Applicable to a.c. contactors and/or contactor-based motor-starters designed for indoor installation and operation at frequencies up to and including 60 Hz on systems having voltages above 1 000 V but not exceeding 12 000 V. Applicable only to three-pole contactors and starters for use in three-phase systems and single-pole contactors and starters for use in single-phase systems.
You easily download any file type for your device.IEC 60470 Ed. 2.0 b:2000, High-voltage alternating current contactors and contactor-based motor-starters | IEC TC/SC 17A. I have read it a couple of times and even shared with my family members. Really good. Couldnt put it down.