Which is the killer current or voltage?
Answer: According to the sources I found, current kills, not voltage. But voltage is must to drive the current. I.e. Amperes are responsible for electrocution, Not the Volts¹. However, electric…
What’s the minimum distance between an MV cable (13.8kV) and a fiber optic cable?
What’s the minimum distance between an MV cable (13.8kV) and a fiber optic cable? The minimum distance between an MV cable (13.8kV) and a fiber optic cable varies depending on…
Which wire can carry a higher current?
Answer: Standard wire Stranded coz more wires in parallel strapped together carry more current but also has more heat
What’s the difference between Amps, Watts and Volts?
Amps, volts, and watts are three basic concepts in electrical engineering. They are used to describe the flow of electricity through a circuit and the amount of power consumed by…
What is NO and NC on a contactor?
-> Answer: NO and NC are abbreviations for Normally Open and Normally Closed respectively. They are used to describe the state of the contacts on a contactor when the coil…
Why are DC motors used in elevators?
DC motors are used in elevators because they usually have higher starting torque than AC motors. This is especially important for high-speed elevators. DC motors when series connected (the armature…
Why Neutral Cable Size is Half of Phase Cable?
The neutral wire is half the size of the phase wire because it carries only the imbalance current between phase A and phase B. The neutral wire is tied to…
What type of controller is based on relay control logic?
Relays can be used to make logical control decisions in motor control circuits. For example, a relay could be used to turn on a motor when a certain sensor is…
Why are the majority of solid-state relays constructed as single-pole devices?
Solid-state relays (SSRs) are electronic switches that use semiconductors to control the flow of electricity. They have no moving parts, unlike electromechanical relays (EMRs)
Electromechanical Control Relays
An electromechanical relay (EMR) is a switch that is operated by an electromagnet. It turns a load circuit on or off by energizing an electromagnet, which opens or closes contacts…