P12y/EN AP/D32
Application Guide
Page 66/74
MiCOM P125/P126 & P127
7.
ROLLING AND PEAK VALUE DEMANDS (P126 & P127
The MiCOM P126 and P127 relays are able to store the 3 phases rolling average and
maximum subperiod values. The description and principle of calculation are given bellow.
7.1 Rolling
demand
The principle of the calculation of the rolling demand value for IA, IB and IC currents is
following:
•
Calculation of the average of the RMS values on a "Rolling Sub Period" period.
The setting of the width of the period "Rolling Sub Period" is in the "RECORDS/Rolling
Demand/Sub Period" menu.
Setting range: from 1 to 60 minutes.
•
Storage of these values in a sliding window
•
Calculation of the average of these average values (sliding window values) on the
number of "Num. of Sub Periods" periods
The setting of the number of Sub Period "Num of Sub Periods" in the "RECORDS/Rolling
Demand/Num of Sub Per" menu.
Setting range : from 1 to 24.
Display of the first result in the MEASUREMENTS menu only after the storage of "Num of
Sub Periods" periods. The 3 phases Rolling average value are
displayed :
•
Rolling Average IA RMS
Rolling Average IB RMS
Rolling Average IC RMS
The calculation is reset by either "hand Reset" (by key _ ) without use of password, or a
remote command.
NOTE
:
In case of loss of power supply the rolling demand are not stored.
A modification of the settings (either "Rolling Sub Period" or "Num of Sub Periods"
parameter) reset the calculation.
Example:
Sub Period = 5 mn
Num of Sub Period = 2
At the end of the Sub Period 2 :
Rolling average value = (average value 1 + average value 2)/2
At the end of the Sub Period 3 :
New Rolling average value = (average value 2 + average value 3)/2
Summary of Contents for MiCOM P125
Page 1: ...MiCOM P125 P126 P127 Directional Non directional Relay Technical Guide P12Y EN T E32...
Page 2: ......
Page 4: ...P12y EN T E32 Technical Guide Page 2 2 MiCOM P125 P126 P127 BLANK PAGE...
Page 5: ...Pxxxx EN SS B11 SAFETY SECTION...
Page 6: ......
Page 8: ...Pxxxx EN SS B11 Page 2 10 Safety Section BLANK PAGE...
Page 16: ...Pxxxx EN SS B11 Page 10 10 Safety Section BLANK PAGE...
Page 17: ...Getting Started P12y EN GS D32 MiCOM P125 P126 P127 GETTING STARTED...
Page 18: ......
Page 66: ...P12y EN GS D32 Getting Started Page 48 48 MiCOM P125 P126 P127 BLANK PAGE...
Page 68: ......
Page 79: ...User Guide P12y EN FT D32 MiCOM P125 P126 P127 USER GUIDE...
Page 80: ......
Page 166: ...P12y EN FT D32 User Guide Page 86 86 MiCOM P125 P126 P127 BLANK PAGE...
Page 167: ...Technical Data P12y EN TD D32 MiCOM P125 P126 P127 TECHNICAL DATA AND CHARACTERISTIC CURVES...
Page 168: ......
Page 197: ...Application Guide P12y EN AP D32 MiCOM P125 P126 P127 APPLICATION GUIDE...
Page 198: ......
Page 202: ...P12y EN AP D32 Application Guide Page 4 74 MiCOM P125 P126 P127 BLANK PAGE...
Page 274: ......
Page 298: ...P12y EN CM C22 Commissioning and Maintenance Page 24 24 MiCOM P125 P126 P127 BLANK PAGE...
Page 300: ......
Page 302: ...P12y EN CO C22 Connections and Wiring Diagrams Page 2 10 MiCOM P125 P126 P127 BLANK PAGE...
Page 310: ...P12y EN CO C22 Connections and Wiring Diagrams Page 10 10 MiCOM P125 P126 P127 BLANK PAGE...
Page 312: ......
Page 360: ...P12y EN RS D32 Commissioning Test and Record Sheet Page 48 48 MiCOM P125 P126 P127 BLANK PAGE...
Page 361: ......