As an increasing number of devices get connected to the cyberspace, we are embarking on a new journey towards creating a fast-paced industry called the Internet of Things (IoT). In 2015, over 15.4 billion devices were connected to the internet, and the Information Handling Services (IHS) predicts that this number will go up to 30.7 billion by 2020. According to General Electric, IoT will add $10 to $15 trillion to the worldwide GDP growth by 2030.Thus, it is time for companies to think about the long-term implications of IoT on their businesses.The Internet of Things refers to a connected network of devices with an on/off switch to the internet. These devices can interact with the environment and other devices that are a part of the same network. Read More
How To Disconnect THOMAS Coupling From Induction Motor Hub?
Hi,
This post I would like to share video how to disconnect or dis-engage THOMAS Coupling from motor hub during maintenance works.In this video,technician plan to replace new bearing for the motor due to abnormal sound detected from bearing.Normally in industry or chemical plant,Thomas Coupling is the one of common application to connect electric motor as a drive and pump as a rotary equipment for the process.
The main reason why Thomas coupling are used :-
- To transmit power from one shaft to another, efficiently and effectively.
- To accommodate slight shaft misalignment which develop in service.
Thomas coupling application also can protect our equipment from mechanical damage and misalignment. Below several protection when using Thomas coupling :-
1. Absorb shock, vibration and pulsations.
2. Decrease cross load on bearings.
3. Accept load reversals.
4. Minimize backlash. Read More
ACTI 9 Miniature Circuit Breakers by SCHNEIDER ELECTRIC
Schneider Electric is the one of my favorite brand for electrical protection device.This time I want to share information about one of the Schneider Electric product.It is DIN rail modular Device- ACTI 9 Miniature Circuit Breaker by Schneider Electric.
DIN rail modular device have several range of products.Actually I want highlight about miniature circuit breaker ACTI 9 device that used widely in low voltage electrical installation.
Schneider Electric produce the high quality products with advance technology for low voltage circuit protection like Miniature circuit breaker (MCB).That why I always choose products from Schneider Electric to my electrical installation. read More
General Requirement For Circuit Breaker
Circuit protection is a mandatory items that we MUST consider carefully for Electrical Installation project.I will take a fully attention during sizing and follow standard requirement for circuit breaker.
If the circuit protection not function properly, it’s can cause a serious damage to equipment and personnel.On my last post,I had discussed about Circuit Breaker Sizing.
This time I want to share some information about general requirement for circuit breaker that commonly apply for Electrical Installation project.I hope this post can help to have a basic guideline during handle any project of electrical installation. read more
AC motor protection device
As we know,motor protection is one of the important criteria when we involve for AC motor installation,wiring and termination works.Commonly magnetic contactor,fuse, Molded case circuit breaker (MCCB) and overload relays are used for motor control device of induction motor.
In general ideal for motor protection,it have two basic protections always installed for every motor are Over-load protection and Short-circuit protection.For advance protection we can added for protection against unbalanced supply voltages, under voltage, reverse phase, over temperature and stalling etc. read more
Routine maintenace tests for circuit breaker
Circuit breaker is the important protection device for our application and electrical power supply system.It can save our equipment or machinery from damage from over current or overload matter.It also can save personal life who involve directly or indirectly with electrical application from electric shock.
How we can know the actual condition and reliability for our circuit breaker? Normally we must perform the routine maintenance tests to determine out circuit breakers are able to perform their basic circuit protective functions and in good condition.
This time i want share information about routine maintenance tests for circuit breaker.Below i listed 5 types of tests to determine and assuring that the circuit breakers are functionally.Please be caution before perform the tests are to be made only on breakers and equipment that are on de-energized mode ( power supply OFF ). read more
Low speed protection for A.C generator
For a given excitation,if speed of an A.C. generator is reduced then the output voltage would reduce also.In practice,this reduction in output voltage is sensed by the AVR ( Automatic voltage regulator ) which increases the excitation current to compensate.
However,the field forcing capabilities of the AVR which are necessary to maintain output voltage during rapid load changes,will permit an “over-excitation” condition to exist.
As the regulator is not speed ( or frequency) sensitive,field forcing would occur damage field windings and rotating diode.In order to safeguard the machine against this condition,particularly where low speed duty or idling is anticipated a LSP ( low speed protection ) unit is available to sense prolonged over-excitation and automatically insert current limiting resistance in the field circuit. read more
