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Micom Manuals
Protection Device
P721
Technical manual
Micom P721 Technical Manual
High impedance differential protection
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Contents
Table of Contents
Bookmarks
Table of Contents
Standard Safety Statements and External Label Information for Schneider Electric Equipment
Table of Contents
1 Introduction
Equipment
2 Health and Safety
3 Symbols and External Labels on the Equipment
4 Installing, Commissioning and Servicing
Labels
Symbols
5 Decommissioning and Disposal
Environment
Installation Category
Protective Class
Protective Fuse Rating
6 Technical Specifications for Safety
Communication Database P72X/En Ct/A11 Page 49/78
Link Layer
Physical Connection and Link Layer
General Interrogation
Initialisation
Message Validity Check
Spontaneous Events
Time Synchronisation
Blocking of Monitor Direction
Commands
Cyclic Measurements
Disturbance Records
Appendix
Spontaneous Messages Managed by Micom P72X
List of Data Contained in General Interrogation
Processed Commands
Cyclic Messages (Class 2 - Measurements)
Relay Re Initialization
IEC870-5-103 Messages for Disturbance Record Extraction
Commissioning and Maintenance P72X/En CM/C21 Page 1/28
1 Requirements Prior to Commissioning
Additional Commissioning Test Equipment
2 Commissioning Test Environment
Commissioning Test Sheets
Communication
Important Notes
Injection Test Sets
Current Transformers (Cts)
Earthing
Electrostatic Discharge (ESD)
3 Product Verification Tests
Visual Inspection
Auxiliary Supply
Logic Inputs
Logic Outputs
RS 485 Rear Communication
Measurements
Micom P721
Micom P723
4 Setting Check
Settings
Phase Differential Proteciton ([87] Threshold I Diff])
Test Wiring Diagram
Micom Settings
[87] Threshold I Diff with Fourier Mode
[87] Threshold I Diff with Fast Mode
[87] Threshold I Diff with Sample Mode
Earth Differential Protection ([87N] Threshold I Diff)
Test Wiring Diagram
Micom Settings
[87N] Threshold I Diff with Fourier Mode
[87N] Threshold I Diff with Sample Mode
Micom Settings
Phase Bus Wire Supervision ([95] Phase Bus-Wire Sup)
Test Wiring Diagram
[87N] Threshold I Diff with Fast Mode
[95] Threshold I Sup with Fourier Mode
[95] Threshold I Sup with Sample Mode
95] Threshold I Sup with Fast Mode
Correct Set up Check
Earth Bus Wire Supervision ([95N] Earth Bus-Wire Sup)
REF/BEF Primary Injection Tests
Busbar Primary Injection Tests
Final Checks
Equipment Failure
5 Maintenance
Major Fault
Minor Fault
Hardware and Software Faults
Method of Repair
Replacing the Active Part
Replacing the Complete Relay
Communication
Password Lost or Not Accepted
Problem Solving
Commissioning Test & Record Sheets P72X/En Rs/A11 Micom P721/P723 Page 1/22
1 Commissioning Test Sheets
Commissioning Test Record
Relay Identification
2 Commissioning Setting Record Sheets
CONFIGURATION Menu
Connection Menu
OP PARAMETERS Menu
Group Select Configuration
Leds 5 to 8 Configuration
Alarms Configuration
Inputs Configuration
Relays Maintenance
COMMUNICATION Menu
Phase Differential Protection (P723 Only)
PROTECTION G1 Menu
[87N] Earth Differential Protection
[95N] Earth Bus-Wire Supervision
Phase Bus-Wire Supervision (P723 Only)
PROTECTION G2 Menu
Phase Bus-Wire Supervision (P723 Only)
Phase Differential Protection (P723 Only)
Circuit Breaker Failure
LOGIC INPUT Allocation
Logic Equations
Disturbance Record
FAULT RECORD Record
INSTANTANEOUS Record
RECORDING Menu
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MiCOM P721 & P723
High Impedance Differential Protection
P72x/EN T/C21
Software Version 11.D
Technical Guide
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Chapters
Standard Safety Statements and External Label Information for Schneider Electric Equipment
7
Communication Database P72X/En Ct/A11 Page 49/78
239
Commissioning and Maintenance P72X/En CM/C21 Page 1/28
271
Commissioning Test & Record Sheets P72X/En Rs/A11 Micom P721/P723 Page 1/22
305
Table of Contents
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