Description
The GEYA GRT8-ST Star Delta Timer Relay is designed to manage the timing sequence used when starting three-phase motors with a star-delta starter. It helps control the initial star connection and the subsequent changeover to delta operation through a connected contactor circuit.
The relay has adjustable timing controls and LED indicators for monitoring its operating status. Its compact, single-module housing fits standard DIN rails, making it suitable for installation inside industrial electrical control panels.
Key Features
– Star-delta timing control: Designed for timed star-to-delta motor starting.
– Adjustable starting delay: The star timing range is 0.1 seconds to 10 minutes.
– Adjustable changeover interval: The documented transition interval is 0.1 to 1 second.
– LED status indication: Green indicates supply status and red indicates output status.
– Two changeover contacts: Features 2 × SPDT relay outputs.
– DIN-rail mounting: Compact, single-module design.
– Multiple supply versions: Available in different voltage configurations depending on the model suffix.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | GEYA |
| Model | GRT8-ST |
| Product Type | Star-Delta Timer Relay |
| Main Function | Timed Star-Delta Motor Starting |
| Star Timing Range | 0.1 Seconds–10 Minutes |
| Changeover Interval | 0.1–1 Second |
| Output Contacts | 2 × SPDT |
| Rated Current | 16A, AC-1 Utilization Category |
| Supply Options | AC 230V or AC/DC 12–240V, Depending on Variant |
| Mounting | DIN Rail |
| Front Protection | IP40 |
| Terminal Protection | IP20 |
| Dimensions | Approximately 90 × 18 × 64 mm |
Industrial Applications
The GEYA GRT8-ST can be used in:
– Three-phase motor control panels
– Star-delta motor starter circuits
– Industrial pumps and fans
– Compressor control systems
– Machinery requiring timed motor starting
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