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Product - Dual Lock Small   Page  -  1 | 2      
     
 
DUAL LOCK SMALL - Specification

SCOPE :
The Specification covers the Design, manufacture, testing at manufacturers works and supplying, delivery of temper proof polycarbonate plastic seals for sealing electrical installations vlz: Meter body of energy meters. Terminal cover of energy meters and Metal Box, and for other accounting purpose. The size of the seal shall be 18 X 14 X 7mm. these seals shall be used for LT/HT Industrial Consumers and in theft prone areas.
 
 
The Polycarbonate seals will be conformed to the following specification as under:

1. Material of Plastic Seal:
The raw material used for polycarbonate plastic seals shall be of M/s. Dow Caller Ltd. Switzerland (Grade 201-15) M/s. GE Plastic, Singapore (Grade 143R), M/s. Du Pont, Japan (Grade LV-11, U.V. Stabilize) or any other equivalent manufacturer having similar material properties as under:

Sr. No. Item Polycarbonate
1 Melting temperature 280o C to 295o C
2 Use Engineering
3 Softness Hard
4 Durability Weather Effect resistance
5 Transparency Fully transparent (long time transparency)
 
2. Colour of seal

The seals will be colorless, transparent (See through) Type, which shall give complete visualization of its fixing mechanism and shall show clear indication if tampered. Also seals can be available in different colour like Red, Blue, Yellow, Green, and Orange etc.
 
3. Design and Construction of seal

A. Design:
The Seal will be Anchor type tamper evident with double locking system as per drawing no. AP – 05 & 06 attached with the specification only.

B. Size of the Seal:
The size of the female part of the seal shall be as under:
  • Size: 18 x 14 x 7 mm + 0.5 mm
  • Size of the hole of female part: The size of the hole shown in the drawing should be sufficient to insert seal wire, but in no case, more than 1.0 mm + 0.1 mm
  • Wall thickness should be 0.8 mm (No negative tolerance)

C-1. Serial No. of the Seal:
Non repeat seven digits Sr. Nos. with code no. on the seal shall be embossed and it shall not be screen printed or laser mark/ itching and it should be provided on male and female portion at the place mentioned in the drawing i.e. on the top in male part and on the side in female part. Please note that Sr. No. of seal shall not be embossed after the seal is manufactured. The size of the digit shall be 1.5 X 2.5 mm (W X H).

C-2.
Also seals have special features like neon text coding on anchor part of seals, and should have facility to have UV numbering on seals(i.e. same serial number of seals should be UV visible) this numbers are visible only by ultra violet light.

D. Monogram:
The seal have monogram of Company logo in 8 mm circle on front side and month & year in figure on backside in 8 mm circle.

E. Seal Wire
The non corrosive non magnetic as per is 304 stainless steel twisted wire (26 SWG) shall be used as under. The seal wire shall not have affect of magnet. i.e. it should not attract to magnet.

1. On seal open wire stainless steel twisted of 26 SWG. Of 160 mm (Or as per client requirement) Length and 65 mm + 5.0 mm. Molded wire as shown in the drawing.

The diameter of each individual strand wire shall be 0.45 mm (approx) (26 SWG) and over all diameters of seal wire shall be 0.9 mm + 0.05 mm, so that it can easily insert into the female portion where the diameter of the hole shall be 1.0mm + 0.1mm.

2. The seal wire used for the above size of seals shall be inbuilt in connecting male and female part of the seal as shown in the drawing and as per the above dimensions. The application of the seal wire is to insert seal wire and through the hole via female part and insert the male part into female part by applying thumb pressures to lock the seal.
 
Dual Lock Small - ERDA
 
 
     
     
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