Built For Lines That Demand Accuracy.
MiCOM P43x delivers adaptive distance protection with six-zone coverage and SOTF readiness for modern transmission networks.
Faults escalate fast.
Weak protection makes them worse.
Old relays miss swings, misjudge high-resistance faults, and slow down during voltage dips—leading to mis-ops and blind zones.
Limited distance zones
Inadequate zone coverage leads to protection blind spots on long transmission lines.
Slow fault capture
Delayed clearing during voltage dips causes severe grid instability and stress.
Poor event visibility
Lack of high-res recording makes root-cause analysis after a trip impossible.
Missed weak-infeed faults
Traditional logic fails to detect high-resistance faults in weak networks.
Meet MiCOM P43x
Smarter Detection. Faster Isolation.
MiCOM P43x becomes the anchor protection for transmission lines, cables, and mixed feeders. Six-zone adaptive coverage ensures every line stays visible and protected.
Engineered For
Protection Depth.
Modular hardware. Sharp measurement. Strong communication across modern transmission networks.
Distance multi-zone
Fast six-zone coverage with adaptive logic for mixed feeders.
PSB & Out-of-step
Identifies stable power swings from actual faults to prevent false trips.
SOTF Readiness
Switch-on-to-fault logic ensures safety during manual closing operations.
PRP/HSR Redundancy
High-availability seamless redundancy for zero-packet-loss communication.
Disturbance Insight
COMTRADE and precise event logs for deep post-fault forensics.
Arc Flash Safety
Optional integrated high-speed arc detection for personnel security.
Sharp Measurement. Reliable Logic.
Modular Build. High-end protection. Redundant Ethernet.
Where P43x Sets the Standard
Precision distance logic for transmission lines and railway power grids.
Transmission lines
Six-zone adaptive logic for overhead HV lines and underground cables.
Industrial Feeder
Robust handling of weak networks and high-resistance faults.
Rail Electrification
Specific distance logic tuned for electrified railway power grids.
Generation Bay
Safe power export for large solar, wind, and thermal generation plants.
Digital Substation
Redundant Ethernet HSR/PRP support for modernized grid architectures.
Smart Isolation
Fast fault clearance (25-45ms) to maintain total network stability.
Transmission lines
Six-zone adaptive logic for overhead HV lines and underground cables.
Industrial Feeder
Robust handling of weak networks and high-resistance faults.
Rail Electrification
Specific distance logic tuned for electrified railway power grids.
Generation Bay
Safe power export for large solar, wind, and thermal generation plants.
Digital Substation
Redundant Ethernet HSR/PRP support for modernized grid architectures.
Smart Isolation
Fast fault clearance (25-45ms) to maintain total network stability.
Distance Protection Tuned To
Your Network
From zone settings to logic — we configure P43x with precision
Relay Testing, Programming &
Configuration
Relay Testing, Programming & Configuration
- Coordination Studies
- Zone 6 Logic Calibration
- Site Verification
Built For
Power Reliability
Trusted across transmission & industrial sectors
Utilities & Grid
Transmission Lines
Industrial Plants
Rail Infrastructure
Complementary Protection.
Engineering and maintenance services for selective fault isolation.
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