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Schneider Micom P123 Directional overcurrent relay

Schneider Micom P123 Directional overcurrent relay
Schneider Micom P123 Directional overcurrent relay
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Product Code : P123 Overcurrent Relay
Brand Name : Schneider
Product Description

Schneider Micom P123 Directional and Non-Directional overcurrent protection relay

Schneider Micom P123 Numerical relay is part of MiCOM P12x,  a range of directional and non-directional overcurrent relays from single phase or earth fault up to the multifunctional three-phase P127 device with voltage protection functions. Models available: MiCOM P120, MiCOM P121, MiCOM P122, MiCOM P123, MiCOM P125, MiCOM P126, MiCOM P127

MiCOM P123 is housed in a compact 4U case in 20TE or 30TE widths, MiCOM P12x is fully withdrawable to facilitate easy and quick replacement. The dual-rated current input is powered by conventional 1A or 5A Current Transformers. A wide-range power supply allows a flexible auxiliary voltage to be applied from 24-250Vdc/48-240Vac. P122 also offers a compact case solution with reduced hardware and functionality where installation space is minimal.

Software features include 2 settings groups for quick switching between application configurations and customisable reflex automation, allowing logical AND, OR or NOT gates.

MiCOM P123 Numerical relay also includes a rear RS485 communication port with a variety of protocols; DNP3, IEC 60870-5-103, Modbus and Courier.

Main Characteristics: Schneider Micom P123 relay

range of product

MiCOM P123

device short name


relay application


protection type

Overcurrent ANSI code: 50/51
Recloser ANSI code: 79
Cold load pick-up
Earth fault ANSI code: 50G/51G
Lockout ANSI code: 86
Thermal overload protection ANSI code: 49RMS
Phase undercurrent ANSI code: 37
Breaker failure ANSI code: 50BF
Negative sequence overcurrent ANSI code: 46
Restricted earth fault ANSI code: 64REF

number of inputs

4 current input CT...X/5 A and X/1 A
5 discrete

number of outputs

9 discrete

communication port protocol

Modbus RTU
IEC 60870-5-103

[Us] rated supply voltage

24...250 V DC 19.2¦300 V
48...250 V DC 38.4¦300 V
48...240 V AC 38.4¦264 V

control and monitoring type

Circuit breaker/contactor control

network and machine diagnosis type

Fault recording
Event recording
Disturbance recording15 s

switchgear diagnosis type

Trip circuit supervision ANSI code: TCS

display type

Backlit LCD: 2 lines of 16 characters

discrete input voltage

24...250 V DC 19.2 V standard variant
48...250 V AC 19.2 V standard variant
48...250 V DC 105 V further option
48...250 V DC 77 V further option
48...250 V DC 154 V further option
48...240 V AC 105 V further option
48...240 V AC 77 V further option
48...240 V AC 154 V further option

communication port support



type of measurement




177 mm total:
157.5 mm embedded:



103 mm



270 mm total:
240 mm embedded:


device mounting


Our catalog of Schneider Micom Protection Relays provides leading and reliable protection and control for any network application. The latest Protection Relays also offer comprehensive security and dependability for your electrical grid, from overcurrent and arc protection to distance and differential protection of the transmission line. Our product range offers solid protection with advanced communications such as the IEC 61850 to give you peace of mind in protecting your grid.


Office No.-9, Plot 53/54, Sector-34, Space Heights, Near Tawa Hotel, Kamothe, Navi Mumbai - 410209, Maharashtra, India
Mr Piyush Lalchand Rathi (Partner)
Mobile :+919819614841, +919769207841
Mr. Dnyanesh Gawande (Partner)
Mobile :+919833686249