Siemens 3RU2126-4EB0 | Sirius 3RU21264EB0 Thermal Overload Relay, 1NC-1NO Contact
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The 3RU21 thermal overload relays up to 40 A have been designed for inverse time delayed protection of loads with normal starting against excessive temperature rises due to overload or phase failure. An overload or phase failure results in an increase of the motor current beyond the set rated motor current. Via heating elements, this current rise heats up the bimetal strips inside the device which then bend and as a result trigger the auxiliary contacts by means of a tripping mechanism. The auxiliary contacts then switch off the load by means of a contactor. The break time depends on the ratio between the tripping current and current setting Ie and is stored in the form of a long term stable tripping characteristic. The "tripped" status is signaled by means of a switch position indicator. Resetting takes place either manually or automatically after a recovery time has elapsed.
Features
- Overload and phase failure protection
- Manual and automatic reset
- Switch position indicators
- TEST function
- STOP button
- Size S0
- Class 10
- Optimized to the 3RT contactors such that in addition to individual mounting they can mounted directly mounted onto the contactors to save space
- -50 to 80 deg C environmental condition
- B600/R300 contact
Specifications
| Brand | Siemens |
|---|---|
| MPN | 3RU2126-4EB0 |
| Frequency rating | 50/60 Hz |
| Number of poles | 3 |
| Temperature rating | -20 to 70 deg C |
| Terminal type | Threaded |
| Application | For protection of three phase and single phase AC and DC motors |
| Standards and approvals | CCC Certified, CE Certified, CSA Certified, EAC Approved, UL Listed |
| Dimensions | 85 mm H x 45 mm W x 85 mm D |
| Contact form | 1NC-1NO |
| Enclosure type | IP20 |
| Mounting type | Contactor |
| EAN/UCC-13 | 4011209780989 |
| Contact rating | 32 A at 690 VAC |
- SKU SIEMAN3RU21264EB0
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