ABB 2RDA014225A0006 1VC119000148K02 Excitation Control Module

Overview

The ABB 2RDA014225A0006 marked with trace code 1VC119000148K02 is a plug‑in excitation control board of the ABB RDA family for UNITROL synchronous generator excitation systems. It performs automatic voltage regulation, manual field current control, reactive power adjustment and excitation supervision protection. It samples generator terminal voltage and field feedback signals, calculates firing pulses and drives thyristor rectifier bridges. It is widely used in thermal, hydro and waste heat power plant excitation cabinets as spare replacement hardware.

Features

The ABB 2RDA014225A0006 is the core regulating board for ABB UNITROL excitation systems.2RDA014225A0006 supports AVR automatic voltage mode and manual field current mode. Built-in supervision for overexcitation, underexcitation, loss of excitation and field circuit faults. Analog and digital signal interfaces for voltage/current feedback and thyristor trigger output. Backplane plug-in design, easy replacement in compatible cabinet racks. Designed for heavy EMC environment in power station switchgear. Interworks with other RDA series signal and interface boards inside the UNITROL cabinet. The suffix trace code 1VC119000148K02 indicates the production batch and firmware revision.

Specs

Device Type: Excitation Control Board Model: ABB 2RDA014225A0006 Trace code: 1VC119000148K02 Brand: ABB Series: RDA excitation control series Compatible system: UNITROL generator excitation system Mounting: Rack backplane plug-in Function: AVR regulation, field control, excitation fault monitoring

Principle

The ABB 2RDA014225A0006 continuously measures generator terminal voltage and field current. It compares measured values against reference setpoints, computes the required firing angle and sends trigger signals to the thyristor power bridge. It stabilizes generator voltage and reactive power; it activates protection outputs when excitation operating limits are exceeded.

Applications

The ABB 2RDA014225A0006 is deployed in power station excitation cabinets for synchronous generators. The ABB 2RDA014225A0006 is stocked as spare replacement for legacy ABB UNITROL excitation regulation systems.