Type Tests. Cables shall be subjected to all type tests specified in IEC 60502-1; when type tests have been successfully performed on a type of cable covered by this standard with a specific conductor cross-sectional area and rated voltage, type test certificate will be accepted as for cables of the same type with other conductor cross-sectional areas and/or rated voltages, provided the following three conditions are all satisfied:
Type Tests. In accordance with the requirements of IEC 60137 plus:-
Type Tests. In accordance with the requirements of IEC 60214, the power frequency withstand voltage test is to be applied between electrically adjacent contacts; the test shall be carried out at half normal service voltage.
Type Tests. One transformer of each type shall be subjected to the following type tests. Impulse-Voltage Withstand Test - One transformer of each outdoor design, rating and voltage ratio shall be tested in accordance with IEC 60076-3: 2000, Clauses 12 and 13. Neutral terminals shall be connected as in service, i.e. neutrals of fully insulated windings shall be left isolated. Approved means shall be provided to prevent voltages in excess of 75% of the design impulse voltage of the associated winding from appearing at the line terminals not under test. Except where modified below at least one terminal of the winding or windings not under test on the same limb as the winding under test shall be solidly earthed. The transformer tank shall be efficiently connected by low impedance copper strip to the impulse generator earth point and the whole well earthed. Arcing horns, if fitted to the transformer bushings, shall be adjusted to the maximum setting permitted by the bushing design or shall be removed. Temperature Rise Test - One transformer of each rating and voltage ratio with is own tank, voltage control apparatus, and cooling apparatus, if any, shall be tested in accordance with the provisions of IEC 60076. Unless otherwise agreed with the Engineer the temperature rise test shall be carried out with the transformer on normal ratio. Capacitance Test - The capacitance between windings and to earth shall be measured by an approved method. Short Circuit Test - When required by the Engineer a full voltage short-circuit test shall be performed on a typical transformer. With the high voltage winding energised at full voltage from a supply source which will maintain this voltage under fault conditions, a short-circuit shall be applied to the low voltage terminals and held for 5 seconds in accordance with the Specification Clause headed "Duty Under Fault Conditions". It shall be demonstrated that the transformer has substained no damage as a result of this test. A separate price for this test shall be entered in Schedule 'J2'. Noise Level Test - Noise levels shall be measured with the transformer on no load at normal voltage and frequency. Where a transformer has more than one rating, measurements shall be repeated with the cooling system corresponding to each rating in operation. All readings shall be made at the "A" weighting using a precision sound level meter conforming to IEC.61672. The calibration of this instrument shall be verified before and after the tests. The backgro...
Type Tests. Type tests shall be conducted at Contractor’s or Subcontractors’ sites, unless another site is previously approved in writing by Authority. Contractor shall provide type test certificates certifying that Contractor followed the procedures reviewed and responded to by Authority as part of its review of the Testing and Commissioning Program.
Type Tests. Type tests shall be in accordance with the relevant IEC Recommendation or other applicable standard. Tests shall also be carried out to prove composite relay systems, e.g. differential relays in respect of stability, sensitivity, operating time, settings and setting ranges under all fault conditions. These shall be performed in a manner to simulate working conditions as closely as possible utilizing equipment assembled as in service and including resistance not less in value of any external leads associated with the equipment as connected at site.
Type Tests. Type tests shall be submitted by the successful Respondent(s) when changes are made to either the transformer design,, manufacturing process, component(s) or raw material. The type tests for temperature rise, BIL, RN, sound level and short circuit shall be carried out on representative unit(s) on order when requested by Toronto Hydro unless Certified Test Reports are made available from other units whose equivalence with regard to the required tests are acceptable to the Toronto Hydro. The Respondent(s) must submit such Certified Test Reports for approval by Toronto Hydro upon Toronto Hydro’s initial order of the transformer. Respondents shall include in their Proposal, in addition to the unit prices, the cost for performing each of the type tests noted above in the event that the Certified Test Reports results, based on representative units, prove unacceptable.
Type Tests. (a) Vacuum Tests - One transformer tank of each size shall be subjected when empty of oil to a vacuum of 70 kN/m2 below atmospheric pressure. The permanent deflection of flat plates after the vacuum has been released shall not exceed the value specified below.
Type Tests. 47 6.7 PORCELAIN INSULATORS 48
Type Tests. 5.01 The bidder shall furnish valid and authenticated type test certificates from a Govt. approved / Govt. recognized / NABL Accredited laboratory / ILAC i.e. International Laboratory Accredited Laboratory (in case of foreign laboratory) of similar rating and design of tendered material/ equipment. Such type test certificates should not be older than 3 years as on the date of bid opening. For this purpose date of conducting type test will be considered. The type test certificate by in house laboratory of tendering firm even if it is a Govt. approved / Govt. recognized / NABL accredited / ILAC accredited, shall not be accepted, in case of their own tender. This will not apply if tendering firm is Govt. company / public Sector undertaking.
