GE 889 Instruction Manual page 35

CHAPTER 1: INTRODUCTION
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
FLEXELEMENTS
Number of elements: ........................................8
Operating signal:.................................................Any analog actual value, or two values in a differential mode
Operating signal mode: ...................................Signed, or Absolute value
Operating mode: .................................................Level, Delta
Comparison direction: ......................................Over, Under
Pickup Level:..........................................................-30.000 to 30.000 pu in steps of 0.001 pu
Hysteresis:..............................................................0.1 to 50.0% in steps of 0.1%
Delta dt: ...................................................................40 msec to 45 days
Pickup and dropout delays: ...........................0.000 to 6000.000 s in steps of 0.001 s
FLEXSTATES
Number of States:...............................................256 logical variables grouped under 16 Modbus addresses
Programmability:................................................Any FlexLogic operand, any digital input, any virtual input,
NON-VOLATILE LATCHES
Type: .........................................................................Set-dominant or Reset-dominant
Range: ......................................................................16 individually programmed
Output: .....................................................................Stored in non-volatile memory
Execution sequence: .........................................As input prior to protection, control and FlexLogic
FLEXCURVES
Number: ..................................................................4 (A through D)
Reset points:..........................................................40 (0.00 to 0.98 x pickup)
Operate points: ....................................................80 (1.03 to 20.0 x pickup)
Time delay: ............................................................0 to 200,000,000 ms in steps of 1 ms
Saturation level:...................................................20 times the pickup level
TAB PUSHBUTTONS
Number of elements: ........................................1 (20 Tab Pushbuttons)
Data Storage:........................................................Non-volatile memory
Mode:........................................................................Self-reset, latched
Display Message:................................................2 lines; 15 characters per line
Dropout Timer:.....................................................0.000 to 60.000 s in steps of 0.005
Auto-reset Timer:................................................0.2 to 600.0 s in steps of 0.1
Hold Timer: ............................................................0.1 to 10.0 s in steps of 0.1
Timer Accuracy: ..................................................±3% of delay setting or ±¼ cycle (whichever is greater) from
USER-PROGRAMMABLE LEDS
Number: ..................................................................17 (14 + 3 PB LEDS) for Membrane and Rugged Front Panels
Programmability:................................................any logic variable, contact, or virtual input
Reset mode:........................................................... self-reset or latched
USER-PROGRAMMABLE PUSHBUTTONS
Number of pushbuttons: .................................3 (Membrane and Rugged Front Panels)
Mode:........................................................................Self-reset, latched
Display message:................................................2 lines of 13 characters on each line
Dropout timer: ......................................................0.000 to 60.000 s in steps of 0.005
Auto-reset timer: .................................................0.2 to 600.0 s in steps of 0.1
Hold timer:..............................................................0.0 to 10.0 s in steps of 0.1
any remote input
pickup to operate
SPECIFICATIONS
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