GE 745 Instruction Manual page 176

S4 ELEMENTS
5.6.10.3 Frequency Decay

FREQUENCY
DECAY
5–80
PATH: SETPOINTS S4 ELEMENTS

[] FREQUENCY DECAY
FUNCTION: Disabled
FREQUENCY DECAY
MESSAGE
RLYS (1-8): --------
FREQUENCY DECAY
MESSAGE
TARGET: Self-Reset
CURRENT SENSING:
MESSAGE
Enabled
MINIMUM OPERATING
MESSAGE
CURRENT: 0.20 x CT
MINIMUM OPERATING
MESSAGE
VOLTAGE: 0.50 x VT
FREQUENCY DECAY
MESSAGE
THRESHOLD: 59.50 Hz
FREQUENCY DECAY
MESSAGE
DELAY: 0.00 s
FREQUENCY DECAY
MESSAGE
RATE 1: 0.4 Hz/s
FIGURE 5–30: Underfrequency 1 scheme logic
FREQUENCY

745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
FREQUENCY DECAY

Range: Enabled, Disabled
Range: 1 to 8
Range: Self-Reset, Latched, None
Range: Enabled, Disabled
Range: 0.05 to 1.00 x CT in steps of
0.01
Range: 0.10 to 0.99 x CT in steps of
0.01
Range: 45.00 to 59.99 Hz in steps of
0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.1 to 5.0 Hz/s in steps of 0.1