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7
APPLICATION NOTES
Electrical InterMiCOM settings are contained within two columns; INTERMICOM COMMS and INTERMICOM CONF.
The INTERMICOM COMMS column contains all the settings needed to configure the communications, as well as the
channel statistics and diagnostic facilities. The INTERMICOM CONF column sets the mode of each command signal
and defines how they operate in case of signalling failure.
Short metallic direct connections and connections using fire-optic converters will generally be set to have the
highest signalling speed of 19200b/s. Due to this high signalling rate, the difference in operating time between the
direct, permissive, and blocking type signals is small. This means you can select the most secure signalling
command type (‘Direct’ intertrip) for all commands. You do this with the IM# Cmd Type settings. For these
applications you should set the IM# Fallback Mode to
Default
. You should also set a minimal intentional delay
by setting IM# FrameSyncTim to 10 msecs. This ensures that whenever two consecutive corrupt messages are
received, the command will immediately revert to the default value until a new valid message is received.
For applications that use Modem and/or multiplexed connections, the trade-off between speed, security, and
dependability is more critical. Choosing the fastest baud rate (data rate) to achieve maximum speed may appear
attractive, but this is likely to increase the cost of the telecommunications equipment. Also, telecommunication
services operating at high data rates are more prone to interference and suffer from longer re-synchronisation
times following periods of disruption. Taking into account these factors we recommend a maximum baud rate
setting of 9600 bps. As baud rates decrease, communications become more robust with fewer interruptions, but
overall signalling times increase.
At slower baud rates, the choice of signalling mode becomes significant. You should also consider what happens
during periods of noise when message structure and content can be lost.
●
In ‘Blocking’ mode, the likelihood of receiving a command in a noisy environment is high. In this case, we
recommend you set IM# Fallback Mode to
Default
, with a reasonably long IM# FrameSyncTim setting.
Set IM# DefaultValue to ‘1’. This provides a substitute for a received blocking signal, applying a failsafe for
blocking schemes.
●
In ‘Direct’ mode, the likelihood of receiving commands in a noisy environment is small. In this case, we
recommend you set IM# Fallback Mode to
Default
with a short IM# FrameSyncTim setting. Set IM#
DefaultValue to ‘0’. This means that if a corrupt message is received, InterMiCOM will use the default value.
This provides a substitute for the intertrip signal not being received, applying a failsafe for direct
intertripping schemes.
●
In ‘Permissive’ mode, the likelihood of receiving a valid command under noisy communications conditions is
somwhere between that of the ‘Blocking’ mode and the ‘Direct’ intertrip mode. In this case, we
recommended you set IM# Fallback Mode to
Latched
.
The table below presents recommended IM# FrameSyncTim settings for the different signalling modes and baud
rates:
Minimum Recommended "IM# FrameSyncTim" Setting
Baud Rate
Direct Intertrip Mode
Blocking Mode
Minimum Setting
(ms)
Maximum Setting
(ms)
600
100
250
100
1500
1200
50
130
50
1500
2400
30
70
30
1500
4800
20
40
20
1500
9600
10
20
10
1500
19200
10
10
10
1500
Chapter 16 - Electrical Teleprotection
P54A/B/C/E
338
P54xMED-TM-EN-1
Содержание P4A
Страница 2: ......
Страница 20: ...Contents P54A B C E xviii P54xMED TM EN 1 ...
Страница 27: ...CHAPTER 1 INTRODUCTION ...
Страница 28: ...Chapter 1 Introduction P54A B C E 2 P54xMED TM EN 1 ...
Страница 38: ...Chapter 1 Introduction P54A B C E 12 P54xMED TM EN 1 ...
Страница 39: ...CHAPTER 2 SAFETY INFORMATION ...
Страница 40: ...Chapter 2 Safety Information P54A B C E 14 P54xMED TM EN 1 ...
Страница 52: ...Chapter 2 Safety Information P54A B C E 26 P54xMED TM EN 1 ...
Страница 53: ...CHAPTER 3 HARDWARE DESIGN ...
Страница 54: ...Chapter 3 Hardware Design P54A B C E 28 P54xMED TM EN 1 ...
Страница 86: ...Chapter 3 Hardware Design P54A B C E 60 P54xMED TM EN 1 ...
Страница 87: ...CHAPTER 4 SOFTWARE DESIGN ...
Страница 88: ...Chapter 4 Software Design P54A B C E 62 P54xMED TM EN 1 ...
Страница 99: ...CHAPTER 5 CONFIGURATION ...
Страница 100: ...Chapter 5 Configuration P54A B C E 74 P54xMED TM EN 1 ...
Страница 120: ...Chapter 5 Configuration P54A B C E 94 P54xMED TM EN 1 ...
Страница 121: ...CHAPTER 6 CURRENT DIFFERENTIAL PROTECTION ...
Страница 122: ...Chapter 6 Current Differential Protection P54A B C E 96 P54xMED TM EN 1 ...
Страница 149: ...CHAPTER 7 AUTORECLOSE ...
Страница 150: ...Chapter 7 Autoreclose P54A B C E 124 P54xMED TM EN 1 ...
Страница 207: ...CHAPTER 8 CB FAIL PROTECTION ...
Страница 208: ...Chapter 8 CB Fail Protection P54A B C E 182 P54xMED TM EN 1 ...
Страница 219: ...CHAPTER 9 CURRENT PROTECTION FUNCTIONS ...
Страница 220: ...Chapter 9 Current Protection Functions P54A B C E 194 P54xMED TM EN 1 ...
Страница 244: ...Chapter 9 Current Protection Functions P54A B C E 218 P54xMED TM EN 1 ...
Страница 247: ...CHAPTER 10 VOLTAGE PROTECTION FUNCTIONS ...
Страница 248: ...Chapter 10 Voltage Protection Functions P54A B C E 222 P54xMED TM EN 1 ...
Страница 261: ...CHAPTER 11 FREQUENCY PROTECTION FUNCTIONS ...
Страница 262: ...Chapter 11 Frequency Protection Functions P54A B C E 236 P54xMED TM EN 1 ...
Страница 268: ...Chapter 11 Frequency Protection Functions P54A B C E 242 P54xMED TM EN 1 ...
Страница 269: ...CHAPTER 12 MONITORING AND CONTROL ...
Страница 270: ...Chapter 12 Monitoring and Control P54A B C E 244 P54xMED TM EN 1 ...
Страница 300: ...Chapter 12 Monitoring and Control P54A B C E 274 P54xMED TM EN 1 ...
Страница 301: ...CHAPTER 13 SUPERVISION ...
Страница 302: ...Chapter 13 Supervision P54A B C E 276 P54xMED TM EN 1 ...
Страница 312: ...Chapter 13 Supervision P54A B C E 286 P54xMED TM EN 1 ...
Страница 323: ...CHAPTER 14 DIGITAL I O AND PSL CONFIGURATION ...
Страница 324: ...Chapter 14 Digital I O and PSL Configuration P54A B C E 298 P54xMED TM EN 1 ...
Страница 336: ...Chapter 14 Digital I O and PSL Configuration P54A B C E 310 P54xMED TM EN 1 ...
Страница 337: ...CHAPTER 15 FIBRE TELEPROTECTION ...
Страница 338: ...Chapter 15 Fibre Teleprotection P54A B C E 312 P54xMED TM EN 1 ...
Страница 354: ...Chapter 15 Fibre Teleprotection P54A B C E 328 P54xMED TM EN 1 ...
Страница 355: ...CHAPTER 16 ELECTRICAL TELEPROTECTION ...
Страница 356: ...Chapter 16 Electrical Teleprotection P54A B C E 330 P54xMED TM EN 1 ...
Страница 366: ...Chapter 16 Electrical Teleprotection P54A B C E 340 P54xMED TM EN 1 ...
Страница 367: ...CHAPTER 17 COMMUNICATIONS ...
Страница 368: ...Chapter 17 Communications P54A B C E 342 P54xMED TM EN 1 ...
Страница 439: ...CHAPTER 18 CYBER SECURITY ...
Страница 440: ...Chapter 18 Cyber Security P54A B C E 414 P54xMED TM EN 1 ...
Страница 457: ...CHAPTER 19 INSTALLATION ...
Страница 458: ...Chapter 19 Installation P54A B C E 432 P54xMED TM EN 1 ...
Страница 469: ...5 2 CASE DIMENSIONS 60TE E01409 Figure 197 60TE case dimensions P54A B C E Chapter 19 Installation P54xMED TM EN 1 443 ...
Страница 471: ...CHAPTER 20 COMMISSIONING INSTRUCTIONS ...
Страница 472: ...Chapter 20 Commissioning Instructions P54A B C E 446 P54xMED TM EN 1 ...
Страница 513: ...CHAPTER 21 MAINTENANCE AND TROUBLESHOOTING ...
Страница 514: ...Chapter 21 Maintenance and Troubleshooting P54A B C E 488 P54xMED TM EN 1 ...
Страница 530: ...Chapter 21 Maintenance and Troubleshooting P54A B C E 504 P54xMED TM EN 1 ...
Страница 531: ...CHAPTER 22 TECHNICAL SPECIFICATIONS ...
Страница 532: ...Chapter 22 Technical Specifications P54A B C E 506 P54xMED TM EN 1 ...
Страница 558: ...Chapter 22 Technical Specifications P54A B C E 532 P54xMED TM EN 1 ...
Страница 559: ...APPENDIX A ORDERING OPTIONS ...
Страница 560: ...Appendix A Ordering Options P54A B C E P54xMED TM EN 1 ...
Страница 565: ...APPENDIX B SETTINGS AND SIGNALS ...
Страница 566: ...Appendix B Settings and Signals P54A B C E P54xMED TM EN 1 ...
Страница 790: ...Appendix B Settings and Signals P54A B C E B224 P54xMED TM EN 1 ...
Страница 835: ...APPENDIX C WIRING DIAGRAMS ...
Страница 836: ...Appendix C Wiring Diagrams P54A B C E P54xMED TM EN 1 ...
Страница 849: ......