GE L90 Instruction Manual Manual pdf 669 page image
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GE L90 Instruction Manual

Also see for L90: Communications manualCommunications guideInstruction manualInstruction manualInstruction manual

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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. Panel cutouts
  10. Vertical units
  11. Rear terminal layout
  12. Wiring
  13. Dielectric strength
  14. CT/VT modules
  15. Process bus modules
  16. Transducer inputs and outputs
  17. RS232 port
  18. CPU communication ports
  19. IRIG-B
  20. Pilot channel communications
  21. Fiber: LED and ELED transmitters
  22. G.703 interface
  23. RS422 interface
  24. Two-channel two-clock RS422 interface
  25. RS422 and fiber interface
  26. IEEE C37.94 interface
  27. C37.94SM interface
  28. Activate relay
  29. Install software
  30. System requirements
  31. Add device to software
  32. Set IP address in UR
  33. Configure serial connection
  34. Configure Ethernet connection
  35. Configure modem connection
  36. Connect to the L90
  37. Use Quick Connect via the front panel RS232 port
  38. Use Quick Connect via a rear Ethernet port
  39. Set up CyberSentry and change default password
  40. Connect to D400 gateway
  41. Setting files
  42. Introduction
  43. Event viewing
  44. File support
  45. Protection summary window
  46. Settings templates
  47. Secure and lock FlexLogic equations
  48. Settings file traceability
  49. Front panel interface
  50. Front panel display
  51. Front panel navigation keys
  52. LED indicators
  53. Front panel labelling
  54. Menu navigation
  55. Change settings
  56. View actual values
  57. Breaker control
  58. Change passwords
  59. Invalid password entry
  60. FlexLogic design using Engineer
  61. Design logic
  62. Send file to and from device
  63. Monitor logic
  64. View front panel and print labels
  65. Generate connectivity report
  66. Toolbars
  67. Overview
  68. Introduction to AC sources
  69. Product setup
  70. Display properties
  71. Graphical front panel
  72. Clear relay records
  73. Communications
  74. Modbus user map
  75. Fault reports
  76. Oscillography
  77. Data logger
  78. Demand
  79. User-programmable LEDs
  80. User-programmable self-tests
  81. Control pushbuttons
  82. User-programmable pushbuttons
  83. Flex state parameters
  84. User-definable displays
  85. Installation
  86. Remote resources
  87. System setup
  88. Power system
  89. Signal sources
  90. L power system
  91. Breakers
  92. Disconnect switch control
  93. FlexCurves
  94. Phasor Measurement Unit
  95. FlexLogic operands
  96. FlexLogic rules
  97. FlexLogic evaluation
  98. FlexLogic equation editor
  99. Non-volatile latches
  101. Line differential elements
  102. Line pickup
  103. Distance
  104. Power swing detect (ANSI 68)
  105. Load encroachment
  106. Phase current
  107. Neutral current
  108. Wattmetric ground fault
  109. Ground current
  110. Negative sequence current
  111. Breaker failure (ANSI 50BF)
  112. Voltage elements
  113. Supervising elements
  114. Sensitive directional power
  116. Setting groups
  117. Selector switch
  118. Trip output
  119. Underfrequency (ANSI 81U)
  120. Overfrequency (ANSI 81O)
  121. Synchrocheck (ANSI 25)
  122. Digital elements
  123. Digital counters
  124. Monitoring elements
  125. Pilot schemes
  126. Autoreclose (ANSI 79)
  127. Frequency rate of change (ANSI 81R)
  128. Contact inputs
  129. Virtual inputs
  130. Contact outputs
  131. Virtual outputs
  132. Resetting
  133. DCmA inputs
  134. RTD inputs
  135. DCmA outputs
  136. Testing
  137. Test mode forcing
  138. Force contact inputs
  139. Channel tests
  141. RxGOOSE boolean inputs
  143. Autoreclose
  145. Selector switches
  146. Remaining connection status
  147. Parallel Redundancy Protocol (PRP)
  148. Metering conventions
  149. Differential current
  150. Sources
  152. Tracking frequency
  153. RxGOOSE analogs
  154. PMU aggregator
  155. Restricted ground fault
  157. Event records
  159. Phasor Measurement Unit records
  160. Product information
  161. Clear records
  162. Set date and time
  163. Phasor Measurement Unit one-shot
  164. Security
  165. Target messages
  166. CT saturation analysis tool
  167. Current differential (87L) settings
  168. Current differential pickup
  169. Breaker-and-a-half
  170. Distributed bus protection
  171. Channel asymmetry compensation using GPS
  172. Compensation method 2
  173. Compensation method 3
  174. Distance backup/supervision
  175. Phase distance
  176. Ground distance
  177. Protection signaling schemes
  178. Direct under-reaching transfer trip (DUTT)
  179. Hybrid POTT scheme (HYB-POTT)
  180. Directional comparison blocking
  181. Series compensated lines
  182. Ground directional overcurrent
  183. Transformer load currents
  184. Instantaneous elements
  185. Phase distance through power transformers
  186. Example
  188. Clock synchronization tests
  189. Current differential
  190. Local-remote relay tests
  192. L90 architecture
  193. Disturbance detection
  194. Ground differential element
  195. Clock synchronization
  196. Frequency detection
  197. Phase detection
  198. Phase locking filter
  199. Matching phaselets
  200. Start-up
  201. CT saturation detection
  202. Charging current compensation
  203. Differential element characteristics
  204. Relay synchronization
  205. Operating condition characteristics
  206. Trip decision example
  207. Distance elements
  208. Phasor estimation
  209. Fast distance algorithm
  210. Memory polarization
  211. Distance elements analysis
  212. Phase distance applied to power transformers
  214. Single-pole tripping
  215. Phase selection
  216. Communications channels for pilot-aided schemes
  217. Permissive echo signaling
  218. Pilot scheme / phase selector coordination
  219. Cross-country fault example
  220. Fault locator
  221. Single-ended fault locator
  222. Monitoring
  223. General maintenance
  224. CyberSentry security event files
  225. Convert device settings
  226. Copy settings to other device
  227. Compare two devices
  228. Restore settings
  229. Upgrade software
  230. Replace front panel
  231. Replace module
  232. Battery
  233. Dispose of battery
  234. Clear files and data after uninstall
  235. Storage
  236. A.1 FlexAnalog items
  237. B.1 RADIUS server configuration
  238. C.1 Command line interface
  239. D.1 Warranty
GE L90 Instruction Manual Manual pdf 669 page image
CHAPTER 6: ACTUAL VALUES METERINGL90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-136Figure 6-2: Flow direction of signed values for watts and VARs6.4.1.2 UR convention for measuring phase anglesAll phasors calculated by URs and used for protection, control and metering functions are rotating phasors that maintainthe correct phase angle relationships with each other at all times.
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