Isolated phase bus ducts series TEN (hereinafter referred to as “bus ducts”) used for the electric energy transmission in three-phase alternating current nets with the frequency of 50 or 60 Hz; voltage is up to 35 kV across rated current up to 31500 A. Such nets can be used in the construction, modernization and technology upgrade of all types of power stations, substations and also overhead electric power supply lines which correspond to type II under GOST 15150.
Bus ducts are the rigid metal structures in which in accordance with the design documents the phases are positioned in one coating.
Specific requirements with regards to the bus ducts configuration, availability and location of the devices built into the bus ducts, and also additional technical requirements are to be stated in the particular item assignment for the engineering company of a Customer. It shall also be agreed upon with the bus duct manufacturer via checklist.
Climatic version is N (for macroclimatic area with moderate climate), NF (for macroclimatic area with moderate and frigid climate), T (for macroclimatic area with both dry and humid tropical climate). Location category is 1 in accordance with GOST 15150.
Bus duct type designation:
- TEN – EX – X – XX1
- Х - Climatic version and location category in accordance with GOST 15150
- Х - Peak withstand current, кА
- Х - Rated current, А
- Х - Rated voltage, кВ
- Е - Natural cooling
- N - Continuous
- E - Shielded
- T - Bus duct
The following is the identification example for isolated phase bus duct with natural cooling. Rated voltage is 20 kV. Rated current is 1000 A. Able to withstand surge current of 300 kA. Climatic version is N. Location category is 1 in accordance with GOST 15150 for inland and export delivery:
Bus duct TEN - E 20 – 10000 – 300 N1 TU U 27.3-05755559-001-2015