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P72x/EN IT/C21
Introduction
Page 6/10
MiCOM P721/P723
4.
INTRODUCTION TO THE MiCOM P721 & P723 PROTECTIONS
The range of MiCOM protection relays is built on the success of the MIDOS, K and MODN
ranges by incorporating the last changes in digital technology. Relays from the MiCOM P72x
range are fully compatible and use the same modular box concept.
MiCOM P721 and P723 high impedance differential protections provide differential protection
and high impedance differential protection (with P79x high impedance accessory) for
machines, power transformers and busbar installations as well as for other applications
where differential protection is required.
The P721 relay provides simple restricted earth current fault protection. Furthermore, P723
relay is used for 3-phases fault protection.
In addition to its protective functions, each relay offers control and recording features. They
can be fully integrated to a control system so protection, control, data acquisition and
recording of faults, events and disturbances can be made available.
The relays are equipped on the front panel with a liquid crystal display (LCD) with 2 x 16
back-lit alphanumerical characters, a tactile 7 button keypad (to access all settings, clear
alarms and read measurements) and 8 LEDs that indicate the status of MiCOM P721 and
P723 protections.
In addition, the use of the RS485 communication port makes it possible to read, reinitialise
and change the settings of the relays, if required, from a local or remote PC computer loaded
with MiCOM S1 software.
Its flexibility of use, reduced maintenance requirements and ease of integration allow the
MiCOM P72x range to provide an adaptable solution for the problems of the protection of
electric networks.
Summary of Contents for P721
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Page 4: ...P72x EN T C21 Technical Guide Contents Page 2 2 MiCOM P721 P723 BLANK PAGE...
Page 5: ...Pxxx EN SS G11 SAFETY SECTION...
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Page 15: ...Introduction P72x EN IT C21 MiCOM P721 P723 INTRODUCTION...
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Page 26: ...P72x EN IT C21 Introduction Page 10 10 MiCOM P721 P723 BLANK PAGE...
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Page 30: ...P72x EN IN C21 Handling Installation and Case Dimensions Page 2 10 MiCOM P721 P723 BLANK PAGE...
Page 39: ...User Guide P72x EN FT C21 MiCOM P721 P723 USER GUIDE...
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Page 78: ...P72x EN FT C21 User Guide Page 38 38 MiCOM P721 P723 BLANK PAGE...
Page 79: ...Menu Content Tables P72x EN HI C21 MiCOM P721 P723 MENU CONTENT TABLES...
Page 80: ...P72x EN HI C21 Menu Content Tables MiCOM P721 P723 BLANK PAGE...
Page 82: ...P72x EN HI C21 Menu Content Tables Page 2 8 MiCOM P721 P723 BLANK PAGE...
Page 89: ...Technical Data P72x EN TD A11 MiCOM P721 P723 TECHNICAL DATA...
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Page 108: ...P72x EN TD A11 Technical Data Page 18 18 MiCOM P721 P723 BLANK PAGE...
Page 109: ...Getting Started P72x EN GS C21 MiCOM P721 P723 GETTING STARTED...
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Page 135: ...Application Guide P12x EN AP C21 MiCOM P721 P723 APPLICATION GUIDE...
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Page 189: ...Communication database P72x EN CT A11 MiCOM P721 P723 COMMUNICATION DATABASE...
Page 190: ...P72x EN CT A11 Communication database MiCOM P721 P723 BLANK PAGE...
Page 192: ...P72x EN CT A11 Communication database Page 2 78 MiCOM P721 P723 BLANK PAGE...
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Page 268: ...P72x EN CT A11 Communication database Page 78 78 MiCOM P721 P723 BLANK PAGE...
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Page 298: ...P72x EN CM C21 Commissioning and Maintenance Page 28 28 MiCOM P721 P723 BLANK PAGE...
Page 299: ...Connection Diagrams P72x EN CO A11 MiCOM P721 P723 CONNECTION DIAGRAMS...
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Page 306: ...P72x EN RS A11 Commissioning Test Record Sheets Page 2 22 MiCOM P721 P723 BLANK PAGE...
Page 326: ...P72x EN RS A11 Commissioning Test Record Sheets Page 22 22 MiCOM P721 P723 BLANK PAGE...
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