Switchboards

Designer and electrician assistance

Current load on the wires and cables, rubber, PVC insulated

Permissible continuous currents for wires with a rubber or PVC insulation, cords with rubber insulation, and cables with rubber or plastic insulation in the lead, PVC and rubber covers are shown in Table (1-9) according to the EMP (Section 1, it.1.3.10 -1.3. 11). The values of currents are adopted for the temperatures: +65 of cores, ambient air +25 and land +15 º C.

While determining the number of wires installed in one pipe (or cores of a multi-core conductor), the zero working four-core conductor of three-phase current, as well as grounding and zero protective conductors shall not be considered.

Control switchboards of motor with frequency converters (SFC) and soft starters (SSS)

Control switchboards of motor with frequency converters (SFC)

Control switchboards of motor with frequency converters (SFC) are low-voltage complete devices designed to control the speed of three-phase asynchronous motors with power from 0,18 to 630kWt by changing the frequency and amplitude of voltage. 

Automatic transfer switch (ATS)

Automatic transfer switch (ATS) is designed to restore power for the consumers through the automatic connection of emergency power when disconnected from the working power source and automatic restoration of basic supply, at restoration of the working power source.

ATS are widely used in electrical supply systems in industrial plants, communication facilities and transport to ensure the reliability of electricity for consumers of the 1 st and 2 nd category (see REI).

Distribution, lighting and apartment switchboards (DS, LS, AS)

Distribution switchboards (DS) and lighting switchboards (LS) are assigned for reception and distribution of electricity with voltage of 380/220 V of three-phase AC, 50 Hz, as well as for occasional (not more than six times per hour) commutations and protection of single-phase off-lines from over-voltage and short circuit. Switchboards are designed for installation in industrial and public buildings. They are mounted on a vertical surface. Nominal operational mode is long. Apartment switchboards (AS) are designed for supply of residential apartments and are used for input and distribution of electricity with nominal voltage of 220V AC 50Hz and protection of the groups of lines from short circuit and overload. Switchboards are installed in the apartments, individual houses, cottages, garages, etc. 

Storey detection and distribution switchboards (SS)

Storey switchboards are designed for receiving, distributing and monitoring (if a meter is available) of AC in power systems with the earthed neutral, to protect lines from overload and short circuit currents and non-permissible leakage currents into the ground (if protective cutout device – PCD – is available), and for placement of devices of radio, telephone and television networks.

Input distributive devices (IDD)

Input distributive devices (IDD) are designed for reception, distribution and monitoring of electric power AC systems with earthed neutral, and to protect lines from overload and short circuit currents.

The devices are intended for indoor switchboards installations in residential and public buildings.
The use of IDD is permitted for other objects with the similar scheme of power supply.

Distribution points (DP)

Distribution points (DP) are designed for power distribution and protection of lines and consumers from short-circuit, overload and leakage currents.
   
Distribution points are designed for installation in various fields of industry and housing. They are recommended for use with switchboards IDD, IRB.

Input and input-registration boards (IB and IRB)

Input and input-registration boards  (IB and IRB) are designed to receive and monitor the  AC electricity (only IRB) of systems with the earthed neutral.
The boards are designed for installation in industrial, public, municipal and other objects of energy supply. The metal structure consists of one or more frames, connected in line, on which various panels and doors are established.

Switchboards of inner substation and external lighting (SL-48, SEL)

Switchboards SL-48 are designed for receiving and distributing of electric power voltage 380/220V three-phase AC, 50 Hz, as well as for occasional (not more than six times per hour) of switching and protection of single-phase off-line from overload and short circuit currents. Installed inside the switchboard room and differ from the external lighting switchboards SEL so that the apparatus is used as an introductory changeover switch to enable the work of the switchboard from two inlets. They are mounted on a vertical surface. Nominal mode is long.

Condensing units (CU-0, 4kV)

Condensing units CU-0, 4kV are designed for automatic compensation of reactive power loads of three-phase electrical network consumers with voltage 0,38 (0,4) Kv, frequency of 50 and 60 Hz. CU-0,4 are designed for installation in industrial and municipal facilities.

Condencing units KU-0, 4 are equipped with capacitors of Varplus2 series, special contactors Telemecanique, and regulators of reactive power Varlogic.

Control Boxes Я 5000 Series

Low-voltage complete devices up to 4000 A (LCD-0, 4 kV)

Complete low-voltage devices such as Prisma Plus(LCD) are intended for reception and distribution of electric energy in thecircuits of three-phase AC voltage 380/220V, frequency 50Hz, and for protectionof the lines from short circuit and overload. 

LCD are made functionally in the form of induction,sectional and distribution switchboards, which are mounted in shields