New VCB Supply
VCB selection and supply against system voltage, rated current, fault level, control voltage and approved project requirements.
Discuss Scope →
Breaker Suitability Depends on the Complete Switchgear Interface
VCB Solutions Defined by Rating, Mechanism and Panel Compatibility
Synergeze reviews system voltage, rated current, fault duty, operating mechanism, control supply, racking, interlocks, bus interface and protection before supply, retrofit or service.
VCB
Supply • Retrofit • Service • Testing
11 kV & 33 kV Systems
Selected 12 kV and 36 kV-class equipment
Supply & Integration
Project-specific VCB and panel scope
Retrofit & Servicing
Subject to compatibility and spares
Testing & Documentation
CRM, IR, timing and functional checks
Vacuum Interruption Technology
Medium-Voltage Interruption Is Only One Part of VCB Suitability
A vacuum interrupter provides the switching medium, but reliable application also depends on breaker duty, mechanism condition, control circuits, racking, shutters, interlocks and protection coordination.
For replacement or retrofit, physical dimensions and interfaces are as important as electrical ratings. Existing drawings, nameplates, panel photographs and operating history reduce compatibility risk.
Selection is project-specific
Ratings, dimensions, construction, interlocks and performance values vary by make and model. Final suitability is confirmed against the approved technical inputs and equipment documentation.
Select the Scope from Evidence
Supply, Retrofit or Service Based on Existing-System Findings
The required path is determined after comparing ratings, condition, spares, mechanism, panel interfaces, shutdown window and test observations.
Panel Integration
Integration with metal-clad switchgear, protection relays, CTs, PTs, metering, control wiring and interlocking.
Discuss Scope →Retrofit & Replacement
Replacement planning for selected existing breakers, subject to dimensions, ratings, busbar interface, racking and control compatibility.
Discuss Scope →Repair & Mechanism Servicing
Inspection and servicing of operating mechanism, coils, auxiliary contacts, interlocks, racking and control circuits.
Discuss Scope →Testing & Diagnostics
Contact resistance, insulation resistance, operating timing, sequence, control-circuit and functional checks.
Discuss Scope →Commissioning & Documentation
Functional verification, protection interface checks, recommissioning support and service or test documentation as agreed.
Discuss Scope →
System Voltage & Equipment Class
11 kV System Applications
33 kV System Applications
VCB Solutions for 11 kV and 33 kV Systems
System voltage and equipment voltage class are related but not identical. The selected VCB and switchgear assembly must match the applicable system, insulation, fault-duty and project requirements.
Typically associated with selected 12 kV-class VCB equipment, subject to system insulation level, rated current, breaking capacity, panel construction and approved specification.
Typically associated with selected 36 kV-class equipment, subject to the approved switchgear arrangement, protection requirements, site conditions and manufacturer documentation.
Technical Selection Inputs
Typical VCB Ratings and Configuration Parameters
The values below are selection references, not blanket guaranteed ratings. Final parameters depend on the selected VCB make, model, switchgear design and approved project specification.
System application
11 kV or 33 kV industrial systems
Equipment voltage class
Selected 12 kV or 36 kV class
Rated current
Typical references: 630 A, 1250 A or 2000 A
Short-circuit duty
Selected against the calculated system fault level and approved short-circuit / short-time withstand duty
Construction
Fixed or draw-out, panel and make specific
Control voltage
24 V DC, 110 V DC or project-specific supply
Operating sequence & timing
Verified against selected manufacturer data and project duty
Degree of protection
As specified for enclosure construction and installation environment
Protection & metering
Relay, CT, PT, metering and trip scheme as approved
Applicable references
IEC 62271-100 and IEC 62271-200, using the current applicable edition specified for the project; applicable IS requirements subject to equipment documentation
Technical qualification
Opening time, break time, operating sequence, mechanical endurance, auxiliary contacts, internal-arc classification and enclosure IP rating are make/model and switchgear-design specific. They must be confirmed from the selected equipment documentation and agreed scope.
Construction & Safety
VCB Panel Construction and Safety Features
Available construction and safety features depend on the selected breaker, switchgear panel, accessibility requirements and approved project specification.
Metal-clad and compartmentalized switchgear construction where specified
Fixed or draw-out VCB arrangement
Horizontal isolation or project-specific racking arrangement
Integral earthing switch where included in the approved design
Mechanical and electrical interlocking
Single or double busbar configuration where required
Protection relay and instrument compartment
CT, PT, metering and indication integration
Shutters, racking and service-position safety checks
Cable, busbar and control-interface coordination
VCB Testing & Diagnostics
Measurements Interpreted with Mechanism and Operating History
Contact resistance, insulation, timing and functional results are reviewed together with breaker condition and manufacturer guidance to identify meaningful corrective action.
Contact resistance measurement using suitable DC test current
Insulation resistance testing at the applicable test voltage
Opening and closing timing measurement
Close-open and operating-sequence verification
Closing coil and tripping coil circuit checks
Auxiliary-contact condition and sequence checks
Racking, shutters and interlock operation
Manual and electrical operation checks
Relay and trip-circuit functional verification
Secondary-injection coordination where included
Spring-charging motor and mechanism checks
Test observations and service report as agreed
Operation & Maintenance
Inspection, Mechanism Servicing and Recommissioning
The vacuum interrupter may require limited routine attention, but the complete breaker mechanism, racking system, coils, interlocks and control circuits still require condition-based inspection and maintenance.
01
Visual inspection and equipment condition assessment
02
Operating-mechanism cleaning and lubrication where applicable
03
Closing and tripping coil inspection
04
Spring-charging motor and limit-switch checks
05
Auxiliary contacts and control wiring inspection
06
Racking mechanism and interlock checks
07
Vacuum interrupter and contact-wear assessment as permitted by manufacturer procedure
08
Loose-connection, heating and insulation observations
09
Corrective recommendations and spare requirement identification
10
Recommissioning and operating checks after agreed work
Industrial Applications
VCB Solutions for Industrial and Infrastructure Systems
VCB selection and service scope are developed around the electrical distribution system, operating duty and site-specific requirements.
Automobile
Textile
Packaging
Bottling
Rubber & Plastic
Pharmaceutical
Food Processing
Chemical
Commercial Buildings
Hospitals
Infrastructure
Begin with Identification and Symptoms
Send Nameplate, Panel Photos, SLD and the Required VCB Scope
Include rated voltage/current, breaking capacity, make/model, control voltage, mechanism type, operating issue, test history and whether the requirement is supply, retrofit, service or commissioning.
Scope availability
Supply, retrofit, repair and servicing availability is subject to the selected VCB make, model, rating, equipment condition, dimensional compatibility, shutdown access and spare-parts availability.
