# Selec 800Psr Phase Sequence Relay – Voltage Monitoring

The Selec 800Psr Phase Sequence Relay is crucial for monitoring and controlling phase sequence in electrical systems, ensuring reliable performance in industrial settings. This relay prevents equipment damage by quickly detecting phase abnormalities.

This device features a power-on delay of 200 ms and a response time of 200 ms. In the event of a phase failure where voltage drops below 154V Ac, the relay trips promptly, safeguarding the system. The **Selec 800Psr** offers a fixed operating range between 154 to 500V Ac.

-   **Fast Response Time:** Maximum 200 ms response to detect abnormalities.
-   **Wide Voltage Range:** Operates reliably between 280 to 520 Vac.
-   **Phase Failure Protection:** Trips when voltage drops below 154V Ac.
-   **Compact Design:** Lightweight at just 100 gm for easy installation.
-   **Phase Imbalance Tolerance:** Maintains a 30V tolerance for stable operation.

**Specifications:**  
Operating Voltage Supply: 280 to 520 Vac  
Power On Delay: 200 ms  
Response Time: Maximum 200 ms  
Phase Imbalance Tolerance: 30V  
Operating Range: 154 to 500V Ac  
VA Rating: 20Va  
Maximum Supply: 3Ø/3W No/5A, Nc/3A, 250V Ac, 50/60Hz  
Weight: 100 gm

Trust Selec's efficient design to keep your electrical systems running smoothly. Ideal for industrial and automation systems, the **Selec 800Psr Phase Sequence Relay** ensures secure and reliable operation. Contact Ram Automations for your automation needs.

For more information, contact us at [info@ramautomations.com](mailto:info@ramautomations.com)

## Details

- **Price:** 999.0 USD
- **Vendor:** Selec
- **Type:** Industrial Automation > Relays > Phase Sequence Relay
- **Tags:** 800Psr, automation components, industrial relay, phase failure protection, phase sequence relay, Selec, voltage monitoring

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Used | 999.00 USD | In stock |

## Images

- Selec 800Psr Phase Sequence Relay – Voltage Monitoring-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/selec-800psr-phase-sequence-relay)
> Updated: 2026-10-04