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    1. Electrical installation works

During installation of electrical equipment, it is necessary to follow the requirements of GOST12.3.032-84 "Electrical installation works. General safety requirements".

Prior to allowing the Contractor's electrical installation personnel to access the existing electrical installations to perform work, this personnel shall be instructed on electrical safety at work by responsible person, who issues permission for work.

Persons engaged in electrical installation works, shall not perform any works related to operation of Employer's and/or Contractor's electrical facilities.

Pulling wires through broaching boxes, crates, pipes, blocks, in which live wires are placed, is not allowed.

Unwinding of cable drum is allowed only if the braking device is provided.

During adjustment of circuit-breakers and disconnectors, combined with driving mechanisms, certain measures shall be provided to warn on possible unforeseen closing or opening.

Fuses of control circuits of a unit being installed shall be removed for entire period of installation.

If it is necessary to supply operating current for electrical circuits and d evices testing, they shall be equipped with warning signs, symbols or inscriptions; and any works not related to tests shall be cancelled; and all personnel involved in such works shall be withdrawn.

Power supply for testing of electrical equipment shall be activated according to the written request of the responsible person of the Contractor appointed by special order.

Operating voltage to the newly-mounted electrical installation shall be fed only by the decision of the Working Commission.

If it becomes necessary to eliminate identified defects, the electrical installation shall be de-energizedand put to inactive mode by removing of loops, bus bars, descends to the equipment or by disconnecting of cables; while deenergized live parts shall be s hortcircuited and grounded for the entire period of defects elimination activities

During cable heating by electric current, is not allowed to apply voltage above

380 kV.

Cases of electrical machinery and devices used for heating under voltage above 42 V, as well as metallic cable sheathing shall be grounded. On heating areas, fire-fighting equipment shall be arranged and watching shall be established.

When heating the compound for filling of the cable boxes and funnels indoor, ventilation shall be provided.

Containers used for heating shall comply with fire safety requirements.

It is not allowed to use uncommissioned, as specified, switchgears, boards, panels and their separate branches, nor connect them as temporary electrical mains and installations, nor perform electric installation works on installed electrical installation ready for setting, without permission of service engineers.

    1. Start-up and commissioning

The start-up and commissioning activities shall be performed in accordance with mandatory attachment 1 to SNiP 3.05.05-84 "Technological equipment and technological pipelines", SNiP3.05.06-85 "Electrotechnical devices" and appropriate IEC standards.

Testing of electrical equipment shall be performed in accordance with SOU-N EE 20.302:2007"Electrical equipment test standards".

When performing the start-up and commissioning activities, the Contractor shall meet the requirements of the "Rules of electrical installation arrangement" (PUE), working documentation and manufacturer's operational documentation.

Prior to the start-up and commissioning activities, the Contractor shall:

а) elaborate and coordinate with the Employer the working program and start-up and

commissioning performance project, including safety engineering measures;

б) prepare sets of measuring devices, test equipment and accessories.

The Contractor shall perform verification of installed electrical equipment, with its energizing from test circuits on individual devices and functional groups.

Energizing of equipment which is under set-up shall be performed only in absence of the electrical installation personnel in the set-up area, following the safety engineering rules.

The start-up and commissioning works are considered completed after obtaining required electrical parameters and m odes on electrical equipment, as specified by the design, providing stable technological conditions.

The start-up and commissioning works are considered completed after signing the start-up and commissioning acceptance certificate.

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