Quick answer: choose a 3-core flat cable from the pump’s rated and starting current, the complete one-way cable length, voltage-drop limits, conductor data, installation conditions, water exposure and fault-withstand requirements....Read More
Choosing between a 30 mA, 100 mA and 300 mA RCCB is not a matter of picking a 'better' sensitivity. The residual-current rating defines the leakage level at which the...Read More
Quick answer An MPCB should be set from the motor nameplate current, but the final setting is acceptable only when the motor can start without nuisance tripping and the complete...Read More
Quick answer Select an MPCB whose adjustable thermal range includes the motor nameplate current. Then confirm that the device can tolerate the motor's starting current, safely handle the prospective short-circuit...Read More
The short answer An MCB mainly protects branch conductors against overload and short circuit. An overload relay protects a motor against sustained overcurrent and, depending on the design, phase-loss or...Read More
Quick answer A limit switch can provide normally open (NO), normally closed (NC) or changeover contacts. In the normal, unoperated position, an NO contact is open and an NC contact...Read More
