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RED650 first page preview

RED650

Brand: ABB | Category: Protection Device
Table of contents
  1. Table Of Contents
  2. Table Of Contents
  3. Table Of Contents
  4. Table Of Contents
  5. Table Of Contents
  6. Table Of Contents
  7. Table Of Contents
  8. Table Of Contents
  9. Table Of Contents
  10. Table Of Contents
  11. Table Of Contents
  12. Table Of Contents
  13. Table Of Contents
  14. Table Of Contents
  15. Table Of Contents
  16. Table Of Contents
  17. Table Of Contents
  18. Table Of Contents
  19. Table Of Contents
  20. Table Of Contents
  21. Table Of Contents
  22. Table Of Contents
  23. Table Of Contents
  24. Table Of Contents
  25. Table Of Contents
  26. Table Of Contents
  27. Table Of Contents
  28. Table Of Contents
  29. Table Of Contents
  30. Section 1 Introduction
  31. Intended audience
  32. Document revision history
  33. Document symbols and conventions
  34. Document conventions
  35. Section 2 Available functions
  36. Back-up protection functions
  37. Communication
  38. Basic IED functions
  39. Section 3 Analog inputs
  40. Signals
  41. Settings
  42. Monitored data
  43. Operation principle
  44. Technical data
  45. Section 4 Binary input and output modules
  46. Setting parameters for binary input modules
  47. Section 5 Local Human-Machine-Interface LHMI
  48. Basic part for LED indication module
  50. LCD part for HMI function keys control module
  53. Keypad
  54. Display
  55. LEDs
  56. LED configuration alternatives
  57. Function keys
  58. Line differential protection
  59. Analog signal transfer for line differential protection
  60. Function block
  64. Time synchronization
  65. Analog signal communication for line differential protection
  66. Open CT detection feature
  67. Binary signal transfer
  69. Distance protection ZMFPDIS
  75. Filtering
  76. Phase-selection element
  77. Directional criteria
  78. Fuse failure
  79. Load encroachment
  80. Simplified logic schemes
  81. Measurement
  83. Power swing detection ZMRPSB
  86. Resistive reach in forward direction
  87. Resistive reach in reverse direction
  88. Reactive reach in forward and reverse direction
  89. Operating and inhibit conditions
  91. Functionality
  95. Instantaneous phase overcurrent protection PHPIOC
  104. Instantaneous residual overcurrent protection EFPIOC
  107. Directional residual overcurrent protection, four steps EF4PTOC
  111. Internal polarizing
  112. External polarizing for earth-fault function
  113. Directional supervision element with integrated directional comparison function
  114. Second harmonic blocking element
  115. Switch on to fault feature
  117. Thermal overload protection, one time constant, Celsius Fahrenheit LCPTTR/LFPTTR
  126. Pole discordance protection CCPDSC
  129. Pole discordance signaling from circuit breaker
  131. Two step undervoltage protection UV2PTUV
  135. Measurement principle
  136. Blocking
  137. Design
  139. Two step overvoltage protection OV2PTOV
  146. Two step residual overvoltage protection ROV2PTOV
  153. Underfrequency protection SAPTUF
  156. Voltage dependent time delay
  159. Overfrequency protection SAPTOF
  168. Current circuit supervision CCSSPVC
  175. Delta current and delta voltage detection
  176. Dead line detection
  177. Main logic
  179. Synchrocheck, energizing check, and synchronizing SESRSYN
  183. Logic diagrams
  185. SMBRREC
  189. Description of the status transition
  190. Functional sequence description
  191. Time sequence diagrams
  193. Interlocking
  195. Apparatus control APC
  197. Error handling
  198. Bay control QCBAY
  201. Local/Remote switch LOCREM
  204. Switch controller SCSWI
  207. Interaction with switch on process bus
  208. Circuit breaker SXCBR
  211. Proxy for signals from switching device via GOOSE XLNPROXY
  213. Logic rotating switch for function selection and LHMI presentation SLGAPC
  216. Graphical display
  217. Selector mini switch VSGAPC
  220. Generic communication function for Double Point indication DPGAPC
  222. Single point generic control 8 signals SPC8GAPC
  230. Scheme communication logic for distance or overcurrent protection ZCPSCH
  233. Blocking scheme
  234. Permissive underreaching scheme
  235. Permissive overreaching scheme
  236. Intertrip scheme
  237. Simplified logic diagram
  241. Weak-end infeed logic
  245. Scheme communication logic for residual overcurrent protection ECPSCH
  249. Permissive under/overreaching scheme
  250. Unblocking scheme
  257. Tripping logic SMPPTRC
  261. Logic diagram
  263. General start matrix block SMAGAPC
  265. Trip matrix logic TMAGAPC
  271. Logic for group warning WRNCALH
  276. AND function block AND
  280. OR function block
  281. Pulse timer function block PULSETIMER
  282. Reset-set with memory function block RSMEMORY
  289. Boolean 16 to Integer conversion B16I
  303. Operation accuracy
  309. Measurements
  315. Measurements CVMMXN
  316. Phase current measurement CMMXU
  317. Phase-phase and phase-neutral voltage measurements VMMXU, VNMMXU
  318. Gas medium supervision SSIMG
  322. Liquid medium supervision SSIML
  329. Circuit breaker contact travel time
  330. Circuit breaker status
  331. Remaining life of circuit breaker
  332. Accumulated energy
  333. Circuit breaker operation cycles
  334. Circuit breaker operation monitoring
  335. Circuit breaker spring charge monitoring
  336. Circuit breaker gas pressure indication
  337. Event function EVENT
  341. Disturbance report DRPRDRE
  348. Logical signal status report BINSTATREP
  352. Fault locator LMBRFLO
  356. Measuring Principle
  357. The non-compensated impedance model
  360. Reporting
  366. Memory storage
  367. Pulse-counter logic PCFCNT
  375. Access point
  376. Access point diagnostics
  380. Merging unit
  382. Routes
  384. Communication protocols
  385. DNP3 protocol
  386. Communication interfaces and protocols
  394. GOOSE function block to receive an integer value GOOSEINTRCV
  396. GOOSEMVRCV
  398. GOOSE function block to receive a single point value GOOSESPRCV
  401. Horizontal communication via GOOSE for interlocking GOOSEINTLKRCV
  404. GOOSE binary receive GOOSEBINRCV
  406. GOOSEXLNRCV
  412. IEC 61850 quality expander QUALEXP
  416. SPA communication protocol
  418. Communication ports
  420. IEC 60870-5-103 communication protocol
  422. I103MEASUSR
  424. Function status auto-recloser for IEC 60870-5-103 I103AR
  425. Function status earth-fault for IEC 60870-5-103 I103EF
  426. I103FLTPROT
  429. IED status for IEC 60870-5-103 I103IED
  434. Function commands for IEC 60870-5-103 I103CMD
  437. Identification
  447. Security events on protocols SECALARM
  453. Transmission of local analog data via LDCM to remote end function block LDCMTRN called LDCMTransmit
  454. Authority check ATHCHCK
  456. Authorization with Central Account Management enabled IED
  457. Authority management AUTHMAN
  460. Self supervision with internal event list INTERRSIG
  461. Internal signals
  462. Supervision of analog inputs
  464. Denial of service DOS
  465. Time synchronization TIMESYNCHGEN
  467. Real-time clock (RTC) operation
  468. Synchronization alternatives
  469. Process bus IEC/UCA 61850-9-2LE synchronization
  471. Parameter setting groups
  473. Test mode functionality TESTMODE
  475. IED identifiers TERMINALID
  476. Product information PRODINF
  477. Signal matrix for binary inputs SMBI
  479. Signal matrix for binary outputs SMBO
  484. Frequency values
  485. Summation block 3 phase 3PHSUM
  488. Primary system values PRIMVAL
  489. Overview
  490. Case from the rear side
  491. Hardware modules
  492. Numeric module (NUM)
  495. Introduction
  497. Analog digital conversion module (ADM)
  498. Binary input module (BIM)
  506. Binary input/output module (IOM)
  510. Serial and LON communication module (SLM)
  515. IRIG-B time synchronization module IRIG-B
  517. Dimensions
  518. Case without rear cover
  519. Flush mounting dimensions
  520. Side-by-side flush mounting dimensions
  521. Wall mounting dimensions
  522. Mounting procedure for flush mounting
  523. Mounting procedure for 19" panel rack mounting
  524. Wall mounting
  525. Mounting procedure for wall mounting
  526. Side-by-side 19" rack mounting
  527. Mounting procedure for side-by-side rack mounting
  528. Side-by-side flush mounting
  529. Mounting procedure for side-by-side flush mounting
  530. Electrical safety
  531. Influencing factors
  532. Type tests according to standard
  533. Section 23 Labels
  534. Section 24 Connection diagrams
  535. Section 25 Inverse time characteristics
  536. Principle of operation
  537. Inverse characteristics
  538. Section 26 Glossary
RED650 first page preview

RED650

Brand: ABB | Category: Power distribution unit
Table of contents
  1. Table Of Contents
  2. Table Of Contents
  3. Table Of Contents
  4. Table Of Contents
  5. Table Of Contents
  6. Table Of Contents
  7. Table Of Contents
  8. Table Of Contents
  9. Table Of Contents
  10. Table Of Contents
  11. Table Of Contents
  12. Table Of Contents
  13. Table Of Contents
  14. Section 1 Introduction
  15. Product documentation
  16. Document revision history
  17. Document symbols and conventions
  18. Document conventions
  19. Section 2 Application
  20. Main protection functions
  21. Control and monitoring functions
  22. Communication
  23. Basic IED functions
  24. Section 3 Configuration
  25. Section 4 Analog inputs
  26. Setting of current channels
  27. Example 2
  28. Example 3
  29. Examples on how to connect, configure and set CT inputs for most commonly used CT connections
  30. Example on how to connect a star connected three-phase CT set to the IED
  31. Example how to connect delta connected three-phase CT set to the IED
  32. Example how to connect single-phase CT to the IED
  33. Relationships between setting parameter Base Current, CT rated primary current and minimum pickup of a protection IED
  34. Setting of voltage channels
  35. Examples on how to connect a three phase-to-earth connected VT to the IED
  36. Example on how to connect a phase-to-phase connected VT to the IED
  37. Example on how to connect an open delta VT to the IED for high impedance earthed or unearthed netwoeks
  38. Example how to connect the open delta VT to the IED for low impedance earthed or solidly earthed power systems
  39. Example on how to connect a neutral point VT to the IED
  40. Section 5 Local HMI
  41. Display
  42. LEDs
  43. Keypad
  44. Local HMI functionality
  45. Parameter management
  46. Section 6 Differential protection
  47. Transformer winding, solidly earthed
  48. Autotransformer winding, solidly earthed
  49. Reactor winding, solidly earthed
  50. CT earthing direction
  51. Settings
  52. Line differential protection
  53. Power transformers in the protected zone
  54. Small power transformers in a tap
  55. Time synchronization
  56. Configuration of analog signals
  57. Configuration of LDCM output signals
  58. Open CT detection
  59. Setting guidelines
  60. Percentage restrained differential operation
  61. The 2nd and 5th harmonic analysis
  62. Internal/external fault discriminator
  63. Power transformer in the protected zone
  64. Settings examples
  65. Section 7 Impedance protection
  66. Fault infeed from remote end
  67. Load encroachment
  68. Short line application
  69. Parallel line application with mutual coupling
  70. Tapped line application
  72. Setting of zone 1
  73. Setting of reverse zone
  74. Setting the reach with respect to load
  75. Zone reach setting higher than minimum load impedance
  76. Other settings
  77. Automatic switch onto fault logic ZCVPSOF
  79. Section 8 Current protection
  80. Meshed network without parallel line
  81. Meshed network with parallel line
  82. Four step phase overcurrent protection OC4PTOC
  84. Settings for each step
  85. nd harmonic restrain
  86. Instantaneous residual overcurrent protection EFPIOC
  87. Identification
  88. Four step residual overcurrent protection EF4PTOC
  90. Common settings for all steps
  92. Switch onto fault logic
  93. Line application example
  94. Sensitive directional residual overcurrent and power protection SDEPSDE
  96. Breaker failure protection CCRBRF
  98. Stub protection STBPTOC
  101. Directional underpower protection GUPPDUP
  103. Directional overpower protection GOPPDOP
  105. Broken conductor check BRCPTOC
  106. Section 9 Voltage protection
  107. Equipment protection, such as for motors and generators
  108. General current and voltage protection CVGAPC
  109. Current and voltage selection for CVGAPC function
  110. Base quantities for CVGAPC function
  111. Inadvertent generator energization
  113. Negative sequence overcurrent protection
  114. Generator stator overload protection in accordance with IEC or ANSI standards
  115. Open phase protection for transformer, lines or generators and circuit breaker head flashover protection for generators
  116. Voltage restrained overcurrent protection for generator and step-up transformer
  117. Current circuit supervision CCSSPVC
  118. Fuse failure supervision FUFSPVC
  120. Zero sequence based
  121. Delta U and delta I
  122. Synchrocheck, energizing check, and synchronizing SESRSYN
  123. Synchrocheck
  124. Energizing check
  125. External fuse failure
  126. Application examples
  127. Single circuit breaker with double busbar, external voltage selection
  129. Autorecloser for 1 phase, 2 phase and/or 3 phase operation SMBRREC
  130. Auto-reclosing operation OFF and ON
  131. Start auto-reclosing from CB open information
  132. Long trip signal
  133. ARMode = 1/2ph , 1-phase or 2-phase reclosing in the first shot
  134. External selection of auto-reclose mode
  135. Transient fault
  136. Evolving fault
  137. Automatic continuation of the reclosing sequence
  138. Auto-recloser parameter settings
  139. Apparatus control APC
  140. Bay control (QCBAY)
  141. Switch controller (SCSWI)
  142. Switches (SXCBR/SXSWI)
  143. Interaction between modules
  146. Switch (SXCBR/SXSWI)
  153. Scheme communication logic for distance or overcurrent protection ZCPSCH
  154. Delta blocking scheme
  155. Permissive schemes
  156. Intertrip scheme
  158. Permissive underreaching scheme
  159. Application
  161. Current reversal and weak-end infeed logic for phase segregated communication ZC1WPSCH
  163. Local acceleration logic ZCLCPSCH
  165. Tripping logic SMPPTRC
  166. Three-phase tripping
  167. Single-, two- or three-phase tripping
  168. Lock-out
  172. Fixed signal function block FXDSIGN
  173. Boolean 16 to Integer conversion B16I
  174. Boolean to integer conversion with logical node representation, 16 bit BTIGAPC
  175. Integer to Boolean 16 conversion IB16
  178. Elapsed time integrator with limit transgression and overflow supervision TEIGAPC
  180. Comparator for real inputs - REALCOMP
  181. Measurement
  182. Zero clamping
  184. Setting examples
  185. Gas medium supervision SSIMG
  186. Liquid medium supervision SSIML
  189. Event function EVENT
  192. Recording times
  193. Binary input signals
  194. Sub-function parameters
  195. Logical signal status report BINSTATREP
  196. Fault locator LMBRFLO
  197. Connection of analog currents
  198. Limit counter L4UFCNT
  200. Pulse-counter logic PCFCNT
  201. Function for energy calculation and demand handling ETPMMTR
  203. Communication protocols
  204. Horizontal communication via GOOSE for interlocking GOOSEINTLKRCV
  205. IEC 61850-8-1 redundant station bus communication - PRP
  207. LON communication protocol
  208. MULTICMDRCV and MULTICMDSND
  211. IEC 60870-5-103 communication protocol
  212. DNP3 Communication protocol
  213. Binary signal transfer
  215. Authority status ATHSTAT
  216. Change lock CHNGLCK
  218. IED identifiers TERMINALID
  219. Measured value expander block RANGE_XP
  220. Parameter setting groups
  225. Test mode functionality TESTMODE
  226. IEC 61850 protocol test mode
  229. Current transformer requirements
  230. Fault current
  231. General current transformer requirements
  232. Distance protection
  233. Breaker failure protection
  234. Current transformer requirements for CTs according to other standards
  235. Current transformers according to IEC 61869-2, class P, PR
  236. Voltage transformer requirements
  237. Section 22 Glossary
RED650 first page preview

RED650

Brand: ABB | Category: Protection Device
RED650 first page preview

RED650

Brand: ABB | Category: Industrial Equipment
RED650 first page preview

RED650

Brand: ABB | Category: Control Unit
RED650 first page preview

RED650

Brand: ABB | Category: Protection Device
Table of contents
  1. Table Of Contents
  2. Section 1 Introduction
  3. Product documentation
  4. Document revision history
  5. Related documents
  6. Document symbols and conventions
  7. Document conventions
  8. Section 2 DNP3 data mappings
  9. BI4 Binary input
RED650 first page preview

RED650

Brand: ABB | Category: Protection Device
Table of contents
  1. Table Of Contents
  2. Table Of Contents
  3. Table Of Contents
  4. Table Of Contents
  5. Table Of Contents
  6. Table Of Contents
  7. Table Of Contents
  8. Table Of Contents
  9. Table Of Contents
  10. Table Of Contents
  11. Table Of Contents
  12. Table Of Contents
  13. Table Of Contents
  14. Table Of Contents
  15. Table Of Contents
  16. Section 1 Introduction
  17. Intended audience
  18. Document revision history
  19. Document symbols and conventions
  20. Document conventions
  21. Section 2 Application
  22. Main protection functions
  23. Back-up protection functions
  24. Control and monitoring functions
  25. Communication
  26. Basic IED functions
  27. Section 3 Configuration
  28. Section 4 Analog inputs
  29. Setting of the phase reference channel
  30. Example 2
  31. Example 3
  32. Examples on how to connect, configure and set CT inputs for most commonly used CT connections
  33. Example on how to connect a star connected three phase CT set to the IED
  34. Example how to connect single-phase CT to the IED
  35. Relationships between setting parameter Base Current, CT rated primary current and minimum pickup of a protection IED
  36. Examples how to connect, configure and set VT inputs for most commonly used VT connections
  37. Examples on how to connect a three phase-to-earth connected VT to the IED
  38. Example on how to connect a phase-to-phase connected VT to the IED
  39. Example on how to connect an open delta VT to the IED for high impedance earthed or unearthed networks
  40. for low impedance earthed or solidly earthed power systems
  41. Section 5 Local HMI
  42. Display
  43. LEDs
  44. Keypad
  45. Local HMI functionality
  46. Parameter management
  47. Front communication
  48. Line differential protection
  49. Power transformers in the protected zone
  50. Small power transformers in a tap
  51. Charging current compensation
  52. Time synchronization
  53. Configuration of analog signals
  54. Configuration of output signals
  55. Setting guidelines
  56. Percentage restrained differential operation
  57. The 2nd and 5th harmonic analysis
  58. Internal/external fault discriminator
  60. Settings examples
  61. Distance protection ZMFPDIS
  62. Fault infeed from remote end
  63. Load encroachment
  64. Short line application
  65. Parallel line application with mutual coupling
  66. Tapped line application
  68. Setting of zone 1
  69. Setting of reverse zone
  70. Setting the reach with respect to load
  71. Zone reach setting lower than minimum load impedance
  72. Zone reach setting higher than minimum load impedance
  73. Other settings
  74. ZMMMXU settings
  75. Power swing detection ZMRPSB
  76. Basic characteristics
  77. Automatic switch onto fault logic ZCVPSOF
  79. Instantaneous phase overcurrent protection PHPIOC
  81. Meshed network with parallel line
  82. Directional phase overcurrent protection, four steps OC4PTOC
  84. Settings for each step
  85. Setting example
  86. Instantaneous residual overcurrent protection EFPIOC
  87. Directional residual overcurrent protection, four steps EF4PTOC
  89. Common settings for all steps
  90. nd harmonic restrain
  91. Parallel transformer inrush current logic
  92. Switch onto fault logic
  93. Settings for each step (x = 1, 2, 3 and 4)
  94. Line application example
  95. Thermal overload protection, one time constant, Celsius Fahrenheit LCPTTR/LFPTTR
  96. Setting guideline
  97. Breaker failure protection CCRBRF
  99. Pole discordance protection CCPDSC
  100. Identification
  101. Two step undervoltage protection UV2PTUV
  103. Settings for two step undervoltage protection
  104. Two step overvoltage protection OV2PTOV
  105. Application
  106. Equipment protection, such as for motors, generators reactors and transformers
  107. Two step residual overvoltage protection ROV2PTOV
  108. reactors and transformersEquipment protection for transformers
  109. Direct earthed system
  110. Settings for two step residual overvoltage protection
  111. Underfrequency protection SAPTUF
  112. Overfrequency protection SAPTOF
  114. Rate-of-change of frequency protection SAPFRC
  115. Current circuit supervision CCSSPVC
  116. Fuse failure supervision FUFSPVC
  118. Negative sequence based
  119. Zero sequence based
  120. Dead line detection
  121. Synchrocheck, energizing check, and synchronizing SESRSYN
  122. Synchrocheck
  123. Energizing check
  124. Voltage selection
  125. External fuse failure
  126. Application examples
  127. Single circuit breaker with single busbar
  128. Single circuit breaker with double busbar, external voltage selection
  130. SMBRREC
  131. Auto reclosing operation Off and On
  132. Start auto reclosing from circuit breaker open information
  133. Long trip signal
  134. first shot
  135. reclosing in the first shot
  136. External selection of auto reclosing mode
  137. Permanent fault and reclosing unsuccessful signal
  138. Evolving fault
  139. Automatic continuation of the auto reclosing sequence
  140. Auto recloser settings
  141. Apparatus control
  142. Bay control QCBAY
  143. Switch controller SCSWI
  144. Switches SXCBR
  145. XLNPROXY
  146. Interaction between modules
  148. Bay control (QCBAY)
  149. Switch (SXCBR)
  152. Selector mini switch VSGAPC
  153. Generic communication function for Double Point indication DPGAPC
  155. AutomationBits, command function for DNP3.0 AUTOBITS
  156. Single command, 16 signals SINGLECMD
  158. Scheme communication logic for distance or overcurrent protection ZCPSCH
  159. Blocking schemes
  160. Delta blocking scheme
  161. Permissive schemes
  162. Intertrip scheme
  164. Permissive underreaching scheme
  165. Current reversal and Weak-end infeed logic for distance protection 3-phase ZCRWPSCH
  166. Weak-end infeed logic
  168. Local acceleration logic ZCLCPSCH
  169. protection ECPSCH
  171. Current reversal and weak-end infeed logic for residual overcurrent protection ECRWPSCH
  174. Weak-end infeed
  175. Tripping logic SMPPTRC
  176. Three-phase tripping
  177. Single-, two- or three-phase tripping
  178. Example of directional data
  179. Blocking of the function block
  183. Fixed signal function block FXDSIGN
  184. Boolean 16 to Integer conversion B16I
  186. Boolean to integer conversion with logical node representation, 16 bit BTIGAPC
  187. Integer to Boolean 16 conversion IB16
  188. representation ITBGAPC
  189. Elapsed time integrator with limit transgression and overflow supervision TEIGAPC
  192. Comparator for real inputs - REALCOMP
  194. Measurement
  195. Zero clamping
  197. Setting examples
  198. Gas medium supervision SSIMG
  200. Liquid medium supervision SSIML
  201. Breaker monitoring SSCBR
  203. Event function EVENT
  205. Disturbance report DRPRDRE
  207. Recording times
  208. Binary input signals
  209. Analog input signals
  210. Consideration
  211. Logical signal status report BINSTATREP
  214. Connection of analog currents
  215. Limit counter L4UFCNT
  217. Pulse-counter logic PCFCNT
  218. Function for energy calculation and demand handling ETPMMTR
  220. Access point
  221. Redundant communication
  224. Merging unit
  226. Communication protocols
  228. Receiving data
  229. IEC/UCA 61850-9-2LE communication protocol
  231. Specific settings related to the IEC/UCA 61850-9-2LE communication
  232. Setting examples for IEC/UCA 61850-9-2LE and time synchronization
  233. IEC 61850 quality expander QUALEXP
  234. LON communication protocol
  235. MULTICMDRCV and MULTICMDSND
  238. IEC 60870-5-103 communication protocol
  239. Design
  240. Settings
  241. Settings for RS485 and optical serial communication
  242. Settings from PCM600
  243. Function and information types
  244. DNP3 Communication protocol
  245. Binary signal transfer
  246. Communication hardware solutions
  248. Authority status ATHSTAT
  249. Change lock CHNGLCK
  250. Denial of service SCHLCCH/RCHLCCH
  251. IED identifiers TERMINALID
  252. Factory defined settings
  259. Test mode functionality TESTMODE
  262. Process bus IEC/UCA 61850-9-2LE synchronization
  263. Current transformer requirements
  264. Conditions
  265. Fault current
  266. General current transformer requirements
  267. Distance protection
  268. Breaker failure protection
  269. Current transformer requirements for CTs according to other standards
  270. Voltage transformer requirements
  271. SNTP server requirements
  272. IEC/UCA 61850-9-2LE Merging unit requirements
  273. Section 23 Glossary
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