GE 151X1235DB15SA03 Electrical Control Board Card

Excitation control unit system 151X1235DB15SA03
151X1235DB15SA03 EX2100e excitation control regulator system is GE’s latest advanced control system for steam,
gas or hydroelectric generators, suitable for new units and modified units.
Control hardware and software design are closely coordinated with
GE’s system and control engineering to ensure a true system solution.
Integration between the excitation control system, turbine control system,
static start control system, integrated control system (ICS) and human machine interface (HMI) is seamless.
For stand-alone retrofit applications, integration with the customer’s distributed control system (DCS) is supported via serial or Modbus® Ethernet.
This document is specifically for the application of the 35 A and 120 A (nominal) series EX2100e control regulator systems.

Control Hardware
The 151X1235DB15SA03 EX2100e regulator system is available in multiple configurations to
provide control flexibility for thyristor and regulator systems.
For small regulator systems, two pulse width modulation (PWM) power converter modules
use insulated gate bipolar transistors (IGBTs) to provide up to 35 A or 120 A nominal output.
These systems can support the following applications:
• Saturated current transformer/power voltage transformer (SCT/PPT) regulators
• Brushless exciter regulators
• Direct current (dc) rotary exciter regulators
In SCT/PPT regulator and dc rotary exciter regulator applications,
the EX2100e regulator system can reduce the effects of exciter time constants.
It combines direct measurement of the generator excitation voltage and excitation current to improve response to system transients.
The architecture is a single control with a single power control module (PCM) or dual control with dual PCMs,
and includes a customer interface subsystem, optional diagnostic local operator interface (touch screen),
optional control operator interface (COI) remote touch screen interface, control power input module, and PCM.
The PCM consists of a bridge interface subsystem, power bridge, optional AC and DC filtering networks,
and AC (ac) and/or DC isolation devices. To expand input and output (I/O) capabilities, VersaMax® or Mark* VIe Control IONet I/O modules can be added.