Selectivity and cascading solve different problems Selectivity aims to keep a fault local by allowing the protective device closest to the fault to operate without unnecessarily opening an upstream device....Read More
Running current is only part of the starter duty A motor starter can carry a motor continuously and still be unsuitable for the way a machine actually operates. Frequent starts,...Read More
What is the difference between a 3-pole and 4-pole MCCB? A 3-pole MCCB switches and protects the three phase conductors. A 4-pole MCCB also switches the neutral, but the neutral...Read More
What is the difference between Type AC, A, F and B RCCBs? RCCB type selection should begin with the residual-current waveform that the connected equipment is capable of producing. Type...Read More
What is the difference between Type 1 and Type 2 motor starter coordination? Type 1 and Type 2 coordination define the acceptable condition of a motor starter after a short...Read More
How do you choose the correct 3-core flat cable size for a submersible pump? Select a submersible-pump cable from the motor’s rated current, starting current, complete cable length, conductor material,...Read More
