Jan 22, 2005 · I don't see the difference between a contactor and a relay. Can anybody tell me what the difference is, when to use a relay over a contactor ? What are some criterias that need to be taken …

Apr 13, 2018 · I came across a contactor catalog saying "Definite purpose". Then tried to figure out the types of contactor. Came across definite purpose and general purpose. What is meant by definite …

Mar 22, 2016 · I have a 5v dc circuit and a 12v dc motor. If I had to use a relay, when looking at the specifications, what do I look for ?, will the coil voltage be 5v...

Dec 4, 2007 · Relay chattering is often caused by insufficient power supply leading to a drop in current when the relay engages, resulting in a rapid on-off cycle. Additionally, mechanical vibrations or poor …

Apr 7, 2019 · Hello everyone, here I have one problem, which I can not understand, can you please help me? In attachment you will find a basic star-delta diagram, with unreal calculation (Z is not real value, …

Oct 12, 2022 · I have been given an electrical chain hoist to repair. The symptom is that it suddenly stopped working. I have checked the motor's windings and they each show similar DC resistance of …

Nov 27, 2008 · Hi, I'm switching an inductive load. Let's say a DC motor (20 A continuous current, 40 A peak surge) is going full on in one direction. I want to shut it off. Its power circuit is switched by the …

Nov 23, 2025 · I am new here. Above all, I am passionately curious about fundamental physics.

May 3, 2025 · The discussion focuses on using LaTeX code to create circuit diagrams, specifically for an electrical relay with normally open (n/o) and normally closed (n/c) terminals. Users express that while …

4 days ago · Hi, I am a neurosurgeon from Turkey with an interest in physics. I don't have formal training in theoretical physics or advanced mathematics, but i enjoy trying to build intuition about spacetime. I …