The STS 7041 is a relay which verifies the synchronism between two sources. It is generally used to allow a closing signal to be trasmitted to a breaker which ties together two independent sources.
The relay is supplied in a modular plug-in case type R3, which may be mounted either as a separate relay, projecting or flush mounting, or as an element in a standard 19" rack cradle.
The STS 7041 is based on the analysis of signals by analogue and numerical systems granting it high precision and stability.

PROTECTION   FUNCTIONS

• Synchro Check [25]

MAIN   FEATURES

• Settings by frontal switches / potentiometers
• Setting ranges by switches:
  – voltage difference: ±3, 5, 10, 20, 30% Un
  – frequency difference: ±0.16, 0.08, 0.04, 0.02, 0.01% Hz
  – phase-angle difference: ±10, 20, 40 °
• LED indication for each major function, with one LED flashing at slip frequency
• Operating at 50 or 60 Hz
• Auxiliary output relay with two high-power contacts
• Security achieved by internal redundancy