ABB SCYC55830 SN1170020EL Excitation Thyristor Power Module for Unitrol Excitation System
ABB SCYC55830 SN1170020EL Excitation Thyristor Power Module for Unitrol Excitation System - Image 2
ABB SCYC55830 SN1170020EL Excitation Thyristor Power Module for Unitrol Excitation System - Image 3
ABB SCYC55830 SN1170020EL Excitation Thyristor Power Module for Unitrol Excitation System - Image 4

ABB SCYC55830 SN1170020EL Excitation Thyristor Power Module for Unitrol Excitation System

  1. SCYC55820 (Alternative thyristor power stack variant for Unitrol)
  2. PPD113B01‑10‑150000 (AC800PEC excitation controller)
  3. 3BHE023784R1023 (Order code for PPD113B01‑10‑150000)
  4. UNS 2880A (Unitrol excitation interface module)
  5. UF D128 (AC800PEC digital I/O module)
  6. SCYD558xx series (Unitrol power assemblies)
  7. Unitrol 6000 complete excitation cabinet
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Description

ABB SCYC55830 SN1170020EL Excitation Thyristor Power Module for Unitrol Excitation System

 

Product Details

SCYC55830 SN1170020EL is high‑power thyristor power assembly designed for ABB Unitrol series generator static excitation systems. Origin: Switzerland. Lifecycle status: EOL discontinued, OEM new production terminated; market supply includes NOS surplus and fully‑tested refurbished spare‑parts.

‑ Device type: Phase‑controlled thyristor bridge power module, complete assembled power stack with heatsink, pulse transformer and snubber circuit ‑ Part marking: SCYC55830 main part number; SN1170020EL serial / variant suffix for Unitrol application ‑ Application platform: Unitrol 5000 / Unitrol 6000 generator excitation cabinet ‑ Function: Controlled rectification, convert AC input power to DC field current for generator rotor excitation winding ‑ Cooling: Forced air cooling, matched cabinet fan system; temperature monitoring via thermal sensor ‑ Built‑in components: Power thyristors, gate pulse transformers, RC snubber circuits, over‑voltage protection varistors, temperature sensor ‑ Interface: High‑power AC/DC power terminals; low‑voltage gate trigger signal interface from AC800PEC controller; temperature feedback signal ‑ Operating ambient: ‑10℃ ~ +70℃, humidity 5‑95 % non‑condensing, IP20 cabinet‑only installation ‑ Weight: approx 8.5 kg

 

Applications

‑ Thermal‑power / hydro‑power plant synchronous generator Unitrol static excitation system ‑ Power‑unit phase‑controlled rectification providing DC excitation current for generator rotor ‑ Large industrial synchronous motor excitation equipment ‑ Retrofit & spare‑part replacement for existing ABB Unitrol 5000 /6000 excitation cabinets ‑ Spare inventory for power‑plant electrical maintenance department

SCYC55830

Related Series Models (6+)

  1. SCYC55820 (Alternative thyristor power stack variant for Unitrol)
  2. PPD113B01‑10‑150000 (AC800PEC excitation controller)
  3. 3BHE023784R1023 (Order code for PPD113B01‑10‑150000)
  4. UNS 2880A (Unitrol excitation interface module)
  5. UF D128 (AC800PEC digital I/O module)
  6. SCYD558xx series (Unitrol power assemblies)
  7. Unitrol 6000 complete excitation cabinet

 

Key Features

  1. Complete assembled thyristor rectifier power stack dedicated for ABB Unitrol 5000/6000 generator static‑excitation system.
  2. Integrated thyristors, gate pulse transformers, RC snubber and over‑voltage varistor protection for phase‑controlled rectification.
  3. Forced‑air cooled design with built‑in temperature sensor for over‑heat monitoring and protection interlock.
  4. Receives optical/electrical gate trigger pulses from AC800PEC controller to regulate DC excitation output current.
  5. Heavy‑industrial power‑grade construction, designed for continuous 24‑hour generator‑set operation.
  6. Thermal‑monitor signal feedback to excitation control system for over‑temperature alarm and trip logic.
  7. High‑power AC‑input and DC‑output terminal blocks for generator‑field circuit connection.
  8. Manufactured in Switzerland; EOL obsolete, only NOS or fully‑tested refurbished spare‑parts available.

 

Main Functions

  1. Perform phase‑controlled AC‑to‑DC rectification to supply adjustable DC excitation current for synchronous generator rotor winding.
  2. Receive trigger pulse signals from AC800PEC controller, adjust firing angle to regulate excitation output voltage and current.
  3. Built‑in snubber circuits and varistors suppress transient over‑voltage to protect thyristor devices.
  4. On‑board temperature sensor monitors heatsink temperature, feed over‑heat status back to excitation controller for alarm/trip interlock.
  5. Convert transformer‑supplied AC power into controlled DC field power under excitation‑system closed‑loop regulation.
  6. Cooperate with cooling‑fan assembly to maintain safe operating temperature for high‑power thyristor devices.
  7. Work together with control unit to complete full‑set generator static‑excitation regulation.
  8. Serve as high‑power rectification power stack inside ABB Unitrol generator‑excitation cabinet.

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