PRISMIC A50 — excitation systems for synchronous generators (static, brushless, AC/DC exciter), 20–8000 A
PRISMIC A50 is an excitation system for synchronous generators, developed on the basis of many years of experience in manufacturing generators and excitation systems for machines of up to 1000 MW.
- Types
- A50-S static (IEEE 421.5 ST4C); A50-B brushless (AC7C); A50-A with AC exciter; A50-D with DC exciter (modernization)
- Excitation current
- from <20 A to >7000 A (B6C bridges up to 8000 A / 800 V; IGBT 10 A / 250 V)
- Voltage regulation accuracy
- ±0.25 %
- Redundancy
- one- or two-channel, duplicated converters, bumpless transfer
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
PRISMIC A50 is an excitation system for synchronous generators, developed on the basis of many years of experience in manufacturing generators and excitation systems for machines of up to 1000 MW. The PRISMIC A50 digital regulator is certified to cCSAus and complies with CE requirements. Systems are supplied turnkey, from assistance in formulating technical requirements to manufacture, factory tests (including tests with the real system on a real-time power system simulator for stability tuning) and commissioning. Four types are produced: A50-S, static excitation with a powerful controlled bridge that feeds current to the rotor winding through slip rings, for applications requiring high speed of response (model IEEE 421.5 ST4C); A50-B, brushless excitation, where an AC exciter feeds a rotating rectifier (model AC7C); A50-A, excitation with an AC exciter on the generator shaft and an A50 bridge; A50-D, with a DC exciter, usually for modernization. The excitation current range is from less than 20 A to more than 7000 A; the converter line includes IGBT 10 A / 250 V and thyristor B6C bridges from 20 A / 400 V to 8000 A / 800 V. Functions: voltage regulation with an accuracy of ±0.25 %, power factor or reactive power regulation when operating in the grid, reactive current compensation, under-excitation limiters, stator current, rotor current, U/f and voltage limiters, a fast field current limiter, a power system stabilizer PSS (IEEE PSS2C or PSS3C), a built-in synchronizer and manual mode. One- or two-channel redundancy with bumpless transfer, field suppression, overvoltage protection (crowbar), an excitation supply transformer, field circuit breakers, Modbus, Profibus DP, Modbus/TCP and Ethernet Global Data communication, and remote monitoring are provided; the configuration and diagnostic software runs on a Windows PC. Applications: turbo and hydro generators of power plants, industrial CHP plants, and excitation system modernization.
Technical specifications
| Types | A50-S static (IEEE 421.5 ST4C); A50-B brushless (AC7C); A50-A with AC exciter; A50-D with DC exciter (modernization) |
|---|---|
| Excitation current | from <20 A to >7000 A (B6C bridges up to 8000 A / 800 V; IGBT 10 A / 250 V) |
| Voltage regulation accuracy | ±0.25 % |
| Redundancy | one- or two-channel, duplicated converters, bumpless transfer |
| Functions | under- and overexcitation limiters, stator and rotor current limiters, U/f; PSS (IEEE PSS2C/PSS3C); synchronizer; field suppression, crowbar |
| Communication | Modbus, Profibus DP, Modbus/TCP, Ethernet Global Data |
| Experience | generators up to 1000 MW |
| Certificates | cCSAus, CE |
Request a price and lead time
PRISMIC A50 — excitation systems for synchronous generators (static, brushless, AC/DC exciter), 20–8000 A. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Similar equipment from other manufacturers
