PRISMIC® A3100
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TRUST. WELL EARNED. PRISMIC® A3100 Excitation Controller The A3100 includes two fully featured independent controllers and two independent power circuits within a single 6U 19 inch enclosure, all available as removable cards (single channel option available). Introduction The BRUSH PRISMIC® A3100 excitation controller or automatic voltage regulator (AVR) incorporates all the features required for control of a brushless generator. Each controller channel acts as a hot standby for the other and each channel is independently controlled with automatic tracking included to enable smooth transfer from one controller to the other. The non-operating channel control and power cards can be extracted without powering down the AVR or excitation so maintaining power generation whilst exchanging the cards. With most connectors completely compatible with earlier BRUSH controllers the A3100 is an easy replacement of previous BRUSH AVRs such as the MAVR, A30 and A30-M. Generators equipped with previous generation analogue MAVR units may be easily upgraded to use the A3100 with the addition of a simple upgrade loom kit. Key Features • High integrity dual redundant excitation system in a single 19 inch enclosure • Hot swappable control and power channel • Built in power system stabiliser (optional feature) • Automatic synchroniser (optional) • SCADA/DCS communications using Ethernet Modbus TCP/IP or Ethernet Global Data (EGD) or RS232/RS485 Modbus RTU protocol • Conforms to CE directives • cCSAus approved • Compatible connections with earlier BRUSH products for easy upgrades - an ideal upgrade for the MAVR, MicroAVR or A30 • Automatic tracking between channels in all modes • Negative forcing of exciter field voltage • Including PC Human Machine Interface (HMI) software for advanced maintenance diagnostics and downloading of data • Digital (discrete) outputs for remote status indication • Analog input signal for special applications • Modes of operation include generator terminal voltage control, power factor control, var control and offload vars • Monitoring of rotating rectifier health and diode failure indication • The following limiters are included: - Over excitation limiter - Under excitation limiter - Over flux limiter - Fast acting field current limiter - Stator current limiter • Automatic switching to standby initiated by the following conditions: - Over voltage monitor triggered - Under voltage monitor triggered - Over excitation monitor triggered - Under excitation monitor triggered - Over flux monitor triggered - Voltage sensing error • Speed detector included eliminating the need for separate speed switch unit • Rotor ground (earth) fault detector input included eliminating the need for separate unit (R10 receiver) • Auxiliary power supply input allows easy setting of unit without PMG supply present • Soft start for controlled application o

Specification Max continuous output current 20A Max 10 second output current 30A Nominal sensing voltage 100V to 120V selectable in 0.1V steps Voltage sensing phases 3 phase or single phase Nominal generator frequency 50Hz or 60Hz Underexcitation Limiter Excitation supply voltage single phase 110V to 330V Underexcitation Monitor Overexcitation Limiter Overexcitation Monitor Limiter and Monitor Settings Current transformer input nominal 5A or 1A Current transformer input burden 0.3VA Load taken by sensing inputs 0.3VA Maximum field voltage for forcing 75% of available excitation supply...