Siemens SIRIUS phase-failure and sequence monitoring relay, 22.5 mm, 2 changeover contacts, 3 x AC 400 V, AC 50/60 Hz, screw terminals, snap-on mounting, IP20.
| Parameter | Value |
|---|---|
| Product line / brand name | SIRIUS |
| Parameter | Value |
|---|---|
| Ingress protection (IP rating), wired | IP20 |
| Parameter | Value |
|---|---|
| Mounting type | snap-on mounting |
| Parameter | Value |
|---|---|
| During operation | -25 ... +60 °C |
| Reference code acc. to DIN EN 81346-2 | K |
| Number of poles for main current circuit | 3 |
The Siemens SIRIUS 3UG3513-1BP50 is a phase-failure and phase-sequence monitoring relay in a 22.5 mm housing, designed for 3-phase AC 400 V systems at 50/60 Hz. It provides two changeover contacts and uses screw terminals for wiring.
The relay monitors for phase loss and incorrect phase rotation on a three-phase supply up to 3 x AC 400 V. The two changeover contacts give you one N/O and one N/C per pole, enough to signal a fault and drop a motor starter in a single device.
It uses snap-on mounting onto a 35 mm standard DIN rail according to DIN EN 50022.
The manufacturer lists the replacement type as 3UG4512-1BR20.
The relay is rated for operation from -25 to +60 °C.
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