Medium
Voltage Circuit Breakers & Contactors
In an electric power system, switchgear is the
combination of electrical disconnect switches, fuses or circuit breakers used
to control, protect and isolate electrical equipment. Switchgear is used both
to de-energize equipment to allow work to be done and to clear faults
downstream. This type of equipment is important because it is directly linked
to the reliability of the electricity supply.
Typically switchgear in substations is located on
both the high voltage and the low voltage side of large power transformers. The
switchgear on the low voltage side of the transformers may be located in a
building, with medium-voltage circuit breakers for distribution circuits, along
with metering, control, and protection equipment. For industrial applications,
a transformer and switchgear line-up may be combined in one housing, called a
unitized substation or USS.
This course is designed for technicians and
engineers who are responsible for maintenance of medium voltage air / vacuum
circuit breakers and contactors (Magne-Blast, Power/VAC and Limit amp
equipment). Two-thirds of the class is dedicated to hands-on laboratory work
Outline :
1.
Magne-Blast circuit breakers
-
Drawings
-
Switchgear protective relays
-
Ml-13 operating mechanism
-
Adjustments and maintenance
2.
Power/VAC circuit breakers
-
Drawings
-
Ml-17 operating mechanism
-
Ml-18 operating mechanism
-
Adjustments and maintenance
3.
Limit amp motor controllers
-
Drawings
-
Limit amp air-break contactors
-
Limit amp vacuum contactors
-
Adjustments and maintenance
Peserta :
All
personnel involved Medium Voltage
Circuit operation and optimization: operators, supervisors and
engineers
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