4–97
System Setup and Setpoints – 4
52-1
52
Self-Test Alarm Signal
46
R-1
R-2
R-3
R-4
Programmable Inputs
Programmable Outputs
50-1
50-1
50-1
50-1
52-3
52-2
52-4
Trip Signal
M-3311A
Digital
Feeder
Protection
OUT2
Figure 4-67 Digital Feeder Relay Backup
Scheme
Backup for Digital feeder Relay Failure
The M-3311A Transformer Protection Relay can
provide backup for digital feeder relays (see Fig
-
ures 4-67 and 4-68). The backup feature is initiated
by the closure of a feeder relay’s self-test error
contact. This scheme assumes that some sort of
contact multiplying is done on the self-test outputs.
A multiplied, normally open self-test contact can
be paralleled with all feeder relays to initiate the
backup feature.
Example
In this example, the Negative Sequence Overcur
-
rent (46) Function is used to provide the backup
protection. Use of the 46 Function allows for sen
-
sitive backup protection independent of the load
current. If the 51 Function is used, it must be set to
coordinate with the load current and results in less
sensitive protection.
This application requires no special logic to imple-
ment. The scheme is enabled using the 46 Function
basic settings through a user-selected control input,
configured such that the 46 Function is blocked by
an open contact. The parallel contacts from the
feeder self-test are wired to that input (see Figure
4-68). The negative sequence function is set to co
-
ordinate with the downstream devices of the feeders
on the protected bus.
Designated by
Figure 4-68 Feeder Backup Logic
With no feeder alarms, the paralleled self-test
alarm contacts will all be open, and the Negative
Sequence Overcurrent function blocked. When a
feeder relay fails and its self-test contact closes, the
Negative Sequence overcurrent function is enabled
(unblocked), and the contact stream establishes a
trip path to the failed relay breaker trip circuit. The
Negative Sequence relay will then provide backup
protection to the failed relay circuit.
Содержание M?3311A
Страница 1: ...Instruction Book M 3311A Transformer Protection Relay ...
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Страница 67: ...M 3311A Instruction Book 2 12 Path Monitor Metering ll Figure 2 9 Metering II Screen 4 Winding ...
Страница 87: ...M 3311A Instruction Book 2 32 This Page Left Intentionally Blank ...
Страница 89: ...M 3311A Instruction Book 3 2 Figure 3 2 IPScom Main Screen ...
Страница 93: ...M 3311A Instruction Book 3 6 Figure 3 8 Terminal Window Figure 3 7 IPScom Modem Communication Dialog Screen ...
Страница 99: ...M 3311A Instruction Book 3 12 Path Monitor Metering ll Figure 3 14 Metering II Screen 4 Winding ...
Страница 103: ...M 3311A Instruction Book 3 16 Path Monitor Phasor Diagram F87T Figure 3 18 Phasor Diagram F87T 4 Winding ...
Страница 107: ...M 3311A Instruction Book 3 20 Figure 3 22 Setup System Dialog Screen 2 3 Winding ...
Страница 108: ...IPScom 3 3 21 Figure 3 23 Setup System Dialog Screen 4 Winding ...
Страница 112: ...IPScom 3 3 25 Figure 3 29 I O Map Screen 4 Winding ...
Страница 114: ...IPScom 3 3 27 Figure 3 31 Display All Setpoints Screen 4 Winding ...
Страница 119: ...M 3311A Instruction Book 3 32 Figure 3 38 View Sequence of Events Recorder Screen ...
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Страница 150: ...4 23 System Setup and Setpoints 4 Figure 4 14 Setup Sequence of Events Recorder Dialog Screen ...
Страница 163: ...4 36 M 3311A Instruction Book Figure 4 15 IPScom Relay Setup System Dialog Screen 2 3 Winding ...
Страница 164: ...4 37 System Setup and Setpoints 4 Figure 4 16 IPScom Relay Setup System Dialog Screen 4 Winding ...
Страница 166: ...4 39 System Setup and Setpoints 4 Figure 4 18 IPScom Selection Screen for Input Settings ...
Страница 179: ...4 52 M 3311A Instruction Book Figure 4 28 Example of V Hz Capability and Protection Curves ...
Страница 187: ...4 60 M 3311A Instruction Book Figure 4 33 49 Function Overload Curves ...
Страница 229: ...4 102 M 3311A Instruction Book Table 4 5 Transformer Connections ...
Страница 231: ...4 104 M 3311A Instruction Book Table 4 7 Custom Transformer and CT Configuration ...
Страница 233: ...4 106 M 3311A Instruction Book CONNECTION EXAMPLES Figure 4 72 Typical Transformer Differential Application ...
Страница 234: ...4 107 System Setup and Setpoints 4 AUXILIARY TRANSFORMER EXAMPLE Figure 4 73 Delta ac Wye Wye CT Connection Diagram ...
Страница 236: ...4 109 System Setup and Setpoints 4 GSU TRANSFORMER EXAMPLE Figure 4 75 Wye Delta ac Delta ac CT Connection Diagram ...
Страница 243: ...M 3311A Instruction Book 5 6 Figure 5 5 Mounting Dimensions for GE L 2 Cabinet H3 and H4 ...
Страница 275: ...M 3311A Instruction Book 5 38 Dip Switch J46 J60 J61 J5 J20 J21 J22 J18 Figure 5 34 M 3311A Circuit Board Standard I O ...
Страница 383: ...A 50 M 3311A Instruction Book This Page Left Intentionally Blank ...
Страница 389: ...M 3311A Instruction Book B 6 This Page Left Intentionally Blank ...
Страница 393: ...D 2 M 3311A Instruction Book Figure D 1 Volts Hz 24IT Inverse Curve Family 1 Inverse Square ...
Страница 394: ...Inverse Time Curves Appendix D D 3 Figure D 2 Volts Hz 24IT Inverse Family Curve 2 ...
Страница 395: ...D 4 M 3311A Instruction Book Figure D 3 Volts Hz 24IT Inverse Time Curve Family 3 ...
Страница 396: ...Inverse Time Curves Appendix D D 5 Figure D 4 Volts Hz 24IT Inverse Curve Family 4 ...
Страница 399: ...D 8 M 3311A Instruction Book Figure D 5 Definite Time Overcurrent Curve ...
Страница 400: ...Inverse Time Curves Appendix D D 9 Figure D 6 Inverse Time Overcurrent Curve ...
Страница 401: ...D 10 M 3311A Instruction Book Figure D 7 Very Inverse Time Overcurrent Curve ...
Страница 402: ...Inverse Time Curves Appendix D D 11 Figure D 8 Extremely Inverse Time Overcurrent Curve ...
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