H.T. & L.T. Switchgear :
Switchgear
classification, Switchgear installation, Switchgear equipment, Metal clad
Switchgear and Controlgear.
Fuse :
What
is Prospective Current?, Cut-off value, Fuse Characteristics, Fuse to Fuse
Co-ordination, Application of fuse with Contactor.
Circuit
Breaker :
Type
of Breaker, Comparison of Switchgear (Fuse, MCB, MCCB, ACB), Application of
circuit breakers,
Tripping Time and Closing Time, Series trip, Shunt trip, Trip Circuit
Supervision, Switchgear rating, Fault Level evaluation / Breaker
Rating.
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Legends
and Symbols.
-
NEMA
device Number.
-
How
to read electrical drawings.
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Direct
On-Line starter.
-
Star-Delta
starter.
-
Forward
Reverse Starter.
-
Circuit
breaker closing, Tripping and Anti-pumping circuit.
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Different
between Relay and Release.
-
Comparison
of Release.
-
Comparison
of Contractor and Circuit Breaker.
-
Contractor
and Switch utilization category.
-
Degrees
of enclosure protection for switchgear.
-
Layout
of Switchgear statutory requirements.
Equipment
Protection :
L.V. Motor
Protection, Transformer
Protection, Motor Protection, Feeder Protection (Pilot Wire).
Switchgear
Testing :
Switchgear
and Switchgear Assembly, Electrical tests on the Switchgear, Test values, Low
Voltage Circuit Breakers (Insulated Case / Moulded Case), Electrical Tests
conducted on Low Voltage Circuit Breaker, Medium Voltage Circuit Breaker,
Electrical tests to be carried out on Medium Voltage Circuit Breaker, Results
of Electrical Tests, Instrument Transformers, Protection Relays.
C.T.
Testing :
IR
value measurement, Polarity checks, Ratio check, C.T. Excitation (Saturation)
Characteristics checks, Secondary winding + Lead Resistance measurement, C.T.
secondary circuit injection check.
P.T.
Testing :
IR
value measurement, General checks during P.T. Testing, Polarity checks, Ratio
check, Secondary injection check, Fuse failure scheme checks, P.T. combined
primary/secondary injection checks.
