"What is electrical switchgear"
Electrical switchgear is a key component in electrical power systems and is used to both distribute electrical power and to selectively isolate electrical loads.

"How to choose the right switchgear"
Visit the wiki page "Choice of Switchgear" which will guide you to choose the right switchgear for you.

"Do we need to monitor the switchgear conditions"
Yes, Because switchgear distributes electrical current, heat build-up becomes an important characteristic to monitor. In particular, unexpected temperature rise at a particular location could indicate corrosion or some other type of defect. Thermal effects are especially visible in medium voltage switch gears used in distribution networks, where electrical currents may rise to few thousands of amperes. Thus keeping switchgears in proper condition over their long life becomes a critical issue.

"How to monitor the switchgear"
Currently, switchgear bus temperature monitoring is either done periodically by manual inspections using IR cameras or is implemented by fibre-optic systems. Both have limitations like inaccurate and infrequent readouts, high implementation cost and limited monitoring area. In this paper a modern
approach to implementation of condition monitoring is presented. The new design is based on passive, SAW-based, wireless sensors, reducing installation costs and enhancing monitoring by allowing measurements in previously unreachable locations. (Refer the article present in the attachment section presented by "M. BUDYN1, H. M. KARANDIKAR2, M. G. URMSON3 ABB Corporate Research1(PL), ABB Inc.2,3 (USA)" which shows a practical implementation of the wireless condition monitoring system as a part of a general, built-in, switchgear diagnostics and maintenance system.)

"Ultra-rapid circuit breaker"

As installed power increases, electrical distribution has to shift from a LV design to a HV design. Indeed, a high short-circuit level can be a threat to the installation and make impossible the selection of low voltage equipments (Switchboard and bus bars, circuit breaker…)

These situations could be met in the following applications:
Bus bars coupling on board merchant vessels, off shore platform, loop networks (in industry), where the current and energy are important because of the installed power (several transformers or generators in parallel) and HV design not easy.

Two solutions could be used:

- Pyrotechnic interruption switching device

- Power circuit breaker based solution

Some power circuit breakers with additional feature (based on the Thomson effect technology for instance) provide an ultra rapid opening system on very high short-circuit level. The breaking performance makes it possible to limit the short-circuit current and prospective energy, and consequently protect the electrical installation against the electrodynamic and thermal effects of short-circuit.

You can get additional information from the wiki link "http://www.electrical-installation.org/wiki/Circuit-breaker#Ultra-rapid_circuit_breaker"


What safety we need to follow in electrical testing: Switchgear and control gear?
Refer the document in the attachment section on the same published by Health and Safety Executive

Two Reasons why the Circuit Breaker Panel will trip?
Refer the document in the attachment section on the same..

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Are you searching for electrical manuals???
Here is the site of interesting to you "http://www.electricalmanuals.net"

Are you curious about to know on how the Circuit Breaker Testing happens?
Follow the attachment on circuit breaker testing technology to know more about testing.

Where can i get to know more about Vacuum Interrupters and how it plays a major role in Vacuum Circuit Breakers?
Follow the attachment on VCB_Vacuum Interrupters how they work to know more about the same

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How do I decide the Size of the Circuit Breaker?
Read the simple article with example from the attachment section named "Sizing the Circuit Breaker"