Monday, 20 March 2017
Saturday, 11 February 2017
Tuesday, 17 January 2017
Tuesday, 19 April 2016
Monday, 7 March 2016
How Transformers Work
It is important to remember that transformers do not
generate electrical power; they transfer electrical power from one AC circuit
to another using magnetic coupling. The core of the transformer is used to
provide a controlled path for the magnetic flux generated in the transformer by
the current flowing through the windings, which are also known as coils.
There are four primary parts to the basic transformer. The
parts include the Input Connection, the Output Connection, the Windings or
Coils and the Core.
Input Connections -
The input side of a transformer is called the primary side because the main
electrical power to be changed is connected at this point.
Output Connections -
The output side or secondary side of the transformer is where the electrical
power is sent to the load. Depending on the requirement of the load, the
incoming electric power is either increased or decreased.
Winding -
Transformers have two windings, being the primary winding and the secondary
winding. The primary winding is the coil that draws power from the source. The
secondary winding is the coil that delivers the energy at the transformed or
changed voltage to the load. Usually, these two coils are subdivided into
several coils in order to reduce the creation of flux.
Core - The
transformer core is used to provide a controlled path for the magnetic flux
generated in the transformer. The core is generally not a solid bar of steel,
rather a construction of many thin laminated steel sheets or layers. This
construction is used to help eliminate and reduce heating.
Transformers generally have one of two types of cores: Core
Type and Shell Type. These two types are distinguished from each other by the
manner in which the primary and secondary coils are place around the steel
core.
When an input voltage is applied to the primary winding,
alternating current starts to flow in the primary winding. As the current
flows, a changing magnetic field is set up in the transformer core. As this
magnetic field cuts across the secondary winding, alternating voltage is
produced in the secondary winding.
The ratio between the number of actual turns of wire in each
coil is the key in determining the type of transformer and what the output
voltage will be. The ratio between output voltage and input voltage is the same
as the ratio of the number of turns between the two windings.
A transformers output voltage is greater than the input
voltage if the secondary winding has more turns of wire than the primary
winding. The output voltage is stepped up, and considered to be a "step-up
transformer". If the secondary winding has fewer turns than the primary
winding, the output voltage is lower. This is a "step-down
transformer".
Monday, 8 February 2016
Electrical Testing and Commissioning
System Protection aims to provide testing and commissioning,
preventative maintenance of all projects related to Infrastructures, Industries,
and Power Plants etc new and existing plants in a cost effective manner. We
have the resources and personnel to carry out the following either on site or
in house;
·
HV & LV Switchboards
·
EHV Switchyards
·
Secondary Injection of Protection Relays
·
Calibration of Transducers
·
Primary Injection of Current Transformers
·
Insulation Resistance Tests
·
Control & Relay panel wiring, modification
& Retrofit
·
Earth Testing
·
Contact Resistance
·
Testing of High Voltage Equipment
·
Transformer Winding Resistance Testing
·
Cable and Cable Fault Locating
·
Polarization Index Tests
·
Power Transformer Testing
·
Circuit Breakers
·
Power Generators
·
Relay Testing using specialized OMICRON / DOBLE
Relay Test Set
We have dedicated qualified and experienced Managers,
Engineers and Supervisors to execute all Electrical Testing & Commissioning
Projects in a professional way and with in time schedules.
Engineering and
testing services
Our highly trained field testing engineers and technicians
offer you power system studies and complete engineering and testing services
for acceptance, maintenance, retrofit and electrical power distribution system
and equipment repair. Broad-line electrical services range from electrical
contracting through sophisticated evaluation, modernization and upgrading of electrical
distribution and control equipment.
Operation &
Maintenance
System Protection Operation and Maintenance (O&M) is
committed to provide flexible, integrated, dependable, cost effective and
responsive solutions for the Operation and Maintenance requirements of
Electrical power Systems. Regular maintenance ensures minimum down time, our
system of maintenance and planning matching each customer's requirements. Our
experienced engineers are your guarantee that costly production losses are
minimized. With our expertise in the field, we are here to provide excellent
service for Preventive and Break down Maintenance, Annual Maintenance, Relay
Calibration, Aging of transformers, System Health Check, Day to Day care of
System operation etc……
Engineering Project
System Protection enrolled by experienced senior engineers
who can provide best applicable solutions on detailed engineering , supervision
of Electrical installations and project management in highly standards for
industrial Electrical Projects.
Our Project engineers handle the site independently for
Installation supervision, Cable schedule preparations & modifications,
cable laying, Erection of Switchyards, Panels & Transformers, ESP and
coordination with Client and Contractors and Established cooperation with
international companies in the field of project managements
Monday, 1 February 2016
Subscribe to:
Posts (Atom)