S D Engineering

Complet ACB Servicing 
Clsoding Mechnisam checking
Triping Mechnisam checking
Manual ON-OFF operation of ACB
Checking of rack in – out mechanism & locking in test /  position
Checking & cleaning of arc chutes, main contacts & arcing contacts
Ect....

We are engaged in offering VCB Maintenance Service to our clients. Our range of all products is widely appreciated by our clients.

HT Panel Maintenance Service is a specialized service dedicated to ensuring the optimal performance, safety, and longevity of High Tension (HT) electrical panels. HT panels are critical components in electrical distribution systems, handling high voltage power supply in various industrial, commercial, and institutional settings. Our comprehensive maintenance service is designed to prevent downtime, enhance efficiency, and ensure compliance with safety standards. Here’s an overview of what our HT Panel Maintenance Service includes:

1. Visual Inspection

• External Inspection: Checks for any signs of physical damage, corrosion, or wear on the panel’s exterior.
• Internal Inspection: Examines the interior components for dust accumulation, moisture ingress, and any signs of electrical faults.

2. Cleaning and Lubrication

• Dust and Debris Removal: Ensures all parts are free from dust and debris that could cause overheating or electrical faults.
• Component Cleaning: Uses appropriate cleaning agents to clean contacts, insulators, and other critical parts.
• Lubrication: Applies lubrication to moving parts to ensure smooth operation and prevent wear and tear.

3. Electrical Testing

• Insulation Resistance Testing: Measures the insulation resistance to ensure there are no leakage currents that could cause short circuits.
• Contact Resistance Testing: Checks the resistance of electrical contacts to ensure they are making good connections.
• Thermographic Scanning: Uses infrared technology to detect hot spots that indicate potential problems such as loose connections or overloading.

4. Mechanical Checks

• Tightening Connections: Ensures all electrical connections are tight to prevent arcing and overheating.
• Checking Mechanical Operations: Verifies that all switches, breakers, and other mechanical components operate smoothly and correctly.
• Panel Door and Enclosure Inspection: Ensures that all doors and enclosures are secure and provide proper environmental protection.

5. Functional Testing

• Protection Relays Testing: Tests the operation of protection relays to ensure they trip correctly under fault conditions.
• Circuit Breaker Testing: Verifies the operation of circuit breakers, ensuring they trip at the correct settings and reset properly.
• Control System Testing: Checks the functionality of control systems and interlocks.

LT Panel Maintenance Service is dedicated to ensuring the optimal performance, safety, and longevity of Low Tension (LT) electrical panels. LT panels are essential components in electrical distribution systems, managing the supply of electricity to various devices and equipment in commercial, industrial, and residential settings. Our comprehensive maintenance service focuses on preventing downtime, enhancing efficiency, and ensuring compliance with safety standards. Below is an overview of what our LT Panel Maintenance Service includes:1. Visual InspectionExternal Inspection: Assess the panel for signs of physical damage, corrosion, and wear on the exterior.Internal Inspection: Check the internal components for dust, moisture, and signs of electrical faults.Component Verification: Ensure all components are securely mounted and properly labeled.2. Cleaning and LubricationDust and Debris Removal: Clean the panel and its components to prevent overheating and electrical faults.Component Cleaning: Use appropriate cleaning agents for contacts, insulators, and other critical parts.Lubrication: Lubricate moving parts to ensure smooth operation and reduce wear.3. Electrical TestingInsulation Resistance Testing: Measure insulation resistance to ensure no leakage currents that could cause short circuits.Contact Resistance Testing: Check the resistance of electrical contacts to ensure they are making good connections.Thermographic Scanning: Use infrared technology to detect hot spots indicating potential problems like loose connections or overloading.4. Mechanical ChecksTightening Connections: Ensure all electrical connections are tight to prevent arcing and overheating.Mechanical Operations Check: Verify that all switches, breakers, and other mechanical components operate smoothly.Panel Door and Enclosure Inspection: Ensure all doors and enclosures are secure and provide proper environmental protection.5. Functional TestingProtection Devices Testing: Test the operation of protection devices (circuit breakers, fuses) to ensure they trip correctly under fault conditions.Control System Testing: Check the functionality of control systems and interlocks.Backup Power Testing: Verify the operation of any backup power systems integrated with the LT panel.6. Calibration and SettingsInstrument Calibration: Calibrate meters, relays, and other instruments for accurate readings.Settings Verification: Ensure all settings (e.g., trip settings on breakers, relay settings) are correct and in accordance with design specifications.7. Documentation and ReportingMaintenance Log: Keep a detailed log of all maintenance activities, tests conducted, and any issues found.Report Generation: Provide a comprehensive report outlining the condition of the LT panel, any issues identified, and recommended corrective actions.Compliance Documentation: Ensure all maintenance activities comply with relevant safety and regulatory standards.

ACB Testing and Commissioning Service provides comprehensive solutions to ensure the optimal performance, safety, and reliability of Air Circuit Breakers (ACBs). ACBs are critical components in electrical distribution systems, used for protecting electrical circuits from overcurrent, short circuit, and other electrical faults. Our service includes thorough testing, precise calibration, and expert commissioning to guarantee that your ACBs operate flawlessly from the start. Here’s an overview of what our ACB Testing and Commissioning Service entails:

1. Pre-Commissioning Inspection

• Visual Inspection: Checks for physical damage, proper installation, and conformity with design specifications.
• Verification of Ratings: Ensures the ACB ratings match the system requirements (voltage, current, breaking capacity).
• Documentation Review: Reviews all relevant documents, including manufacturer’s instructions, wiring diagrams, and project specifications.

2. Mechanical Operation Testing

• Manual Operation Check: Verifies the manual operation of the ACB, ensuring smooth opening and closing mechanisms.
• Spring Charging Mechanism Test: Tests the spring charging mechanism for proper functionality.
• Interlock Functionality Check: Ensures all mechanical interlocks are working correctly to prevent unsafe operations.

3. Electrical Testing

• Insulation Resistance Testing: Measures insulation resistance to confirm the integrity of insulating materials.
• Contact Resistance Testing: Checks the resistance of the ACB contacts to ensure low resistance and good conductivity.
• High-Potential (Hi-Pot) Testing: Applies high voltage to the ACB to ensure it can withstand overvoltages without breakdown.

4. Protection Function Testing

• Overcurrent Protection Testing: Verifies the ACB’s ability to trip under overcurrent conditions, ensuring it operates within specified time-current characteristics.
• Short-Circuit Protection Testing: Confirms that the ACB trips correctly under short-circuit conditions.
• Earth Fault Protection Testing: Tests the ACB’s response to earth faults, ensuring proper tripping.
• Selective Coordination Testing: Ensures that the ACB coordinates correctly with upstream and downstream protective devices.

5. Functional Testing

• Trip Mechanism Verification: Tests the ACB’s trip mechanism to ensure it operates correctly under fault conditions.
• Closing and Tripping Operations: Verifies the electrical and mechanical closing and tripping operations under various scenarios.
• Control Circuit Testing: Ensures all control circuits, including remote control and signaling circuits, function as intended.

6. Calibration and Settings

• Relay and Trip Unit Calibration: Calibrates the protective relays and trip units to ensure accurate protection settings.
• Setting Verification: Verifies all settings (current, time delays) to ensure they are in accordance with design and protection coordination studies.

Bus Duct Maintenance Service is a specialized service designed to ensure the reliability, safety, and efficiency of bus duct systems used in electrical power distribution. Bus ducts, also known as busways, are used to transfer large amounts of electrical power in industrial, commercial, and institutional settings. Proper maintenance of bus ducts is crucial to prevent power outages, reduce electrical faults, and extend the lifespan of the system. Our comprehensive maintenance service focuses on preventive and corrective actions to keep your bus duct system operating at peak performance. Below is an overview of what our Bus Duct Maintenance Service includes:

1. Visual Inspection

• External Inspection: Assess the condition of bus duct enclosures for signs of physical damage, corrosion, and wear.
• Internal Inspection: Check internal components, including bus bars and insulation, for dust, debris, and signs of electrical faults.
• Connections and Supports: Ensure all connections are secure and supports are intact.

2. Cleaning and Lubrication

• Dust and Debris Removal: Clean bus ducts and associated components to prevent overheating and electrical faults.
• Component Cleaning: Use appropriate cleaning agents for contacts, insulators, and other critical parts.
• Lubrication: Lubricate moving parts, such as expansion joints, to ensure smooth operation and reduce wear.

3. Electrical Testing

• Insulation Resistance Testing: Measure insulation resistance to confirm the integrity of insulating materials and prevent leakage currents.
• Contact Resistance Testing: Check the resistance of bus bar connections to ensure they are making good connections with minimal resistance.
• Thermographic Scanning: Use infrared technology to detect hot spots indicating potential problems such as loose connections, overloading, or faulty insulation.

4. Mechanical Checks

• Tightening Connections: Ensure all electrical connections are tight to prevent arcing and overheating.
• Mechanical Operation Check: Verify that all expansion joints and support structures operate correctly and accommodate thermal expansion.
• Enclosure Integrity: Ensure that bus duct enclosures are properly sealed and provide adequate protection from environmental factors.