Toshiba GR-200-5 Instruction Manual page 6

Contents
1 Introduction ............................................................................................................................................ 1
Relay applications ........................................................................................................................... 2
Control and monitoring application ............................................................................................... 5
Monitoring and recording functions............................................................................................... 5
Hardware overview ......................................................................................................................... 6
Symbols used in logical diagrams .................................................................................................. 7
Abbreviation .................................................................................................................................. 10
Function Block (FB), Function ID, Signal number (Data ID) .................................................... 11
2 Relay application .................................................................................................................................. 13
Overcurrent protection (OC) ......................................................................................................... 15
Relay polarity ......................................................................................................................... 16
2.1.1
Inverse time and definite time delay characteristic ............................................................ 20
2.1.2
Threshold value for operation ............................................................................................... 27
2.1.3
Reset Ratio.............................................................................................................................. 27
2.1.4
Application for motor protection ........................................................................................... 28
2.1.5
Miscellaneous functions ......................................................................................................... 29
2.1.6
Scheme logic ........................................................................................................................... 30
2.1.7
Setting ..................................................................................................................................... 32
2.1.8
Signal ...................................................................................................................................... 37
2.1.9
Earth fault protection (EF) ........................................................................................................... 40
Relay polarity ......................................................................................................................... 41
2.2.1
Inverse time and definite time delay characteristic ............................................................ 43
2.2.2
Threshold level for operation ................................................................................................ 48
2.2.3
Reset Ratio.............................................................................................................................. 48
2.2.4
Miscellaneous functions ......................................................................................................... 49
2.2.5
Scheme logic ........................................................................................................................... 49
2.2.6
Setting ..................................................................................................................................... 51
2.2.7
Signal ...................................................................................................................................... 55
2.2.8
Directional earth fault command protection (DEFCAR) ............................................................ 57
Permissive overreach protection (POP) ................................................................................ 58
2.3.1
Unblocking overreach protection (UOP) .............................................................................. 61
2.3.2
Blocking overreach protection (BOP) ................................................................................... 61
2.3.3
Setting ..................................................................................................................................... 64
2.3.4
Signal ...................................................................................................................................... 65
2.3.5
Sensitive earth fault protection (SEF) ......................................................................................... 68
Relay polarity ......................................................................................................................... 69
2.4.1
Inverse time and definite time delay characteristic ............................................................ 71
2.4.2
Threshold level for operation ................................................................................................ 78
2.4.3
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