GE T60 Instruction Manual page 431

CHAPTER 5: SETTINGS
Multiplier Current ( I / I
(TDM)
1.5
1.00 44.44
10.00 444.44
100.00 4444.4
600.00 26666.7
FlexCurves
FlexCurves are described in the FlexCurves section later in this chapter. The curve shapes for the FlexCurves are derived
from the formulae:
where
T = operate time (in seconds)
TDM = Multiplier setting
I = Input Current
I = Pickup Current setting
pickup
T = Reset Time in seconds (assuming energy capacity is 100% and
RESET
Definite time curve
The Definite Time curve shape operates as soon as the pickup level is exceeded for a specified period of time. The base
definite time curve delay is in seconds. The curve multiplier of 0.00 to 600.00 makes this delay adjustable from
instantaneous to 600.00 seconds in steps of 10 ms. The definite time curve shapes are defined as follows:
where
T = Operate Time (in seconds)
TDM = Multiplier setting
I = Input Current
I = Pickup Current setting
pickup
T = Reset Time in seconds (assuming energy capacity is 100% and RESET: Timed)
RESET
Recloser curves
The T60 uses the FlexCurve feature to facilitate programming of 41 recloser curves. See the FlexCurves settings section
earlier in this chapter for details.
5.7.7.3 Phase time overcurrent (ANSI 51P, IEC PTOC)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE CURRENT  PHASE TOC1(6)
 PHASE TOC 1

T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
)
pickup
2.0 3.0 4.0
25.00 11.11 6.25
250.00 111.11 62.50
2500.0 1111.1 625.00
15000.0 6666.7 3750.0
PHASE TOC1

FUNCTION: Disabled
5.0 6.0 7.0
4.00 2.78 2.04
40.00 27.78 20.41
400.00 277.78 204.08
2400.0 1666.7 1224.5
: Timed)
RESET
Range: Disabled, Enabled
GROUPED ELEMENTS
8.0 9.0 10.0
1.56 1.23 1.00
15.63 12.35 10.00
156.25 123.46 100.00
937.50 740.74 600.00
Eq. 5-37
Eq. 5-38
Eq. 5-39
Eq. 5-40
5-249
5