CREWE "Classics" of the D-40P series allows to look at questions of design RU-35 of kV in a new way. Thanks to wide functionality and flexible architecture of cases, the most difficult circuit decisions can be realized, providing at the same time the high level of convenience of operation and service of the equipment CREWE

High functionality

By CREWE "Classics" of the D-40P series it is designed so that as much as possible to satisfy needs of the customer of any branch accessory. Cells are calculated on rated current to 1250 A and current of shutdown of the switch to 25 kA.
At the expense of a wide grid of schemes of primary connections, in total with options of connection both VL-35 of kV, and KL-35 of kV high flexibility of decisions at design and application of data of CREWE is reached. Installation of power transformers of own needs in cases of CREWE of "Classic" of D-40P does not demand assignment of separate zone TSN and is carried out in a case of CREWE in a general series of RU that significantly saves space under the RU installation. And the possibility of installation of cases of CREWE in the modular warmed buildings allows to exploit them in severe climatic conditions.

Quality

Cases of CREWE of "Classic" are reliably protected from corrosion throughout all service life. Production of cells is carried out from a quality steel sheet with an alyumotsinkovy covering. External elements of the case (a door, lateral panels, etc.) are painted by powder paint which possesses high resistance to atmospheric and mechanical actions. At production of the case and fastening of details of a case it is not used welded connections which in use can become the centers emergence of corrosion.

High localization ability

Cells of CREWE of "Classic" possess high resistance to arc influences at emergence of accident in a case that promotes minimization of damage and reliably protects service personnel from influence of an electric arch. The internal volume of a cell is divided on four functional isolated a compartment by fireproof metal partitions which reliably localize an arch within one compartment. Three compartments have channels for the organization of the directed emission of gases up that ensures safety of service personnel. As arc protection in basic execution trailer switches and valves of dumping of excessive pressure are used, by the additional order use of fiber-optical or photothyristor system of arc protection is possible that allows to disconnect as fast as possible the damaged chain site, to thereby lower time of the destroying influence of an electric arch.

Simplicity and presentation of switching operations

Work with CREWE differs in simplicity and convenience. Management of all operations on service of a case is made by only two handles of management.
Cases of CREWE of "Classic" possess high informational content, presentation and safety of the made operations. For this purpose on a facade of a compartment of auxiliary chains the following elements are placed:

  • blocks of indication and control of microprocessor devices of protection and automatic equipment;
  • symbolic circuit of conditions of contacts of the switching equipment and situation KVE;
  • buttons of management and equipment of the local alarm system;
  • indicators and nests for verification of tension on current carrying parts of a compartment of accessions and an order of alternation of phases.

For visual control of provision of the main contacts of the power switch the door of compartment VE is supplied with observation ports, and KVE has the index of situation which is rigidly connected with a switch shaft.

Safety

Full safety of operation of CREWE of "Classic" is ensured by constructive decisions, simplicity and presentation of switching operations, and also the thought-over system of the mechanical and electromagnetic blocking preventing wrong and incorrect actions of service personnel.
For protection of personnel against emissions of products of burning of an arch in a corridor of service of a door of compartments VE and accessions are equipped with the additional protective metal screens installed from the inside of a case.

Unilaterally service

Cases of CREWE of "Classic" of the D-40P series of unilateral service that gives an opportunity of their wall installation, saving at the same time space under their installation.

Application of modern microprocessor protection

Schemes of auxiliary chains of cases of CREWE "Classics" can be executed on various microprocessor devices of protection, management, automatic equipment and alarm system. The accounting of the electric power can be carried out on electronic or multipurpose microprocessor counters of electric energy. There is an ability to integrate the distributing device into SCADA system.