All About Electric Fence Gates
An Electric Fence Gates is a barrier that uses electric shocks to deter animals and people from crossing a boundary. The voltage of the shock may have effects ranging from...
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Electrical Basics
Proper Sizing of Conductors
Proper sizing of conductors is determined by many factors such as industry standards, insurance requirements, local codes, etc. Proper Sizing of Conductors The following is based on many years of...
Testing and Inspection of Bonding and Grounding Systems
Bonding and grounding are very effective techniques for minimizing the likelihood of ignition from static electricity. A bonding system connects various pieces of conductive equipment and structures together to keep...
Variable Motor Speed Control
An alternative to control valves for adjusting fluid flow is to regulate the speed of the machine(s) motivating fluid to flow. In the case of liquid flow control, this would...
Motor VFD Drive features
Modern DC and AC motor drives provide features useful when using electric motors as final control elements. Some common features seen in both VSDs and VFDs are listed here: Speed...
Motor Control Circuit Wiring
A simple three-phase, 480 volt AC motor-control circuit is shown here, both in pictorial and schematic form. This entire assembly consisting of contactor, overload block, control power transformer, power fuses...
Motor Protection Circuits
An essential component of any high-power motor control circuit is some device to detect a condition of excessive overload and interrupt power to the motor before thermal damage occurs. A...
How Motor Star Delta Starter Works ?
Star-Delta starter is an electrical motor starting device, generally uses in big size motor to overcome high motor currents during starting. Star and Delta means here 2 separate states of...
Electrical Switches Principle & Types
Electrical Switches have mechanical contacts or relays. These types of switches can control a wider range of current and voltage options. They are not affected by dirt, mist, magnetic fields...
Motor Inrush Current Measurements
Why inrush current important ? Inrush current, sometimes known as starting current or locked rotor current in motors, can be four to 10 times higher than a motor’s running current....