Rockwell-automation 193-EC4 EC4 Current Monitoring Relay User Manual Manuale Utente Pagina 40
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Rockwell Automation Publication 193-UM011A-EN-P - September 2010 41
Protective Trip and Warning Functions Chapter 3
Undercurrent Protection
Motor current less than a specific level may indicate a mechanical malfunction in
the installation, such as a torn conveyor belt, damaged fan blade, broken shaft, or
worn tool. Such conditions may not harm the motor, but they can lead to loss of
production. Rapid undercurrent fault detection helps to minimize damage and
loss of production.
Undercurrent Warning
The EC4 Current Monitoring Relay will issue a warning with an undercurrent
condition if:
• The current in an of the phases is lower than the current specified for the
corresponding UC Trip Level parameter (Parameter 110 for L1, parameter
113 for L2, & parameter 116 for L3)
• No warning condition already exists
If an undercurrent warning parameter is satisfied, the following will occur:
• The TRIP/WARN LED will flash a yellow blinking pattern depending on
which phase encountered the undercurrent warning condition
– 2 blinks for L1 undercurrent
– 3 blinks for L2 undercurrent
– 4 blinks for L3 undercurrent
• Parameter 15, Wa r n i n g S t a t u s , will change
– Bit 1 will go to "1" for L1 undercurrent
– Bit 2 will go to "1" for L2 undercurrent
– Bit 3 will go to "1" for L3 undercurrent
• Bit 1 in Parameter 21, Device Status, will go to "1"
IMPORTANT
In EC4 Current monitoring relays, the Ground Fault warning function
does not include a time delay feature. Once the GF Inhibit Time has
expired, the Ground Fault warning indication is instantaneous.
Table 12 - Undercurrent Setting Ranges
Current Range [A] Min. [A] Max. [A] Default [A]
0.4…2 0.2 2 2
1…5 0.5 5 5
3…15 1.5 15 15
5…25 2.5 25 25
9…45 4.5 45 45
18…90 9 90 90
9…5000 5 5000 45
- EC4 Current Monitoring Relay 1
- Important User Information 2
- IMPORTANT 3
- DNET-UM072_-EN-P 4
- Table of Contents 5
- Product Overview 10
- Diagnostic Parameters 12
- Trip Relay 12
- Inputs and Outputs 12
- Status Indication 13
- Test/Reset Button 13
- Node Address Switches 14
- DeviceNet Compatibility 14
- Flash Memory 14
- Installation and Wiring 15
- Starter Installation 16
- Starter Assembly Instructions 17
- 193-EC_ _E) 18
- Cat. No. 193-EC_ _B) 20
- Cat. No. 193-EC_ _E) 21
- Power Terminals 22
- Terminal Designations 23
- Grounding 24
- Short-Circuit Ratings 24
- Fuse Coordination 25
- Typical Motor Connections 25
- Single-Phase Full-Voltage 26
- External Line Current 27
- Transformer Application 27
- Installation Instructions 28
- External Ground Fault 29
- Sensor Application 29
- E3 Plus Overload Relay 30
- Cat. No. 193-CBCT_ 30
- Ground Fault Sensor 30
- Cat. No. 193-CBCT1 31
- Typical Control Circuit 32
- Wiring Diagrams 32
- Single-Phase 33
- Three-Phase 33
- Warning Enable 35
- Overcurrent Protection 35
- Introduction 35
- Trip Enable 35
- Overcurrent Warning 36
- Overcurrent Trip 36
- Ground Fault Protection 37
- Ground Fault Setting Range 38
- Ground Fault Trip 38
- Ground Fault Trip Inhibit 39
- Ground Fault Warning 39
- Undercurrent Protection 40
- Undercurrent Trip 41
- Communication Fault 42
- Protection 42
- Communication Idle 43
- Comm Idle Warning 44
- Remote Trip 44
- Preventive Maintenance 45
- Diagnostics 45
- Queue Clearing 46
- DeviceNet Node Commissioning 47
- Using RSNetWorx for DeviceNet 48
- Figure 26 - EDS Wizard Screen 50
- Programmable Parameters 57
- Monitor Params (All 58
- Read-Only) 58
- Advanced Setup Group 60
- For Catalog Number 193-EC4ZZ 66
- Reset/Lock Group 71
- DeviceNet Setup Group 72
- Output Setup Group 75
- DeviceLogix Group 79
- Current Monitoring Parameters 81
- Reporting Accuracy 82
- Ground Fault Current 83
- Reporting 83
- Monitor Group 83
- Trip History and Snapshot 90
- Trip History Codes 92
- Warning History Codes 93
- Trip Snapshot 94
- Explicit Messaging 96
- (0x0375) 102
- Using DeviceLogix™ 104
- DeviceLogix Programming 105
- Troubleshooting 110
- Network Status LED 111
- OUT A & OUT B LEDs 111
- DeviceNet Modes of 112
- Operation 112
- Power-Up Sequence 112
- Run Mode 113
- Recoverable Error Mode 113
- Unrecoverable Error Mode 113
- Resetting a Trip 114
- Trip/Warn LED 114
- Procedures 114
- DeviceNet Troubleshooting 115
- Input and Output 115
- ➊ FRN 2.000 and later 116
- Specifications 117
- Table 4 - Input Ratings 118
- Environmental 119
- Table 9 - Protection 120
- DeviceNet Information 122
- Identity Object – Class 123
- Code 0x01 123
- Message Router – Class 124
- Code 0x02 124
- DeviceNet Object – Class 124
- Code 0x03 124
- Assembly Object – Class 125
- Code 0x04 125
- Input Assemblies 126
- Connection Object – Class 128
- Code 0x05 128
- Discrete Input Point Object 132
- – Class Code 0x08 132
- Discrete Output Point 132
- Object – Class Code 0x09 132
- Parameter Object – Class 133
- Code 0x0F 133
- Parameter Group Object – 135
- Class Code 0x10 135
- Control Supervisor Object – 139
- Class Code 0x29 139
- Acknowledge Handler 142
- Object – 0x2B 142
- DeviceNet Interface Object 143
- – Class Code 0xB4 143
- ODVA Fault Codes 144
- Logic Supervisor Object 145
- CLASS CODE 0x030E 145
- Status Object - CLASS 145
- CODE 0x0375 145
- CE Compliance 148
- Low Voltage Directive 149
- Two-Speed Applications 150
- Accessories 151
- Rockwell Automation Support 157
- Documentation Feedback 157
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