Fault indicators

Smart Insulator Glass SI-G

Operating voltageFrom 60 kV to 110 kV
Protection typeAgainst direct & indirect lightning
Installation3 products per pole

Insulator and Line Lightning Protection Device in one product!

The SI-G is intended for ensuring protection of:

• Recloser and Load Break Switches

• Medium- and Low Voltage Transformer

• Underground Cables

• Conductor and Insulator against direct and indirect lightning strikes, installed on Sectionand Termination Poles.

The SI-G installed in association with Metal-Oxide-Arrester provides the best possible protection for high and medium voltage substations.

The brand new SmartInsulator is a hybrid product combining properties of a LLPD and an insulator simultaneously. It is the first product in Streamer’s range meant for subtransmission and transmission lines. Each piece is based on a conventional cap-and-pin glass insulator with the unique EasyQuench technology. Depending on the rated voltage of an overhead line, different amount of pieces can be utilized.

Technical characteristics

Medium    29

Performance specifications

Nominal voltage, kV 66
Maximum continuous power frequency operating voltage / Rated voltage, kV 72.5
Quantity of SmartInsulators in a string, pcs 5
Minimum mechanical breaking load, kN 120
Radio interference level at 1,1 of maximum operating phase-to-ground voltage, at the most, Db 55
Power frequency withstand voltage, kV
Dry 165
Wet 140
Overall height, mm 730
Creepage distance, mm 1825 (365x5)
External spark gaps, mm 305
Voltage-time curve of MCIA string lies below voltage-time curve of insulators' string in all range of prestrike times (from tens of μs to tenths of μs), no less than, % 20
Prospective short-circuit current (rms), kA 5
Lighting discharge capability, C 2.4
High current impulse, kA 100
Weight, kg 33.5 (6.7x5)

Test Certificates

Type of Test
Power frequency withstand test STREAMER
Follow Current interrupting test STRI, STREAMER
Environmental test STREAMER
Vibration test STREAMER
Ice test STRI
Functioning Test STREAMER