MS 35/10(6) kV

Modular substations for a rated voltage of 35 kV are intended for receiving, converting and distributing electrical energy of an alternating three-phase current with a frequency of 50 Hz.
E-houses are used at electric grid facilities, in power supply systems of industrial enterprises, gas and oil-producing industries, at rural and urban facilities, and also in railway transport.

     MS distinguishing features

  • MS is a product of maximum operational readiness.
  • Ability to install various types and composition of equipment in accordance with the Customer’s requirements.
  • Possibility of increasing connections on a modular basis.
  • Convenience of assembling and operation.
  • Mobility and easiness of transportation of container storage units by road and rail.
  • Reducing the duration of commissioning works by reducing the scope of work required to install equipment at the facility.
  • Reducing the size of the land parcel and the construction works scope on the site arrangement for the substation installation by reducing the substation dimensions in a mobile modular version.
  • Ability of connection to cable as well as to overhead power lines.

MS operation conditions

  • MS climatic version and placement category — Y1, XL1 by GOST 15150-69;
  • ambient air temperature from -60° C to +40° C;
  • type II atmosphere – industrial, environment – non-explosive, free of dust in concentrations that reduce the product parameter
  • air relative humidity up to 80% at the temperature of 20ºС;
  • installation altitude above sea level is no more than 1000 m;
  • wind speed up to 36 m/s (wind pressure up to 80 daN) in the absence of atmospheric ice, wind speed up to 15 m/s (wind pressure up to 14 daN) with the atmospheric ice with its thickness of 20 mm;
  • seismic resistance is 8 points per MSK- 64.
MS of 35 kV composition includes:
  • 35 kV switchgear;
  • oil or cast insulated 35 kV power transformer;
  • cubicle switchboard 35 (20, 10, 6) kV;
  • auxiliary power transformer;
  • the operational power system with a compact storage battery and a recharging device;
  • relay protection and automatic equipment cabinet;
  • central alarms cabinet;
  • alternative current in-house cabinet;
  • telemetry equipment cabinet;
  • metering cabinet;
  • container storage unit;
  • jumper cables.

The configuration and composition of the equipment used in MS can be changed at the Customer’s request in accordance with the technical specification requirements.

Technical parameters and characteristics

Parameter name Parameter value
Rated voltage, kV
— high 35
— medium
— low 20, 10, 6
Supply transformer capacity, MVA Up to 40
Frequency of alternative electric current, Hz
Rated current of bus bars, А 630, 800, 1000, 1250, 1600, 2000, 2500, 3150
Rated voltage of auxiliary circuits, V
DC 220
AC 220, 380
Switchgear 110 kV parameters:
– rated thermal current(1 s), кА Up to 50
– electrodynamic withstand nominal current, кА Up to 128
– cutoff current of the fault interrupter switch, кА Up to 50