Why Choose the ABB CT-SDS.23P Star-Delta Timer?
The ABB CT-SDS.23P 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 ABB CT-S timer range, it provides a dedicated star-delta change-over function with two normally open relay outputs.
The CT-SDS.23P 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. A fixed 50 ms transition time provides the defined interval between the star and delta switching stages. :chatgpt-content-reference{index="0"}
With a rated control supply of 380–440 V AC, 2 n/o contacts and maintenance-free Easy Connect push-in terminals, the CT-SDS.23P is designed for straightforward integration into suitable motor control circuits. Its compact 22.5 mm wide DIN-rail housing and front-face adjustment support convenient installation and configuration. :chatgpt-content-reference{index="1"}
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.
- Designed for 380–440 V AC control supply applications.
- 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.
Key Features
- ABB CT-SDS.23P 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.
- 380–440 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.
- 3 LEDs for status indication.
- Tool-free DIN-rail mounting and removal.
Reliable Star-Delta Control for Industrial Automation
Star-delta timer relays are used in motor starting circuits where a suitable three-phase motor is initially connected in a star configuration before changing over to delta operation. The ABB CT-SDS.23P provides the timing function required to coordinate this sequence in suitable industrial motor control systems.
The CT-SDS.23P combines seven selectable timing ranges with a fixed 50 ms transition time and two normally open relay outputs. Its 380–440 V AC control supply, compact DIN-rail housing and push-in terminals make it suitable for integration into compatible control panels and automation equipment.
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.
