CEI EN 60947-4-1/A1 PDF

INTRODUCTION

This amendment includes the following significant technical changes with respect to the previous edition 3 (2009):

• introduction of the motor management starter;

• definitions and measurement method of the power consumption of the control circuit during holding and pick-up operations;

• measurement method of the pole impedance;

• requirements for screwless terminals;

• performance requirements for latched contactors;

• alignments to Amendment 1 of IEC 60947-1:2007;

• harmonisation with IEC 60947-2 of the operation tests of under-voltage relays and shunt releases;

• short-circuit tests harmonisation with North America;

• test requirements for utilisation AC-6b capacitor load;

• polarity for DC contactors;

• dielectric test method in presence of built-in varistor;

• addition of an extended function for electronic overload relay: control functions.