Auxiliaries panel of the Nuclear Subcritical Installation "Neutrons Source" for NSC KIPT, Kharkov

The project included manufacturing of a two-section switchboard for powering the equipment of the subcritical nuclear installation “Neutrons Source” with seismic resistance at least 7 points on the MSK-64 scale and rated current 4000A. Switchboard type – Okken IP31 (Schneider Electric)
890-2

Okken is the foundation for bold design decisions

The switchboard was designed in strict accordance with the customer’s technical assignment, which included increased reliability requirements. The use of Okken as a system made it possible to solve several problems at once:

The switchboard was designed in strict accordance with the customer’s technical assignment, which included increased reliability requirements.

 

The use of Okken as a system made it possible to solve several problems at once:

 

  • Okken low-voltage switchgear has a modular design, which makes it easy to change or upgrade in case of technological process development.
  • The switchboard was designed with free slots to add new functions or extra motor feeders, even at the last minute
  • The Okken LV switchboards incorporate the best safety and protection systems, preventing on-load operation to guarantee safe operation and maintenance
    Switchboard protection degree IP31
  • Live parts are protected by screens guaranteeing an IP20 degree of protection.
  • The structure of the cabinet provides the seismic resistance required by the project, which is confirmed by laboratory certificates
890-2

Partitioning form 3b

Form 3b is provided for all feeder cells:

 

  • The terminals for the external conductors are separate from the busbars.
  • The functional blocks are separated from each other and separated from the busbars.
  • The terminals are separated from the busbars, but not separated from each other.
890-3

Combination of withdrawable and Polyfast plug-in units

  • Plug-in blocks were used to connect the distribution feeders Polyfast system allows connecting and disconnecting conductors of power and auxiliary circuits outside the complete device
  • For fans feeders, pumps, and other equipment we used withdrawable cells that expand the possibilities for operational maintenance of assemblies.
890-4

ATS and additional protective functions of Masterpact NW circuit breakers are based on the BMRZ microprocessor relay protection units.

All protection functions, operation of the zero-sequence protection transformer, operation of the automatic transfer switch, protection relay actuation, etc. were tested at the facility during commissioning and installation supervision
890-10

Two bus ties and two incomer Canalis KTA busbars

The switchboard was supplied as a complete set with Canalis KTA 4000A incomer busbars and KTA 1600A bus couplers.

  • Complete system coordination from Schneider Electric ensures maximum safety for life and property, uninterrupted power supply, expandability, and ease of installation.
  • Canalis busbars provide safety in the event of a fire
    Canalis busbars reduces the risk of electromagnetic field exposure
  • The compact design of the Canalis KT takes up very little space
  • IP55 splash and dust protection
  • The required tightening torque for bolted connections is provided by shear head bolts

Using 3D modeling tools

A detailed 3D design of the switchboard allowed us to reveal and avoid mistakes, which could only be identified at the assembly stage.

OUR OTHER PROJECTS...