Drive Solutions for the Global Oil and Gas Industry ... - GE Energy

We Engineer the Medium Voltage Power System
TMEIC GE application engineers design the power system from the medium voltage switchgear to the adjustable speed drive
and motor. The critical engineering process for a successful installation is illustrated in the chart (top of next page) and
detailed in this Project Engineering section. Icons indicate where the various teams of engineers in the factory and field
service are involved in the project.
A typical MV power system is shown below. We size and select all the equipment for the optimal drive solution.
Medium Voltage Power S
ystem
Transmission Voltages
Distribution Voltages
>
Substation
Transformer
Breaker
Instrumentation
Drive Isolation
Transformer
MV s
witchgea
r is selected for the
application c
onsidering:
- The type, such as vacuum or S
F6
- The size for the current and v
oltage
- The CTs, PTs, and protective r
elays
to operate the b
reaker
- The enclosure for outdoor or i
ndoor
- The environment such a
s
temperature and h
umidity
Instrumentation for e
quipment
metering, monitoring, p
rotection
and control is selected, i
ncluding:
- Amp transducer and a
mmeter
- Watt and Watt-hour t
ransducers
- Phase CTs and phase overcurrent r
elay
- Ground sensor CT and r
elay
- Power quality m
onitor
Drive isolation, input and output,
transformers are selected for the
application c
onsidering:
- The type, such as dry or liquid fi
lled
- Size for the kVA and v
oltage
- Cooling if r
equired
- The enclosure for outdoor or i
ndoor
- The environment such a
s
temperature and h
umidity
- Special drive r
equirements
Page 14 of 32
© 2009 TMEIC GE Automation Systems. All Rights Reserved.
Revised: 5-22-09