City and County of San Francisco CONTRACT No. 9078.A
SFO - Data Center
SECTION 26 08 13
TESTING SPECIFICATIONS
PART 1 - GENERAL
A. The requirements of the contract, Division 1, and Division 16 apply to work in this section.
1.1 DESCRIPTION
A. Work included in this specification includes field testing and commissioning of listed electrical components, assemblies and apparatus that are included in this project.
1.2 SCOPE
A. Test and inspection procedures included in this specification are as follows:
1. Switchgear and Switchboard Assemblies
2. Circuit Breakers.
3. Substation Transformers (Dry Type)
4. Cables Medium Voltage
5. Low Voltage Circuit Breakers (480 VAC)
6. Low Voltage Molded Case Circuit Breakers above 250 Amps
7. Low Voltage Motor Control Centers
8. Instrument Transformers
9. Metering and Instrumentation
10. Grounding Systems
11. Thermal Overload Relays
12. Engine Generator System and Load Bank
B. Field engineering and appraisal report.
1.3 RELATED SECTIONS
A. Entire Division 26.
1.4 REFERENCES
A. IEEE, NEMA, UL and NETA standards and recommended practices.
1.5 SUBMITTALS
A. Equipment submittals shall include copies of the test sheets to be used during the field testing and commissioning.
1.6 PROJECT RECORD DOCUMENTS
A. An engineering appraisal report shall be provided at end of testing prior to acceptance and full energysation of equipment.
1.7 QUALITY ASSURANCE (QUALIFICATIONS)
A. Field tests on electrical equipment shall be performed by the manufacturer's authorized warranty engineering organization. Field engineers and technicians shall be factory trained on the equipment being tested. If third party testing is used an equipment manufacturer's authorized warranty representative shall be present during testing.
1.8 REGULATORY REQUIREMENTS
A. Standard construction site safety practices shall be followed. A safety meeting shall be held at the beginning of the project with all participating personnel present.
1.9 WARRANTY
A. Testing organization shall participate in warranty on equipment tested and shall be responsible for equipment tested that fails to perform do to failures in workmanship or materials but that is not covered by the manufacturer due to alleged incorrect testing practices.
1.10 PERFORMANCE REQUIREMENTS:
A. Wind Loads – Structural Design Basis:
1. Importance Factor – See Structural Design Basis (Sheet S0.1.1)
B. Seismic Design – Structural Design Basis
1. Importance Factor – See Structural Design Basis (Sheet S0.1.1)
C. Live Loads – Structural Design Basis
1. Importance Factor – See Structural Design Basis (Sheet S0.1.1)
PART 2 - PRODUCTS
2.1 TEST AND INSPECTION PROCEDURES
A. Low and medium voltage switchgear and low voltage individually mounted switchboards.
1. The switchgear cubicles and circuit breaker compartments shall be cleaned and inspected for evidence of damaged or defective devices.
2. The compartment space heaters shall be inspected for proper operation.
3. All circuit breaker compartment function positions (disconnected, test and connected) shall be checked for proper operation.
4. The busses and bus joints shall be inspected for evidence of overheating, electrical tracking or weakening of the insulation supports on deenergized circuits.
5. Ground bus connections and supports shall be checked for proper tightness on deenergized circuits.
6. Compartment panel door latches shall be checked for proper operation.
7. The circuit breaker elevating/racking mechanism shall be cleaned, inspected, and lubricated with General Electric Company D50H15, Mobil 30 grease, or equal.
8. All potential transformer and control power transformer compartments shall be cleaned and inspected. All PT and CPT fuse clips and fuse ferrules shall be inspected and cleaned.
9. The test data obtained shall be included as part of the Engineering Appraisal Report.
B. Medium Voltage Circuit Breaker
1. The circuit breaker shall be serviced and inspected for proper contact alignment, wipe, gap and sequence.
2. The circuit breaker shall be cleaned and vacuumed and all moveable devices shall be lubricated per manufacturer's requirement.
3. The fuses shall be removed to allow inspection of the fuse ferrules, fuse clips for signs of damage and proper current rating.
4. Inspect key interlocks for proper operating sequence and proper key distribution.
5. The primary contact resistance of each phase shall be measured with a ductor and recorded.
6. Upon completion of inspection, a phasetophase and phasetoground insulation resistance test shall be performed using an insulation resistance tester.
7. The test data obtained shall be included as part of the Engineering Appraisal Report.
C. Substation Transformers (Dry Type)
1. The transformer panels shall be removed to inspect the transformer connections, core assembly and core clamps for discrepancies.
2. The transformer shall be cleaned and the connections shall be checked for tightness.
3. All bus work within the transformer compartment shall be inspected for evidence of overheating or weakening of the insulation supports. The bus mounting bolts and splice connection bolts shall be checked for proper tightness wherever possible.
4. Inspect for proper auxiliary device operation such as fans and indicators.
5. Upon completion of inspection, the load side and the line side shall be subjected to an insulation resistance test using an insulation resistance tester (megger).
5. The test data obtained shall be included as part of the Engineering Appraisal Report.
6. The core grounding strap shall be lifted and the core insulation resistance to ground shall be tested.
7. Perform a turn ratio test in all tap combinations.
9. Perform a dielectric absorption test from winding to winding and windingtoground for ten (10) minutes. A polarization index shall be computed.
D. Cables Medium Voltage
1. The cables shall be inspected for evidence of physical damage, shield grounding, cable support and termination.
2. A DC high potential shall be performed in equal increments until manufacturer's recommended maximum test voltage is reached. DC leakage current shall be recorded at each step after a constant stabilization time consistent with system charging current decay. This test shall be conducted in the contractor's presence.
3. A graphic plot shall be made of leakage current versus voltage.
4. The test data obtained shall be included as part of the Engineering Appraisal Report.
E. Low Voltage Circuit Breakers (480 VAC)
1. Before any servicing is initiated each circuit breaker shall be operated manually and electrically, racked in and out of its cubicle and inspected for proper operation of the circuit breaker mechanisms and electrical devices.
2. Each circuit breaker shall be inspected for contact alignment and correct measurements of wipe and gap.
3. The operating mechanisms shall be cleaned, lubricated with D50H15, Mobil 30 grease, or equal, and inspected for proper operation.
4. The primary and arcing contacts shall be cleaned and inspected for excessive arcing, pitting or abnormal wear.
5. The primary disconnecting device contacts shall be cleaned and lubricated with contact lubricant (D50H47, Mobil 30 grease, or equal).
6. The secondary disconnect and auxiliary relays shall be inspected for excessive arcing, abnormal wear and proper operation.
7. The circuit breaker interlocks, mechanical and electrical, shall be checked for proper operation.
8. The primary contact resistance of each phase shall be measured with a ductor and recorded.
9. After cleaning, a phasetophase and phaseto ground insulation resistance test shall be performed using a 500V megohmmeter.
10. The test data obtained shall be included as part of the Engineering Appraisal Report.
11. Circuit breakers equipped with series or solid state overcurrent trip devices shall be high current tested to verify calibration of the trip devices.
F. Low Voltage Molded Case Circuit Breakers above 250 ampere frame.
1. All circuit breaker terminations shall be checked for physical damage and proper tightness.
2. Circuit breakers shall be operated and checked for proper mechanical operation.
3. Primary contact resistance of each phase shall be measured with a ductor and recorded.
4. The phasetophase and phasetoground insulation resistances of each phase shall be measured with a 500 volt megger and recorded.
5. The test data obtained shall be included as part of the Engineering Appraisal Report.
6. One point in the overload portion and ground fault portion of the trip curve of each phase shall be high current tested at a multiple of the breaker rating and recorded.
7. The instantaneous tripping devices of each phase shall be high current tested at the breaker's minimum setting. Test results shall be recorded and compared to circuit breaker's trip curve.
8. The circuit breaker equipped with solid state overcurrent trip devices may be tested with their respective factory test sets (secondary current injection) for short circuit functions.
G. Low Voltage Motor Control Centers
1. Each motor starter contactor and auxiliary relay shall be inspected for broken or worn parts.
2. All cable and control wiring connections shall be checked for proper tightness and indications of overheating.
3. Each starter module shall be checked for proper mechanical and electrical operation.
4. All motor control center compartments shall be inspected for discrepancies, cleaned and vacuumed.
5. Each starter module shall be checked for proper insulation resistance using a 500V megohmmeter.
6. The test data obtained shall be included as part of the Engineering Appraisal Report.
H. Instrument Transformers
1. The transformers shall be cleaned and inspected for physical damage and proper operation of grounding or shorting devices.
2. The transformers shall be checked for correct polarity and ratio.
3. After cleaning, a phasetoground insulation resistance test shall be performed using a 1000V megohmmeter.
4. The test data obtained shall be included as part of the Engineering Appraisal Report.
I. Metering and Instrumentation
1. All devices shall be inspected for mechanical or electrical damage and wire connection tightness.
2. All devices shall be inspected for meter face and face gaskets conditions.
3. All devices shall be checked for proper reading at three points: full scale, half scale, and zero point.
4. All devices shall be checked for proper calibration and recalibrated where necessary using available external adjustments (i.e., zero adjustment only for standard voltmeters and ammeters).
5. The device selector switches shall be inspected for proper operation.
6. Electronic devices with communications shall be verified to be operating.
7. Multifunction electronic devices with protective relays shall have operation of relays verified.
8. The test data obtained will be included as part of the Engineering Appraisal Report.
J. Grounding System
1. The grounding system shall be inspected for adequate termination at all devices.
2. The ground resistance shall be measured by the two (2) point method, between the main grounding system and all electrical equipment frames, cases, sheaths, and housings.
3. The test data obtained shall be included as part of the Engineering Appraisal Report.
K. Thermal Overload Relays
1. The thermal overload trip device shall be inspected and tested as follows:
a. Inspect and test mechanical operation.
b. Inspect and test electrical operation.
c. Test trip device time delay by current injection of the trip device, one phase only.
2. The test data obtained shall be included as part of the Engineering Appraisal Report.
2.2 TEST REPORT (ENGINEERING APPRAISAL REPORT)
A. Engineering Appraisal Report
1. Submit 3 copies of an engineering appraisal report no later than 15 days after completion of testing unless directed otherwise. The report shall include all the reports of the testing described under test and inspection procedures. The final report shall contain the following:
a. A resume of the equipment on which the service was performed.
b. An executive summary which identifies the work performed on each piece of equipment.
c. Results and recommendations which shall detail any discrepancies found in performance and adherence to the equipment specifications and corrective actions taken.
d. Field data inspection sheet for each piece of equipment inspected, tested and/or serviced.
B. The report shall be bound.
2.3 FAILURE TO MEET TEST.
A. Any component or equipment failing to meet specifications or found to be defective on the basis of the acceptance test shall be documented in the test report. Action to correct the situation shall be initiated by the warranty organization of the equipment manufacturer or the contractor upon discovery.
B. Contractor shall replace or correct the defective material or equipment and have tests repeated until results are satisfactory without additional cost to the Design Builder.
END OF SECTION
May 3, 2012 Testing Specifications
Section 26 08 13 – Page 1 of 5