ABB

Main Functions

1. Unidirectional phase‑angle power regulation: Triggered by gate pulse to turn on during positive half‑cycle only; realize continuous adjustment of output voltage and power for AC‑to‑DC conversion. Turn‑off is achieved by natural current zero‑crossing of power frequency grid, no forced turn‑off capability.More products: www.plcva.com
2. High‑voltage high‑current rectification: Convert AC input into adjustable DC output; sustain large load current with low on‑state power loss after gate triggering.
3. Superior surge‑current withstand: Capable of handling huge short‑time surge current; high dv/dt and di/dt immunity to avoid false triggering under heavy electromagnetic interference environment.
4. Series‑parallel capability: Optimized static and dynamic parameters support multiple devices connected in series for higher blocking voltage or parallel for larger current, to satisfy ultra‑high‑power system requirements.
5. Dual‑side cooling performance: Adopt patented free‑floating silicon press‑pack structure, support double‑sided heat dissipation, low thermal resistance, excellent power‑cycle resistance and anti‑thermal‑shock performance for long‑term stable operation.
6. Interdigitated amplifying gate design: Lower gate trigger requirement, improve turn‑on uniformity across the whole silicon chip, reduce local hot‑spot risk.

ABB 5STP28L4200 Unidirectional Phase‑Control Thyristor

Typical Applications

1. Static Var Compensator (SVC): Grid reactive‑power compensation, stabilize system voltage, suppress voltage flicker for metallurgical and mining sites.
2. High‑power industrial rectifier systems: Electrolysis power supply for aluminum smelting, chlor‑alkali chemical electrolysis, DC arc furnaces and induction heating equipment.
3. Line‑commutated HVDC converter valves: High‑voltage direct‑current power transmission and energy delivery projects.
4. Heavy‑duty DC motor drives: Speed control for rolling mills, mine hoists and large industrial traction equipment.
5. Large‑motor soft‑start systems: Limit starting current for high‑voltage heavy‑power motors to reduce grid impact.
6. Synchronous generator excitation units: Provide adjustable DC excitation current for large‑capacity generators in power plants.
7. Renewable energy grid‑connected power conversion: High‑power power conditioning for energy conversion and industrial power supply retrofit projects.