UNITOL 1000 Z.V3 3BHE014557R0003 | ABB Brushless Excitation System

ABB UNITOL 1000 Z.V3 3BHE014557R0003 Brushless Excitation System

· Input voltage: Usually requires a 24V DC DC power input to provide power support for the normal operation of the system.

· Stator voltage input: Connected to the stator voltage signal of a synchronous generator, the acceptable voltage range is generally between several hundred volts and 

several thousand volts, depending on the voltage level of the matched generator. It usually has multiple ranges to choose from to adapt to generators of different voltage 

levels.

· It can receive stator current signals from current transformers, with an input range generally ranging from tens of amperes to thousands of amperes. It also has different 

ranges to adapt to generators of different capacities, and the input signal is usually an AC current signal of 0-5A or 0-1A.

· The input interface includes signals such as rotor voltage, rotor current, generator speed, power factor, etc., to achieve comprehensive monitoring and precise control of 

the generator's operating status. The input range and accuracy of these signals depend on the requirements of specific measurement parameters.

· This interface is used to output excitation current to the excitation winding of the generator to regulate the magnetic field strength of the generator, thereby controlling the 

output voltage and reactive power of the generator. The output current range usually depends on the capacity of the controlled generator, ranging from tens of amperes to 

thousands of amperes, and the output signal is an adjustable DC current.

· Trigger pulse output: In some systems that use power electronic devices such as thyristors or IGBTs as excitation power units, there will be trigger pulse output interfaces 

used to send trigger signals to these power devices to control the on/off and magnitude of excitation current. The frequency, width, and amplitude parameters of the trigger 

pulse can be adjusted according to actual control requirements.

· Alarm and protection output: When the system detects a fault or abnormal situation, it will send signals to the outside through the alarm and protection output interface, 

such as closing the contacts of the alarm relay, outputting high-level or low-level signals, etc., to trigger external alarm devices or protection actions, such as cutting off the 

excitation power supply, stopping the machine, etc.