Protection Specifications - GE D90 Plus Instruction Manual

CHAPTER 2: PRODUCT DESCRIPTION

Protection specifications

PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
AUTORECLOSURE
Applications:..........................................................two breakers
Tripping schemes: ..............................................single-pole and three-pole
Reclose attempts:...............................................up to 4 before lockout
Reclosing mode: ..................................................selectable
Breaker sequence:..............................................selectable
AUXILIARY OVERVOLTAGE
Pickup level: ...........................................................0.000 to 1.100 pu in steps of 0.001
Dropout level:........................................................<98% of pickup
Level accuracy: ....................................................±0.5% of reading from 10 to 208 V
Pickup delay: .........................................................0.00 to 600.00 seconds in steps of 0.01
Reset delay: ...........................................................0.00 to 600.00 seconds in steps of 0.01
Timing accuracy: ................................................±3% of operate time or ±4 ms (whichever is greater)
Operate time:........................................................<2 cycles at 1.10 × pickup at 60 Hz
AUXILIARY UNDERVOLTAGE
Pickup level: ...........................................................0.000 to 1.100 pu in steps of 0.001
Dropout level:........................................................>102% of pickup
Level accuracy: ....................................................±0.5% of reading from 10 to 208 V
Curve shapes:.......................................................GE IAV Inverse, Definite Time
Curve multiplier: ..................................................0.00 to 600.00 in steps of 0.01
Timing accuracy: ................................................±3% of operate time or ±4 ms (whichever is greater)
BREAKER FAILURE
Mode:........................................................................single-pole, three-pole
Current supervision: ..........................................phase current, neutral current
Supervision pickup:............................................0.001 to 30.000 pu in steps of 0.001
Supervision dropout: .........................................<98% of pickup
Supervision accuracy at 0.1 to 2.0 × CT:..±2% of rated
Supervision accuracy at >2.0 × CT: ............±2.5% of reading
Time accuracy: ....................................................±3% or 4 ms (whichever is greater)
BREAKER FLASHOVER
Operating quantity:............................................phase current, voltage, and voltage difference
Pickup level voltage: ..........................................0.000 to 1.500 pu in steps of 0.001
Dropout level voltage:.......................................97 to 98% of pickup
Pickup level current: ..........................................0.000 to 1.500 pu in steps of 0.001
Dropout level current:.......................................97 to 98% of pickup
Level accuracy: ....................................................±0.5% or ±0.1% of rated, whichever is greater
Pickup delay: .........................................................0.000 to 65.535 seconds in steps of 0.001
Time accuracy: ....................................................±3% or ±42 ms (whichever is greater)
Operate time:........................................................<42 ms at 1.10 × pickup at 60 Hz
SPECIFICATIONS
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