Why Choose the ABB CT-SDS.22P Star-Delta Timer?
The ABB CT-SDS.22P is a reliable electronic star-delta timer relay designed for controlled motor starting and switching in industrial automation, motor control panels and electrical control systems. As part of the proven ABB CT-S timer range, it provides a dedicated star-delta change-over function with two normally open relay outputs.
The CT-SDS.22P provides 7 selectable time ranges from 0.05 s to 10 min, allowing the star-to-delta transition to be configured for the requirements of the motor and application. It also provides a fixed 50 ms transition time between the star and delta switching stages, helping coordinate controlled motor starting.
With a rated control supply of 24–48 V DC / 24–240 V AC, 2 n/o contacts and Easy Connect push-in terminals, the CT-SDS.22P is designed for straightforward integration into motor control and automation panels. Its compact 22.5 mm DIN-rail housing and front-face adjustment provide convenient installation and configuration.
Key Advantages
- Reliable star-delta timer relay for motor control applications.
- 7 selectable time ranges from 0.05 s to 10 min.
- Fixed 50 ms star-to-delta transition time.
- Wide 24–48 V DC / 24–240 V AC control supply.
- 2 n/o relay contacts for star-delta switching control.
- Maintenance-free Easy Connect push-in terminals simplify installation.
- Compact 22.5 mm wide DIN-rail housing for control cabinets.
Key Features
- ABB CT-SDS.22P star-delta timer relay.
- Dedicated star-delta change-over function.
- 7 selectable time ranges.
- 0.05 s to 10 min timing range.
- Fixed 50 ms transition time.
- 24–48 V DC / 24–240 V AC rated control supply.
- 2 n/o relay contacts.
- Relay contacts rated at 250 V / 4 A.
- Maintenance-free Easy Connect push-in terminals.
- Precise timing adjustment through front-face operating controls.
- Compact 22.5 mm wide housing.
- Three LEDs provide indication of operational states.
- Tool-free DIN-rail mounting and removal.
Reliable Star-Delta Motor Control for Industrial Automation
Star-delta timer relays such as the ABB CT-SDS.22P are designed for motor starting applications where a motor is initially connected in a star configuration before transitioning to delta operation. This starting method can help control the starting conditions of suitable three-phase motors and is widely used in industrial motor control systems.
The CT-SDS.22P provides seven selectable timing ranges and a fixed 50 ms transition time, allowing the star-to-delta sequence to be configured for the application. Its two normally open relay outputs provide the switching signals required for star-delta control circuits, while the compact DIN-rail housing and push-in terminals support efficient panel installation.
Typical Applications
- Three-phase motor starting circuits.
- Star-delta motor control panels.
- Industrial automation and motor control systems.
- Machine tools and production machinery.
- Pumps, fans and compressors with suitable star-delta motor arrangements.
- Conveyor and material-handling equipment.
- OEM machinery and industrial control equipment.
- Motor sequencing and electrical control applications.
