ประกวดราคาซื้อชุดอุปกรณ์ Animal barrier และชุด Cutout bracket สำหรับใช้ติดตั้งกับลูกถ้วยโพสท์ แบบ ANSI TR-202 จำนวน 33,515 ชุด เลขที่ กจพ2-ลถ-030.1-2569

• To specify the requirements for insulators used in overhead HV (up to 115 kV) and LV lines.
• To ensure that insulators meet relevant Thai Industrial Standards (TIS), American National Standards Institute (ANSI), and International Electrotechnical Commission (IEC) standards.
• To establish criteria for testing and acceptance of insulator samples.

• Manufacturing of insulators according to specified standards.
• Supply of two (2) samples of each type of insulator within five (5) working days.
• Submission of design/type test reports from accredited laboratories.
• Compliance with marking requirements as outlined in the document.
• Adherence to all testing and reporting procedures stipulated by PEA.

• Insulators conforming to specified standards and requirements.
• Two (2) samples of each insulator type.
• Design/type test reports from accredited laboratories.
• Legibly marked insulators as per specifications.

• Not explicitly stated in the provided text.

• Eligibility Requirements: - Not explicitly stated, but implied to be compliant with Thai procurement law.
• Standards Compliance: Must comply with TIS, ANSI, and IEC standards as listed (TIS 227-2525, TIS 279-2521, TIS 280-2525, TIS 354-2523, TIS 563-2528, TIS 1077-2535, TIS 1251-2537, ANSI C29.1 - 1988, ANSI C29.2A - 2013, ANSI C29.2B - 2013, ANSI C29.9 - 2017, IEC 60383-1 -1993).
• Experience: Must have design/type test reports from accredited laboratories within the last five years.
• Previous Project Cost: - Not specified.
• Technical Capabilities: Must utilize testing facilities approved by PEA or submit detailed information for approval. Laboratories must be members of STL or accredited to TIS 17025 / ISO/IEC 17025.
• Personnel: - Not explicitly stated, but implied that personnel involved in manufacturing and testing should be qualified.
• Exclusions: Basic requirements such as valid business license are not listed.

• Not explicitly stated in the provided text.

• Porcelain insulators must have a brown glaze.
• Pin hole threads of pin type insulators must be zinc thimble according to TIS.
• Suspension insulator shells must be made of high-grade alumina porcelain.
• Marking requirements include manufacturer’s name, year of manufacture, tension-proof test load (for suspension), combined mechanical and electrical strength (for suspension except class 52-1), power arc current & duration (for line-post/pin-post) and PEA’s trademark.
• Thermal-mechanical load cycle test or thermal-mechanical performance test is required for suspension insulators, with specific acceptance criteria: QS ≥ 3.

• Not explicitly stated in the provided text.

• Q: What is the significance of the thermal-mechanical load cycle test?
  A: This test assesses the insulator’s ability to withstand repeated cycles of heating and cooling under mechanical stress. It’s crucial for ensuring long-term reliability.

  • Q: Why are design/type test reports required from accredited laboratories?
    A: To verify that the insulators meet the specified performance standards and quality requirements, providing assurance of their suitability for use.

  • Q: What does the marking on the insulator signify?
    A: The markings provide information about the manufacturer, year of manufacture, test load capacity (for suspension), power arc rating (for line-post/pin-post) and PEA’s trademark, ensuring traceability and quality control.

  • Q: What happens if the submitted samples fail the PEA testing procedure?
    A: The bidder will be rejected from the bidding process.

  • Q: Can I submit a Purchase Order (PO) instead of a design/type test report?
    A: Yes, under specific conditions: If the insulators have been previously supplied to and approved by PEA’s Procurement Department or are registered in PEA’s Product Acceptance list.

  • Q: What is the importance of Portland cement autoclave expansion limit?
    A: This ensures that the cement used in insulator assembly doesn’t expand excessively, which could compromise its structural integrity.

  • Q: What does QS ≥ 3 mean in the acceptance criteria for thermal-mechanical tests?
    A: It represents a minimum acceptable ratio between the average test value (R) and the rated strength value (RS), ensuring that the insulator’s performance meets or exceeds expectations.

  • Q: What is the purpose of power arc testing on line-post insulators?
    A: To evaluate their ability to withstand electrical arcs, a critical factor in preventing failures during fault conditions.

  • Q: What are the acceptable laboratories for design/type tests?
    A: They must be members of STL or accredited according to TIS 17025 / ISO/IEC 17025 with relevant scopes of accreditation.

  • Q: How long are design/type test reports valid?
    A: They are valid for five years from the issue date, counted up to the bid closing date.

1
PROVINCIAL ELECTRICITY AUTHORITY
TECHNICAL SPECIFICATION DIVISION
INSULATORS
Specification No.: RINS-002/2561
Approved date: 21/05/2561
Rev. No.: 2
Form No. 01-1
Page 1 of 9
Invitation to Bid No. :
C Material, equipment, and specifications for INSULATORS
C1 General material and packing instructions
Additional to the general instructions, the following shall be observed :
1a Scope
These specifications cover insulators for overhead HV (up to 115 kV) and LV lines.
1b Standard
The insulators shall be manufactured and tested in accordance with the following standards: Thai Industrial Standards (TIS)
TIS 227 - 2525 Spool-type porcelain insulators
TIS 279 - 2521 Pin-type porcelain insulators
TIS 280 - 2525 Strain-type porcelain insulators
TIS 354 - 2523 Suspension-type porcelain insulators
TIS 563 - 2528 Suspension-type toughened glass insulators
TIS 1077 - 2535 Line-post type porcelain insulators
TIS 1251 - 2537 Pin-post type porcelain insulators
American National Standards Institute (ANSI)
ANSI C29.1 - 1988 Test methods for electrical power insulators
ANSI C29.2A - 2013 Wet-process porcelain and toughened glass – distribution suspension type ANSI C29.2B - 2013 Wet-process porcelain and toughened glass – transmission suspension type ANSI C29.9 - 2017 Wet-process porcelain insulators – apparatus, post – type
International Electrotechnical Commission (IEC)
IEC 60383-1 -1993 Insulators for overhead lines with a nominal voltage above 1000 V – Part 1: Ceramic or glass insulator units for a.c. systems – Definitions, test methods
and acceptance criteria
And all other relevant standards, unless otherwise specified in these specifications.
PEA will accept the design/type test reports in accordance with the later edition of the above standards.
PEA will also accept the design/type test report in accordance with the previous edition of the above standards, if there is no significant change in any test items or no additional test item(s) compared with the above standards. On the other hand, if there is significant change in any test items or there are any additional test items, the previous edition type test report with the additional test report(s) of the significant change test item(s) and/or additional test item(s) will be also accepted.
III

2
PROVINCIAL ELECTRICITY AUTHORITY
TECHNICAL SPECIFICATION DIVISION
INSULATORS
Specification No.: RINS-002/2561
Approved date: 21/05/2561
Rev. No.: 2
Form No. 01-1
Page 2 of 9
1c Principal requirement
1c.1 General
The porcelain insulators shall be brown glazed.
The pin hole threads of the pin type insulators shall be zinc thimble according to TIS .
The insulator shells of suspension insulator of porcelain type shall be made of highest grade, dense, homogeneous, wet-process, high strength alumina porcelain.
The surface shells of suspension insulator of porcelain type exposed after the assembly shall be relatively smooth and free of imperfections.
The porcelain head of the suspension insulator shall be cylindrical headed with sand surfaces; the “dove tail” shaped head shall not be accepted.
For the line-post insulator and pin-post insulator, the porcelain part shall be factory-fixed with stud, washer, nut, and lock nut.
1c.2 Marking
Each insulator shall be marked legibly and durably, as follows :
(1) Manufacturer’s name and/or Trade-mark.
(2) Year of manufacture.
(3) Only for suspension insulators :

• Tension-proof test load in kN, identified by the word “TEST”.
• Combined mechanical and electrical strength in kN, identified by the symbol “M&E, except that of class 52-1.
  (4) Only for line-post insulator and pin-post insulator : Magnitude of the power arc current in kA and duration in second, identified by the word “POWARC”.
  (5) PEA’s trademark, as the figure shown.

(6) Others according to manufacturer’s design.
1c.3 Sample
The bidders have to supply two (2) samples of each item of the insulators within five (5) working days counted from bid closing date. The bidders who cannot supply the requested samples shall be rejected.
PEA reserves the right to test the samples according to PEA’s testing procedure. In case of the failing test results, the bidders shall be rejected.
The samples shall not be returned.
III

3
PROVINCIAL ELECTRICITY AUTHORITY
TECHNICAL SPECIFICATION DIVISION
INSULATORS
Specification No.: RINS-002/2561
Approved date: 21/05/2561
Rev. No.: 2
Form No. 01-1
Page 3 of 9
1c.4 Tests and test reports
HV insulators and LV insulators shall be passed all item of design/type tests, quality conformance tests and routine tests in accordance with the relevant TIS or ANSI or IEC.
The design/type tests for suspension insulator, line-post insulator and pin-post insulator shall conform to as follows :
(1) The proposed HV insulators shall have successfully passed the design/type test in accordance with the relevant standard.
For suspension insulator, thermal-mechanical load cycle test in accordance with the ANSI, or thermal-mechanical performance test in accordance with the IEC, shall be included.
(2) The additional acceptance criteria for determining conformance with PEA’s requirements for thermal-mechanical load cycle test (or thermal-mechanical performance test) and combined
mechanical and electrical strength tests (or electromechanical and mechanical failing load
tests) shall be as follows :

R - RS = QS ≥ 3
S
Where :
QS = Criteria of judgement for acceptance
R = Average value obtained from the test
RS = Rated Mechanical and Electrical strength value of the insulator
S = Standard deviation from the test
Each value measured shall not be lower than the rated Mechanical and Electrical strength;
electrical puncture shall not occur before reaching ultimate failure.
Sample size shall be of ten (10) units.
The insulators shall be passed the special tests as follows :
For line-post insulator and pin-post insulator : power arc test (see Appendix 1).
For suspension insulator : steep wave front impulse test and power arc test (see Appendix 2). If Portland cement is used in the assembly of the insulators, it shall have an autoclave expansion limit of less than 0.12 percent when tested in accordance with ASTM C 151-84 or later edition, Test method for autoclave expansion of portland cement.
III

4
PROVINCIAL ELECTRICITY AUTHORITY
TECHNICAL SPECIFICATION DIVISION
INSULATORS
Specification No.: RINS-002/2561
Approved date: 21/05/2561
Rev. No.: 2
Form No. 01-1
Page 4 of 9
The design/type tests and the special tests shall be conducted or inspected by the acknowledged testing laboratories/institutes as following:
(1) Independent laboratories/institutes which are members of the Short-circuit Testing Liaison (STL) or independent laboratories/institutes which are accredited according to TIS 17025 or ISO/IEC 17025 with the scope of accreditation covered the relevant test items, standards and equipment. The certification and scope of accreditation of the independent laboratories/institutes shall be submitted with the bid for consideration.
(2) Thailand’s national laboratories, institutes, universities and electric utilities, as follows:

• National Metal and Materials Technology Center (MTEC)
• Electrical and Electronic Products Testing Center (PTEC)
• Thai Industrial Standards Institute (TISI)
• Electrical and Electronics Institute (EEI)
• Department of Science Service (DSS)
• Testing Laboratory, Electrical Engineering Department, Faculty of Engineering, Chulalongkorn University
• Electricity Generating Authority of Thailand (EGAT)
• Metropolitan Electricity Authority (MEA)
• Provincial Electricity Authority (PEA)
• Other laboratories, institutes, universities or electric utilities approved by PEA
  The bidders or manufacturers who prefer to carry out the insulators with the laboratories or by the manufacturer themselves without the qualification mentioned above, the detail of the test facilities of the laboratories or the manufacturer shall be submitted to PEA for approval before proceeding the tests and before the bid closing date. PEA reserves the right to send representatives to inspect and witness the tests with the cost of the bidders or manufacturers.
  The design/type test report done by the laboratories in Thailand or local manufacturers shall be valid within five (5) years counted from the issued date in the test report to the bid closing date.
  The bidders have to submit the design/type test reports and/or design/type test certificates of the insulators with the bid.
  III

5
PROVINCIAL ELECTRICITY AUTHORITY
TECHNICAL SPECIFICATION DIVISION
INSULATORS
Specification No.: RINS-002/2561
Approved date: 21/05/2561
Rev. No.: 2
Form No. 01-1
Page 5 of 9
PEA will also accept other documents instead of the design/type test reports and design/type test certificates in the following conditions:
(1) In case the proposed insulators has been supplied to PEA and get the order from PEA’s Procurement Department (from PEA’s head office), the Purchase Order (PO) can be submitted, or (2) In case the proposed insulators has been registered for PEA Product Acceptance, the not-expired registration certificate counted to the bid closing date can be submitted, or
(3) In case the proposed insulators has been registered for Product lists for substation turnkey project, the not-expired registration certificate counted to the bid closing date can be submitted instead
However the document in case (1) and (2) shall be proved that the insulators specified in the PO or registration certificate shall be the same product, type/model and all ratings as the proposed insulators for this bid and shall be used the same PEA’s specification number. In case (3), the insulators specified in the registration certificate shall be the same product, type/model and all ratings as the proposed insulators for this bid.
The cost of all tests and reports shall be borne by the Bidders/Contractor.
III