The Promoda Incoming Feeder Vacuum Circuit Breaker (VCB) Switchgear Panel is a metal-clad medium voltage feeder panel designed to control and protect incoming power supply lines in industrial substations, captive power plants, and utility distribution systems.
Serving as the primary interface between the upstream power source and the internal distribution network, this panel ensures safe incoming power control, fault isolation, and protection for downstream electrical equipment. The switchgear integrates a high-performance withdrawable vacuum circuit breaker capable of interrupting high fault currents and maintaining stable switching performance under heavy electrical loads.
Designed with a fully compartmentalized metal-clad construction, the panel separates high-voltage components such as the circuit breaker, busbars, cable terminations, and control equipment into independent sections. This architecture improves operational safety and simplifies maintenance by preventing fault propagation across compartments.
The withdrawable breaker truck allows the circuit breaker to move safely between service, test, and isolated positions, enabling inspection and functional testing without disconnecting power cables. This significantly reduces maintenance downtime and improves operational efficiency in industrial environments.
Manufactured with precision sheet-metal fabrication, high-conductivity copper busbars, and maintenance-free vacuum interrupters, the panel is suitable for medium voltage systems ranging from 3.3 kV to 33 kV. The switchgear complies with IEC 62271-200 for metal-enclosed switchgear and IEC 62271-100 for circuit breakers, ensuring reliable and safe operation in critical power distribution systems.
Incoming feeder VCB panels are widely used in industrial substations, utility distribution networks, and infrastructure power systems where secure incoming power control and system protection are essential.
Key Highlights
Primary Incoming Power Control
Designed to manage and protect the incoming supply line of medium voltage substations.
High Fault Interruption Capability
Vacuum circuit breaker ensures reliable interruption of high fault currents.
Withdrawable Breaker Design
Breaker truck supports service, test, and isolated positions for safe inspection and maintenance.
Compartmentalized Metal-Clad Construction
Improves operational safety and electrical isolation.
IEC Standard Compliance
Manufactured according to IEC 62271-200 and IEC 62271-100 standards.
Reliable Industrial Operation
Engineered for continuous operation in demanding industrial power environments.
Panel Architecture
The incoming feeder switchgear panel incorporates a metal-clad compartmentalized architecture designed to improve safety and maintenance accessibility.
- Circuit Breaker Compartment
Contains the withdrawable vacuum circuit breaker mounted on a racking trolley. - Busbar Compartment
Houses insulated copper busbars responsible for distributing power to downstream feeders. - Cable Compartment
Provides termination space for incoming power cables. - Low Voltage Compartment
Contains protection relays, meters, control wiring, and auxiliary control equipment.
Major Components
- Vacuum Circuit Breaker
Provides reliable interruption of incoming power faults. - Withdrawable Breaker Truck
Allows movement between service, test, and isolated positions. - Copper Busbar System
Ensures efficient power transfer to downstream distribution panels. - Automatic Safety Shutters
Isolate energized contacts when the breaker is withdrawn. - Interlocking Mechanism
Prevents unsafe switching operations.
Materials and Finish
- Heavy-gauge sheet-steel enclosure
- Powder-coated corrosion resistant finish
- Silver-plated electrical contacts
- High-grade insulation materials
| 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 |
Safety and Operational Reliability
- Fully metal-clad switchgear enclosure providing complete compartmentalization
- Automatic metallic shutters isolating energized contacts when the breaker is withdrawn
- Mechanical and electrical interlocking preventing incorrect switching operations
- Internal arc classification for enhanced operator protection
- Separate compartments for breaker, busbars, cables, and control circuits
Vacuum Switching Technology
- Maintenance-free vacuum interrupters
- High electrical endurance and switching reliability
- Stable arc interruption under heavy fault conditions
- Minimal contact erosion and long service life
- Suitable for industrial and utility power systems
Design Advantages
- Withdrawable breaker truck enabling safe inspection and servicing
- Front access for normal operation and maintenance
- Expandable switchgear lineup for future distribution expansion
- Modular switchgear construction for easy integration
- Optimized layout for improved insulation and heat dissipation
Compared to SF₆ Gas Switchgear
- No greenhouse gas emissions
- Eliminates gas leakage monitoring
- Lower environmental impact
- Reduced maintenance requirements
Compared to Oil Circuit Breakers
- No oil leakage or fire hazard
- Higher switching reliability
- Reduced maintenance intervals
- Longer service life
Compared to Fixed Breaker Panels
- Withdrawable breaker simplifies inspection and testing
- Testing possible without disconnecting cables
- Reduced downtime during service operations
- Improved operational safety
Key Industry Sectors
- Industrial manufacturing plants
- Power generation and distribution utilities
- Oil and petrochemical industries
- Steel and heavy engineering facilities
- Infrastructure electrical substations
Common Installations
- Industrial incoming power distribution panels
- Captive power plant substations
- Utility distribution substations
- Main feeder switchgear panels
- Transformer incoming protection panels
