H.T SWITCHGEAR (VCB/LBS)

11kV & 33kV Medium Voltage Panels

Integrated Power & Engineering

Integrated Power & Engineering designs, manufactures, and supplies high-performance H.T Switchgear systems for 11kV and 33kV medium-voltage applications, ensuring safe power control, reliable fault protection, and long-term operational stability. Our switchgear solutions are engineered for industrial plants, commercial facilities, utility substations, and infrastructure projects, meeting both local utility requirements and international standards.

Built with robust panel construction, advanced insulation design, and dependable switching mechanisms, our VCB and LBS switchgear delivers consistent performance under high fault levels, frequent switching operations, and challenging environmental conditions.

Product Overview

H.T Switchgear is a critical component in medium-voltage power systems, responsible for switching, isolating, protecting, and controlling electrical feeders and transformers. A properly designed switchgear system ensures:

  • Safe interruption of fault currents
  • Protection of transformers, cables, and connected loads
  • Operational flexibility and system reliability
  • Personnel safety through interlocks and isolation

Integrated Power & Engineering offers custom-engineered 11kV and 33kV switchgear lineups, suitable for both new substations and system expansion or retrofit projects.

Technical Specifications

Voltage Class

  • 11kV
  • 33kV
  • Custom voltage classes available as per project requirements

Switchgear Type

  • VCB (Vacuum Circuit Breaker) Panels
  • LBS (Load Break Switch) Panels / RMU Solutions

Rated Current

  • VCB Panels: Up to 2500A
  • LBS / RMU Panels: Up to 630A

Short-Circuit Rating

  • VCB Breaking Capacity: Up to 40kA
  • Short-time withstand rating: As per system fault level and protection study

Operating Mechanism

  • Manual operation
  • Motorized operation
  • Fully automated / SCADA-ready (optional)

Insulation & Construction

  • Air-insulated metal-clad construction
  • High-quality insulation materials suitable for MV operation
  • Internal arc and safety-focused design (project-based)

Standards Compliance

Manufactured in accordance with:

  • IEC Standards
  • ANSI Standards
  • IS Standards
  • Utility and project-specific technical specifications

Standard Panel Configuration

A typical 11kV / 33kV switchgear lineup may include:

Incoming Panel

  • Receives supply from utility or upstream source
  • Provides main isolation and protection
  • Supports metering and protection relay integration

Transformer Feeder Panel

  • Dedicated switching and protection for power transformers
  • Designed according to transformer rating and fault level
  • Enables safe isolation during maintenance

Outgoing Feeder Panel(s)

  • Distributes power to downstream loads
  • Supports protection coordination to limit fault impact
  • Expandable for future load growth

Bus Coupler Panel (VCB)

  • Connects two bus sections
  • Improves reliability and operational flexibility
  • Allows maintenance without complete shutdown

Key Features & Performance Advantages

1. Reliable Fault Interruption

VCB panels provide fast and effective fault clearing, protecting transformers, cables, switchboards, and connected equipment.

2. Robust Mechanical & Electrical Design

Panels are built to operate reliably under:

  • High ambient temperature
  • High humidity and dust
  • Continuous duty and frequent switching

3. Modular & Compact Construction

  • Space-efficient layout
  • Easy installation and maintenance access
  • Simple expansion for additional feeders

4. Enhanced Operational Safety

  • Mechanical and electrical interlocks
  • Clear breaker position indication
  • Protection relay and alarm interface support

5. Low Maintenance Operation

VCB technology eliminates oil and SF₆ gas, resulting in:

  • Reduced maintenance requirements
  • High mechanical endurance
  • Lower lifecycle cost

Switchgear Type Description

Vacuum Circuit Breaker (VCB) Switchgear

Application: Incoming feeders, transformer feeders, outgoing feeders, and bus couplers requiring high fault interruption.

Typical Ratings

  • Voltage: 11kV / 33kV
  • Current: Up to 2500A
  • Breaking Capacity: Up to 40kA

Advantages

  • High fault interruption capability
  • Environment-friendly operation
  • Long service life with minimal maintenance

Load Break Switch (LBS) / RMU Switchgear

Application: Distribution networks and ring main units for normal load switching.

Typical Ratings

  • Voltage: 11kV to 33kV
  • Current: Up to 630A

Advantages

  • Compact footprint
  • Reliable load switching
  • Ideal for urban distribution and RMU systems

Applications

  • Utility substations (11kV / 33kV)
  • Industrial plants and manufacturing facilities
  • Commercial and real estate developments
  • Hospitals, airports, and data centers
  • Renewable energy grid integration (solar/wind)
  • Infrastructure and public service projects

Why Choose Integrated Power & Engineering?

  • Complete VCB & LBS switchgear solutions
  • Custom design based on SLD and protection philosophy
  • IEC / ANSI / IS compliant manufacturing
  • High safety standards with reliable interlocking
  • Modular panels for future expansion
  • Strong local engineering and after-sales support
What is the difference between VCB and LBS switchgear? +
A VCB (Vacuum Circuit Breaker) is used for fault interruption and protection, capable of breaking high short-circuit currents, while an LBS (Load Break Switch) is designed for normal load switching only and cannot interrupt fault current without upstream protection.
When should VCB panels be used instead of LBS panels? +
VCB panels are recommended for incoming feeders, transformer feeders, outgoing feeders, and bus couplers where short-circuit protection is required, whereas LBS panels are suitable for distribution switching and RMU applications under normal operating conditions.
What short-circuit levels can your 11kV and 33kV VCB panels handle? +
Our VCB panels can be designed with interrupting capacities of up to 40kA, with short-time withstand ratings selected based on system fault level and protection coordination studies.
What rated current options are available for HT switchgear panels? +
VCB panels are typically available up to 2500A, while LBS/RMU panels are generally rated up to 630A, depending on feeder duty and network design.
Are your switchgear panels suitable for SCADA and remote operation? +
Yes, our switchgear can be supplied with motorized mechanisms, auxiliary contacts, protection relays, and communication interfaces, making them fully compatible with SCADA and remote monitoring systems when required.
What safety interlocks are provided in the switchgear? +
Panels are equipped with mechanical and electrical interlocking to prevent unsafe operations such as closing the breaker when the earthing switch is ON or accessing cable compartments while energized.
How does VCB technology reduce maintenance compared to oil or SF₆ breakers? +
VCBs operate in a vacuum medium, eliminating oil handling or gas leakage issues, resulting in higher mechanical endurance, cleaner operation, and significantly lower maintenance costs over the equipment lifecycle.
Can the switchgear lineup be expanded in the future? +
Yes, the panels are designed with a modular construction, allowing easy addition of outgoing feeders or bus extensions without major modifications to the existing lineup.
What type of protection relays can be integrated with the panels? +
The switchgear supports integration with numerical protection relays for overcurrent, earth fault, transformer protection, feeder protection, and custom schemes as per project requirements.
Are these panels suitable for Bangladesh’s environmental conditions? +
Yes, the panels are engineered for high humidity, elevated temperature, dust, and industrial environments, with robust enclosure design, quality insulation, and corrosion-resistant components.
What standards do your HT switchgear panels comply with? +
Our switchgear is designed and manufactured in alignment with IEC, ANSI, and IS standards, as well as local utility and project-specific technical requirements.
Can Integrated Power & Engineering provide a complete substation solution? +
Absolutely. We offer end-to-end HT switchgear solutions, including design support from SLD, protection coordination, panel manufacturing, testing, installation guidance, and commissioning assistance.

Phone: +880 1713117974, +880 1717180660
E-mail: info@substationequipments.com, faruqipe36@gmail.com.com
Address: 165/7 West Rajashion, Birulia Road, Savar, Dhaka, Bangladesh.

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