Protection Specifications - GE D90 Plus Instruction Manual

SPECIFICATIONS

Protection specifications

26
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
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION