ABB CT-SDD.22 1SVR500211R0100 star-delta timer relay with 24–48 V DC and 24–240 V AC supply, adjustable 0.05 s to 10 min timing range and two normally open outputs for motor control applications.
£65.14
The ABB CT-SDD.22 (1SVR500211R0100) is a compact and reliable electronic star-delta timer relay designed for automatic control of motor starting sequences in industrial automation and motor control applications. As part of the trusted ABB CT-D electronic timer relay range, it provides accurate timing control for star-delta starters used with three-phase motors.
This single-function timer relay provides a dedicated star-delta changeover function with adjustable timing ranges from 0.05 s to 10 min and a fixed transition time of 50 ms. Its compact modular housing and DIN rail mounting capability make it ideal for industrial control panels where reliable timing and space efficiency are required.
With a wide 24–48 V DC / 24–240 V AC control supply range, 2 normally open relay outputs and a compact 17.5 mm housing, the ABB CT-SDD.22 provides dependable control for motor starting applications.
Star-delta timer relays such as the ABB CT-SDD.22 control the transition between star and delta motor connections, helping reduce starting current and provide smoother acceleration for three-phase motors.
The ABB CT-D timer relay family combines compact modular construction with dependable electronic timing technology, making it suitable for OEM machinery, industrial automation panels and motor control systems requiring accurate sequencing.
| Manufacturer | ABB |
|---|---|
| Series | CT-D Electronic Timer Relays |
| Model | CT-SDD.22 |
| Product ID | 1SVR500211R0100 |
| Product type | Electronic star-delta timer relay |
| Function | Star-delta changeover |
| Time range | 0.05 s to 10 min |
| Transition time | Fixed 50 ms |
| Control supply voltage | 24–48 V DC / 24–240 V AC |
| Output | 2 normally open contacts |
| Rated operational voltage | 250 V |
| Rated operational current | 5 A at 230 V AC (AC-12) |
| Mounting type | 35 mm DIN rail mounting |
| Terminal type | Screw terminals |
| Protection rating | IP20 terminals |
| Dimensions (W × H × D) | 17.5 × 70 × 63 mm |
| Weight | approx. 0.059 kg |
| Operating temperature | -20 °C to +60 °C |
The ABB CT-SDD.22 is an electronic star-delta timer relay used to control automatic star-delta motor starting sequences.
The timer relay provides an adjustable timing range from 0.05 s to 10 min.
The CT-SDD.22 operates with a control supply voltage of 24–48 V DC and 24–240 V AC.
The ABB CT-SDD.22 provides two normally open relay contacts.
Yes, the CT-SDD.22 is designed for standard 35 mm DIN rail mounting.
ABB CT-D timer relays provide dependable timing control, compact installation and reliable switching performance for industrial motor control applications.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...