OREANDA-NEWS. MOESK (belonging to the Rosseti Group of Companies) demonstrated how high-voltage cable networks work during the period of high temperatures using two Moscow cable galleries, “Narvsky” and “Yurlovsky”, as an example. Within the framework of the press tour, specialists of Moscow Cable Networks and High Voltage Cable Networks, branches of the electric grid company, told journalists how a reliable electric power supply via high and medium voltage cable lines is ensured in Moscow.

Journalists took a tour of the cable galleries located in Northern and North-Eastern Administrative Districts of Moscow, learned about peculiarities of work of brigades of power engineering specialists in the galleries and appreciated the high level of safety and culture of operation of the electric grid facilities.

Two branches of JSC “MOESK”, Moscow Cable Networks and High Voltage Cable Networks, are responsible for transmission of electric power via cable lines. Konstantin Bnagov, Deputy Chief Operation Engineer of High Voltage Cable Networks, Ivan Karetin, Head of Cable Galleries Service of Moscow Cable Networks, and Roman Polonsky, Head of Cable Galleries Operation Department of High Voltage Cable Networks, replied to questions of journalists during the press tour.

According to specialists, underground engineering structures, including cable tunnels and cable galleries, are utility arteries of the city used to transmit electric power from main substations and supply electric power to transformer substations from which it is delivered to consumers.

“Narvsky” and “Yurlovsky” cable galleries are equipped with a water removal system, ventilation and security and fire alarm systems. The control station receives information about performance of the said systems and emergency situations via fiber-optic communication lines. Subdivisions of MOESK branches ensure elimination of the violations found and performance of scheduled maintenance and repair works 24 hours a day. Power engineering specialists ensure a reliable operation of cable lines of all voltage categories using innovative solutions.

Replying to questions of journalists, Ivan Karetin said that the length of cable lines of Moscow Cable Networks is about 62 thousand kilometers and there are over 15 000 transformer substations in the area of responsibility of the branch. 37 cable tunnels and galleries containing over 2 100 cable lines with the voltage ranging from 6 to 35 kV and total length of 780 km play an important role.

Konstantin Bnagov, in turn, said that High Voltage Cable Networks maintains the largest 110-220-500 kV cable network in Russia and ensures reliable electric power supply to consumers in and around Moscow. The area of responsibility of the branch includes 303 cable lines that are over 933 km long and over 832 cable structures. Over 150 main substations are interconnected with cable and overhead cable high voltage lines.

Today all electric grids in Moscow are laid under the ground. This makes it possible to free up territory of the city for residential construction, construction of facilities intended for social needs and infrastructural construction.

“Moreover, it improves reliability of the network because the number of outages significantly decreases compared to overhead transmission lines,” added Konstantin Bnagov.