The Promoda 22 kV Vacuum Circuit Breaker (VCB) Switchgear Panel is a medium voltage power distribution solution engineered for sub-transmission networks, industrial substations, and large infrastructure power systems. Designed using a metal-clad air-insulated switchgear configuration, the panel ensures safe switching, fault isolation, and reliable operation in demanding electrical environments.
This switchgear integrates a withdrawable vacuum circuit breaker mechanism mounted on a racking trolley that allows safe movement between service, test, and isolated positions. This feature enables maintenance and testing activities to be performed without disturbing connected power cables, significantly improving operational safety and reducing downtime.
The 22 kV switchgear platform is widely used in industrial distribution networks and sub-transmission systems where higher voltage levels are required for efficient power transfer across large facilities or utility networks. The panel’s compartmentalized architecture separates high-voltage components such as busbars, breakers, and cable terminations into dedicated sections, minimizing the risk of internal faults and improving operator safety.
Constructed with robust sheet-steel enclosures, high-conductivity copper busbars, and maintenance-free vacuum interrupters, the switchgear delivers excellent electrical endurance and mechanical stability. Vacuum switching technology ensures rapid arc extinction, minimal contact erosion, and long service life even under frequent switching conditions.
The Promoda 22 kV VCB switchgear panel complies with IEC 62271-200 for metal-enclosed switchgear and IEC 62271-100 for circuit breakers, making it suitable for modern industrial and utility electrical installations that demand high reliability and operational safety.
Key Highlights
Optimized for Sub-Transmission Distribution
Designed for 22 kV industrial and utility power distribution networks.
Withdrawable Breaker Operation
Breaker truck allows safe movement between service, test, and isolated positions.
High Fault Interruption Capability
Engineered to handle high short-circuit currents in sub-transmission networks.
Metal-Clad Compartmentalized Design
Improves operator safety and minimizes fault propagation.
IEC Certified Engineering
Designed in accordance with IEC 62271-200 and IEC 62271-100 standards.
Long Electrical Service Life
Vacuum interrupter technology ensures minimal maintenance and consistent switching performance.
Panel Architecture
The switchgear panel uses a compartmentalized metal-clad architecture to improve operational safety and facilitate maintenance access.
- Circuit Breaker Compartment
Contains the withdrawable vacuum circuit breaker mounted on a racking trolley. - Busbar Compartment
Houses insulated copper busbars capable of handling high load currents. - Cable Compartment
Provides termination space for incoming and outgoing medium voltage cables. - Low Voltage Compartment
Includes protection relays, meters, control wiring, and auxiliary equipment.
Major Components
- Vacuum Circuit Breaker
High-performance interrupter designed for reliable fault current interruption. - Withdrawable Breaker Truck
Allows movement between service, test, and isolated positions. - Copper Busbar System
Ensures efficient current distribution and thermal stability. - Automatic Safety Shutters
Metal shutters automatically isolate live contacts when the breaker is withdrawn. - Interlocking Mechanism
Prevents incorrect switching sequences.
Materials and Finish
- Heavy-gauge sheet steel enclosure
- Powder-coated corrosion-resistant finish
- Silver-plated electrical contacts
- High-grade insulation materials for long-term reliability
| Parameter | Specification |
|---|---|
| Voltage Range | 3.3 kV – 33 kV |
| Rated Current | Up to 3150 A |
| Short Circuit Breaking Capacity | Up to 40 kA |
| Short Time Withstand Current | Up to 40 kA for 3 seconds |
| Circuit Breaker Type | Withdrawable Vacuum Circuit Breaker |
| Internal Arc Classification | AFL / AFLR as per IEC 62271-200 |
| Operating Mechanism | Stored Energy Spring Mechanism |
| Panel Construction | Metal-clad, compartmentalized switchgear |
| Ingress Protection | IP42 / IP54 |
| Panel Height | Approx. 2200 mm |
| Control Wiring | FRLS copper wiring, ferruled and numbered |
| Applicable Standards | IEC 62271-100, IEC 62271-200 |
Operational Safety and System Integrity
- Fully metal-clad enclosure separating all high-voltage components
- Automatic shutters isolating energized contacts during breaker withdrawal
- Mechanical and electrical interlocking preventing unsafe operations
- Internal arc classification available for enhanced safety
- Dedicated compartments for busbars, cables, and switching devices
Advanced Vacuum Switching Performance
- Maintenance-free vacuum interrupters
- High switching endurance for industrial applications
- Reliable arc quenching during fault interruption
- Minimal contact wear and longer service intervals
- Stable switching performance under heavy electrical loads
Flexible System Integration
- Withdrawable breaker mechanism simplifies inspection and servicing
- Front-operated panel design for easy operation
- Expandable switchgear lineup for future network expansion
- Standardized modular engineering compatible with system-house designs
- Optimized insulation layout for improved heat dissipation
Compared to SF₆ Gas Switchgear
- No greenhouse gas emissions
- No gas pressure monitoring required
- Lower environmental impact
- Simplified maintenance procedures
Compared to Oil Circuit Breakers
- No oil leakage or fire hazard
- Higher switching reliability
- Reduced maintenance requirements
- Longer operational life
Compared to Fixed Breaker Panels
- Withdrawable breaker simplifies inspection
- Testing possible without disconnecting cables
- Reduced maintenance downtime
- Improved operational safety
Key Industry Sectors
- Industrial manufacturing plants
- Oil, gas, and petrochemical industries
- Steel and heavy engineering facilities
- Utility power distribution networks
- Large infrastructure power systems
Common Installations
- Industrial sub-transmission substations
- Transformer feeder protection panels
- Captive power plant distribution systems
- Utility distribution switchgear rooms
- Medium voltage feeder switching panels
