Manufacturer of Isolators / Stockiest of Over Head Line Materials / Govt Contractors.
Motor Operated Isolator Boxes (also called motor drive operating boxes or isolator operating mechanism boxes) are specialized enclosures that integrate an electric motor to drive the isolator (disconnect switch) blades. With automation, precision, safety, and remote control features, they are ideal for modern high-voltage and industrial power systems.
These boxes are crucial in substations, railways, industrial power plants, and other settings where safe isolation of circuits is required without relying solely on manual operation.
Balaji Engineers has one of the most advanced setups for isolator panel box manufacturing located in MIDC, Kolhapur, Maharashtra, India. The facility is equipped with modern fabrication and testing infrastructure, enabling the company to deliver high-precision isolator operating boxes for substation and industrial applications.
A qualified technical team ensures accurate wiring and fitting of electro-mechanical components inside each box, maintaining superior build quality and operational reliability. Only reputed brands of motors, wires, connectors, and gear assemblies are used, each rigorously inspected and tested before installation.
Our fabrication division is supported by state-of-the-art machinery, including CNC press brakes, advanced welding stations, and precision sheet-metal processing equipment. Depending on client or utility specifications, box enclosures are manufactured using aluminium sheets or mild steel (MS) with powder coating, ensuring excellent corrosion resistance and durability.
Balaji Engineers manufactures a comprehensive range of isolator boxes to meet diverse requirements -
Manual Type Isolator Boxes
Manual Reduction Gear Type Boxes
Motor-Operated Gear Drive Type Boxes
Each isolator box is equipped with auxiliary switches from reputed brands, ensuring smooth and dependable performance.
All boxes undergo stringent in-house testing at our dedicated laboratory before dispatch, ensuring compliance with electrical, mechanical, and safety standards.
In addition to serving the Indian market, Balaji Engineers proudly exports isolator operating boxes and mechanisms to several countries across the globe, establishing its reputation as a trusted international supplier of isolator operating systems known for quality, precision, and reliability.
Key Features & Advantages -
Here are the main advantages and features of motor operated isolator boxes
The motor drive mechanism ensures smooth, controlled opening/closing of isolator contacts, reducing mechanical shock and wear.
Suitable for high voltage and current levels, making them fit for distribution, transmission substations, and heavy industrial use (power plants, oil & gas, renewables).
Many designs support remote command and feedback (open/close status, alarms, fault signals), which is vital for safe and efficient operations from control centers.
Boxes are commonly manufactured in Aluminium, Stainless Steel (SS), or MS (Mild Steel) powder-coated for environmental protection.
Contact arrangements such as 4 NO + 4 NC, 6 NO + 6 NC, 8 NO + 8 NC, 10 NO + 10 NC, etc.
Standard control voltages include 110 V DC, 220 V DC.
Use of 3-phase induction motors (415 V) for optimum torque-speed characteristics; or DC motors for specific setups.
Incorporation of interlocks, indication lamps, alarms, fault detection circuits to enhance safety and reliability.
These features make motor operated isolator boxes a key component in intelligent substations and modern grid automation.
| Parameter | Typical Range / Options |
|---|---|
| Rated System Voltages | 11 kV, 22 kV, 25 kV, 33 kV, 66 kV, 110 kV, 132 kV, 220 kV |
| Contact Configurations | 4 NO / 4 NC, 6 NO / 6 NC, 8 NO / 8 NC, 10 NO / 10 NC |
| Control (Operating) Voltage | 110 V DC, 220 V DC |
| Supply to Motor | 3-phase induction motor (415 V) or DC motor depending on design |
| Enclosure Material | Aluminium, Stainless Steel, or MS (powder coated) |
| Operating Mechanism | Gear reduction + motor coupling, limit switches, interlocks |
| Protection & Monitoring | Indicators, alarms, limit switches, feedback signals, remote controls |
| Standards & Certifications | Designed per electrical board specifications, compatible with isolator suppliers, tested per lab norms |
Our motor operated isolator boxes are designed with attention to mechanical strength, electrical insulation, and ease of maintenance -
1. Enclosure & Material Selection
The box enclosure is fabricated with corrosion-resistant materials (Al, SS, MS with quality powder coating). All housings are weatherproof and sealed as per site requirements.
2. Drive Mechanism
A robust gear reduction system couples the motor to the isolator shaft. Precision gears ensure minimal backlash and smooth mechanical transmission.
3. Motor & Control System
Use of 3-phase induction motors for balanced torque and steady performance.
DC motors (110 / 220 V DC) in select models.
Magnetic contactor starters, fuses, overcurrent protection, and auxiliary circuits.
Control panel inside the box with push buttons (Open / Close), indicator lamps, and alarm circuit.
4. Interlocks & Safety
Mechanical / electrical interlocks to avoid unsafe transitions.
Limit switches to detect fully open / fully closed positions.
Feedback contacts for SCADA or remote monitoring.
Provision for manual override in emergencies.
5. Wiring & Terminals
Proper size copper conductor, insulated wiring, organized terminals labeled clearly for external connections.
1. Mounting
Fix the motor operated box firmly on the structure adjacent to the isolator per manufacturer’s layout. Ensure alignment between the box and isolator shaft.
2. Electrical Wiring
Connect power supply to motor starter, supply control voltage, interlock circuits, and feedback loops as per wiring diagram.
3. Functional Testing
Validate open/close functions, proper direction of rotation.
Check interlocks, limit switch operation.
Simulate remote signals.
4. Calibration & Adjustment
Fine-tune mechanical linkage, align torque, ensure no binding.
5. Handover & Training
Provide operation & maintenance manual, train the technician on safe working practices, emergency override, and fault diagnosis.
To ensure reliable operation over the years -
1. Periodic Inspection
Check mechanical parts, bolts & fasteners, integrity of seals, lubrication of gears.
2. Lubrication
Use recommended grease for gearboxes; maintain schedule so movement remains smooth.
3. Electrical Testing
Inspect wiring, insulation resistance, contactors, fuses, relay systems periodically.
4. Fault Troubleshooting
Motor not running: check supply, starters, wiring, motor health..
Excess noise: check for mechanical misalignment or broken/loosened parts.
Indicator or feedback failure: check sensors, contacts, wiring.
5. Emergency Manual Operation
In case of motor or control failure, override mechanisms allow manual operation (gear or handle) to isolate the circuit.
Motor operated isolator boxes are widely used in -
Because of their remote controllability, these boxes are fitting for SCADA / automation ecosystems and allow operators to isolate circuits safely from control rooms.
If you want to procure motor operated isolator boxes, please provide -
You can Enquire Now or fill the contact form. Our team will respond with datasheets, quotation, and lead times.
contact - +91 9822 373 222 / +91 9922 129 222
“motor operated isolator box”, “motor drive isolator operating box”, “isolator motor drive enclosure”, “motorized isolator mechanism”, “operating mechanism boxes for isolator”“Motor operated isolator box 33 kV”, “Motor operated isolator box 66 kV” 110kv Motor operated isolator box” “132kV Motor Isolator Box “ Motor operated Isolator box for 220kV Isolator”
