Purpose and application

The excavator medium-voltage distribution cubicle 2KVE-6 (orig. 2КВЭ-6) is intended for receiving, distributing, and switching three-phase AC power at 6 kV, 50/60 Hz, on mining machinery. The cubicle is installed on the revolving platform of an excavator inside a closed, unheated housing and protects electrical equipment against overloads, short-circuits, and unacceptable undervoltage, while enabling operational switching in a non-hazardous area (no explosive atmospheres).

The cabinet is adapted for harsh open-pit conditions: vibration, dust, moisture, temperature swings, and shock. It is used on excavators, draglines, spreaders, conveyor lines, and auxiliary pit mechanisms. The design prevents arc-byproducts from reaching personnel and confines damage within a single compartment.

• - Typical loads: hoist, crowd/boom/handle, swing drives, pumps and fans, conveyors.
• - Neutral regime: isolated or grounded via arc-suppression reactor/active resistor (per project).
• - Supplied to a completed questionnaire with project-specific configuration for the excavator model and service conditions.

Construction and safety

2KVE-6 is an enhanced welded steel frame with powder-coat finish. The internal volume is partitioned by solid metallic and insulating barriers into independent compartments: switching compartment (vacuum circuit-breaker and CTs), protection/auxiliary compartment, fuse/VT compartment, and disconnector & cable termination compartment. A shutter mechanism automatically closes the fixed contacts when the withdrawable unit is moved to the test/maintenance position; provision for padlocking is included.

• - Doors with multi-point locks and viewing windows; pressure-relief flaps in MV compartments.
• - Fast-acting earthing switch with making capacity (make-proof), plus mechanical and electrical interlocks against mal-operations.
• - Vibration-resistant fasteners, top/bottom cable entry (per spec), shielded raceways for secondary circuits, anti-condensation space heaters.

Equipment and protection

Typical scope includes a 6 kV vacuum circuit-breaker (rating per project), current and voltage transformers, fuses, surge arresters, disconnector, earthing switch, and voltage-presence indicators. Protection and automation are implemented on electromechanical relays or microprocessor-based IEDs.

• - Protections: overcurrent/voltage functions, AR/ATS (autoreclosing/automatic transfer), arc-flash optical protection, drive start/interlocks, event log.
• - Control: local/remote; option for motorized earthing switch and powered movement of the truck.
• - Communications: telecontrol and interfaces for integration with the mine’s SCADA/DCS (per spec).

Service conditions

• - Installation inside a closed, unheated housing on the excavator’s revolving platform; environmental conditions per EN/IEC 60721-3-3 (weather-protected indoor use).
• - Ambient temperature: from -40…-25 °C up to +40 °C (depending on version and spec); altitude up to 1000 m.
• - Non-hazardous area, free from conductive dust in concentrations that would impair insulation or contacts.
• - Resistance to vibration and mechanical impacts - group M6 per GOST 17516.1 (or as defined by the project/IEC 60068-2 test program).
• - Enclosure degree of protection - IEC 60529, baseline IP32 (higher ratings available on request).

Standards compliance

• - IEC 62271-200 - AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV.
• - IEC 62271-100 - AC circuit-breakers.
• - IEC 62271-102 - AC disconnectors and earthing switches (earthing switch with making capacity).
• - GOST 17516.1 - general mechanical environmental requirements (group M6), or per IEC 60068-2 test program.
• - EN/IEC 60721-3-3 - environmental conditions for stationary use at weather-protected locations.
• - IEC 60529 - degrees of protection (IP code).

Technical data

We offer documentation for manufacturing 2KVE-6 cubicles:

• - Preliminary technical package for tenders (questionnaires, layouts, specifications per the client’s specification).
• - Working drawings, 3D models, and a complete design dossier (BOM & CAD) for in-house production; support with supplier cooperation for assemblies.
• - Adjustment of documentation to the project and your manufacturing capabilities.
• - Development of transition/adaptor solutions for interfacing with third-party equipment and existing switchgear.

Benefits of working with us:

• - No need to maintain a large team of highly qualified design engineers - you receive a ready-to-build documentation set.
• - Launch series production without prototypes - proven technical solutions with implementation support.
• - Consulting on all details of manufacturing and commissioning the 2KVE-6 series.

For additional information, please contact: inbox@proekt-energo.com

…and, as is well known, an error made at the design stage costs 10× in manufacturing and 100× in operation…

PDF - Download technical information for 2KVE-6