Reconstruction of 10 kV power supply - Ford Car Assembly Plant

General Data

The design of the 10/04 kV transformer substation for the new welding workshop was developed on the basis of the design specification issued by Ford Motor Company CJSC No. DB5 dated 18.02.2008.

According to the degree of reliability, power supply of electrical installations connected to the designed KTP11 belong to the II category of electricity consumers .

Power supply of KTP11 T19 and T20 transformers is provided from existing RP10kV , cells No. 9 and No. 23.

10/0.4 kV cable lines:

The design provides for the laying of cable lines 10 and 0.4kV.

Cable lines of 10 kV (from the existing cells No. 9 and No. 23 RP10kV to the designed RM6 switches, and from RM6 to T19 and T20 transformers) are carried out by APvPu10 brand cable section 3 (1х95/35). Cables are laid openly on the existing and again mounted cable designs (from RP10kV to RM6) and in the designed cable channels (from RM6 to T19 and T20).

Cable connections from transformers T19 and T20 to RU0.4kV are made by bus bridges Canalis KHF38, 3800A, IP55, 3L + PEN, 380V, 50 Hz of the company "ShneiderElectric" coming complete with transformers .

10kV switching device.

The design provides for the installation of compact power distribution devices KU10kV type RM6.

KU10kV performs the functions of connection, power supply and protection of two transformers T19 and T20 with capacity of 1600kVA, using load switches. Switching devices and busbars are located in a sealed housing filled with gas and "sealed" for the entire service life.

The project uses KU10kV without the possibility of expansion, NEIDI scheme.

The applied KU10kV ensures complete safety of maintenance personnel, complete protection from external influences and operation safety.

To protect transformers, gas-insulated switches 200A with setpoints according to calculations (set point map) are used.

Connection of the 10kV supply cable is made through the through insulators of type "A": 200A; 16kA/1c and 35kA "plug-in" contact.

Transformer 10/0.4kV.

The design envisages installation of two three-phase power dry transformers with cast insulation of TRIHAL 1600kVA 10/0.4kV type in KTP11; IP31 with a set of vibration damping supports and a thermal protection unit of the company "ShneiderElectric."

Protective grounding

The design envisages the arrangement of the internal grounding circuit connected to the existing external grounding device common to 10 kV and 0.4 kV networks in the room KTP11. The designed ground loop is made of steel strip size 40x4mm.

Protective grounding shall be provided for all electrical equipment, cable structures, pipes, neutrals of power transformers, normally non-current-carrying parts of electrical equipment.

All connections of the steel conductors of the grounding conductor system and the grounding bus shall be made by welding (a bolted connection corresponding to the requirements of the applicable standards is also allowed).

The resistance of the grounding device must be no more than 4 ohms.

Protective electrical safety measures

The design provides for the following protective electrical safety measures:

- from direct touch:

• main insulation of current-carrying parts;

• 10 kV switchgear packages with protection degree IP44 were used;

• standard grounding device for outgoing lines and supply cable is provided;

• 10 kV current-carrying parts provide safe distances to building structures and other current-carrying parts.

- from indirect touch:

• protective grounding of electrical installations and other conductive parts;

• use of protective zero conductor in 0.4 kV group network;

• potential equalization system;

• protective automatic power-off;

- Other electrical safety measures:

• 10 kV switching devices with a system of interlocks from erroneous actions of maintenance personnel were used;

• On all electrical equipment, clearly distinguishable operational names from all sides of the service;

• The switchgear rooms shall accommodate the approved single-line RP execution circuits.

Electricity accounting.

Technical assignment and design do not provide for installation of devices for metering of consumed electric power.

Organization of operation.

The customer's personnel (FMK CJSC) shall be responsible for the operation of the electrical plant.

Internal electrical networks and electric equipment are operated by personnel of the customer according to requirements P M0162001 SWEAT ;

RD153-34.003.150-00 and operating instructions for electrical installations.

By order of the head, the person responsible for the electric industry is appointed, as well as the person replacing him from among the ITRs who have successfully passed the knowledge check in the bodies of Rostekhnadzor.

The organization of operation of the electrical installation of the facility is assigned to the person responsible for the electrical management (V qualification group up to and above 1000V).

All work on the existing electrical plant shall be carried out by qualified personnel with appropriate tolerance groups in accordance with PTEEP and POT.RM0162001.

Electrical installations shall be equipped with basic and auxiliary protective equipment in the scope of requirements

SWEAT .PM0162001.

Protective equipment shall be inspected and shall be stamped with the dates of the following inspections.

All elements of the electrical installation shall be marked with appropriate markings and inscriptions (safety signs, assignment of groups on the boards, direction and their marking).

The personnel servicing the electrical plant shall undergo an annual TB knowledge check, and the electrical plant shall undergo preventive tests.

Prior to operation, standard fire protection and electric shock protection kits shall be placed in the electrician's room in accordance with the "Instruction on the use and testing of protective equipment used in electrical installations."

Protective equipment shall be inspected and stamped with the dates of the following inspections.