cdg61 relay internal wiring diagram

[jaseela123d]

A non-directional heavily damped
induction disc relay which has an
adjustable inverse time/current
characteristic with a definite
minimum time. The relay has a high
torque movement combined with
low burden and low overshoot. The
relay disc is so shaped that as it
rotates the driving torque increases
and offsets the changing restraining
torque of the control spring. This
feature combined with the high
torque of the relay ensures good
contact pressure even at currents
near pick-up. Damping of the disc
movement is by a removable high
retentivity permanent magnet.
The unique method of winding
the operating coil ensures that the
time/current characteristics are
identical on each of the seven
current taps. Selection of the
required current setting is by
means of a plug setting bridge
which has a single insulated plug.
The maximum current tap is
automatically connected when the
plug is withdrawn from the
bridge, allowing the setting to be
changed under load without risk
of open circuiting the current
transformers.
The IDMT relay has an auxiliary
unit which is powered by a
secondary winding on the
electromagnet through a rectifier
and as such a separate auxiliary
supply is not required. The disc unit
operates and closes its contacts, the
auxiliary element connected across
the secondary winding on the
electromagnet operates, one
normally open contact of the
auxiliary element reinforces the
disc contact. Two other contacts of
the auxiliary element are brought
out to the terminals of the relay