procedure field inspection & testing electrical equipment

Procedure

Field Inspection and Testing Electrical Equipment

Document

Procedure Field Inspection and Testing Electrical Equipment

Table of Contents

Section Title Page

1.0 PURPOSE 2

2.0

CODE, STANDARD AND SPECIFICATION 2

3.0 3.1 3.2

SAFETY PROCEDURE General Procedures Electrical Equipment

222

4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.15

INSPECTION AND TESTS Purpose Transformer Switchgear and MCC Electric Motors Cables Grounding System Lighting Installation Electrical Monitoring SystemUPS / Battery Charger and BatteriesDiesel Engine GeneratorDistribution Panel Telecommunication SystemCathodic Protection System Heat Tracing System Miscellaneous

4445677788999101010

5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 5.14 5.15 5.16

6.0

TEST METHOD Insulation Resistance Test High Voltage Test Grounding Resistance Test Grounding Continuity Test Electrical Continuity Test Contact Resistance Measurement Power Transformer Polarity Test Dielectric Strength Test Current Transformer Test Voltage Transformer Test Interlock and Control Test Protective Relay Test Dielectric Absorption Test Lighting Circuit Test Electrical Distribution System Phase Rotation Check & Polarity Test Running Test of Motor Uncoupled

ACCEPTANCE CRITERIA ……………………………………………

1010111212131313141416161617171718

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1.0 PURPOSE

This specification covers the procedures for field inspection and pre-commissioning of electrical equipment and installations for Betara Complex Development Project.

2.0 CODE, STANDARD AND SPECIFICATION

The requirements contained in the latest editions of the following publications shall form a part of this specification in the manner and to the extent specified herein.

- Indonesian Law- Statutory Regulation- American National Standard Institute (ANSI)- American Petroleum Institute (API)- International Electro Technical Commission (IEC)- National Electrical Manufacturer’s Association (NEMA)- National Electrical Code (NEC) NFPA 70- PCI’s Specification:

- BCD03-01-00-46-CRT-001-1 (Electrical Design Criteria)- BCD03-01-00-46-SPC-013-1 (Specification Electrical Installation)

3.0 SAFETY PROCEDURE

3.1 General Procedures

1. Whenever inspection and tests are to be performed on electrical facilities, safety should be the primary consideration at all times. To assure the safety of testing and construction personnel, assume that:

(1) Any underground circuit is energized until tests show otherwise or until it is grounded.

(2) Wiring is incorrect.(3) Motors are connected to run in reverse.(4) Phases are different across a bus-tie breaker.(5) Everything needs checking.

2. Safety assurance during the testing of electrical systems cannot be overemphasized. Wherever possible, all power sources must be isolated by opening and withdrawing the breakers. Tag all breakers and padlock switches if necessary.

3. Unauthorized personnel must be kept away from test work. Rope off the area if necessary. Provide warning signs. Plan ahead and think before acting. One good way to avoid trouble is to write down the sequence before proceeding with a complex or hazardous inspection or test.

4. Use applicable personal protection equipment (PPE) when working on electrical equipment at any rated voltage.

3.2 Electrical Equipment

Here are mostly electrical equipments that we should take a concern to the safety since certain test equipment can cause painful, if not lethal, shocks. However, it does not mean we are not care to the other electrical equipment. The same safety procedures should be followed.



1. Transformers

a. Remember that certain test equipment such as megger and dielectric test sets can cause painful, if not lethal, shocks. Be careful when working with transformers; low voltages applied to the secondary windings can produce lethal voltages at the primary terminals.

b. Remember that open-circuit secondary windings of current transformers can produce extremely high voltages if their primaries are excited.

c. All secondary of current transformers should be short-circuited whenever their loads are removed. For example, the current transformer should be short-circuited when the ammeter is removed.

2. Switchgear and MCC

a. When working on any one circuit, be sure to positively identify the specific source breaker(s) and then lock it open and tag it. In the case of draw-out type gear, remove the breaker from its operating position. Make sure that personnel working on the equipment are familiar with the test procedures. Make sure they observe that the breaker is locked open.

b. Serious accidents may result due to improper switchgear operation. If switchgear cannot be mounted in a rack, or switched on, it must not be forced.

c. It should also be remembered that secondary- selective substations allow electrical power to be maintained at all plant loads, while individual system elements are de-energized for inspections or tests.

3. Cables

a. Establish that the circuit is dead by testing it with a high voltage detector (glow-stick), or in the case of low voltage use a voltage tester.

b. Make sure that the glow-stick, voltmeter, or voltage tester is in working order, by checking it against a live cable or test device both before and after the circuit check.

c. In addition to these tests, the source circuit breaker should be opened and tagged. Only after these precautions have been taken, the testing and checking of circuits can be started.

d. When a long cable is impressed with voltage and a megger is used during tests, the cable can still give a painful kick after the source is removed. Before allowing personnel to work on the cable, the cable must be discharged by connecting an insulated wire to earth.

4. Motors

a. Before any work is done on a motor, ensure that the motor　controller has been disconnected and tagged out. If possible, the motor feeder should be connected to earth.

b. If it is necessary to remove a motor for repair, always remember to reconnect the earth to the motor frame when reinstalling.



4.0 INSPECTION AND TESTS

4.1 Purpose

The inspection and tests described in this procedure shall be carried out at the appropriate time both during and after the installation or erection of the electrical facilities.At the beginning of the electrical inspection and tests, the check sheets (Appendix l) shall be filled in by the inspection engineer.

4.2 Transformer

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of transformers shall be filled in this check sheet.

4.2.1 Two-Winding Transformer (13.8/0.48kV)

Visual and Mechanical Inspection

1. The rating on the nameplate same with drawing and specification2. The design meets the area classification where the transformer is installed.3. The bushing seals are satisfactory.4. The oil level for main tank is correct and there is no leakage.5. The valves and pipe plugs are correct and tight.6. The cables and connections are correct and firm.7. The cable glands are tight.8. The cable gland mounting plate is suitable for magnetic flux.9. The terminal box seals are satisfactory.10. The bolting and gaskets are tight and satisfactory.11. The dehydrator of the breather is good.12. The pressure relief devices are correctly adjusted.13. Check the continuity of the tap setting switch.14. The bolting, clamping, etc. of the neutral connection is complete and firm.15. Check the continuity of the equipment grounding connection (tank and

marshalling kiosk should be connected to earth).16. The polarity of the terminals is correct.

Electrical Inspection Test

1. Measure the insulation resistance of high and low voltage winding2. Perform a high voltage test of the winding.3. Measure the dielectric strength of the insulation oil.4. Perform turns-ratio test at all tap positions.5. For transformer with OLTC (On Load Tap Changer), perform manual operation

through all tap position, driving motor rotation (Rise and Lower Position, set at centre axe before energizing), Upper and lower limit switch.

6. Alarm, tripped, control circuit, and auxiliary circuit.

4.2.2 Two-Winding Transformer (480/380-220V)

For two winding transformer 480/380-220V the same procedure as two-winding transformer 13.8/0.48kV should be performed.

4.2.3 Three-Winding Transformer (13.8/4.16/0.48kV and 13.8/0.48/0.48kV)

For three-winding transformer the same procedure as two winding transformer should be performed.



4.3 Switchgear and MCC

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of switchgear and MCC shall be filled in this check sheet.

1. 13.8kV and 4.16kV Switchgear and MCC


1. The rating on the nameplate and the switchboard layout is correct.2. No unauthorized modifications have been performed.3. The board assembly, bolting, and levelling are satisfactory.4. The bus-bar connections and supports, control bus bars, and neutral bar

connections are complete and tight.5. Contact resistance readings shall be taken for field assembled and complete

bus bar.6. The grounding bars and connections inside the board and equipment are

complete and tight.7. The safety features are satisfactory.8. The type and rating of the fuses in use are correct. The gage ring rating of the

plug cartridge fuse bases are correct.9. The type and rating of the circuit breakers are correct. The current setting and

tripping are correct.10. The contacts of the draw-out mechanisms are correctly aligned.11. The cable end bells (compounded type), glands, clamping, and termination are

in good condition.12. Test the anti-condensation heaters.13. The circuit wiring is correct. Including conformity with wiring diagram, correct

and sure connection to instrument and protective relays terminal, and the identifications of the conductor. The relays and measuring instruments are checked and tested. The rating and range are checked in accordance with setting data if the ratings of current and potential transformers are adequate. All blocking materials are removed. Adjust the relays and devices to the correct duty point per setting data.

14. The indicating and signalling lamps or devices operate correctly.15. The phase rotation and polarity of the electrical distribution system are correct.16. The accessories and special tools are correct.


1. Perform insulation resistance test 2. Perform ratio and polarity test on all current and voltage transformer3. Perform power frequency voltage test on main circuit4. Dielectric test on aux. and control circuit5. Perform interlock and control-wiring test consist in checking the proper

operation of all the electrical and electromechanical circuit, simulating the various working conditions of switchgear as closely as possible.

2. 0.48kV Switchgear and MCC


1. The rating on the nameplate and the switchboard layout is correct.2. No unauthorized modifications have been performed.3. Holding down arrangement and seat alignment correct.4. Ground bar and grounding correct and tight5. Phase identification is correct.



6. Instrument, indication lamps and interlocks correct.7. MCCB, Contactor, Fuses, Etc. correctly sized and identified as per Single Line

Diagram.8. Padlocking facilities correct.9. Ammeter and current transformer correctly installed.10. Check internal for cleanliness.11. Check manual operation of selector switch, MCB, push button, etc.12. Incoming cables correctly installed, terminated and supported.13. Unused cable entry sealed.14. All internal cabling and wiring neat, correct and undamaged. 15. Heater correctly installed.16. The relays and measuring instruments are checked and tested. The rating and

range are checked in accordance with setting data if the ratings of current and potential transformers are adequate. All blocking materials are removed. Adjust the relays and devices to the correct duty point per setting data


1. Perform dielectric withstand / dry insulation test.2. Perform insulation resistance test.3. Perform test of auxiliary and functionality. These functional tests consist of

checking the proper operation of all the electrical and electromechanical circuit, simulating the various working conditions of switchgear as closely as possible.

4.4 Electric Motors

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of electric motor shall be filled in this check sheet.


1. The rating on the nameplate is correct.2. The design meets the area classification.3. The shaft-blocking device is removed for transport.4. The coupling alignment and rotor endplay are satisfactory.5. Rotate the motor by hand.6. The bearings, grease packing, grade and quality of grease, oil level, and oil rings are in

good condition.7. The bolting and weatherproofing of the terminal box are complete and tight. The

terminal connections are correct and tight.8. Test the anti-condensation heater.9. The cable end bells and glands are completed and tightened.10. The equipment grounding is completed and tightened.11. The components of the cooling system are in good condition.12. The push-button station is correctly installed.13. The direction of rotation is correct.


1. Perform insulation resistance test.2. Verify that resistance temperature detector (RTD) circuits, if applicable, conform to

drawings.3. Verify that the motor space heater is functional.4. Run the motor uncoupled and check the bearings for overheating.5. Measure the voltage, amperage, and vibration during the uncoupled run.



4.5 Cables

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of cables shall be filled in this check sheet.


1. The cable trench is clean and free from any foreign objects.2. The size and installation are in accordance with the approved drawings.3. The cable tray is correctly and rigidly installed.4. The circuit indication and terminal numbering are correct and firm.5. The cable end bells, oil or compound levels are satisfactory and there is no leakage.6. The cable end seals are complete and tight.7. The cable glands are complete and tight.8. The cable is protected against mechanical damage.9. The underground cable joints are complete and meet the specifications.10. The grounding connections are completed.11. The cable terminations and connections are correct and tight.12. The cable route markers are correct.


1. Measure the insulation resistance.2. High-voltage test on cables (those rated at and above 4.16 kV)3. Check the electrical continuity and cross connection of the conductors for parallel

feeders.

4.6 Grounding System

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of grounding system shall be filled in this check sheet.


1. The grounding joints are complete and tight. The underground joints should be spot-checked before they are backfill.

2. The size of the cables and installation comply with the approved drawings.3. The installation of the electrodes is satisfactory.4. Check the protective measures that have been taken against mechanical damage to

the system.


1. Measure the grounding resistance of each electrode.2. Check the grounding continuity of the grounding system.3. Measure the grounding resistance of the grounding system.

4.7 Lighting System

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of lighting system shall be filled in this check sheet.




1. The enclosure for area classification.2. The numbers and location of the equipment are correct.3. The circuit numbers and load of the distribution panel are correct.4. The switch ratings and the fuse ratings are correct.5. The weatherproofing of the cable glands is satisfactory.6. The feeder cable size is correct.7. The equipment grounding is complete and tight.8. The operation and setting of the time switches, photoelectric cells, magnetic control

switches, etc. are satisfactory.9. The lighting circuit connection is correct for circuit numbering and identification.


1. Check the insulation resistance of each circuit.2. Measure the illumination level.3. Measure the voltage and phase at each socket.

4.8 Electrical Monitoring System (EMS)

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet (Hold), appendix-1. Check & inspection result, general information of electrical monitoring system shall be filled in this check sheet.


1. Check name plate and there is no damage and loss material / component as per vendor drawing.

2. Check component of system are correctly installed in the location.3. Check availability of power supply


1. Check system function and performance2. Detail item to be tested in accordance with vendor document for testing.

4.9 UPS / Battery Charger and Batteries

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of UPS / Battery Charger and Batteries shall be filled in this check sheet.


1. The rating on the nameplate of the charger is correct.2. The battery rating, voltage, and ampere-hours are correct.3. The connected loads agree with the approved drawings.4. The level of liquid in each cell is within the limit.5. The protective devices for the battery charger, i.e. fuses, relay etc., are correct.6. The cable connections are correct and tight.7. The equipment grounding is complete.8. The batteries are completely charged or voltage/cell within the limit




1. Verify correct AC input voltage2. Verify charger output voltage regulation from no load to full load3. Measure AC input current4. Verify instrumentation and alarms.

4.10Diesel Engine Generator

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of Diesel Engine Generator shall be filled in this check sheet.


1. The rating on the nameplate is correct.2. The board assembly, bolting, and levelling are satisfactory.3. The equipment grounding is complete.4. The interlock and control are correct.5. The phase rotation and polarity are correct.6. Measure the insulation resistance.7. Operation of the emergency power system equipment is satisfactory according with

manufacturer’s manuals.


1. Measure the insulation resistance2. Calculate polarization index3. Test protective relay device4. Conduct performance test in accordance with the specification. Detail item to be

tested refer to vendor document for testing.

4.11Distribution Panel (e.g. Lighting panel, Control Panel, etc)

The following general items shall be checked, inspected, and tested. Detail requirements for inspection and testing should refer to the check sheet, appendix-1. Check & inspection result, general information of Distribution Panel shall be filled in this check sheet.


1. The rating on the nameplate is correct.2. No damage and loss material / component as per drawing.3. The equipment grounding is complete.


1. Measure the insulation resistance2. Adjust the relay and devices, if applicable, to the correct duty point per the setting

data.

4.12Telecommunication Systems

The inspection and testing for the communication systems shall be carried out in accordance with the manufacturer’s recommended procedures and manuals.



4.13Cathodic Protection System

The installation of cathodic protection system shall be checked and tested in accordance with the manufacturer’s recommended procedures and manuals.

4.14Heat Tracing System

The installation of Heat Tracing System shall be checked and tested in accordance with the manufacturer’s recommended procedures and manuals.

4.15MiscellaneousFor the miscellaneous electrical equipment or installation that not specified on the above, the detail inspection and testing should refer to the check sheet on appendix-1.

5.0 TEST METHODS

5.1 Insulation Resistance Test

1. The Insulation resistance shall be measured using an appropriate insulation tester as shown in Figures 1 and 2.Confirm that conductors, windings and metal frame other than tested are securely grounded i.e. conductor screen, steel armour of cable, transformer frame, motor frame, etc.

Figure - 1 “MEASURING RESISTANCE BETWEEN CONDUCTOR AND EARTH”

2. Voltages supplied by megger shall be as:1. Circuits rated above 600V : 2500V2. Circuits rated at 600V and below : 500V3. Telephone system : 250V

3. Voltage shall be applied until the pointer remains steady. Insulation resistance of HV motor shall be measured after 15 sec., 30 sec., 1 min., 10 min. to calculated the polarization index.

4. Charged energy shall be discharged after a reading.

5. Complete an insulation resistance test data sheet for every test.

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Figure - 2“MEASURING RESISTANCE BETWEEN CONDUCTORS”

5.2 High Voltage Test (This test shall be carried out by Vendor recommendation).

This test shall be applied to switchgear, and cables.The switchgear shall be tested to disconnect from testing circuit of the inside equipment’s i.e. instrument voltage transformer, lightning arrester, surge absorber, and neutral grounding register.

1. Measure the insulation resistance.2. DC test equipment can be used in case of cables with big capacitance.3. When the insulation resistance measured is satisfactory, connect the high-voltage test

equipment as shown in Figure 3. 4. Increase the voltage gradually to the required value.5. Read the voltage and leakage current when the voltage steadies at the required

voltage.6. Maintain the voltage for the time.7. After timing up, decrease the voltage gradually to ZERO, cut off voltage and then

discharge any residual voltage.8. Measure the insulation resistance as before.9. Complete a high-voltage test data sheet for every test.

Figure - 3“HIGH – VOLTAGE TEST”

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5.3 Grounding Resistant Test

1. Grounding resistance shall be measured using an earth resistance tester, as shown in Figure 4.

2. Grounding resistance shall be measured at each electrode.

3. Complete an grounding resistance test data sheet for every test.

Figure - 4“MEASURING GROUNDING RESISTANCE”

5.4 Grounding Continuity Test

Before backfilling the grounding wiring, make a visual check of the underground connections. Measure the electrical continuity by use of a circuit tester, according to the following sequence:

1. Apply the circuit tester to all of the grounding electrodes, as shown in Figure 5 (1st step).

2. Apply the circuit tester between grounding electrode and the nearest connected equipment, as shown in Figure 5 (2nd step).

3. Apply the circuit tester between adjacent connected equipment, as shown in Figure 5 (3rd step).

4. Using the same procedure, check the resistance between all connected equipment and grounding electrodes.

5. Complete an grounding continuity test data sheet for every test.

Figure - 5“CHECKING GROUNDING CONTINUITY”

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5.5 Electrical Continuity Test

Measure electrical continuity by use of a circuit tester, according to the following procedure: If metal sheath is not provided, one of core to be used instead of metal sheath.1. Bond the conductor and metal sheath at one end of the cable with a wire clip, as shown

in Figure 6.2. Apply the circuit tester between the same conductor and metal sheath, as shown in the

figure.3. Using the same procedure, check the electrical continuity between all of the

conductors.4. Complete a cable test data sheet for every test.

Figure - 6“CHECKING ELECTRICAL CONTINUITY”

5.6 Contact Resistance Measurement

1. The test shall be applied to all bus bars bolted connection that are assembled at site and complete bus bar.

2. Resistance of the connected parts shall be measured by low- resistance test set.

5.7 Power Transformer Polarity Test (Vector Test)

The test shall be applied for power transformers in accordance with the following procedure:

1. Connect primary terminal "C" and secondary terminal "C", as shown in Figure 7.2. Connect a temporary test power source to the primary side of the transformer and

switch it on.

Figure - 7“TESTING POLARITY OF POWER TRANSFORMER”

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3. Measure the voltage between each terminal as follows: A – a V A – b V B – a V B – b V

5.8 Dielectric Strength Test

This test shall be applied to electrical insulation oil in accordance with applicable standard.Two samples shall be taken from the insulating oil. Each sample shall be tested according to the following procedure:

1. Make the connections as shown in Figure 8.

Figure - 8DIELECTRIC STRENGTH TEST

The testing vessel and electrodes shall be cleaned, dried, and then rinsed with a little of the insulating oil that is to be tested.

2. Take a sample of the insulating oil from the transformer, etc.Do not uncork the sample until its temperature equals the ambient temperature of the test area.

3. Maintain the ambient temperature during the test at 15-35 deg. C.4. Fill the testing vessel with the sample and wait approximately 3 minutes, until the oil

bubbles have disappeared.5. Increase the test voltage by 3kV per second until a breakdown occurs.6. Repeat the procedure five times while the sample is in the testing vessel and record the

results.7. Complete an insulation oil test data sheet for every test. The breakdown voltage of the insulating oil shall be determined by calculating the

arithmetical average of the five breakdown voltages recorded (the first breakdown voltages recorded are not used in the calculation).

5.9 Current Transformer Test

1. Polarity Check (Kick Test)

Each current transformer shall be individually tested to verify that the primary and secondary polarity markings are correct. A low voltage battery is used, via a single-pole push-button switch to energize the primary winding.When polarity are as shown below, on closing the push-button, the d.c. ammeter should give a positive flick and on opening, a negative flick.

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Figure - 9“TEST CIRCUIT”

2. Ratio Test (Primary Injection Test)

a. This check is usually carried out during the primary injection test. The circuit shall be as shown in figure 10.

b. Current is passed through the primary conductors and is measured on the test set ammeter (A1).

c. The secondary current is measured on the ammeter (A2) and the ratio of the reading on A1 to that on A2 should approximate to the ratio marked on the switchgear to be applied with Primary Injection Test.

d. Connect injection leads on the primary circuit of CT using primary junction device.e. Check the secondary terminals by a temporary wire.f. Confirm other CT secondary loop is complete, if not, short the CT secondary

terminals by a temporary wire.g. Inject the current as same value of CT primary (as possible) and confirm the CT

ratio measuring the CT’s secondary current.h. Record the test results and complete the test report.

Figure 10“MEASURE CT RATIO (PRIMARY INJECTION)”

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5.10Voltage Transformer Test

1. Polarity Check (Kick Test)

a. The voltage transformer polarity can be checked with the test described for the current transformers.

b. Care must be taken to connect the battery supply to the primary winding, with the polarity ammeter connected to the secondary winding.

5.11Interlocks and Control Test

With the switchgear control power energized, each circuit breaker position shall be checked, and then checked again in the operating position, according to the following procedure:

1. Close the circuit breaker and trip it from the control switch and remote control panel.2. Mechanically trip each electrically operated circuit breaker.3. Test the lockout device in the closing circuit for proper operation by simulating

conditions in which a lockout would occur.4. Complete a sequence test data sheet for every test.

5.12Protective Relay Test

1. Protective relay shall be tested in accordance with relay Manufacturer’s manual.2. Input current and/or voltage of the set tap value of protective relay and confirm the

relay to pick-up.3. Primary injection test shall be applied where necessary i.e. for bus-zone protection.

To understand the test procedure, refer to the following sample of the protective relay test.

5.12.1 Inverse - Time Relay Calibration and Test

1. Using a relay tester with a third harmonic filter, set the relay in accordance with the Relay Setting List.

2. Connect one relay unit to the relay tester.3. The minimum pickup current input to the relay and the calibration of the relay

shall be tested as follows:a. Rotate the armature disk by hand to the midpoint of its full travel. Mark a

red target line between the disk and a stationary part.b. Increase the input current to the set tap value and monitor the armature

disk to determine when it starts to rotate.c. If the disk does not start rotating at the set tap current, increase the current

slightly.d. Check that when the disk stops, the red lines coincide. If not, adjust the

tension in the spring accordingly.4. Operational Test.

a. Set the input current at 300% of the set tap value.b. Set the cycle counter and input the 300% current through the relay coil.

Measure the duration of operation.c. Repeat the procedure with a 600% tap current.

5. Complete the Relay Setting List for every item of test data.

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5.12.2 Instantaneous Relay Test

1. Set the relay in accordance with the Relay Setting List.2. Set the input current at the set tap value and confirm that there is current

between the relay and pickup.3. Complete the Relay Setting List for every item of test data.

5.13Dielectric Absorption Test

1. The procedure for this test shall be the same as that for the insulation resistance test.

2. For motors and generators rated below 1,100 kW, take readings at 30 and 60 second intervals to determine the dielectric absorption ratio.

3. For motors and generators of l,l00kW and larger, take readings at one minute and 10 minute intervals to determine the polarization index.

4. Calculate the ratios from the following formulas:1. Dielectric absorption ratio = 60 second reading 30 second reading

2. Polarization index = 10 minute reading 1 minute reading

5. Depending on the type of test, complete a dielectric absorption ratio data sheet or a polarization index data sheet, for every test.

5.14Lighting Circuit Test

After satisfactory insulation resistance values have been obtained, the lighting circuit shall be tested according to the following procedure:1. Turn off all the branch circuit switches in the lighting panel.2. Energize the distribution circuit up to the lighting panel.

3. Check the voltage between all phases, and between each phase and the neutral conductor, at the buses to the lighting panel.

4. Turn on one branch circuit switch and check that the illuminated lighting is in accordance with the lighting drawing.

5. Check all the branch circuits one by one, using the same procedure.

6. Complete a lighting circuit test data sheet and an illumination level data sheet for every test.

5.15Electrical Distribution System Phase Rotation Check and Polarity Test

1. Before energizing the electrical panel by permanent power, phase rotation and polarity shall be checked by using the temporary low voltage power.

2. Complete a phase rotation and polarity test data sheet for every test.

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5.16Running Test of Motor Uncoupled

All tests and inspections of the motor, such as visual inspections, insulation resistance measurements, and sequence checks, shall be completed before making a motor no-load run test. Other checks to be performed are as follows:1. Check that the motor can be easily turned over by hand.

2. Ensure that the coupling is correctly aligned and the motor is fixed to its foundation.

3. Using the starter, rotate each motor to check that it rotates in the direction indicated by the rotation arrow. If not, reverse the connection leads at the starter, or at the motor if necessary.

Run the motor uncoupled until the motor tempera-ture reaches the saturation point.

4. Check the vibration, noise, and bearing tempera-ture. Use a thermometer to check and record the bearing temperature. Do not try and determine the temperature by feeling the bearing housing. Defective bearings will be discovered by their being noisy or by their overheating.

5. Complete a motor uncoupled run test data sheet for every test.Note: Motors with special construction or fractional capacity shall be individually discussed and decided before the test.

6.0 ACCEPTANCE CRITERIA

This section defines the acceptance criteria of site test, which shall be used for evaluation of measured values. The acceptance value of each test item shall be referred to a list as follows:

No. Description of Test Test Equipment & Tolls Test Voltage & Duration

Min Acceptance Value

1 Grounding Resistance Measurement

Grounding Rod Lightning Earth Rod Ground. System Network Instrument Grounding

Ground. Resistance Tester Ground. Resistance Tester Ground. Resistance Tester Ground. Resistance Tester

Below 25 OhmBelow 10 OhmBelow 1 Ohm

2

2.1

2.2

2.3

2.4

Power Transformer

Insulation Resistance Test a) Control Circuit b) LV below 1KV c) HV above 1KV

Insulation Oil Test

Continuity Test a) Primary Winding b) Secondary Winding c) Neutral Grounding d) Equipment Grounding

Polarity Test

500V Megger1000V Megger2500V Megger

AC Dielectric Test set

Circuit TesterCircuit TesterCircuit TesterCircuit Tester

30KV

1M Ohm5M Ohm50M Ohm

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3

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

Switchgear & Controlgear and Panelboard

Insulation Resistance Test a) Control Circuit b) LV below 1KV c) HV above 1KV

Continuity Test a) Equipment earthing b) Power circuit c) Control circuit

Conductivity Test

HV Test (Apply HV above 1 KV) * 4.16KV

Polarity Test

Protective Relay Test(by Vendor SV)

Interlocks and Control / Sequence Check

Phase Rotation Check

Ratio Test

500V Megger500V/1000V Megger2500V Megger

Circuit Tester / BuzzerCircuit Tester / BuzzerCircuit Tester / Buzzer

Contact ResistanceMeasurement Tester (Ductor Tester)

AC Dielectric Test Set

Circuit Tester & Battery

Relay Test Set supplied by Vendor

Rotation Meter Primary Injection Test Set Ammeter

4.16KV x 1.5 (10 mnt)

1M Ohm5M Ohm50M Ohm

4

4.1

4.2

4.3

Cables

Insulation Resistance Test a) Control Cable b) LV Cable below 1KV c) HV Cable above 1KV

HV Test (Apply HV above 1 KV)From 1KV up to 15KV

Continuity Test

1000V Megger1000V Megger2500V Megger

Circuit Tester / Buzzer

10M Ohm10M Ohm

100M Ohm

Page 19 Updated – 07/04/2023




5

5.1

5.2

5.3

5.4

Electrical Motor

Insulation Resistance Test a) HV Motor b) LV Motor c) Space Heater

Vibration Test (Uncoupled)

Running Current (Uncoupled)

Temperature Rise a) Bearing b) Frame

2500V Megger500V/1000V Megger500V Megger

Vibration Meter

Clamp Multi Meter

Temp. IndicatorTemp. Indicator

50M Ohm5M Ohm1M Ohm

6

6.1

6.2

6.3

6.4

6.5

Lighting

Insulation Resistance Test

Circuit Continuity

Circuit Voltage Check

Function Test

Illumination Level Check

500V Megger


Circuit Tester

Lux Meter

1M Ohm

7

7.1

7.2

7.3

Power & Convenience Outlets

Insulation Resistance Test

Circuit Continuity

Polarity Test

500V Megger


Circuit Tester

5M Ohm

Page 20 Updated – 07/04/2023

procedure field inspection & testing electrical equipment

Documents

breakdown

manufacturers

cable end

procedure

min acceptance

correct duty

primary injection

resistance