E&I CONSTRUCTION

The main points and Keywords to be discussed in this article are testing and commissioning of ac ups system. ups system electricala. Inverter. Static transfer switch overload test. Inverter overload test.

TOOLS AND EQUIPMENT TESTING AND COMMISSIONING OF ELECTRICAL EQUIPMENT

Tools and equipment should be in good condition for use in the construction area. All test equipment required to be calibrated not more than 3 months before the date of test. All equipment calibration “original” certificates should be presented at site.

These includes but not limited to the following:

• Common Hand Tools
• Digital Volt-ohm Meter
• 500/5000V MEGGER
• Current Tester (Multi-Amp or equal)
• Torque Wrench
• Ductor (Micro ohm Meter)
• Protective Relay Test Set
• Thermometer
• Oscilloscope
• Load Bank
• Manufacturer’s Instruction Manuals
• Personal Protective Equipments
• Timing Tester
• Hydrometer
• Relay testing set
• DLRO

PROCEDURES FOR TESTING AND COMMISSIONING OF AC UPS SYSTEM

GENERAL PREPARATORY WORKS

• COMPANY shall appoint qualified employees as their ‘competent persons’. Such persons shall be capable of working safely and shall be knowledgeable on the precautionary techniques, personnel protective equipment, shielding and insulating materials and tools.
• All permanent and consumable materials shall prepare prior to testing.
• Manpower, equipment, tools and other logistics shall be prepared and ready for installation.

• Prepare the workplace such as barricading the area and housekeeping.
• Review the AC/DC control schematic of the disconnect switch assembly. All connection diagram vendor and IFC drawing shall be available in the work area.

• Review all technical specifications, operating manuals and previous inspection data if appropriate.

• Electrically Hazardous Task Plan / Permit shall be completed and signed before any work proceeds.

AC UPS SYSTEM ELCTRICAL COMMISSIONING

Visual Inspection

• Compare equipment nameplate information data with actual operating conditions, drawings and specifications.
• Inspect the physical condition of all electrical and mechanical components for deterioration and missing, broken, or loose parts, etc. This includes the inspection of insulators, insulation materials, sign of overheating or electric sparks and door fastener functionality.
• Check for proper wiring and terminal connection are done.
• Check that all grounding is securely connected (including star neutral points).
• Check cleanliness of interior of cubicle, clean using manufactures approved method and material.

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The main keywords for this article are testing and commissioning of electrical equipment, ups test, commissioning and testing and commissioning of dc ups system. 

TOOLS AND EQUIPMENT TESTING AND COMMISSIONING OF ELECTRICAL EQUIPMENT

Tools and equipment should be in good condition for use in the construction area. All test equipment required to be calibrated not more than 3 months before the date of test. All equipment calibration “original” certificates should be presented at site.

These includes but not limited to the following:

• Common Hand Tools
• Digital Volt-ohm Meter
• 500/5000V MEGGER
• Current Tester (Multi-Amp or equal)
• Torque Wrench
• Ductor (Micro ohm Meter)
• Protective Relay Test Set
• Thermometer
• Oscilloscope
• Load Bank
• Manufacturer’s Instruction Manuals
• Personal Protective Equipments
• Timing Tester
• Hydrometer
• Relay testing set
• DLRO

PROCEDURES TESTING AND COMMISSIONING OF ELECTRICAL EQUIPMENT

GENERAL PREPARATORY WORKS

• COMPANY shall appoint qualified employees as their ‘competent persons’. Such persons shall be capable of working safely and shall be knowledgeable on the precautionary techniques, personnel protective equipment, shielding and insulating materials and tools.
• All permanent and consumable materials shall prepare prior to testing.
• Manpower, equipment, tools and other logistics shall be prepared and ready for installation.

• Prepare the workplace such as barricading the area and housekeeping.
• Review the AC/DC control schematic of the disconnect switch assembly. All connection diagram vendor and IFC drawing shall be available in the work area.

• Review all technical specifications, operating manuals and previous inspection data if appropriate.

• Electrically Hazardous Task Plan / Permit shall be completed and signed before any work proceeds.

DC UPS SYSTEM

Visual Inspection

Compare equipment nameplate information data with actual operating conditions, drawings and specifications.

Inspect the physical condition of all electrical and mechanical components for deterioration and missing, broken, or loose parts, etc. Complete visual inspection of the battery system as follows.

• Broken or missing flame arresters and caps.
• Sediment in the bottom of batteries.
• Cracked, swelled, or damaged battery cases.
• Abnormal battery plate appearance.
• Visible corrosion on battery terminals or battery rack.
• Normal excessive ambient temperature in battery room.
• Normal excessive ambient humidity in battery room.
• Normal excessive dust or dirt in battery room.
• Wet floor around batteries and electrolyte on tops of batteries.

Inspect for battery and racks are properly installed.

Check for proper battery terminal and grounding connection are done.

Tighten main current carrying part (terminal connection, etc.) to the manufacture torque specification. If such information is not available, tighten in accordance with SA-P-000 page 4. Ductor test may also be used to confirm proper connection after initial torque test has been completed.

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This procedure describes the methods and requirements in the start-up and commissioning of the Rectifier / Charger System of UPS. The main keywords for this article are battery charger, rectifier, Battery charger test procedure,  Load Test Rectifier, Load Test charger.

GENERAL REQUIREMENTS

✓ Each item should be checked in accordance with the requirements in specification, drawings and manufacturer’s instruction and technical data as required to verify completeness of installation.
✓ All necessary verification activities for the equipment should be completed before implementation of start-up and commissioning.

SAFETY PRECAUTIONS

✓ Start-up and commissioning must be carried out by a qualified engineer, trained by the manufacturer or one of its agents. Failure to observe this will invalidate any future claims.
✓ The rectifier/ charger will contain potentially lethal voltages at all times once power is applied from the main distribution panel. Safety tagging and clearance procedure should be utilized in the start-up and commissioning.
✓ Clear the area of all unauthorized personnel and install barricades if possible to restrict entry of unauthorized persons.
✓ Tag the power disconnect switches on the distribution panel board which supplies power to the rectifier/ charger before working on the equipment.

Test Equipment & Tools Rectifier / Charger System

✓ Digital Multimeter.
✓ Phase Sequence Meter.
✓ Temperature Measuring Equipment.
✓ Load bank.

What Inspection need to be done.

✓ Inspect all wires and conductor insulation for damage.
✓ Inspect all wiring connections to the capacitor banks. Re-tighten if necessary.
✓ Check all terminal and breaker connections for tightness. Re-tighten if necessary.
✓ Remove and foreign objects from the components or the interior area of the unit. Make sure air passages are clear and free of debris. Re-tighten if necessary.
WARNING:
HAZARDOUS VOLTAGES ARE PRESENT IN THE EQUIPMENT THROUGHOUT THE MAJORITY OF THE START-UP PROCEDUR.
PROCEED WITH CAUTION.
✓ Carry out a thorough visual inspection of the equipment. Check the security of all cable terminations and ensure that all electrical connectors, plugs and sockets are correctly located and firmly fitted.

START- UP:  CAUTION!!!!
It is assumed that the installation is complete, the system has been personalized and set-up accordingly.

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