RVR-10/2000; RVRZ-10/2000 Indoor Disconnector

The RVR-10/2000 & RVRZ-10/2000 indoor disconnectors are intended to establish a visible isolating gap in medium-voltage circuits and to earth de-energized sections by means of stationary earthing switches (RVRZ versions).
Vertical-break type disconnectors are manufactured in single-pole or three-pole versions. Single-pole units are mounted on a dedicated frame; three-pole units - on a common frame.
RVR versions are supplied without an earthing switch; RVRZ - with an earthing switch on the moving-contact side or on the fixed-contact side.
RVR/RVRZ disconnectors consist of a base (frame), support insulators, contact system, operating (pull-rod) insulator, and earthing switch(es). An operating shaft with levers mounted on the frame actuates the main blades. Where earthing switches are provided, one or two additional shafts with their drives are installed together with a mechanical interlock that prevents closing the earthing switch with the main blades closed, and vice versa. Insulation comprises support insulators and the operating insulator. The contact system includes copper fixed contacts and moving blades. The earthing switch consists of a copper bar fixed to steel posts welded to the earthing-switch shaft. When the earthing switch is closed, the bar engages finger contacts installed on the lower shelves of the fixed contacts. Contact pressure in the axial and separable contacts of the main blades, and in the lamellar contacts of the earthing switch, is provided by springs.
RVR and RVRZ disconnectors are manufactured for the environmental category corresponding to EN/IEC 60721-3-3, with the following service conditions:
- altitude not exceeding 1000 m;
- upper ambient temperature +40 °C;
- lower ambient temperature -45 °C;
- relative humidity up to 80 % at +20 °C.

Technical data

Rated voltage, kV	10
Highest voltage for equipment (Um), kV	12
Rated current, A	2000
Short-time withstand current (3 s), kA r.m.s.	31.5
Peak (dynamic) withstand current (1 s), kA	80
Mechanical endurance (main circuit), O–C operations	2000
Environmental category (replaces GOST 15150 U3)	EN/IEC 60721-3-3

Purpose and application

RVR-10/2000 and RVRZ-10/2000 are operational switching devices for indoor medium-voltage systems rated 10 kV (highest voltage for equipment - 12 kV) with a rated current of 2000 A. They are intended for:
- creating a visible isolating gap during maintenance and operational switching;
- providing safe earthing of de-energized sections via stationary earthing switches (RVRZ versions);
- busbar and feeder sectioning in KRU/KRUN cubicles, KSO panels, MV main switchboards (GRShch), package transformer substations (KTP), and test benches;
- providing technological isolation in transformer, reactor, capacitor bank, incoming and outgoing line circuits;
- use in new and modernized air-insulated switchgear (AIS) and modular cabinets.

Disconnectors are not intended to switch load current or short-circuit current. Operation of the main blades is permitted only with zero load current, and the earthing switch may be closed only when the side to be earthed is confirmed de-energized. For load switching, use load-break switches, vacuum circuit breakers, or contact devices of the appropriate class.

Typical applications include: distribution systems of industrial enterprises, transport and municipal power systems; 6–10 kV substations of utilities; power supply centers for telecom and IT infrastructure; sections of synchronous condensers and capacitor banks; training and test facilities. Options with one or two earthing switches allow flexible interlocking schemes and enhance personnel safety.

Service conditions

Designed for operation in heated and unheated indoor industrial areas in accordance with EN/IEC 60721-3-3. Operating temperature range: -45 °C to +40 °C; average daily relative humidity up to 80 % at +20 °C; altitude up to 1000 m. Non-hazardous (non-explosive) atmosphere without aggressive vapors or aerosols that could cause corrosion of current-carrying parts and insulators. Operation in dusty environments is permissible subject to scheduled cleaning of contacts and insulation.

Mechanical resistance meets the general requirements for industrial electrotechnical equipment (per IEC 62271-1 and applicable IEC 60068 tests): transport shock and vibration within normal categories (micro-impacts during operation, handling during installation, transport in standard packaging). Network frequency - 50/60 Hz. Lightning and switching overvoltages must be limited by protection schemes (relays), surge arresters, and proper insulation clearances within the cubicle.

Operating personnel requirements: actuate the main blades only after confirming absence of load current and under work permit/operating instruction; close earthing switches only after verifying absence of voltage and removing portable earthing on adjacent sections. Arc-quenching devices are not required when the disconnector is used correctly, as it is intended for no-load switching.

Design and construction

The baseline layout includes a rigid welded frame, support and operating insulators, the main contact system (fixed contacts and moving blades), an operating shaft with linkages, an over-center blade mechanism, and one or two earthing switches (for RVRZ versions). The vertical-break design provides a fast, stable separation with a clearly visible gap. Fixed contacts are made of electrolytic copper with wear-resistant plating (e.g., silver/nickel); moving blades are made of high-conductivity copper bars. Spring elements provide contact force optimized for minimal transition resistance.

Support insulators are porcelain or polymer (per project), rated for the required electrical strength inside the cubicle. Where needed, bushing-type insulators for rear bus connections can be provided (similar to popular “rear-connected” layouts). The operating (pull-rod) insulator provides electrical isolation of the drive train.

Drives - manual lever or motor-gear drive. The mechanism provides positive position fixing “Open”, “Closed”, and “Earthed” (for RVRZ) with a mechanical endurance of at least 2000 O–C operations for the main circuit. The earthing-switch shaft(s) are mechanically interlocked with the main blade to prevent conflicting operations. Left/right drive arrangement is available, as well as independent drives for the main blade and for the earthing switch to facilitate integration in KRU/KRUN/KSO cubicles.

The design offers convenient access for routine maintenance: checking spring forces, tightening bolted joints, cleaning and inspecting plated surfaces. To reduce electrodynamic forces under short-circuit conditions, reinforced current bars and additional fasteners are used to prevent parasitic blade movement.

Assembly element	Description	Options
Insulators	Support and operating insulators provide mechanical support and electrical strength	Porcelain / polymer; bushing-type for rear connection
Contact system	Copper finger contacts and vertical-break blade with spring-loaded pressure	Silver/nickel plating of contact surfaces
Drive	Kinematics with fixed positions and mechanical interlocks	Manual / motor drive; left/right
Earthing switch (RVRZ)	Earthing bar on a rotary shaft, finger contacts on the lower shelves of fixed contacts	One or two; on moving-/fixed-contact side

Safety and interlocks

Personnel safety is ensured by a set of measures: mechanical interlocks prevent closing the earthing switch with the main blades closed and, conversely, closing the main blades with the earthing switch closed; position latching prevents movement due to vibration; provisions are made for padlocks and key interlocks (as part of process interlocking schemes). On request, auxiliary position contacts can be provided for integration into protection and control (SCADA/automation) systems. Clear position indicators improve operational visibility, and the visible isolating gap simplifies work permitting. All operations are performed in accordance with work permits and operating instructions.

Versions and options

RVR - without earthing switch; RVRZ - with one or two earthing switches.
Single-pole versions (on a dedicated frame) and three-pole (on a common frame).
Earthing-switch location: on the moving-contact side or on the fixed-contact side.
Insulator type: porcelain, polymer; optional bushing-type for rear connection.
Drive type: manual lever; motor-gear with remote control.
Drive arrangement: left/right; independent earthing-switch drive.
Plating of current-carrying parts: anti-corrosion and wear-resistant (silver/nickel on contact surfaces).
Additional items: auxiliary contacts, limit switches, cam block contacts, brackets for position sensors.

Option	Purpose	Application
Motor drive	Remote and automated operation	KRU/KRUN with SCADA, bus sectioning
Two earthing switches	Flexible earthing of feeder/bus sections	Cubicles with two supply directions
Bushing-type insulators	Rear connection of buses and cables	Compact cabinets, non-standard layouts
Auxiliary contacts	Position signalling “Closed/Open/Earthed”	Integration into protection & control

Standards and conformity

Design and manufacture take into account international and regional standards applicable to indoor medium-voltage equipment:
- IEC 62271-102 “High-voltage switchgear and controlgear - AC disconnectors and earthing switches” (together with IEC 62271-1 - common requirements);
- IEC 62271-200 “AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV” (when installed within switchgear assemblies);
- EN/IEC 60721-3-3 (replaces GOST 15150 U3) and, where applicable, EN/IEC 60721-3-4 (replaces GOST 15150 U1) for environmental conditions;
- IEC 60068 series for environmental testing.

Engaging partners and contractors

We invite manufacturers of switchgear, KRU/KSO integrators, design and contracting organizations, as well as investors interested in local assembly/manufacture of RVR disconnectors. We provide process support, adaptation of design documentation to your capabilities, and assistance with machining, electroplating, insulator production, and current-bar fabrication. For serial deliveries we prepare purchase specifications, in-process control cards, and test programs.

Documentation offered for production

The documentation package includes working drawings and part lists, 3D models of units and assemblies (Parasolid, STEP), flat DXF/DWG files for cutting, process sheets, bills of materials, assembly manuals, and operating instructions. On request, models for AutoCAD/SolidWorks are available, as well as data sheets for requirement alignment. Documentation can be promptly tailored to a specific project (cabinet dimensions, center-to-center distances, drive orientation, interface connections, etc.).

Benefits of working with us:

- No need to keep highly qualified design staff - you receive a complete documentation set that can be handled by a mid-level engineer.
- No need to manufacture prototypes - our experience allows launching serial production successfully.
- Working to our documentation, your specialists will receive consulting on all nuances of manufacturing the RVR-10 disconnectors.