Fact Sheet

GE
Measurement & Control
The EX2100e 35A and 120A Automatic Voltage Regulators (AVR)
are part of the growing family of generator controls for gas,
steam, and hydro turbine-generators. They are built on GE’s 50
years of excitation experience with over 6,000 excitation systems
installed in 70 countries. These include new units and retrofits,
installed on a variety of generators from various manufacturers.
Building upon decades of proven experience, the EX2100e
incorporates the enhanced technology found in the Mark* VIe
control platform, making it a highly reliable and flexible solution.
The EX2100e 35A and 120A AVRs support several excitation
system applications, including brushless and rotating DC exciters,
as well as SCT/PPT regulator modernizations.
Architecture
The heart of the EX2100e AVR is GE's patented UCSB controller.
The UCSB controller incorporates modern system-on-chip
(SOC) architecture. The controller uses secure Ethernet based
communications to provide data to operator workstations
(HMIs) or to other GE Mark VIe controllers. Other communication
protocols such as Modbus (Serial or TCP/IP) can be used to
communicate with non-GE DCS systems.
The 35A and 120A power converters utilize a DC link and
insulated gate bipolar transistors (IGBTs) to modulate the AVR
output for precise generator control from a wide variety of
input sources. These sources include a single- or three-phase
permanent magnet generator (PMG), a single- or three-phase AC
source with power potential transformer or a 125 V DC or 250
V DC battery. The EX2100e AVR supports redundant AC and DC
power input to maximize system reliability.
The EX2100e AVRs are available in simplex or fully redundant
dual configurations to provide cost-effective solutions to
meet the needs of any application. GE’s advance dual control
technology combines redundant controllers, power supplies, fans
and power converters with a sophisticated virtual system model
to provide unequalled selectivity and fault tolerance from a dual
system (patent pending).
Features and Benefits
Advanced Controls: Provides industry-leading control, limiter, and
protective functions to maximize generator performance and
improve protection for a variety of applications.
Scalable: Two available power converters (35A and 120A DC
max) allow the EX2100e AVR hardware to be optimized for most
applications and budgets.
Flexible Packaging: Systems can be specified as a freestanding
800 mm x 800 mm (31 ½” x 31 ½”) IP20 /NEMA 1 (optional IP54)
panel configuration, as parts kits for custom installations or
retrofits where space is a premium, saving time and money.
EX2100e Generator Controls
35A and 120A Automatic Voltage Regulators
fact sheet
35A AVR 120A AVR