ABB CM-PVS 1SVR430794R3300 Voltage Monitoring Relay

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Product Overview

The ABB CM-PVS three-phase monitoring relay, such as part number 1SVR730794R3300 (CM-PVS.41S), is a voltage monitoring relay designed to supervise three-phase power supplies. It continuously monitors critical parameters such as overvoltage, undervoltage, phase loss, and phase sequence. When abnormal conditions are detected, it triggers relay outputs for alarm or control actions.

Key Technical Specifications

• Model: 1SVR730794R3300 (CM-PVS.41S) empower.abb.com

• Measuring/Operating Voltage: 3 × 300 … 500 V AC (phase-to-phase) TME

• Frequency Sensing Range: 45 Hz to 65 Hz datasheets.globalspec.com

• Output Contacts: 2 c/o (SPDT / DPDT) datasheets.globalspec.com

• Trip Delay: 0.1 s to 30 s (adjustable) or 0 s; with startup delay ~200 ms empower.abb.com

• Phase Sequence Monitoring: Supported (can be enabled or disabled) electricautomationnetwork.com

• Phase Failure Detection: Supported empower.abb.com

• Measurement Principle: True RMS datasheets.globalspec.com

• Status Indication: 3 LEDs for operational/fault status datasheets.globalspec.com

• Terminal Type: Screw terminals empower.abb.com

• Operating Temperature: –25 °C to +60 °C electricautomationnetwork.com

• Storage Temperature: –40 °C to +85 °C empower.abb.com

• Rated Contact Capacity: Max output circuit 300 V AC; contact rating B300 empower.abb.com

• Dimensions: 22.5 mm width × 85.6 mm height × 103.7 mm depth empower.abb.com

• Weight: ~0.139 kg electricautomationnetwork.com

• Mounting: DIN rail (e.g., TH35) electricautomationnetwork.com

• Approvals: CE (among others) electricautomationnetwork.com

Advantages & Features

1. Wide Voltage Monitoring Range – Supports 300–500 V phase-to-phase, suitable for various three-phase supply systems.

2. Comprehensive Fault Detection – Detects overvoltage, undervoltage, phase loss, and incorrect phase sequence, offering broad protection.

3. Adjustable Delay Function – Delay time can be set to avoid nuisance trips, with both ON-delay and OFF-delay options.

4. Accurate Measurement – Uses True RMS measurement for reliable detection under varying load / voltage conditions.

5. Dual Relay Outputs – Two change-over contacts allow separate logic for alarm and control or redundant safety paths.

6. Status LEDs – Three LEDs indicate normal or fault conditions, facilitating troubleshooting and maintenance.

7. Compact Footprint – Only 22.5 mm wide, saving space in control panels.

8. Robust Temperature Tolerance – Operates reliably in –25 °C to +60 °C environments.

9. Mature & Well-Supported – Commonly used ABB series with good spare parts and support ecosystem.

Typical Application Fields

• Industrial control panels and distribution boards for monitoring power quality.

• Motor control systems (e.g., to detect phase loss or wrong phase sequence).

• Transformer stations and sub-distribution systems.

• Power generation (including renewable energy) to protect against voltage abnormalities.

• Building automation systems for stable power supply supervision.

• Rail / transportation systems (if compatible with operational standards).

Precautions / Usage Notes

1. Wiring Accuracy: Ensure correct wiring of L1, L2, L3 to the measuring terminals; loose terminals may lead to false trips.

2. Delay Settings: Adjust the trip delay based on system dynamics to avoid nuisance or missed trips.

3. Status Monitoring: After installation, verify LED behaviour under both normal and fault conditions.

4. Ambient Conditions: Make sure the installation site stays within the specified temperature range.

5. Maintenance: Regularly inspect and tighten terminal connections and clean dust to ensure reliable contact.

6. Redundancy: For critical systems, consider redundant monitoring relays or backup logic.

7. Control Logic Integration: Design alarm / stop / fallback logic in your PLC / SCADA to respond appropriately to relay outputs.

8. Life Cycle & Availability: Check whether the specific part is still in production (or replaced) and ensure spare parts are available for long-term maintenance.

The structure and details of the product：

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