Answer / s. puranik

Normally, CT is a Current Transformer. If the load current
is high, then this high current is allowed to pass through
its primary. Proportional load current is available at its
secondary. So a suitable meter can be connected to read the
secondary current which is proportional to the actual load
current. CT has its own capacity to give proportional
output current of its primary current. Upto certain
designed value CT gives proper proportional output of
primary current. But if primary current exeeds its primary
current designed value then CT does not respond to the
primary current proportionally but instead, the output
remains constant without any variations proportional to
primary or load current. This means CT is saturated.

Answer / rod

A CT saturates when a greater current is passed though it
than it was designed for, the way to test a CT (not design)
is to inject it with current until the curve flattens out,
the transistion curve is known as the knee point. It is not
calculated as such.

Answer / ramniveth

when we apply voltage between the secondary upto certain
limit it draws some mA exactly at the knee point the mA
will be double and if we cross the knee point then the CT
gets Saturated.
any of these effects are possible:
1.angle error
2.ratio error
3.secondary gets open
4.secondary simply acts as a conductor showing no ratio

Answer / guest

CT have some capacity to current carring at some voltage
level but some time we give more voltage to his capacity
that time ct passes more current up its capacity.

Answer / j.kesavan

ct saturate means when ct is open cicuite on load ct making
more sound and flashed.

if we supply DC power to AC transformer then what its result?

15 Answers  

---

how to measure dc earth leakage current?

0 Answers  

---

what is percentage impedance of transformer? explain its significance

2 Answers   ABC, Bosch,

---

if voltage is not builed up in small generator what will be the reason?

7 Answers   century,

---

what's the requirement of Dy11d0 connection of 3 phase transformer?what's use of it?

0 Answers   Thermal Systems,

---

---

is that any software calculator to calculate the size of cable

0 Answers   JSW,

---

if a train is running on a speed of 40 K MPH and crosses a individual passing by him in 48 secs who is riding a horse with a speed of 25 K MPH. what is the length of the train?

2 Answers  

---

How do we measure earth fault current in Generator Transformer(20/420kv),Station Transformer(20/11 kv) and Unit Transformers(20/11kv) for our plant system, since these don't have any Neutral earth Fault relay connected to their Neutral Earth? But for Unit Service transformers(11/.433 Kv) we have an Earth Fault Relay connected to its neutral earth.Why is such so?

1 Answers   NTPC,

---

Isi standard of lux level required / to be maitained in different working place general & in textaile industry.

1 Answers  

---

Sir, why generating power plant operating at above 0.9 lag? detail explaination?

1 Answers   Kirloskar, L&T,

---

What is the BS(British Standard)code for 11kv motor

1 Answers  

---

in my working site. momentary jerck in electrical supply ocurred frequently which cause of multiple losses in our electrical equipements. how can we protect our electrical machines and equipements in this situation.

1 Answers  

---