Description
1. At-A-Glance Executive Brief
- Model: CM-MPN.52S (1SVR750487R8300)
- Brand: ABB
- Part Type: Three-Phase Voltage Monitoring Relay
- System Compatibility: Industrial Control Panels / Motor Control Centers
- Lifecycle Status: Active
- Weight: 0.18 kg
2. Technical Introduction
A sudden phase loss or voltage asymmetry on a heavy industrial feeder can instantly burn out expensive motor windings and bring production lines to a standstill. The ABB CM-MPN.52S (1SVR750487R8300) operates as a multi-functional three-phase monitoring relay designed to continuously check phase sequence, phase failure, over-voltage, and under-voltage conditions. Plant electrical teams integrate this DIN-rail mounted device into control panels to intercept power supply anomalies before they reach sensitive rotating equipment or power distribution hardware.
3. Core Technical Specifications
- Manufacturer: ABB
- Part Number: 1SVR750487R8300
- Catalog Designation: CM-MPN.52S
- Rated Control Supply Voltage: 200–500 V AC
- Monitoring Functions: Phase failure, phase sequence, over/under-voltage, phase unbalance
- Output Contacts: 2 c/o (SPDT) contacts
- Terminal Technology: Screw connection technology
- Mounting Style: DIN Rail (IEC/EN 60715)
- Country of Origin: Germany
- Unit Weight: 0.18 kg
4. Field Engineer’s Tech Notes
- Threshold Adjustments: Always verify the trip thresholds for over-voltage and under-voltage match the specific operational tolerances of the downstream loads. Setting parameters too tight in plants with weak utility grids will trigger nuisance tripping and halt process operations.
- Auxiliary Supply Wiring: Ensure the three-phase line voltage is correctly terminated to the designated input terminals without crossing phases. Miswiring during initial panel hookup will latch the output relay in a fault state and prevent system startup.
5. Adaptive QA & Testing Protocol
Every unit undergoes rigorous electrical bench validation prior to warehouse dispatch. Testing involves multi-voltage phase injection to verify precise trip thresholds for phase loss, unbalance, and over/under-voltage parameters, alongside output contact actuation checks. Complete test documentation and inspection verification reports can be provided upon request to satisfy your facility’s internal quality standards.
6. Buyer’s FAQ
- What is the standard warranty coverage for this part? This component includes a comprehensive 12-month operational warranty from the date of invoice.
- Are these units supplied as new surplus or refurbished? We stock verified New Surplus (NSFP) and certified OEM parts, stored in climate-controlled environments to prevent component degradation.
- What is the typical shipping speed for emergency plant outages? Parts stocked in our global distribution hubs ship same-day via priority air freight to eliminate unnecessary plant downtime.
- Is this part an exact drop-in replacement for older revisions? Yes, part number 1SVR750487R8300 maintains strict form, fit, and wiring terminal compatibility with preceding CM-series relay iterations.
