Star-delta, multifunction and voltage monitoring relays that time and sequence contactor switching, and protect single or three phase supplies against undervoltage fluctuation.
Stefan's timer range includes star-delta timers, multifunction timers and DIN rail timing relays used to sequence and delay contactor switching. The UVR-5151/UVR-5153 under voltage relays protect single or three phase supplies against undervoltage fluctuation at a fixed voltage, with restart time delay (5–15min adjustable) to protect motors against abrupt restarts.
The UVR-5151 monitors single phase supplies (L1, L2), while the UVR-5153 monitors three phase supplies (L1, L2, L3, N), both housed in a compact single-module DIN rail enclosure alongside the timer range.
| Model No. | Type | Function | Delay / Range | Mounting |
|---|---|---|---|---|
| STR SD | Star-Delta Timer | Star-delta motor sequencing | 1–30s adjustable | DIN Rail |
| STR VM5 | Multifunction Timer | Delay-on / delay-off, 10 functions | 0.1s–100h | DIN Rail |
| STR 6DF | Multi-Range Timer | 6 timing functions | 0.1s–100h | DIN Rail |
| STR-X10 | Timer | Single-function timing relay | 1–60min | DIN Rail |
| UVR-5151 | Under Voltage Relay | Single phase undervoltage protection | 5–15min restart | DIN Rail |
| UVR-5153 | Under Voltage Relay | Three phase undervoltage protection | 5–15min restart | DIN Rail |
Get expert guidance on selecting the right timer or under voltage relay for your motor and supply protection needs.
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