MiCOM Line Differential Applications

MiCOM Line Differential Applications

P251 / P532

MiCOM P521 - Feeder Differential Protection Relays

MiCOM P521 provides high speed, two ended current differential unit protection of overhead lines and underground cables in applications such as ring mains and parallel feeders.

Models available: MiCOM P521

MiCOM P521 relay provides fast, efficient current differential protection. It is very flexible and can be applied to a wide range of power systems. Offering a variety of communications interface options, MiCOM P521 provides valuable local and remote back-up protection

Easergy™ MiCOM P532 - Line Differential Protection and Bay Control Device

Easergy MiCOM P532 provides a two-ended line differential protection function with all of the necessary protection communication interfaces.

Easergy MiCOM P532 is an inexpensive line differential protection device that features optional control functions for rapid and selective short-circuit and overload protection of cables and power lines. 

It provides a rapid three-stage differential protection system using a tripping characteristic with multiple knee points amongst the numerous supplementary functions. The optional control functions enable Easergy MiCOM P532 to control up to six switchgear units fitted to a bay panel, and to monitor their contact positions.

P541 / P542 / P543 / P544 / P545 / P546

Easergy MiCOM P54x - Line Differential Protection Relays

Easergy MiCOM P54x is designed for high performance overhead line and cable applications, it interfaces readily with the longitudinal (end to end) communications channels and has optional distance backup protection.

Models available:

  • MiCOM P541, P542, P543, P544, P545, P546

Easergy MiCOM P541-P546 series provides high-speed current differential unit protection. The P54x is designed for all overhead line and cable applications, as it interfaces readily with the longitudinal (end to end) communications channel between line terminals.

A full range of back-up protection is integrated. This enhances the dependability of the protection, as hot-standby elements (such as distance zones and overcurrent) can be brought into service whenever a signaling channel outage may occur.

Functions available for the different models of the Line Differential protection MiCOM range of relays

ANSI

Protection Function

P521

P530C

P532

P541

P542

P543

P544

P545

P546

P547

21

Distance

         

25

Check synchronizing

   

   

37

Loss of load / undercurrent

                   

46

Negative sequence overcurrent

 

   

49

Thermal overload

50/51N

Ground fault

50/51P

Phase overcurrent

50BF

Circuit breaker failure

59/27

Over / under voltage

 

   

64W

Wattmetric ground fault

 

   

67N

Ground fault directional

 

   

67N

Sensitive directional ground fault

   

   

67P

Phase directional

 

   

78

Power swing blocking

         

79

Auto-reclose

3 pole

3 pole

3 pole

 

3 pole

1/3 pole

1/3 pole

1/3 pole

1/3 pole

1/3 pole

81

Under / over frequency

   

   

87L

Line differential (terminal)

2

2

2

2/3

2/3

2/3

2/3

2/3

2/3

 

87L

Phase comparison

                 

CTS

CT supervision

       

TCS

Trip circuit supervision

 

2 breaker configuration

           

 

 

2nd harmonic restraint

 

Copper wire signaling

             

Direct / permissive inter tripping

 

FO signaling

 

In Zone transformer

   

 

PLC signaling

                 

SDH / Sonet networks

         

 

Vector compensation

   

 

Typical Catalog Numbers

Catalog Number

Description

Basic Version

P521A0GZ412DG0

Series 20 - Line differential Protection, P521 (24-250Vdc & 48-240Vac), 1/5A CT inputs, 5In/8Out (24-250 Vdc, 24-240Vac), 1300nm single-mode single channel, RS485, DNP

Standard Version

P54321RCBM0H98M

Series 40 - Line differential Protection, P543 (48-110Vdc), 1/5A CT inputs, 16In/14Out (user configurable voltage thresholds), 1300nm single-mode dual channel, 3xRJ-45, IEC61850, DNP3

Advanced Version

P54521RCBM0H98M

Series 40 - Line differential Protection, P545 (48-110Vdc), 1/5A CT inputs, 24In/32Out (user configurable voltage thresholds), 1300nm single-mode dual channel, 3xRJ-45, IEC61850, DNP3

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