Answer / 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.

Answer / shiva

same as above

In supply RYB are mentioned. But in transformers, why they are mentioning XYZ?

3 Answers  

---

can we make a electric generator,which can not use any type of fuel,air,solar,gas,thermal,coal,petrol,etc and able to produce electrical energy (or self electricity generating generator)

0 Answers   NTPC,

---

what is nuetral grounding

2 Answers  

---

The iron loss in a 100kva transformer is 1 kw and full load copper losses are 2 kw, then what is maximum efficiency occure at a load?

3 Answers   MPSC,

---

What is the difference between XLPE & FRLS cables? Is FRLS cables is a type of XLPE cable or both r different?

5 Answers  

---

Is current scalar or vector?

11 Answers  

---

Why do we avoid electrical conduits in floors at apartments?

0 Answers  

---

Ohms law explain

1 Answers   Hetero,

---

In a incandescent bulb, if the glass is punctured, and then power is supplied, the tungsten filament blows up with a flash.Why?

2 Answers  

---

what is the difference between KW and KVA?

15 Answers  

---

75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?

0 Answers  

---

1. What does mean of "PS" stand for Diff. CT class? 2. What is the formula of KW for 1Phase load inturms of voltag,current & P.F.?

4 Answers   Hero Honda,

---