Which feature is typically associated with SSVT station service voltage transformers?

The correct answer highlights the unique functionality of SSVT (Station Service Voltage Transformers) in providing both voltage measurements and station service power. SSVTs are specifically designed to fulfill dual roles: they measure the voltage in a system while simultaneously supplying power for auxiliary services within the station. This dual capability is essential for the reliable operation of equipment and monitoring systems in high voltage environments.

The other options do not accurately reflect the characteristics of SSVTs. For instance, lower capacity is not a defining feature, as SSVTs can be designed with adequate capacity to meet station demands. Additionally, SSVTs are not limited solely to high voltage systems; they can operate effectively in various voltage levels while still serving their dual-purpose function. Finally, the idea that SSVTs cannot connect to relay systems is incorrect; in fact, they often interface with relays to ensure effective monitoring and control of electrical systems.