Power Industry policies of the Russian Federation have given a top priority for the development of Smart Grid concept. In particular, research and design of non-conventional instrument current and voltage transformers for networks 35 to 110 kV is the task of major importance.
Primary current and voltage sensors of optical type are acknowledged as having the best market potential.
Components: Optical voltage sensor and optoelectronic unit with a standard signal output or Merging Unit on its end (for Digital Substation applications).
Project status: investment offer.
Electro-optical effect of electro-gyration
For DSS applications
IEC 61850-9-2LE output
Reference equipment from Mars-Energo
Unique design feature:
Higher measurement accuracy (in comparison with the existing electro-gyration sensors) is achieved owing to Faraday effect compensation, namely:
Additional polarization rotation angle caused by the Faraday effect (induced by magnetic fields of large currents passing through the circuits) is compensated in the optical path designed so that “electro-gyration” polarization rotation angles of oppositely directed light beams are forced to be of the same sign, and “Faraday” polarization rotation angles become opposite in sign.
|Voltage ratings||10; 20; 35 kV to 110 kV AC|
|Accuracy class||0.2S; 0.5S|
|Frequency range||1 ... 10 000 Hz|
4; 100; 100v3 V
according to 61850-9-2LE
|Fiber guide length between the optical sensor and optoelectronic unit||Up to 200 m|
|Dimensions and weight
130 х 290 mm, 5 kg, or less
134 х 215 х 450 mm, 3 kg, or less
|Power supply (Optoelectronic unit)||220 V; 50 Hz|