ABB MS132 - Page 4

MANUAL MOTOR STARTER GUIDE
APRIL 19 4/80
3.2.8 Torque .................................................................................................................................................................................. 39
3.3 Hermetic refrigerant compressor motors ............................................................................................................................40
3.4 Lamps and lighting loads ......................................................................................................................................................... 41
3.5 Transformers ............................................................................................................................................................................... 41
3.5.1 Primary-side protection of transformers ..................................................................................................................... 41
3.5.2 Secondary-side protection of transformers. .............................................................................................................. 41
3.6 Capacitors .................................................................................................................................................................................... 42
4. Environmental and application-specific factors ........................................................................................................... 43
4.1 Ambient air temperature compensation and derating ...................................................................................................... 43
4.2 Duty cycles and restarting .......................................................................................................................................................44
4.3 Frequencies and direct current (DC) ...................................................................................................................................... 45
5. Selection criteria ............................................................................................................................................................... 46
5.1 Sizing manual motor starters for motor applications ....................................................................................................... 46
5.2 Selected Optimized Coordination (SOC) .............................................................................................................................. 46
6. Installation and commissioning ....................................................................................................................................... 48
6.1 Mounting ...................................................................................................................................................................................... 48
6.1.1 Mounting position and minimum distances ................................................................................................................ 48
6.2 Connection ................................................................................................................................................................................... 49
6.2.1 Connection Types .............................................................................................................................................................. 49
6.2.2 Connection cross sections .............................................................................................................................................. 49
6.3 Motor current setting procedure ............................................................................................................................................ 51
6.4 Overload trip test ....................................................................................................................................................................... 51
6.5 Restart after tripping ................................................................................................................................................................ 51
6.6 How to lock a manual starter by disconnecting ................................................................................................................. 52
6.7 Installation instructions ............................................................................................................................................................ 52
6.8 2D drawings and 3D models .................................................................................................................................................... 52
7. Requirements for North America ..................................................................................................................................... 53
7.1 General certification in North America .................................................................................................................................. 53
7.1.1 Product certification marks ............................................................................................................................................. 53
7.1.2 Joint U.S.-Canadian approvals......................................................................................................................................... 54
7.1.3 Relevant North American standards .............................................................................................................................. 54
7.1.4 Global harmonization efforts .......................................................................................................................................... 55
7.1.5 Categorizing manual motor starters ............................................................................................................................. 55
7.1.6 Selecting the right Short Circuit Current Ratings (SCCR) level for your UL application .................................... 57
7.2 North American voltage supply networks and load types ................................................................................................ 58
7.2.1 North American voltages .................................................................................................................................................. 58
7.2.2 Three-phase network configurations ............................................................................................................................ 58
7.2.3 Straight vs. slash voltage ratings ................................................................................................................................... 59
7.2.4 Short-circuit current ratings ........................................................................................................................................... 59
7.2.5 Components requiring short-circuit current ratings ................................................................................................. 59
7.2.6 Standard (low) fault ratings - Mandatory .................................................................................................................... 60
7.2.7 High fault ratings - Optional ............................................................................................................................................ 60
7.2.8 Defined acceptance criteria ............................................................................................................................................ 61
7.2.9 Calculating the available fault current for a facility ................................................................................................... 61
7.2.10 Additional current limiting devices .............................................................................................................................. 62
7.3 Defining branch circuits ............................................................................................................................................................ 62
7.4 Functional requirements for all motor branch circuits ...................................................................................................... 63
7.4.1 Disconnect means for the motor and branch circuit ................................................................................................. 64
7.4.2 Short-circuit and ground-fault protection for the motor and branch circuit ...................................................... 64
7.4.3 Motor control means ........................................................................................................................................................ 64
7.4.4 Overload protection for the motor and branch circuit ............................................................................................. 64
7.4.3 Local motor disconnect ................................................................................................................................................... 64
7.5 Product offering for north American applications ............................................................................................................. 65
7.6 Suitable applications for manual motor starters for North America ............................................................................. 66