4–57
System Setup and Setpoints – 4
Winding 2 negative sequence overcurrent
pickup establishes the
negative sequence overcurrent
level above which the definite time
function timer will start. This element operates on
I
2
.
This setting is the operating time of the definite time function.
Negative sequence overcurrent
pickup establishes the negative
sequence overcurrent
level above which the inverse time function
timer will start. This element operates on
I
2
.
This setting selects one of eleven families of curves, as shown in
Appendix D, Figures D-5 through D-15.
The appropriate curve in the selected family of curves is chosen here.
NOTE:
These screens are the same for Winding 4.
46DTW2 PICKUP
0.50 Amps
46DTW2 DELAY
120 Cycles
46ITW2 PICKUP
1.00 Amps
46ITW2 CURVE
BEDEF beinv bevinv beeinv
46ITW2 TIME DIAL
5.0
46DTW3 PICKUP
0.50 Amps
46DTW3 DELAY
120 Cycles
46ITW3 PICKUP
1.00 Amps
46ITW3 CURVE
BEDEF beinv bevinv beeinv
46ITW3 TIME DIAL
5.0
46 Negative Sequence Overcurrent
The 46 Negative Sequence Overcurrent function
provides protection against possible damage due
to unbalanced faults and open conductors.
The pickup setting of this function can be set below
the system load for increased sensitivity for phase-
to-phase fault backup of feeder protective relays.
This function has a definite time element and an
inverse time element. The definite time pickup value
and definite operating time are typically associated
with an alarm function. The inverse time element is
typically associated with a trip function.
The inverse time function can be selected as one
of the eleven curve families: definite, inverse, very
inverse, extremely inverse, and four IEC curves and
three IEEE curves. The operator selects the pickup
and time dial settings.
This protection must not operate for system faults
that will be cleared by feeder/line relaying. This re
-
quires coordination with feeder line protection, bus
differential, and breaker failure backup protections.
NOTE:
Winding Four is not available in Two or
Three Winding applications.
Summary of Contents for M?3311A
Page 1: ...Instruction Book M 3311A Transformer Protection Relay ...
Page 30: ... 29 M 3311A Transformer Protection Relay This Page Left Intentionally Blank ...
Page 55: ...M 3311A Instruction Book 1 6 This Page Left Intentionally Blank ...
Page 87: ...M 3311A Instruction Book 2 32 This Page Left Intentionally Blank ...
Page 89: ...M 3311A Instruction Book 3 2 Figure 3 2 IPScom Main Screen ...
Page 107: ...M 3311A Instruction Book 3 20 Figure 3 22 Setup System Dialog Screen 2 3 Winding ...
Page 108: ...IPScom 3 3 21 Figure 3 23 Setup System Dialog Screen 4 Winding ...
Page 112: ...IPScom 3 3 25 Figure 3 29 I O Map Screen 4 Winding ...
Page 114: ...IPScom 3 3 27 Figure 3 31 Display All Setpoints Screen 4 Winding ...
Page 119: ...M 3311A Instruction Book 3 32 Figure 3 38 View Sequence of Events Recorder Screen ...
Page 127: ...M 3311A Instruction Book 3 40 This Page Left Intentionally Blank ...
Page 150: ...4 23 System Setup and Setpoints 4 Figure 4 14 Setup Sequence of Events Recorder Dialog Screen ...
Page 163: ...4 36 M 3311A Instruction Book Figure 4 15 IPScom Relay Setup System Dialog Screen 2 3 Winding ...
Page 166: ...4 39 System Setup and Setpoints 4 Figure 4 18 IPScom Selection Screen for Input Settings ...
Page 179: ...4 52 M 3311A Instruction Book Figure 4 28 Example of V Hz Capability and Protection Curves ...
Page 187: ...4 60 M 3311A Instruction Book Figure 4 33 49 Function Overload Curves ...
Page 229: ...4 102 M 3311A Instruction Book Table 4 5 Transformer Connections ...
Page 231: ...4 104 M 3311A Instruction Book Table 4 7 Custom Transformer and CT Configuration ...
Page 243: ...M 3311A Instruction Book 5 6 Figure 5 5 Mounting Dimensions for GE L 2 Cabinet H3 and H4 ...
Page 383: ...A 50 M 3311A Instruction Book This Page Left Intentionally Blank ...
Page 389: ...M 3311A Instruction Book B 6 This Page Left Intentionally Blank ...
Page 393: ...D 2 M 3311A Instruction Book Figure D 1 Volts Hz 24IT Inverse Curve Family 1 Inverse Square ...
Page 394: ...Inverse Time Curves Appendix D D 3 Figure D 2 Volts Hz 24IT Inverse Family Curve 2 ...
Page 395: ...D 4 M 3311A Instruction Book Figure D 3 Volts Hz 24IT Inverse Time Curve Family 3 ...
Page 396: ...Inverse Time Curves Appendix D D 5 Figure D 4 Volts Hz 24IT Inverse Curve Family 4 ...
Page 399: ...D 8 M 3311A Instruction Book Figure D 5 Definite Time Overcurrent Curve ...
Page 400: ...Inverse Time Curves Appendix D D 9 Figure D 6 Inverse Time Overcurrent Curve ...
Page 401: ...D 10 M 3311A Instruction Book Figure D 7 Very Inverse Time Overcurrent Curve ...
Page 402: ...Inverse Time Curves Appendix D D 11 Figure D 8 Extremely Inverse Time Overcurrent Curve ...
Page 439: ...F 28 M 3311A Instruction Book This Page Left Intentionally Blank ...