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How Industries can Take advantage of The Functions & Features of Schneider Micom P441 Full Scheme Distance Protection relays

Schneider P441

Schneider P441, P442 & P444 is a numerical full scheme distance relays specially built by one of the most trusted brands Schneider to provide flexible, reliable, protection, monitoring, and control of transmission lines. Schneider micom relays are a multifunction product and can be easily applied to a wide range of overhead lines as well as underground cables and this device is best suitable for high voltage systems. The device is patented and is based on a proven algorithm with decades of established field experience in energy and automation digital solutions. The Schneider Micom P441 Full Scheme Distance Protection relays offers its users a combination of speed, security, and selectivity for multiple electrical power system faults.

The device is integrated with a wide range of communication options this helps with the efficient connection of the relay to any type of Digital Control System as well as SCADA. The optional redundant Ethernet board provided with P442 and P444 helps in reducing the expenditure of ownership as these relays are natively embedded with the switchboard. This can help users in reducing the number of stand-alone switches required and will reduce the cost of wiring, power supply as well as maintenance costs. These devices also have the functionality to help in increasing the availability rate and decrease the risk of electric outages

APPLICATION of Schneider P441 Relay

Schneider P441 Relay, P442, and P444 are designed and developed by Schneider according to user requirements for complete distance protection of different applications of the power system such as lines, tapped lines, and lines with multiple zero-sequence sources, cables, non-homogeneous lines, parallel lines, and series compensated lines. The device provides complete independent settable resistive reach per zone allowing an effortless application to short lines and cable protection. All products in the MICOM psoriasis are patented built with the latest techniques and allow full use of digital memory, the relays can also be applied in situations that can cause a distance implementation to fault operation like cross-country faults, close-up faults, etc. The Schneider P441 Relay, P442, and P444 by Schneider are integrated with multiple channel aided scheme logic, with supplementary and backup protection. It provides complete protection to solidly earthed systems starting from distribution up to transmission voltage levels. The comes with Three-phase tripping with faulted phase indication for all protection functions.

The Function of Schneider P441 Relay

  • Power swing blocking to prevent any unwanted operation during power swings.
  • ((SOTF/TOR)The Switch-On-To-Fault and Trip On Reclose protection) offer fast fault clearance following both manual and auto-reclosing of circuit breakers.
  • ((VTS/CVTS) VT/CVT Supervision) helps in Supervising and detecting loss of one-phase, two-phase & three-phase of the VT signal, it also offers indication and inhibition of voltage-dependent protection elements.
  • (Circuit supervision) Continuous supervision of the trip circuit with Thermal Overload.
  • ((Cts) Current transformer supervision)to detect loss of phase CT signals and inhibit the operation of current dependent protection elements.
  • ((LBB) Circuit breaker failure protection) Circuit breaker failure protection can be used for back tripping upstream circuit breakers, and /or for re-tripping through a second breaker trip coil when a local breaker failure is detected. 
  • (fault location) the algorithm, immune to fault resistance and load current, delivers distance to fault in miles, ohms, and percentage of line. A mutual compensation feature is equipped to eliminate the effect of zero sequence mutual coupling from the parallel lines
  • (CB Condition Monitoring) The circuit breaker condition monitoring help in Monitoring the number of breaker trip operations per phase

The hardware of Schneider P441 Relay

  • A back-lit liquid crystal display (3 lines), 12 LEDs (8 programmable) An optional IRIG-B port (not P441), RS232 port & an RS485 port, RS232, RS485, and K-Bus port
  • A download/monitor port,  battery (supervised) with N/O & N/C watchdog contacts, and Supervised +48V field voltage
  • 1A/5A dual rated CTs, IEC 61850-9.2, IEC 61850-8-1: Px4x devices can be enhanced with an optional redundant Ethernet board. 
  • Self Healing Protocol and Dual Homing Protocol 
  • (Rapid Spanning Tree) RSTP protocol is also provided. 
  • The redundant Ethernet board has modulated, demodulated IRIG-B with the SNTP protocol for time synchronization. 
  • A watchdog relay contact in redundant Ethernet board to set alarms in case of a failure.
  • The Opto-inputs, relay outputs, and 8 of the LEDs can be changed by the user. 
  • The universal voltage range from 24 to 250V dc is independent and can be powered from the 48V field voltage available from the device. 
  • The relay output is latching or self-reset


We Digital & Smart Grid Enterprises are the leading Schneider p441 relay exporter and reliable Numerical Full Scheme Distance Relays dealer in Maharashtra. We also deliver a wide range of services & customized solutions for many leading Industries & Panel Builders. For more info, you can reach us at +917021624024 or mail us at info@dsgenterprises.in. We also deal in a broad range of products in MiCOM. Please click here if you would like to know more about Schneider Micom relays.