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CHAPTER 6: SETPOINTS PROTECTION ELEMENTS
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL 6–35
6.3.2 Mechanical protection
Select the Home > Setpoints > Protection > Mech page to edit the mechanical protection
setpoints.
Figure 27: Mechanical protection configuration setpoints
The mechanical protection setpoints are divided into the following categories.
• Mechanical jam
• Undercurrent protection
• Underpower protection
• Acceleration protection
• Open control circuit trip.
The setpoints applicable to each of these categories are described in the following
sections.
6.3.2.1 Mechanical jam
After the motor has started and reached a running state, the mechanical jam element (if
enabled) produces a trip when the magnitude of Ia, Ib, or Ic reaches or exceeds the pickup
level for the time specified by the
Mechanical Jam Delay setpoint. This feature may be used
to indicate a stall condition when running. Not only does it protect the motor by taking it
off-line faster than the thermal model (overload curve), it may also prevent or limit damage
to the driven equipment if motor starting torque persists on jammed or broken equipment.
The
Mechanical Jam Level should be set higher than motor loading during normal
operation, but lower than the motor stall level. Normally the delay is set to the minimum
time delay or to avoid nuisance trips due to momentary load fluctuations.
The following setpoints are available for the mechanical jam element.
Mechanical Jam Level
Range: 1.01 to 4.50 × FLA in steps of 0.01 or OFF
Default: OFF
This setpoint specifies the current pickup level. Set this value to “OFF” to disable
mechanical jam protection.
Mechanical Jam Delay
Range: 0.1 to 30.0 seconds in steps of 0.1
Default: 0.1 seconds
This setpoint specifies the time that the motor current must reach or exceed pickup to
generate a mechanical jam trip.
- Instruction manual 1
- Motor Management System 1
- Table of Contents 3
- Chapter 1: Introduction 7
- Figure 2: Single line diagram 9
- 1.1.3 MM300 order codes 10
- 1.2 Specifications 12
- 1.2.4 Control specifications 14
- 1.2.5 Inputs specifications 14
- 1.2.6 Outputs specifications 16
- CERTIFICATION 17
- TYPE TESTS 17
- DIMENSIONS 17
- OPERATING ENVIRONMENT 18
- Chapter 2: Installation 20
- 2.1.2 Product identification 21
- 2.1.3 Mounting 21
- CAUTION: 22
- Figure 5: DIN rail mounting 23
- 853727A1.CDR 24
- 853733A1.CDR 25
- 853734A1.CDR 25
- 2.2.1 Power supply module 28
- 2.2.2 CPU module 28
- MM300 IED 31
- 853745A1.CDR 31
- 2.2.3 Protection modules 32
- Core Balance (Zero Sequence) 33
- 2.2.3.2 Two CT configuration 34
- FUSES - 100 ma typical 35
- 2.2.4 Input/output modules 36
- Consumer & Industrial 39
- Multilin 39
- 2.3 Starter types 40
- Low Voltage 41
- 2.3.3 Two-speed starter 42
- 2.3.6 Soft starter type 48
- 3.1.1.1 Graphical display 51
- 3.1.1.2 Keypad 52
- 3.1.1.3 Control keys 54
- 3.1.1.4 LED indicators 54
- Main menu 55
- Level 1 Level 2 Level 3 55
- 3.1.2.1 Home display page 56
- 3.1.2.2 Default display 56
- 3.1.2.3 Actual values pages 56
- 3.1.2.4 Status pages 57
- 3.1.2.5 Setpoints pages 59
- 3.1.2.6 Diagnostics pages 60
- 3.1.2.7 Control page 61
- 3.1.2.8 Popup windows 61
- 3.1.3.2 Numeric setpoints 63
- 3.1.3.5 Security access 65
- 3.2 Basic control panel 66
- Chapter 4: Software operation 68
- 4.1.1 Software requirements 69
- USB port: 71
- 4.2 Power analysis 76
- 4.2.2 Data logger 79
- Chapter 5: Actual values 82
- 5.2 Metering 83
- 5.2.3 Power metering 84
- 5.2.4 Sensor metering 84
- 5.3 Status 85
- 5.3.3 System Page 86
- 5.3.4 Flex Page 86
- Chapter 6: Setpoints 88
- 6.2 Configuration setpoints 90
- Full Voltage Non-reversing 92
- Full Voltage Reversing 92
- Two Speed Starter 92
- Wye-Delta Starter 92
- 853717A1.CDR 93
- 6.2.1.4 Two-speed starter 94
- 853719A1.CDR 95
- 6.2.1.6 Inverter starter 96
- 853721A1.CDR 97
- 6.2.1.7 Soft starter 98
- 6.2.3 Inputs 101
- 6.2.4 Outputs 102
- 6.2.6 System 107
- 6.2.7 Events 109
- 6.2.8 Waveforms 110
- 6.2.9 Datalog 110
- 6.2.10 Counters 111
- 6.3 Protection elements 113
- 6.3.1.1 Unbalance biasing 113
- 6.3.1.2 Hot/cold biasing 114
- 6.3.1.3 RTD biasing 115
- 6.3.1.4 Overload curve 116
- TIME IN SECONDS 117
- 6.3.1.5 Cooling rate 118
- Time (minutes) 119
- RTD Bias – 121
- Maximum T 121
- RTD Bias – Center T 121
- 6.3.2.1 Mechanical jam 122
- 6.3.3 Electrical protection 125
- Ground CT setpoint 126
- 6.3.3.3 Load increase alarm 127
- 6.3.3.4 Phase undervoltage 127
- 6.3.3.6 Phase overvoltage 128
- 6.3.3.7 Phase reversal 129
- 6.3.3.8 Fuse failure 129
- 6.3.4.1 RTD protection 130
- 6.4 Control elements 133
- 6.4.1.1 Auto/manual control 133
- Start Ctrl 135
- External Stop Action 136
- 6.4.2 Starting duty inhibits 137
- 6.4.3 Process interlocks 139
- 853703A1.CDR 140
- IL Function A setpoint 141
- 6.5 System security 144
- MM300 Motor Management System 146
- Chapter 7: Diagnostics 146
- EVENTS CHAPTER 7: DIAGNOSTICS 147
- 7.2 Digital counters 148
- 7.3 Phasors 150
- 7.4 Product information 151
- 7.5 Learned data 152
- 7.6 Waveform 153
- 7.7 Datalog 154
- Chapter 8: FlexLogic™ 156
- Chapter 9: Communications 162
- Appendix 164
- APPENDIX 165
- Section Number CHANGES 165
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