
Overview
Publicado: 2023-08-23
| Actualizado: 2026-01-26