Description
ABB PM633 – Product Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | PM633 |
| Manufacturer | ABB |
| Product Category | Protection Relay |
| Input Voltage | 24-48V DC / 100-240V AC (±20%) |
| Current Inputs | 1A or 5A (configurable) |
| Protection Functions | Overcurrent, Earth Fault, Motor Protection |
| Communication | IEC 61850, Modbus, DNP3.0, PROFIBUS |
| Operating Temperature | -25°C to +55°C |
| Protection Class | IP40 (front), IP20 (terminals) |
| Dimensions (W×H×D) | 177 × 190 × 155 mm |
| Weight | 2.2 kg |
| Compliance Standards | IEC 60255, IEEE C37.90, UL 508 |
ABB PM633
Product Introduction
The ABB PM633 is a multifunctional protection relay designed for medium-voltage applications in industrial and utility power systems. Part of ABB’s Relion® 600 series, this intelligent electronic device (IED) provides comprehensive protection for motors, feeders, and transformers, ensuring safe and reliable operation in demanding electrical networks.
The PM633 combines advanced protection algorithms with real-time monitoring, making it ideal for applications requiring precise fault detection and fast tripping. Its modular design allows flexible configuration, while multiple communication protocols (IEC 61850, Modbus, DNP3.0) ensure seamless integration into SCADA and automation systems. The PM633 is widely used in oil & gas, mining, water treatment, and power distribution, where equipment protection and personnel safety are critical.
Core Advantages and Technical Highlights
Advanced Protection Features:
Directional/non-directional overcurrent (50/51, 50N/51N)
Thermal overload protection (49) with cooling time constants
Motor start/stall protection
Negative sequence current detection for phase unbalance
High-Speed Communication & Integration:
IEC 61850 Ed.2 for digital substation compatibility
Modbus TCP/RTU and DNP3.0 for SCADA connectivity
PROFIBUS DP for industrial automation networks
GOOSE messaging for fast peer-to-peer tripping
Robust Industrial Design:
Wide operating temperature (-25°C to +55°C)
4kV surge immunity (IEC 61000-4-5)
Vibration-resistant (5g) and shock-proof
Conformal coated PCB for harsh environments
User-Friendly Interface:
High-resolution LCD with intuitive navigation
10 programmable LEDs for status indication
Local pushbuttons for manual control
USB port for firmware updates and configuration
Typical Application Scenarios
The ABB PM633 is deployed in:
Oil & Gas:
Motor protection for pumps and compressors
Feeder protection in offshore platforms
Mining & Heavy Industry:
Conveyor belt motor protection
Crusher and grinding mill protection
Water & Wastewater:
Pump station protection
HV motor monitoring
Power Distribution:
Transformer and feeder protection
Renewable energy integration (solar/wind farms)
Its fast tripping (<20ms) and adaptive protection settings make it ideal for critical infrastructure where downtime must be minimized.
ABB PM633
Related Model Recommendations
| Model | Description |
| PM630 | Basic protection relay (fewer functions) |
| PM635 | Enhanced version with arc flash detection |
| PM640 | Advanced motor protection relay |
| REF615 | Feeder protection relay (similar form factor) |
| REM615 | Motor protection variant |
Installation, Commissioning & Maintenance
Installation Preparation:
Verify power supply compatibility (24-48V DC or 100-240V AC).
Mount on DIN rail or panel with 50mm clearance for ventilation.
Use shielded cables for CT/PT connections to prevent noise interference.
Maintenance Recommendations:
Test protection settings annually via primary injection.
Check terminal tightness every 6 months.
Update firmware using ABB’s PCM600 software.
Replace cooling fans (if applicable) every 5 years.
Service & Guarantee Commitment
ABB provides:
60-month warranty (extendable options available)
24/7 global technical support
Firmware updates & cybersecurity patches
On-site commissioning & training
10-year spare parts availability
The PM633 undergoes:
Environmental stress testing (-40°C to +85°C)
EMC immunity validation (IEC 61000-4-5)
Mechanical vibration & shock testing
