ABB 800 Series Turbine Modules
ABB 800 Series Turbine Modules
DESCRIPTION
The Auto Synchronizer AS800 adds automatic circuit-breaker closure capability to the System 800xA or to any other controller with Profibus interface. It can be used for generator to grid synchronization, as well as for peer to peer bus synchronization in switchyard applications. The AS800 module supports high and low range (0-130 VAC and 0-50 VAC) bus input voltages operating at either 50 or 60 Hz. The AS800 functionality includes automatic matching of voltage, frequency and phase, as well as automatic generator breaker closure.
Additional Features
Built-in Profibus Interface
Non-proprietary communication for true open architecture integration
Master and Line Redundancy
Sync Verification
The AS800 has a built-in independent synchronization circuit which serves as a check to the primary circuit. When voltage, frequency, and phase match occur, the AS800 will only close the breaker when the primary and secondary synchronization circuits are in agreement.
Dead Bus Capability
The AS800 has the intelligence to recognize dead bus situations, and upon external enabling (Dead Bus Enable input), will perform breaker closure.
Stand-Alone Mode
The AS800 can operate in harmony with a master controller (such as AC800M) via Profibus communication. It can also operate independently with hard-wired digital inputs and serial communication via an RS-232 physical interface.
Inputs
The AS800 field inputs include two AC voltage signals (buses to be synchronized) and eight digital inputs for process feedbacks and Stand-Alone Mode interface.
2 AC Inputs (120VAC 50/60Hz)
Line / Generator
Bus A / Bus B (switchyard applications)
2 Digital Inputs (24/48/125VDC, 120VAC)
Generator Breaker
Dead Bus Enable
6 Digital Inputs (24/48VDC)
Breaker Status Feedback
Independent Relay Feedback
4 Stand Alone Mode Permissives
Outputs
There are six outputs used to drive external relays (ROM810) for voltage regulator control, frequency control, and generator breaker control.The two breaker control relays, Main and Indicheck, can be connected in series.
6 Relay Outputs
Generator Breaker Main
Generator Breaker Indicheck
Volts Raise
Voles Lower
Speed Raise
Speed Lower
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