The RVR-10/8000 and RVRZ-10/8000 indoor disconnectors are robust vertical-break devices for three-phase 6–10 kV systems, designed for off-load switching of individual circuit sections and, for the RVRZ version, for earthing of de-energized sections via integral earthing switches. High thermal and dynamic withstand, a raised rated current of 8,000 A, availability of manual and motor operators, and a comprehensive system of mechanical and electrical interlocks make the RVR(Z)-10/8000 an optimal choice for KRU/KRUN, KSO, MSB, distribution points, and dedicated bus-sectioning cabinets. The design provides a visible isolating gap in the main circuit, enhancing operational safety and maintenance, while the modular architecture allows tailoring to project requirements and specific cubicle envelopes.

Technical data

Application

RVR and RVRZ disconnectors are applied in power supply and distribution tasks including:

• Busbar sectionalizing and redundancy in KRU/KRUN, KSO, MSB and 6–10 kV distribution points.
• Off-load isolation of incomers, feeders and connections with a visible isolating gap and subsequent application of earthing (for RVRZ).
• By-pass and maintenance jumpers at substations; temporary shunting of network sections during planned maintenance.
• Safe separation of bus sections at high bus currents - up to 8,000 A.
• Outfitting capacitor banks, reactor cubicles, communication/metering cabinets, and distribution of industrial process loads.

Typical installations include prefabricated transformer substations (KTP), single-sided service cubicles (KSO), metal-enclosed switchgear (KRU, KRUN), main switchboards (MSB), as well as special-purpose cabinets within indoor substation rooms and plant electrical areas. In standard cells the device can integrate auxiliary contacts, inter-pole synchronization links, and interlocks with adjacent apparatus. The disconnector is designed for long-term operation under intensive duty, including high service currents and short-time overloads.

Service conditions

RVR/RVRZ are manufactured for indoor, weather-protected locations in accordance with EN/IEC 60721-3-3, ensuring reliable operation under the following basic conditions:

• Installation altitude up to 1,000 m above sea level.
• Ambient temperature: -45 °C to +40 °C.
• Relative humidity up to 80% at +20 °C (without condensation).
• Non-hazardous environment free of conductive dust and aggressive chemicals causing accelerated corrosion.
• Mechanical impacts per project specification; permissible operation with vibration from process equipment within typical switchgear limits.

Upon request the design can be adapted for extended conditions: increased seismic resistance, enhanced corrosion protection, low/high temperature versions, and special builds for critical infrastructures with elevated reliability requirements. To minimize dust and moisture effects, follow the cell operation guidelines (ventilation/heating, room dryness, absence of aggressive vapors).

Design and layout

Structurally, the RVR(Z)-10/8000 is a vertical-break, single-pole disconnector installed as three single-pole units on a common baseframe. The poles are operated synchronously through an inter-pole linkage and a drive shaft. The assembly includes:

• Baseframe (plinth) with drive shaft and lever system transmitting torque to the moving blades.
• Support insulators of high mechanical strength carrying the fixed contacts, and a traction insulator isolating the operating linkage from high potential.
• Contact system with copper fixed contacts (optionally with wear-resistant plating) and moving blades featuring spring packs to generate and stabilize contact pressure.
• Contact pressure release mechanism (cam and latching units) to reduce operator effort at end positions and extend contact pair life.
• Earthing switches (RVRZ) - a copper bar on posts linked to the drive shaft; when closed, the bar engages lamellas mounted on the lower shelves of the fixed contacts. Spring elements provide pressure in the lamellar units.
• Visible isolating gap in the main circuit for visual confirmation of disconnection; blade geometry and contact arrangement ensure clear position indication.

For integration in switchgear cubicles, various cable/bus entry directions (top/bottom) and connection options are supported: to rigid busbars, flexible bars, or cable lugs via transition pieces. Contact pads and bolting patterns are coordinated at the design stage to simplify integration into existing terminal zones. Mounting interfaces follow standardized footprints; adjustment features ensure busbar alignment and smooth drive kinematics.

Maintainability is supported by convenient access to adjustment points and inspection of spring units, lamellar contacts, and bearing supports of drive shafts. Extended sets of auxiliary contacts can be fitted for “Closed/Open/Earthed” signalling to SCADA. On request, inter-device links and brackets are supplied for key interlocks with load break switches, vacuum circuit breakers, and door interlocks.

Safety and interlocking

Operational safety and prevention of mal-operations are ensured by multi-layer interlocks:

• Mechanical interlock prevents closing the earthing switch with the main blades closed and vice versa.
• Key interlocks (optional) enforce the process sequence within the cell and adjacent equipment (e.g., “lock–door”, “lock–breaker”, “lock–earthing switch”).
• Electrical interlocks via auxiliary contacts implement logic inhibits in d.c. control schemes.
• Padlocking of handle/shaft in end positions prevents inadvertent operation during work.
• Visible isolating gap and clear blade position indication support visual status control as per electrical safety practices.

Important: the disconnector is not intended to interrupt load current - load switching is performed by appropriate switching devices (load break switch/circuit breaker), after which the disconnector is opened. Following this sequence preserves equipment life and safety.

Versions and options

The base RVR(Z)-10/8000 range is complemented by options to fine-tune the device for a specific task, cubicle, and automation level:

Standards compliance

RVR(Z)-10/8000 disconnectors are designed and manufactured in line with applicable codes and standards. Subject to agreement with the customer, compliance can be ensured with international and national standards relevant to medium-voltage disconnectors and switchgear:

• IEC 62271-102 - Disconnectors and earthing switches.
• IEC 62271-1 - Common specifications for medium-voltage switchgear and controlgear.
• IEC 62271-200 - AC metal-enclosed switchgear and controlgear for indoor installation (for equipment within KRU/KRUN).
• EN/IEC 60721-3-3 - Classification of environmental conditions for stationary use at weather-protected locations (environmental classes for indoor application).
• IEC 61936-1 - Power installations exceeding 1 kV AC (general requirements).
• EN 50522 - Earthing of power installations exceeding 1 kV AC.

Selection criteria and compatibility

When selecting a disconnector for a specific cell, consider bus current loading, available clearances and creepage distances, required interlocks, operator type (local/remote), and integration with the existing SCADA system. For retrofit projects, transition bars and adapters can be supplied to match existing dimensions, along with “remove/install” mounting packages to minimize downtime.

Engaging contractors, OEMs, and investors

We are open to cooperation with manufacturers and private investors interested in organizing production of the RVR-10/8000 and RVRZ-10/8000 disconnectors. We provide process support, typical route cards, guidance on shop equipment (busbar bending/cutting, machining, galvanic/powder-coat areas), and lists of instruments and gauges for incoming and final inspection. Where needed, we involve proven partners for insulators, current-carrying parts, and spring/lamellar blocks and arrange logistics for serial supply. Contract/toll manufacturing under your brand (white label) is available with full documents and test reports for the pilot lot.

Documentation set available for manufacturing RVR-10/8000; RVRZ-10/8000:

– Pre-tender package (questionnaires, specification, schematic diagrams, 2D outline drawings for cell integration, interface lists and connection variants).
– Full production design package for in-house manufacturing: part and assembly drawings, BOMs, purchased-part lists, assembly and kinematic schemes, adjustment schedules, O&M documents (datasheet, operating manual, records).
– 3D models (formats: STEP/Parasolid, SOLIDWORKS, Inventor) and flat patterns for CAM/laser cutting (DXF, DWG).
– Process instructions: route cards, lubrication/adjustment charts, equipment/tooling lists, incoming/in-process/final QC instructions, and type/routine test program & methods.
– If required - adaptation of documentation to your standard cubicles, preferred purchased-parts base and local codes, plus turnkey support for serial ramp-up.

Why work with us

• Faster time-to-market: pilot-lot release without separate prototypes thanks to high unification and proven processes.
• Optimized engineering costs: the documentation set enables production with mid-level engineers backed by our consulting.
• Flexible localization: sourcing aligned to your geography and capabilities to build a resilient supply chain.
• Project integration: tailoring of standard solutions to customer requirements (interlock schemes, extended signalling, layouts for tight envelopes).

For additional information on RVR-10/8000; RVRZ-10/8000 disconnectors, please contact: inbox@proekt-energo.com

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