I.B. 17555C
Effective November 1999
Page 9
Phase Inverse Time Overcurrent Time Multiplier:
The available time settings, shown in Table 2.2, depend
on the curve shape selected. For the thermal curves, the
settings represent relay operating times at a current value
equal to 3 times (I
n
). For ANSI and IEC curves, the set-
tings represent the relay’s time multiplier for the current
value equal to I/I
pu
.
Phase Short Delay Pickup: The available pickup set-
tings, shown in Table 2.2, range from 1 to 11 times (I
n
) or
NONE. If NONE is selected, the short delay protective
function is disabled.
Phase Short Delay Time: The available time settings,
shown in Table 2.2, range from 0.05 to 1.5 seconds at
currents equal to or above the short delay pickup setting
selected. If NONE was selected for the Phase Short
Delay Pickup Setting, the relay will bypass requesting the
time setting.
Phase Instantaneous: The available pickup settings,
shown in Table 2.2, range from 1 to 25 times (I
n
) or
NONE. If NONE is selected, the instantaneous protective
function is disabled and a choice of whether to turn the
discriminator option on (DON) or off (DOFF) is offered.
The discriminator is a true making current release. When
the circuit breaker closes, the discriminator function, if
selected to be on, is functional in an instantaneous trip
mode for 10 cycles after the breaker closes. The breaker
will trip instantaneously via the discriminator, if the fault
current is above 11 times (I
n
). After the 10 cycle period
has passed, the discriminator will no longer be functional.
It becomes functional again only when the breaker opens
and then is reclosed.
Ground Fault: After the phase instantaneous setting is
established, the ground curve shape, the ground inverse
time overcurrent pickup, ground inverse time overcurrent
time, ground short delay pickup, ground short delay time
and ground instantaneous settings are selected. The
available settings are shown in Table 2.3. Note that the
ground curve settings are independent of the phase
curve and are programmed separately.
Programming the ground settings is done in the same
manner as the phase settings, except there is no discrim-
inator option for ground instantaneous, and there is a
NONE selection for the inverse time overcurrent pickup
setting.
Note: The DT3000 displays pickup settings in the
“Settings” window to three significant digits only. If
there is a 4th digit in the setting, it will not be
displayed in the “Settings” window.
TABLE 2.4 MISCELLANEOUS SETTINGS
TYPE SETTING
AVAILABLE SETTINGS
HIGHLOAD TIME
(pickup fixed @ 0.85 X Phase
Time Overcurrent Setting)
0 Sec, 5 Sec, 10 Sec, 30 Sec, 1 min, 2 min, 5 min
FREQUENCY
50 Hz, 60 Hz
PHASE CT RATIO
5,10, 25, 50, 75,100,150, 200, 250, 300, 400, 500, 600, 630,
800,1000,1200,1250,1500,1600, 2000, 2400, 2500, 3000,
3200, 4000, 5000
GROUND CT RATIO
5,10, 25, 50, 75,100,150, 200, 250, 300, 400, 500, 600, 630,
800,1000,1200,1250,1500,1600, 2000, 2400, 2500, 3000,
3200, 4000, 5000
TEST
Phase
Phase Trip
Ground
Ground Trip
P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P12, P14, P16
P18, P20, P22, P25
P3T, P10T, P25T
G.1, G.2, G.3, G.4, G.5, G.6, G.7, G.8, G.9, Gi, G2, G3, G4
G5, G6, G8, G10
G1T, G3T, G10T
Содержание Cutler-Hammer Digitrip 3000
Страница 18: ...I B 17555C Effective November 1999 Page 12 Fig 2 1 Typical Communications Wiring Diagram...
Страница 27: ...I B 17555C Effective November 1999 Page 21 Fig 3 1 Digitrip 3000 Typical Wiring Diagram...
Страница 36: ...I B 17555C Effective November 1999 Page 30 Fig 3 11 Local Programming Sequence Flow Chart...
Страница 37: ...I B 17555C Effective November 1999 Page 31...
Страница 48: ...I B 17555C Effective November 1999 Page 42 Fig 7 1 Inverse Time Overcurrent Phase I4T Curves SC 5390 92B...
Страница 49: ...I B 17555C Effective November 1999 Page 43 Fig 7 2 Inverse Time Overcurrent Phase I2T Curves SC 5391 92B...
Страница 50: ...I B 17555C Effective November 1999 Page 44 Fig 7 3 Inverse Time Overcurrent Phase IT Curves SC 5392 92B...
Страница 51: ...I B 17555C Effective November 1999 Page 45 Fig 7 4 Inverse Time Overcurrent Phase Flat Curves SC 5393 92B...
Страница 52: ...I B 17555C Effective November 1999 Page 46 Fig 7 5 Short Delay Phase Curves SC 5394 92B...
Страница 53: ...I B 17555C Effective November 1999 Page 47 Fig 7 6 Inverse Time Overcurrent Short Delay Curves SC 5395 92B...
Страница 54: ...I B 17555C Effective November 1999 Page 48 Fig 7 7 Instantaneous Curves SC 5396 92B...
Страница 55: ...I B 17555C Effective November 1999 Page 49 Fig 7 8 Inverse Time Overcurrent Ground I4T Curves SC 5399 92B...
Страница 56: ...I B 17555C Effective November 1999 Page 50 Fig 7 9 Inverse Time Overcurrent Ground I2T Curves SC 5400 92B...
Страница 57: ...I B 17555C Effective November 1999 Page 51 Fig 7 10 Inverse Time Overcurrent Ground IT Curves SC 5401 92B...
Страница 58: ...I B 17555C Effective November 1999 Page 52 Fig 7 11 Inverse Time Overcurrent Ground Flat Curves SC 5402 92B...
Страница 59: ...I B 17555C Effective November 1999 Page 53 Fig 7 12 Short Delay Ground Curves SC 5403 92B...
Страница 60: ...I B 17555C Effective November 1999 Page 54 Fig 7 13 ANSI Moderately Inverse Curves SC 6685 96...
Страница 61: ...I B 17555C Effective November 1999 Page 55 Fig 7 14 ANSI Very Inverse Curves SC 6686 96...
Страница 62: ...I B 17555C Effective November 1999 Page 56 Fig 7 15 ANSI Extremely Inverse Curves SC 6687 96...
Страница 63: ...I B 17555C Effective November 1999 Page 57 Fig 7 16 IEC A Moderately Inverse Curves SC 6688 96...
Страница 64: ...I B 17555C Effective November 1999 Page 58 Fig 7 17 IEC B Very Inverse Curves SC 6689 96...
Страница 65: ...I B 17555C Effective November 1999 Page 59 Fig 7 18 IEC C Extremely Inverse Curves SC 6690 96...
Страница 66: ...I B 17555C Effective November 1999 Page 60 Fig 7 19 IEC D Flat Curves SC 6691 96...
Страница 68: ...I B 17555C Effective November 1999 Page 62...
Страница 73: ...I B 17555C Effective November 1999 Page A5 Fig A 7 DT3001 Typical Wiring Diagram...
Страница 76: ...I B 17555C Effective November 1999 Page A8...
Страница 81: ...I B 17555C Effective November 1999 Page B5 Fig B 2 Digitrip 3010 3020 Dimensions Inches...
Страница 83: ...I B 17555C Effective November 1999 Page B7 Fig B 3 Digitrip 3010 3020 Typical Wiring Diagram...
Страница 89: ...I B 17555C Effective November 1999 Page B13...
Страница 90: ...I B 17555C Effective November 1999 Page B14...
Страница 91: ...I B 17555C Effective November 1999 Page B15...