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[dwocpki2-080213-01.tif, 1, en_US]
Figure 12-2
Operate Curves and Dropout-Time Characteristic Curves According to IEC
Technical Data
12.6 Overcurrent Protection, Phases
810
SIPROTEC 5, Merging Unit 6MU85, Manual
C53000-G5040-C074-1, Edition 01.2020
32
34
Table of Contents
Main Page
Preface
3
12Â Technical Data
8
12.1Â General Device Data
10
12.1.1Â Analog Inputs
10
12.1.2Â Supply Voltage
13
12.1.3Â Binary Inputs
15
12.1.4Â Relay Outputs
16
12.1.5Â ETH-BD-2FO
18
12.1.6Â Design Data
20
12.2Â Date and Time Synchronization
24
12.3Â Circuit-Breaker Failure Protection
25
12.4Â Circuit-Breaker Restrike Protection
27
12.5Â Circuit-Breaker Supervision
28
12.6Â Overcurrent Protection, Phases
29
12.6.1Â Stage with Definite-Time Characteristic Curve
29
12.6.2Â Stage with Inverse-Time Characteristic Curve
31
12.7Â Overcurrent Protection, Ground
39
12.7.1Â Stage with Definite-Time Characteristic Curve
39
12.7.2Â Stage with Inverse-Time Characteristic Curve
40
12.8Â Directional Overcurrent Protection, Phases
48
12.8.1Â Stage with Definite-Time Characteristic Curve
48
12.8.2Â Stage with Inverse-Time Characteristic Curve
49
12.9Â Directional Overcurrent Protection, Ground
52
12.9.1Â Stage with Definite-Time Characteristic Curve
52
12.9.2Â Stage with Inverse-Time Characteristic Curve
53
12.10Â Voltage Protection
56
12.10.1Â Overvoltage Protection with 3-Phase Voltage
56
12.10.2Â Overvoltage Protection with Positive-Sequence Voltage
58
12.10.3Â Overvoltage Protection with Negative-Sequence Voltage
58
12.10.4Â Overvoltage Protection with Zero-Sequence Voltage/Residual Voltage
59
12.10.5Â Overvoltage Protection with Any Voltage
61
12.10.6Â Undervoltage Protection with 3-Phase Voltage
62
12.10.7Â Undervoltage Protection with Positive-Sequence Voltage
64
12.10.8Â Undervoltage Protection with Any Voltage
65
12.10.9Â Overvoltage Protection with Negative-Sequence Voltage/Positive-Sequence Voltage
66
12.11Â Inrush-Current Detection
68
12.12Â 2nd Harmonic Detection Ground
70
12.13Â External Trip Initiation
71
12.14Â Automatic Reclosing
72
12.15Â Current-Jump Detection
73
12.16Â Voltage-Jump Detection
74
12.17Â Measuring-Voltage Failure Detection
75
12.18Â Voltage-Transformer Circuit Breaker
77
12.19Â Voltage-Balance Supervision
78
12.20Â Voltage-Sum Supervision
79
12.21Â Voltage Phase-Rotation Supervision
80
12.22Â Current-Balance Supervision
81
12.23Â Current-Sum Supervision
82
12.24Â Current Phase-Rotation Supervision
83
12.25Â Temperature Supervision
84
12.26Â Instantaneous Tripping at Switch onto Fault
85
12.27Â Broken-Wire Detection
86
12.28Â Trip-Circuit Supervision
87
12.29Â Analog Channel Supervision via Fast Current Sum
88
12.30Â Operational Measured Values and Statistical Values
89
12.31Â Analog-Units Function Group
93
12.32Â Phasor Measurement Unit
94
12.33Â Measuring Transducers
95
12.34Â Arc Protection
96
12.35Â Synchronization Function
97
12.36Â Closing-Circuit Supervision
99
12.37Â Circuit-Breaker Wear Monitoring
100
12.38Â CFC
101
12.39Â SIPROTEC 5 Process-Bus Client
105
12.40Â SIPROTEC 5 Merging Unit Functionality
106
12.41Â Point-on-Wave Switching
107
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