GE D90 Plus Instruction Manual page 37

CHAPTER 2: PRODUCT DESCRIPTION
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CONTACT INPUTS
Input rating:...........................................................300 V DC maximum
On threshold:.........................................................70% of nominal voltage setting or 20 V (whichever is greater)
Off threshold: ........................................................30% of nominal voltage setting or 15 V (whichever is greater)
Bounce threshold:...............................................50% of nominal voltage setting or 20 V (whichever is greater)
AZ threshold: .........................................................80% of nominal voltage setting
Overvoltage threshold:.....................................130% of nominal voltage setting or 285 V maximum
Maximum current:..............................................10 mA during turn on, 0.5 mA steady-state
Nominal voltage:.................................................24 to 250 V
Input impedance:................................................active
Recognition time: ................................................<1 ms
Debounce timer:..................................................1.50 to 16.00 ms in steps of 0.25
Chatter detection timer: ..................................1 to 100 seconds
Chatter state changes: ....................................10 to 100
DISTURBANCE DETECTOR (50DD)
Type:..........................................................................sensitive current disturbance detector
Range: ......................................................................0.004 to 0.04 pu (twice the current cut-off level threshold)
FLEXCURVES™
Number: ..................................................................4 (A through D)
Reset points:..........................................................40 (0 through 1 of pickup)
Operate points: ....................................................80 (1 through 20 of pickup)
Time delay:.............................................................0 to 65535 ms in steps of 1
FLEXELEMENTS™
Elements: ................................................................16
Operating signal:.................................................any analog actual value, or two values in differential mode
Operating signal mode: ...................................signed or absolute value
Operating mode: .................................................level, delta
Comparator detection:.....................................over, under
Pickup level: ...........................................................–90.000 to 90.000 pu in steps of 0.001
Hysteresis:..............................................................0.1 to 50.0% in steps of 0.1
Delta dt: ...................................................................20 ms to 60 days
Pickup delay: .........................................................0.000 to 65.535 seconds in steps of 0.001
Dropout delay:......................................................0.000 to 65.535 seconds in steps of 0.001
FLEXMATRIX
Principle:..................................................................aggregates and conditions signals for tripping and auxiliary
Timing accuracy: ................................................±1 ms
FLEX STATES
Number: ..................................................................up to 256 logical variables grouped under 16 Modbus
Programmability: ................................................any logical variable, contact, or virtual input
functions
addresses
SPECIFICATIONS
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