Specifications
5
Mini-Contactors
SK Series
Page
Standard Models ......................................................................................................................................................................... 6
Production Models ...................................................................................................................................................................... 7
Type Number Nomenclature (Magnetic Contactors and Thermal Overload Relays) .................................................................. 8
Ratings
Main Circuit Ratings ............................................................................................................................................................ 10
Auxiliary Circuit Ratings....................................................................................................................................................... 11
Operating Coil Voltages ....................................................................................................................................................... 12
Operating Coil Characteristics ............................................................................................................................................. 13
Performances ...................................................................................................................................................................... 14
AC-3 Breaking Current and Electrical Durability .................................................................................................................. 14
Protective Coordination
Coordination with Short-circuit Protection Devices (SCPD) (Based on IEC and JIS Standards) ........................................ 16
UL approved Short-circuit Current Ratings (SCCR) ............................................................................................................ 18
Normal Operating Conditions and Mounting ............................................................................................................................. 20
Wiring ........................................................................................................................................................................................ 21
Handling .................................................................................................................................................................................... 22
Magnetic Contactors
Features .............................................................................................................................................................................. 24
Ordering Information ........................................................................................................................................................... 24
Ratings and Types ............................................................................................................................................................... 24
Dimensions and Connection Diagrams ............................................................................................................................... 25
Reversing Magnetic Contactors
Features .............................................................................................................................................................................. 26
Ordering Information ........................................................................................................................................................... 26
Ratings and Types ............................................................................................................................................................... 26
Dimensions and Connection Diagrams ............................................................................................................................... 27
Thermal Overload Relays
Features .............................................................................................................................................................................. 28
Ordering Information ........................................................................................................................................................... 28
Ratings and Types ............................................................................................................................................................... 28
Ampere Setting Range Speciļ¬cation Codes ....................................................................................................................... 28
Auxiliary Circuit Ratings....................................................................................................................................................... 29
Operating Characteristics (Speciļ¬cations) .......................................................................................................................... 29
Operating Characteristics Curves (Average Values) ........................................................................................................... 30
Dimensions and Connection Diagrams ............................................................................................................................... 30
Optional Unit
Type Numbers and Product Codes...................................................................................................................................... 31
Auxiliary Contact Blocks ...................................................................................................................................................... 32
Mechanical Interlock Unit and Power Connection Kit for Reversing .................................................................................... 34
Main Circuit Surge Suppression Unit and Separate Installation Unit .................................................................................. 35
Coil Surge Suppression Units and Operation Indicator Lamps ........................................................................................... 36
Thermal Overload Relay Reset Releases ........................................................................................................................... 37
Link Module and Power Connection Kit for Reversing (Insert) ............................................................................................ 38
Auxiliary Relays ......................................................................................................................................................................... 40