Answer Posted / thowsif_emerson
An isolation transformer is a transformer, often with
symmetrical windings, which is used to decouple two
circuits. An isolation transformer allows an AC signal or
power to be taken from one device and fed into another
without electrically connecting the two circuits. Isolation
transformers block transmission of DC signals from one
circuit to the other, but allow AC signals to pass. They
also block interference caused by ground loops. Isolation
transformers with electrostatic shields are used for power
supplies for sensitive equipment such as computers or
laboratory instruments.
In electronics testing, troubleshooting and servicing, an
isolation transformer is a 1:1 power transformer which is
used as a safety precaution. Grounded objects near the
device under test (desk, lamp, concrete floor, oscilloscope
ground lead, etc.) may be at a hazardous potential
difference with respect to that device. By using an
isolation transformer, the bonding is eliminated, and the
shock hazard is entirely contained within the device.
Isolation transformers are also used for the power supply
of devices not on ground potential. A well-known example is
the Austin transformer for the power supply of air-traffic
obstacle lamps on mast radiators insulated against ground.
Isolation transformers are commonly designed with careful
attention to capacitive coupling between the two windings.
This is necessary because excessive capacitance could also
couple AC current from the primary to the secondary. A
grounded shield is commonly interposed between the primary
and the secondary. This greatly reduces the coupling of
common-mode noise present on supply conductors.
Differential noise can magnetically couple from the primary
to the secondary of an isolation transformer. This requires
other measures, such as a filter, to block differential
noise from the secondary of an isolation transformer.
Is This Answer Correct ? | 13 Yes | 1 No |
Post New Answer View All Answers
either water sensor or flow meter,how we observe the water level, f any other equipment are in market ?
What are the basic elements used for modeling mechanical rotational system?
When lag/lead/lag-lead compensation is employed?
What is meant by Low Resistance Cable and High Resistance Cable.
Control cables in S's will carry 1000v which is AC R DC? Pls answer meĀ
WHAT IS THE FORMULA FOR CALCULATING CURRENT RATING(DIRECT IN GROUND OR AIR) OF ARMOURED(XLPE) CABLE OF 4C,16Sqmm?
Cb closed condition if there is a tcs fail whether cb will trip or not
What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.
WHAT CAUSED THRESHOLD VOLTAGE TO EXIST?
1.What is captive power plant? 2.What is national grid?Give brief idea.
If the earth is a good conductor of electricity, why don't people get shocked every time they walking on earth?
If there are two transformer having rating of 2.5mva, 6.6kv/440v(satr-star),and the load is 600kw then what is better to maintain less losses in transformer having both transformer in parellel or only single transformer connected to load? Please give calculated answer
why a tester wont shock while testing the power in house
What is diversity factor in electric installations?
if any house we instaled a 1.5 ton ac and its phase cable of wiring is installed but netrual cable of wiring not instaed. my question is that is neutual of house(for other wiring is capable for ac load or a sepeart neutrual wiring required