Skip to main content

Siemens SIRIUS 3RU21161BB0 Thermal Overload Relay, 1NC-1NO Contact

Selected 3RU21161BB0Siemens SIRIUS 3RU21161BB0 Thermal Overload Relay, 1NC-1NO Contact
3RU21161BB0Siemens SIRIUS 3RU21161BB0 Thermal Overload Relay, 1NC-1NO Contact

Documents

Short Description

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 S00
  • 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
  • B600/R300 contact

Specification

Frequency Rating
50/60 Hz
Mounting Type
Surface
Number Of Poles
3
Minimum Order Qty
1
Order Interval
1
Video
https://www.youtube.com/watch?v=n2AKmVUVH7Y
Catalog ID
SIE3RU21161BB0
Contact Form
1NC-1NO
Contact Rating
2 A at 690 VAC
Dimensions
76 mm H x 45 mm W x 70 mm D
Enclosure Type
IP20
Temperature Rating
-40 to 70 deg C
Terminal Type
Threaded
Standard & Approvals
CCC Marked, CE Marked, CSA Certified, EAC Standard, UL Listed
EANUCC13
4011209781603

Call it Something Else?

Loading product details...