Draft RP (NPP and POS) of 6 kV distribution point

Contents

CONTENTS

Explanatory Note

General Data

Space planning solutions

Characteristics of RU-6kV circuit

Grounding and protective electrical safety measures

Lightning protection

RP's own needs

Blocking

Organization of operation

Main set of working drawings ()

List of working drawings of the main set

List of referenced and attached documents

General Instructions

RU-6kV. Electrical schematic diagram

QS0 Order Data Sheet -

RP Plan. Equipment placement

RP Plan. Section I-I

Lighting plan in RP

Plan of RP lighting in the technical subpole

RP grounding plan

Grounding Plan in Utility Subpole

RP Security Alarm Plan

Cable Layout Plan

ShBPZS-2 case. General view

ShBPZS-2 case. Electrical schematic diagram

WSV cabinet. General view

WSV cabinet. Electrical schematic diagram

Specification (WBS)

KSO-285 chamber. Input cell of 1 section with SEPAM + S42 with ATS, TM, with lock by AChR. Electrical schematic diagram

KSO-285 chamber. Input cell of 2 sections with SEPAM + S42 with ATS, TM, with lock by AChR. Electrical schematic diagram

KSO-285 chamber. Cell of section switch with SEPAM + S40 with ATS, TM, with interlocking by AChR. Electrical schematic diagram

KSO-285 chamber. Outgoing line cell with SEPAM + S20 with TM. Electrical schematic diagram

KSO-285 chamber. TN cell of 1 section with TM, with protection against ferroresonance. Electrical schematic diagram

KSO-285 chamber. TN cell 2 section with TM, with protection against ferroresonance. Electrical schematic diagram

Diagram of RU-6kV. Blocking

Cable log

Frame for installation of CSR chambers

Equipment and Material Specification ()

General Instructions

The works shall be performed in the presence of the network section master of the district Cable network.

Perform works after performance of organizational and technical measures ensuring safety of works.

Erection works shall be performed in accordance with the current requirements of PUE, SNiP 3.05.0685 and Intersectoral Rules for Labor Protection (Safety Rules) during operation of electrical installations.

All necessary equipment, cable products and materials shall have the necessary quality certificates and compliance with the standards.

Connect the metal frames of the installed equipment to the existing grounding loop with a 40x4 mm steel strip.

Measure the resistance of the grounding device and check its integrity. The resistance of the grounding device shall not exceed 4 ohms at any time of the year.

Lead the zero wire from the transformer neutral to 0.4 kV board by busbar on insulators.

All contact connections shall be made with a steel fastener having a protective coating. Copper contacts of electrical devices at the point of connection of aluminum cable shall be made on the whole surface.

Explanatory Note ()

General Data

This project is a technical solution for the electrical part of the distribution point (RP).

RP is designed for power supply to the facility: residential buildings at the address: village. Strelna, st. Lviv section 1.

Permitted power - 1928 kVA.

The project is based on:

Technical conditions issued by Petrodvorets Electric Network OJSC No.

Space planning solutions

The building of the distribution substation of the block-distribution station (BDP) type consists of two identical modules. Each of the modules has above-ground and underground parts in the form of volumetric reinforced concrete structures .

The underground-bottom part of the module is a volumetric reinforced concrete basement (compartment) installed on the foundation from a monolithic reinforced concrete slab, designed to insert cable lines and lay connecting cable bridges. In the following description, part of the module is abbreviated as "volume pit" (OP).

The above-ground part of the module is a volumetric reinforced concrete housing installed on a volume pit from above, designed to accommodate electrical equipment (RU6kV). In the following description, part of the module is abbreviated as "RP unit."

Input and output of power CL is carried out through OP, which has rectangular thinned casts ("windows of cable entries") in the walls along the entire perimeter, through which after their opening asbestos cement pipes are laid with subsequent sealing of voids. There are hatches with detachable metal covers in the BRT floor, which provide access to OP.

3. Characteristic of scheme RU6 of kV

As a switchgear (switchgear) in BGU, KSO285 cells manufactured by Electrician 55 are used. Structurally, RP 6kV are made of two prefabricated units, each of which is located in its own part of BRP. The 6kV switchgear includes two input cells, four outgoing line cells, two cells with auxiliary transformers and measuring transformers and a section switch cell. Assembly buses and vacuum switches are arranged inside the housing.

Vacuum switch is designed for rated current I nom = 630 A.

Relay protection is performed on "Sepam" 1000 + units.

The "Sepam" S42 units, the "Sepam" S20 outgoing line cells and the "Sepam" S40 section switch are built into the input cells.

The chambers have ZETO production load switches. Each bus section is protected from overvoltage by non-linear overvoltage limiters (PDP) PT/TEL6/7,5Y3.

Grounding and protective electrical safety measures

In accordance with the requirements of the regulatory and technical documentation, the design provides for the implementation of the grounding device (ZU).

The artificial grounding connector of the memory is provided in the form of a remote contour grounding connector consisting of vertical grounding connectors connected to each other by horizontal grounding connectors.

As horizontal grounding conductors, strip steel 40x4 mm laid at a depth of 0.5 m was used. Vertical grounding conductors are provided from angular steel 63x63x5 mm with a length of 4.0 m.

The artificial grounding conductor is provided to be connected to the natural grounding connectors defined in item 1.7.109 of PUE.

The permissible value of the grounding device resistance is selected taking into account the actual soil resistivity and capacitive ground fault current in the 6 kV network. The design resistance value of the memory is not more than 4 ohms.

The internal grounding circuit is designed to be made of 40x4 mm strip steel, laid at a height of 0.8 m from the floor of the premises.

It is provided to connect the following to the TC grounding device:

open conductive parts of electrical installations;

metal shells and armor of cables;

external conductive parts (gate frame, etc.).

All construction reinforced concrete and metal structures and parts of the TP building shall be connected to the internal grounding loop using steel conductors with cross section of at least 50 sq.m. (wire d = 8mm or strip of 25x2.5mm). The connection shall be made by means of electric welding .

In RU6 kV for grounding of circuit sections there is a stationary grounding (by grounding knives of load switches).

In addition to grounding, the following electrical safety measures are also provided:

reduced voltage of 36 V for lighting fixtures of the inner volume of the chambers and lighting of the technical subpole (said luminaires are powered through a special separating step-down transformer);

application of protective shutdown device with actuation current not more than 30 mA for plug sockets of electrified tool connection,

PI configuration by safety equipment.

All conductors of circuits with voltage up to 220V are provided to be laid in separate PVC pipes.

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Lightning protection

Special measures for lightning protection of the substation are not required, since the metal reinforcement of the BRP and OP frames has a rigid metal connection with the internal grounding loop, which corresponds to the RD 34.21.12287 "Instruction on lightning protection of buildings and structures" of the Ministry of Energy of the Russian Federation and SO15334.21.1222003 "Instruction on lightning protection of buildings, structures and industrial communications."

TP's own needs

For food of chains of secondary switching of the RU6 cameras of kV and chains of own needs of IS (electric illumination, connection of testing laboratory, the electrified tool and security alarm system) the special case of own needs is provided.

The auxiliary cabinet provides for ALT for the following circuits:

security alarm,

electromagnetic interlock power supply circuits.

The RP provides for a security alarm with the action of a loud battle when any door is unauthorized to open. The alarm is triggered with a small time delay to ensure its disconnection by the operating personnel of Petrodvorets Electric Network OJSC.

9. Blocking

The following mechanical interlocks are provided by the cell manufacturer:

interlock preventing switching on the disconnector when the earthing knives are on or turning on the earthing knives when the disconnector is on;

interlocking, which prevents disconnection of the disconnector when the switch is on, or actuation when the switch is on;

The design provides for blocking, which excludes switching on and off by the section disconnector of load current.

The disconnector drive is blocked by electromagnetic block-locks of ZB1M type with electromagnetic switch for 110V DC voltage. The interlock circuits are supplied from the auxiliary cabinet.

Organization of operation

Operation of electrical installations (PU) of the facility should be carried out in accordance with the requirements of the current regulatory and technical documentation (NTD) and the requirements of the manufacturing enterprises of the PU.

The head of the organization in charge of RTP shall ensure:

maintenance of PU in operable condition and their operation in accordance with the requirements of PTEEP, PET RM and other NTD;

timely and high-quality maintenance and repair of electrical equipment;

training of electrical personnel and verification of knowledge of operating rules, safety procedures, job descriptions and production instructions;

reliability of electric installations operation and safety of their maintenance;

prevention of the use of electrical installations, technologies and working methods that have a negative impact on the environment;

recording and analysis of violations in the operation of electrical installations and taking measures to eliminate the causes of accidents;

development of job descriptions and production instructions for personnel;

compliance with the regulations of the state energy supervision bodies.

To directly perform the functions of organizing the operation of the PU before the start of operation, a person responsible for the electric utility must be appointed, as well as a person replacing it during periods of prolonged absence (vacation, trip, illness ).

These persons must successfully pass the knowledge test of the current NTD (PTEEP, PET RM, etc.) in the Energy Supervision bodies and have a V qualification group .

PU operation shall be performed by trained electrical personnel.

Prior to operation, the PU must be equipped with electrical protective and fire protection equipment in accordance with the requirements of the current regulatory and technical documentation.

Protective equipment, accessories and tools used in the maintenance of electrical installations shall be inspected and tested in accordance with the requirements of the NTD.

Maintenance personnel shall have the following operational and technical documentation:

Approved EU Working Draft;

As-built working diagram of internal power supply;

Equipment passports with test reports;

Fire Safety Instruction;

Instructions for elimination of accidents and abnormal modes;

Job descriptions;

Occupational Safety Instructions;

Instructions for maintenance of electrical installations;

Regulatory and technical documentation (PUE, PTEEP, PTEESS, PET RM);

Briefing log;

TB Knowledge Check Log;

Operational log;

Fault log;

List of works performed in the order of current operation;

PPM schedules;

List of persons entitled to single inspection of electrical installations;

List of persons entitled to issue orders and permits;

List of works performed by order;

List of positions that need to have an Electrical Safety Qualification Group.

The head of the organization is obliged to organize training, knowledge testing, training of personnel in accordance with the requirements of the NTD.

Appropriate markings and inscriptions (safety signs, assignment of groups on boards, marking, etc.) shall be affixed to the PU elements.

Commissioning should be carried out only after their acceptance by the acceptance commissions in accordance with the current provisions, drawing up an act of admission of the electrical installation to operation and issuing a permit for its connection.

The electrical installation is put into operation if all the necessary operational and technical documentation is available.