Transformers – Single Phase Type
Transformers are most commonly ‘step-down’ types.
This means that the voltage that comes out is less than the voltage going into the transformer.
education
Marine Induction Motor Servicing Tips
Marine installations typically operate at an even higher 440 Volt Alternating Current (440 VAC).
Never work on a piece of three-phase machinery, such as an induction motor unless you are both qualified to do so, and have authorisation.
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Schools radio audit
Radio communications is often used by schools to communicate between the office and the playground, but does it need a free audit ? Many systems in use can be easily eavesdropped on by strangers, which has possible safeguarding issues. We are offering schools a free onsite audit of their two-way radio equipment. To register email: …
Star-Delta Starter
A Star-Delta (or Wye-Delta) starter is used in electrical engineering to start larger three phase motors, typically over 4 KW (5 HP). The Star-Delta starter is chosen, rather than the cheaper D.O.L (Direct On Line) for larger motors, because when a motor is started a surge current is generated for a short initial period. This …
Comparison of True Versus Reactive Power
Comparison of True Versus Reactive Power When a resistive load is connected, no phase shift is occurs between the voltage and current. The Power that is the result of the resistive load performs work in the circuit. This is known as “true” power, and is measured in watts. By comparison, an inductive load causes a 90-degree …
Inductive Loads
Inductive loads are loads from electrical equipment. Electricity circulates through coiled or wound wire. An inductor is a component which produces a magnetic field, when a current is passed through it. Examples include relays, motors, solenoids, & transformers. As a general rule, if an electrical load involves movement, it is classed as being an …
Resistive Loads
Resistive loads are most often are found in circuits where electricity produces heat, light, or both forms of energy, Resistive loads do not produce movement.