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.

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