The specification covers the design, manufacturing, testing at works, supply & delivery of Tamper Proof Poly Carbonate Plastic Seal for sealing electrical installations viz. meter body for energy meters, terminal cover of energy meters, Metal Box and for other metering purpose. The size of the seal shall be 32 x 23 x 5 + 1 mm. These Seals shall be used for LT, HT Industrial Consumers and in theft prone areas. Manufacture should also develop a seal tracking software. Also seals should be patented.
The Poly Carbonate Plastic Seal shall be suitable for satisfactorily working under the following climatic conditions : -
|Max. Ambient Temperature||60° C|
|Min. Ambient Temperature||-5° C|
|Max. Relative Humidity||100%|
|Min. Relative Humidity||23%|
|Altitude||Within 1000 meters above mean seal level.|
The Poly Carbonate Plastic Seal shall be suitably designed and treated for normal life and satisfactory operation under the hot and hazardous tropical climate condition
The seal shall be designed for a single use only. The seal shall be damaged, due to its see through property, if tampered with the help of puller, knife or any other sharp instruments. The sign of internal tampering shall be easily detected; it should not be reused, once opened. The seal shall be made in such a way that it can be easily locked with the help of finger and thumb pressing and no tools shall be required to close the seal in the laboratory or at site. After inserting the seal wire through hole of female part, the cap of the male part shall be fitted in the female part in such a way that it should not leave any space to avoid insertion of any sharp tools for opening of seal body or the female part in hot or cold condition.
The raw material used for polycarbonate plastic seals shall be M/s Dow Caller Ltd. Switzerland (Grade 201-15), M/s GE Plastic Singapore (Grade 143 R), M/s Bayer Plastic 2407 Grade (UV Stabilized) or any other equivalent manufacture having similar material properties as under :-
|Sr.No.||Material Description||Particulars Polycarbonate|
|1||Melting temperature||280° C to 295° C|
|2||Specific gravity||1.20 at 27° C|
|4||Size||33 x 23 x 5 + 0.5 mm. tolerance|
|6||Durability||Weather effect resistant (UV Resistant)|
|7||Transparency||Fully transparent (for the life of the seal)|
The seal body will be colorless, transparent (see through) type, which shall give complete visualization of its fixing mechanism and shall show clear indication if tampered with. Also seal’s anchor can be of different colour like Red, Blue, Yellow, Green and Orange etc for necessary area wise applicable colour coding i.e. two different colours in same seal, which makes seal unique.
The seal will be anchor type, tamper evident with eight locking system and shall be of different color codes (for e.g. one particular color shall be used by M&P Organization other by the (OP) Wring and 3rd by the purchasing/inspecting agency.
Non repeat seven digits numeric Sr.No, on the seal shall be itching type in contrast color. Its should be provided on anchor flap i.e. on the top of anchor part and on body on female part.
The seal shall have facility for embossed type monogram of COMPANY logo in 10 mm circle on front side and rear side of body of seal.
Seal wire should be molded in seal in such way that it should be connecting male female part of the seal and remaining open wire will be used for sealing. The non corrosive non magnetic inox 304/316 grade, seven twisted wires, each of 0.23 + 0.01 mm dia with over all diameter of wire 0.7 + 0.05 mm (minimum shall be used. The diameter of each individual stand wire shall be 0.23 + 0.01 mm (approx) and over all diameters of seal wire shall be 0.7 mm + 0.05 mm so that it can easily insert into the female portion where the diameter of two hole shall be 1.00 mm + 0.1 mm. Total seal wire length should be of 300 mm.(open wire length)
The seal shall be subjected to following tests at the manufacture’s works.
Workmanship and other feature as specification.
As As per supplier drawing.
The seal shall be dipped in the boiling water fore more than one hour and there shall not be any affect of any type on the seal.
The seal shall not get damaged/deformed when kept in the Hydrochloric Acid (34% concentrated) for one hour.
The seal shall be heated at 1470 C (minimum) for one hour. The same shall not get damaged OR deform.
As per IS 4905. The seals, used in testing, shall be destroyed in the presence of inspecting officer.
The designed life of the seal shall be 10 years. However, the seal shall be guaranteed for a period of 66 months from the date of supply. The seals, found defective, within guarantee period, shall be replaced within 45 days form the date receipt of intimation.
The bidder shall have to submit 20 Nos. of samples along with the technical bid. Seals submitted as tender sample shall be identified with trademark or logo on female part of the seal. The seals shall also be serially numbered form 0000001 to 0000020 on top of the male part of the seal as well as on the female part of the seal, so as to be read sequentially while holding the seal. Tender submitted without samples shall be rejected out right and the offer will not be considered. The sample seals shall be tested as per specification if desired by company, third party Govt. laboratory. The tender sample seals not conforming to the specification shall be rejected and the bidders offer not be considered for further evaluation.Go To Video
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