Electrical Engineering Guides

Power Systems

Protective Multiple Earthing (PME) – TN-C-S – (MEN) and PNB

What is Protective Multiple Earth (PME)? Protective Multiple Earth (PME) is a safety grounding method where the earth continuity conductor (ground wire) in a consumer rsquo;s premises is connected to both the local earthing system and the neutral conductor of the power supply. Also known as TN-C-S o

By Edwiin 05/16, 2025
Power Systems

Can the Neutral Wire Cause Electric Shock? Different Cases

What is the Neutral Wire? The neutral wire is a conductor that facilitates the return of current to the electrical source, thus completing the electric circuit. In a standard electrical system, power is delivered via the ldquo;HOT rdquo; wire (also referred to as the Line, Live, or Phase wire), whil

By Edwiin 05/16, 2025
Power Systems

Deflection Type Instrument

Definition Instruments in which the measured quantity generates physical effects that deflect or displace the moving system are known as deflection-type instruments. In other words, these instruments use the deflection of a moving component as the basis for measuring electrical quantities, making th

By Edwiin 05/16, 2025
Power Systems

Rectifier Type Instrument

Definition Instruments that utilize a rectifying element to measure voltage and current are known as rectifying instruments. The rectifying element converts alternating current (AC) into direct current (DC), which is then indicated by a DC-responsive meter. A Permanent Magnet Moving Coil (PMMC) inst

By Edwiin 05/16, 2025
Power Systems

Online GIS PD monitoring system according to IEC61850 protocol

Partial Discharge (PD) Detection in GIS Both UHF (Ultra-High Frequency) and ultrasonic methods are effective for detecting partial discharges (PD) in Gas-Insulated Switchgear (GIS), each with distinct advantages: UHF Method : Detects PD pulses via high-frequency electromagnetic waves generated by PD

By Edwiin 05/16, 2025
Power Systems

Why Doesn’t a Standard Breaker Protract Against Ground Faults?

A broken neutral in a circuit with a standard breaker poses a shock hazard because the breaker does not monitor or protect the neutral wire. The internal mechanism of a standard breaker is not designed to detect ground-fault currents during operation. Standard circuit breakers are engineered to prot

By Edwiin 05/16, 2025
Power Systems

What is Hygrometer？

Definition A hygrometer is used to measure the humidity in the surrounding environment, where "humidity" refers to the amount of water vapor in a gas. Hygrometers operate on the principle that the physical properties of materials change in response to humidity, enabling measurement. Humidity is clas

By Edwiin 05/16, 2025
Power Systems

Photoelectric Transducer

Definition A photoelectric transducer is a semiconductor device that converts light energy into electrical energy. It employs a photosensitive element that emits electrons when struck by light, altering the element rsquo;s electrical properties and inducing a current proportional to the intensity of

By Edwiin 05/16, 2025
Power Systems

Measurement of Resistance using Potentiometer

DC Potentiometer Method for Resistance Measurement The DC potentiometer method is employed to measure low-value unknown resistances by comparing them with a standard resistance. This involves measuring the voltage drops across both the known (standard) and unknown resistances, then determining the u

By Edwiin 05/16, 2025
Power Systems

Platinum Resistance Thermometer

Definition A Platinum Thermal Resistance (PTR), also known as a Platinum Resistance Thermometer (PRT), utilizes platinum as the sensing material to measure temperature. Its operation is grounded in the principle that the electrical resistance of platinum varies predictably with temperature changes.

By Edwiin 05/15, 2025
Power Systems

How Does a Standard Breaker Respond to Electrical Fault?

Circuit Breaker Operation for Fault Protection A standard circuit breaker is a critical safety device designed to interrupt electrical current during faults, such as overloads or short circuits, thereby preventing damage to the electrical system, overheating of wires, and fire hazards. Its protectiv

By Edwiin 05/15, 2025
Power Systems

Hot Wire Anemometer

Definition A Hot Wire Anemometer is a device used to measure the velocity and direction of a fluid flow by quantifying the heat loss from a heated wire exposed to the fluid stream. The wire is heated via an electric current, and its temperature change mdash;caused by heat transfer to the fluid mdash

By Edwiin 05/15, 2025

Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

All

Protective Multiple Earthing (PME) – TN-C-S – (MEN) and PNB

Can the Neutral Wire Cause Electric Shock? Different Cases

Deflection Type Instrument

Rectifier Type Instrument

Online GIS PD monitoring system according to IEC61850 protocol

Why Doesn’t a Standard Breaker Protract Against Ground Faults?

What is Hygrometer？

Photoelectric Transducer

Measurement of Resistance using Potentiometer

Platinum Resistance Thermometer

How Does a Standard Breaker Respond to Electrical Fault?

Hot Wire Anemometer

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