شركة كهرباء محافظة القدس المساهمة المحدودة JERUSALEM DISTRICT ELECTRICITY CO. LTD.
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1 Our Ref.: 14/2018- Date : Messrs: Dear sir, Tender 14/ & 33 KV Lightning Arrestors. You are kindly requested to quote for the supply and delivery to our stores in Shufat Jerusalem, (DDP) of the following materials: Item 1: (450 pcs) lightning arresters (Metal oxide) to be used on a system of nominal working voltage of 33KV(Phase to Phase).With solidly earthed neutral point. The maximum system voltage is 36KV. Item 2: (450 pcs) lightning arresters (Metal oxide) to be used on a system of nominal working voltage of 11KV(Phase to Phase). With solidly earthed neutral point. The maximum system voltage is 12KV. The installation altitude will vary between 450 meters below sea level and 800 meters above sea level. You are requested to fill-in all the blanks in the attached schedules. These arrestors will be used on rural distribution networks, in distribution Transformer protection, and in cable termination protection located in main medium voltage lines. Our area is considered to be a polluted area, so every safeguard should be made to ensure the reliable performance of the arresters. The creepage distance should not be less than 25 mm/kv. Arrestors to be easily mounted on poles and connected to both the Lines and the earth in a simple manner. Essential Bidding Requirements: - A bank certified check or a bank guarantee of 5% of the total tender valid for 90 days, to be submitted as a bid bond, otherwise, quotation will be neglected. - Quotation should be enclosed in a sealed envelope or package and handed over to the Tender Committee by the representative of the bidder or their agent not later than May 31 st, 2018 at 11:00 AM. - TENDER DOCUMENTS FEES: 150 USD. A proof of payment should be sent by to: rnashashibi@jdeco.net.
2 - The main offer envelope or package should include three separate envelopes as follow : a. The financial offer in a separate sealed envelope. b. The technical offer & catalogues placed in a separate sealed envelope. c. Your bid bond in a separate envelope. - Technical offer will be studied separately from the financial offer. The financial offers for bidders whose technical offers do not meet JDECO s technical requirements will not be opened. - In case offers are submitted by an agent on behalf of a certain supplier, a copy of the agreement between the agent and the supplier must also be submitted. Such copy has to be authenticated and certified by the chamber of commerce at the supplier s country of origin. - Offers have to be attached with a letter confirming the authorized persons signing on behalf of the bidder. Any bid package not according to the above will not be considered. Payment method: - 30 days after delivery of goods through bank transfers. - The currency of the suppliers invoices must be the same as the currency of their submitted offer and as specified in the letter of award, otherwise they will not be accepted. Yours Faithfully Hisham Omari Managing Director
3 Tender 14/2018 Technical details and guarantees to be filled by Bidder: No. Details Item 1 Item 2 1 Rated voltage (KV) Continuous oper. voltage (KV) 3 Rated frequency (Hz) Nominal discharge current (KA) Minimum energy discharge capability (KJ/KV) of Ur (wave 8/20) 6 Arrested clarification. 7 Max. Lightining impulse residual voltage (8/20 Micro sec.) at the following discharge current: 2.5KA peak (KV peak). 5.0KA peak (KV peak). 10 KA peak (KV peak). 20 KA peak (KV peak). 8 Max steep current impulse residual voltage (1 Micro sec. Virtual voltage front): -at 5KA peak discharge current (KV peak). -at 10KA peak discharge current (KV peak). 9 Insulator manufacturer. 10 Insulator material. Silicon Silicon 11 Creepage distance from live part to ground (mm). 12 L.A Standard. IEC 99-4 IEC Drawings, tech. Data, catalogues, instruction books of the proposed L.A and their accessories. 14 Maintenance Requirement (give details) 15 Net weight of each L.A (Kg) 16 Dimentions and drawings (mm) 17 Minimum clearance for correct operation 1- To earth metal (mm) 2- Phase to phase (mm) 18 Line discharge class.
4 No. Details Item 1 Item 2 19 Operating duty cycle test: a- Current. b- Wave shape. c- Number of applications. d- Rated voltage of test sample. e- Max. power follow current drawn. 20 High current wihtstand capability with a 4/10 Micro sec. wave: a- Crest current. b- No. of applications. c- Rated voltage of test sample. d- Residual voltage of test sample at arrester rated current: Before test. After test. 21 Fixed long duration, low current withstand capability: a- Crest current. b- Virtual duration of rectangular wave. c- No. of applications. d- Residual voltage across test sample during test. 22 Short circuit withstanding duration. 23 Radio influence voltage measured. 24 Safe cantilever strength at line terminal.
5 Tests: Routine tests: The following tests should be performed as a routine test for surge arrestors according to IEC Measurement of reference voltage. Residual voltage test. Internal partial discharge test. Tightness test (leakage check). Current distribution test. Type tests: Samples from each type of arrestors should be tested according to IEC for the following type test: Long duration current impulse withstand test. Yours faithfully, Hisham Omari Managing Director
شركة كهرباء محافظة القدس المساهمة المحدودة JERUSALEM DISTRICT ELECTRICITY CO. LTD.
Our Ref : 2/2018- Date : Messrs: Dear Sir, Tender 2/2018 Main Transformers You are kindly requested to quote for the supply and delivery DDP to our stores the transformers detailed in the attached schedules
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