Miniature Circuit Breaker Trip Curves B, C and D Explained
B, C and D trip curves set the instantaneous trip range of a miniature circuit breaker. Learn the IEC 60898-1 ranges, see worked examples and choose...
Standards
Manual Motor Starters (MPCB): How They Work and How to Set Them
How manual motor starters (MPCBs) such as PKZM, GV2 and 140M combine overload and short-circuit protection, and how to set them to the motor full-load current.
How to Read Industrial Part Numbers and Nameplates Before You Order
Learn the difference between catalog and serial numbers, why series letters and voltage codes matter, and how to photograph a nameplate so you order the right...
Redes de suministro eléctrico y tipos de carga en América del Norte
A practical overview of North American supply systems, from 120/240 V split phase to 600Y/347 V in Canada, how loads connect, and why slash ratings matter.
Armónicos (energía eléctrica)
Harmonics are currents and voltages at multiples of the supply frequency, produced by drives, rectifiers and electronic loads. Learn how THD is defined and measured.
Clasificación de los contactores según las categorías de empleo IEC - Tipo de aplicación
What IEC utilization categories such as AC-1, AC-3, AC-4, AC-15 and DC-13 mean, with tables of typical applications and tips for comparing contactor ratings.
Tabla de tamaños y propiedades del calibre americano de alambre (AWG)
An American Wire Gauge table from 4/0 to 30 AWG, computed from the gauge definition, with copper resistance, voltage-drop examples and why ampacity must come from...
Capacidad de corriente de cortocircuito (SCCR)
What a short-circuit current rating is, how it differs from interrupting rating, and why one low-rated component can limit the SCCR of a whole control panel.
Normas y certificaciones norteamericanas
How North American electrical standards are organized (NEC, CEC, UL 508A, UL and CSA product standards) and how to read UL, cULus and CSA marks on...
Corriente nominal del motor según IEC - De acuerdo con IEC 60947-4-1 Anexo G - POTENCIA DEL MOTOR EN KW
How to read a kW-to-current table for IEC motors, use the nameplate correctly and convert kilowatts to horsepower.
Corriente nominal del motor UL / CSA - Según UL508
A practical guide to horsepower-to-FLA tables for three-phase motors and to the difference between nameplate current and code-table current in North America.
Instalación – Conmutadores: UL 98 / CSA C22.2 n.º 4 y UL 508 / CSA C22.2 n.º 14
UL 98 safety switches and UL 508 manual motor controllers can look alike, but the code allows them in different places. Learn where each may be...
