Distance Protection That Sees Farther.
MiCOM P44x delivers fast, accurate multi-zone protection for lines and cables — built to secure transmission networks with precision and scheme-ready intelligence.
On Long Lines,
Tiny Faults Trigger Big Failure.
Aging relays misjudge zones and struggle with swings. One wrong trip can ripple across the entire grid, causing cascading outages.
Unstable zone reach
Aging relays misjudge distances, leading to loss of selectivity on long lines.
Slow weak-fault detection
Traditional logic struggles with poor CT signals and high-resistance faults.
No swing discrimination
Inability to differentiate between grid swings and faults causes nuisance trips.
Breaker supervision gaps
Lack of two-stage failure monitoring risks hardware damage during clearing.
Limited recording depth
Inadequate disturbance recording makes post-fault grid analysis impossible.
Meet MiCOM P44x
— Precision distance protection for modern grids.
The P44x family (P442 / P444) delivers full-scheme distance protection with six configurable zones and powerful quadrilateral characteristics. Secures overhead lines and cables with advanced PSL and deep recording.
Protection That Follows
Every Contour.
Direction, sensitivity and stability — engineered for complex line behavior on every network type.
Six-zone distance protection
Full-scheme Quadrilateral 21P/21G schemes built for every line topology.
Swing-proof stability
Advanced power swing blocking and out-of-step protection to avoid false trips.
Stronger weak-fault detection
Channel-aided DEF and sensitive ground logic catch high-impedance faults.
Smarter backup layers
Directional O/C, earth fault, thermal, voltage, frequency and broken conductor logic.
Total breaker supervision
Integrated two-stage breaker failure and continuous trip-circuit monitoring.
Full visibility, deeper insights
Native COMTRADE waveforms, SOE, and disturbance records at the relay level.
Built For Precision. Tuned For Distance Accuracy.
Every module built to meet high-performance line protection standards
Where MiCOM P44x Proves Essential
Any line. Any compensation. Any network condition.
Transmission Lines
Full-scheme protection for overhead HV lines with six-zone logic.
Underground Cables
Thermal and sensitive fault handling for high-capacitance power cables.
Series-Compensated Lines
Stable distance logic for lines with capacitive series compensation.
Parallel & Multi-Terminal
Advanced coordination for complex parallel circuits and multi-terminal lines.
Tapped Feeders
Reliable protection for tapped distribution lines with weak infeed points.
Substation Automation
Integrated bay control and GOOSE logic for smart digital substations.
Transmission Lines
Full-scheme protection for overhead HV lines with six-zone logic.
Underground Cables
Thermal and sensitive fault handling for high-capacitance power cables.
Series-Compensated Lines
Stable distance logic for lines with capacitive series compensation.
Parallel & Multi-Terminal
Advanced coordination for complex parallel circuits and multi-terminal lines.
Tapped Feeders
Reliable protection for tapped distribution lines with weak infeed points.
Substation Automation
Integrated bay control and GOOSE logic for smart digital substations.
Distance Protection Configured
With Precision
We test, parameterize and validate P44x schemes for every line type
Switchyard Complete Testing,
Commissioning & Maintenance
Technical Implementation
- Circuit Breaker Overhauling & Testing
- HT & LT Panel Maintenance
- Relay Testing & Configuration
Designed For Transmission.
Trusted Across Distribution.
Ideal for utilities, industries and any network relying on line protection.
Transmission utilities
Distribution companies
Industrial networks
Renewable evacuation lines
Critical infrastructure feeders
Smart grid projects
Complementary Solutions.
Compatible protection, control and communication solutions designed to work with MiCOM P44x.
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