Manufacturer of Isolators / Stockiest of Over Head Line Materials / Govt Contractors.
A Success Story of Engineering Precision, Reliability, and Trust
In a major step toward modernizing power infrastructure, JSW Steels Ltd, one of India’s largest integrated steel producers, initiated a critical project for retrofitting existing 33kV 3150 Amp isolators with a new, proven design isolator system. The objective was to enhance operational reliability, ensure seamless power transmission, and achieve higher efficiency in substation operations.
After a nationwide search for a reliable and technically competent manufacturer, JSW Steels floated a tender inquiry through SAP Ariba, inviting proven isolator manufacturers across India to participate.
Following a detailed technical evaluation process and multiple rounds of discussions between JSW Steels' technical team and Mr. Suhas Bhandari, Director of Balaji Engineers Isolators Pvt. Ltd., JSW selected Balaji Isolators as their trusted partner for this challenging retrofit task.
The decision was based on Balaji’s -
Post order confirmation, the Balaji Isolators engineering team carried out a comprehensive on-site study of the existing isolator structure at JSW Steels.
The objective was to analyze the -
Based on this assessment, Balaji Engineers developed an enhanced retrofit design tailored to perfectly match JSW’s site configuration while upgrading mechanical strength and electrical performance.
Every isolator was manufactured under strict quality control and individually tested at Balaji’s in-house testing facility to ensure compliance with IS and IEC standards.
With close coordination between JSW Steels’ technical team and Balaji’s engineering department, a detailed shutdown plan was finalized to ensure smooth installation with minimum downtime.
A team of skilled technicians from Balaji Isolators executed the critical retrofitting operation under the supervision of JSW’s senior engineers. Despite the complexity of replacing isolators within an existing live setup, the entire job was completed successfully within the scheduled timeframe.
Upon installation, the isolators underwent a complete testing and trial sequence, including -
All parameters met the required technical specifications flawlessly. The JSW Steels technical team highly appreciated the quality of Balaji Isolators, the precision in retrofitting execution, and the dedication of Balaji’s on-site team.
The successful completion of this project stands as a benchmark of engineering excellence. It reflects Balaji Isolators’ capability to
Deliver custom retrofit solutions for complex industrial environments.
Execute time-sensitive shutdown works with zero compromise on safety and quality.
Strengthen India’s power transmission and distribution network through innovative design and reliable performance.
Explore our full range of products and recent projects -
The 33kV 3150A isolator retrofitting project at JSW Steels Ltd is a testament to Balaji Isolators’ engineering capabilities, quality assurance, and client-centric approach. By combining innovation, precision, and timely execution, Balaji Isolators continues to be a preferred partner for leading industrial giants across India and abroad — powering the future with trust and technology.
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33kV Switch Disconnector Replacement
HV Isolator Upgrade at industry
Substation Equipment Modernization India
High Voltage Disconnect Switch Retrofitting
Power Substation Equipment Overhaul
Isolator Switch Retrofitting
Isolator retrofitting involves upgrading or replacing an existing isolator with a modern, reliable design while keeping the existing structure intact. It is necessary to
Enhance electrical and mechanical performance
Ensure safety and compliance with current standards
Reduce downtime and extend equipment life
Regular maintenance and overhauling of isolators are crucial to ensure reliable operation. Typically -
Visual inspection: Every 6 months
Mechanical & electrical checks: Annually
Full overhaul: Every 3–5 years, depending on operational load and environment
Balaji Isolators provides custom maintenance schedules and support for industrial clients.
Overhauling involves -
1. Disassembly of the isolator
2. Inspection of contacts, drive mechanism, and bushings
3. Replacement or refurbishing of worn parts
4. Cleaning and lubrication of all moving components
5. Reassembly and testing according to IS/IEC standards
This ensures safe and efficient operation of high-voltage isolators.
Yes, motorized isolators can be converted to manual operation in cases where -
Remote control is not required
Simplicity and reliability are prioritized
Cost or maintenance of motor drive is a concern
Balaji Isolators provides engineered solutions to safely replace motor isolators with manual variants without compromising performance.
During isolator replacement, it is important to ensure -
Proper alignment with busbars and mounting structures
Compliance with rated current and voltage levels
Mechanical and electrical clearances are maintained
Testing & commissioning under expert supervision
The duration depends on isolator type, voltage rating, and site conditions -
Planning & design approval: 2–4 weeks
Manufacturing & testing: 6–10 weeks
On-site installation & commissioning: 1–2 weeks (may vary for shutdown coordination)
Balaji Isolators ensures on-time execution while adhering to safety protocols.
Balaji Isolators offers -
Proven engineering expertise across 11kV–220kV isolators
Customized retrofit solutions for existing structures
Strict quality control and individual factory testing
Skilled technicians for critical on-site execution
Trusted by leading industrial clients like JSW Steels, AMNS Steels Ltd, Mahindra Ltd
