GE EX2100 用户手册
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Glossary of Terms
GEH-6632 EX2100 User’s Guide
Modbus
A serial communication protocol developed by Modicon for use between PLCs and
other computers.
other computers.
multiple bridges
Several power producing bridges operate in parallel to produce a high field current.
These share the exciter current load to provide redundancy and increased reliability.
These share the exciter current load to provide redundancy and increased reliability.
NEMA
National Electrical Manufacturers Association; a U.S. standards organization.
non-volatile
Memory specially designed to store information even when the power is off, for
example Flash memory.
example Flash memory.
OLR
On-Line Repair, capability provided by redundant control elements.
over-excitation limiter (OEL)
OEL software limits the excitation current to prevent overfluxing the generator
power conversion module (PCM)
The PCM or Bridge consists of six three-phase rectifiers, with associated protection
and control devices, to generate the dc field current.
and control devices, to generate the dc field current.
power current transformer (PCT)
A PCT can be attached to the generator line to provide a portion of the three-phase
power for the exciter, part of a compound source.
power for the exciter, part of a compound source.
power distribution module (EPDM)
The PDM distributes 125 V dc to the power supplies for the controllers and I/O
termination boards.
termination boards.
power potential transformer (PPT)
A PPT is attached to the generator terminals to provide three-phase power for the
exciter; referred to as a potential source.
exciter; referred to as a potential source.
power system stabilizer (PSS)
PSS software produces a damping torque on the generator to reduce generator
oscillations.
oscillations.