GE M60 Instruction Manual page 352

GROUPED ELEMENTS
The undervoltage delay setting defines the family of curves shown as follows.
where
T = operating time
D = undervoltage delay setting (D = 0.00 operates instantaneously)
V = secondary voltage applied to the relay
V = pickup level
pickup
5
At 0% of pickup, the operating time equals the
5.7.10.2 Phase undervoltage (ANSI 27P, IEC PTUV)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS  PHASE UNDERVOLTAGE1(3)
 PHASE
 UNDERVOLTAGE1
5-224
D
T = ----------------------------- -
V

--------------- -
1
–

V
pickup
Figure 5-121: Inverse time undervoltage curves
% of voltage pickup
PHASE UNDERVOLTAGE DELAY
PHASE UV1

FUNCTION: Disabled
PHASE UV1 SIGNAL

SOURCE: SRC 1
PHASE UV1 MODE:

Phase to Ground
PHASE UV1

PICKUP: 1.000 pu
PHASE UV1

CURVE: Definite Time
PHASE UV1

DELAY: 1.00 s
PHASE UV1 MINIMUM

VOLTAGE: 0.100 pu
PHASE UV1 BLOCK:

Off


842788A1.CDR
setting.
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: Phase to Ground, Phase to Phase
Range: 0.000 to 3.000 pu in steps of 0.001
Range: Definite Time, Inverse Time
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.000 to 3.000 pu in steps of 0.001
Range: FlexLogic operand
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
Eq. 5-39