🔎 Key Specifications
- Model: Selec 800PSR
- Type: Phase Sequence Relay
- Function: Monitors three-phase supply for correct sequence and phase failure
- Operating Voltage: Typically 415 V AC (3-phase)
- Relay Output: SPDT (Single Pole Double Throw) contact for control switching
- Mounting: DIN rail or panel mounting (depending on variant)
- Indicators: LED indicators for correct sequence and fault conditions
- Protection: Prevents motor reversal and equipment malfunction due to wrong phase rotation
- Applications: Industrial automation, motor protection, HVAC systems, pumps, compressors
⚙️ Functional Description
- Phase Sequence Monitoring: Detects whether the three-phase supply is in the correct order (R-Y-B).
- Phase Failure Detection: Identifies missing or failed phases to avoid equipment damage.
- Relay Action: Provides output contact to control circuits, ensuring only correct sequence allows operation.
- Safety Assurance: Prevents reverse rotation of motors, which can cause mechanical damage.
✅ Advantages
- Compact Design: Easy to install in control panels.
- Reliable Protection: Safeguards motors and equipment from incorrect wiring or supply issues.
- Visual Indication: LED lights provide quick status feedback.
- Cost-Effective: Affordable solution compared to advanced monitoring systems.
⚠️ Considerations
- Limited Functionality: Focused only on phase sequence and phase failure; does not measure voltage imbalance or harmonics.
- Correct Installation Required: Must be wired properly to ensure accurate monitoring.
📍 Availability
At Jai Govinda Trade Link (JGTL), the Selec 800PSR is typically listed under electrical protection relays. It is supplied with GST-compliant invoices and catalog transparency, making it suitable for industrial buyers in India.
