The SPAU 341 C is a voltage regulator from ABB with automatic or manual voltage control for voltage regulation of power transformers with on-load tap-changer in distribution substations. Here are some of the key features and functions of the SPAU 341 C voltage regulator:

Automatic or manual voltage control: The SPAU 341 C can automatically or manually control the voltage of the transformer to maintain a stable secondary voltage.

Three-phase overcurrent and undervoltage protection: with three-phase overcurrent blocking and undervoltage blocking functions to protect the transformer.

Line loss compensation: Can compensate the voltage drop of the line or network, suitable for single transformer applications and parallel transformer applications.

Parallel operation: The SPAU 341 C can operate the transformer in parallel through the principle of master-slave, negative reactance or minimization of circulating current.

Tap position measurement: With tap position measurement function, you can more accurately control the tap position of the transformer.

Digital display: with a digital display, display the set value, measurement value, indication and other information.

Serial interface: Has serial interface for bus connection module and fiber optic substation bus.

Self-monitoring function: Provides continuous self-monitoring of hardware and software to improve system reliability and availability.

Powerful software support: Provides powerful software support for the parameter setting and monitoring of the regulator.

Technical data: The SPAU 341 C‘s rated voltage Un can be selected from 100V, 110V or 120V, suitable for 50Hz or 60Hz power grids, with continuous voltage tolerance and rated load.

Input and output terminals: Having terminals for current input, voltage input, control input and output, and ports for serial communication.

Maintenance and repair: Used under specified technical conditions, the SPAU 341 C is virtually maintenance-free. If there is a significant difference between the operating value and the specified value, a proper overhaul should be carried out.

Spare parts and accessories: The automatic voltage regulator SPCU 1D50, manual voltage regulator SPCN 1D56, and power module are provided.

Mounting and size: The SPAU 341 C is designed for embedded mounting, which reduces mounting depth by raising the frame