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Installation Notice Of Explosion Proof Cable Seal Joint

Mar. 26, 2019

Installation notice of cable seal joint

1.Connection of conductors                                                                                                                                                                                                                                                              Connection of conductors from Dust Explosion Proof Appliance Supplier requires low resistance and sufficient mechanical strength, and sharp angles should not appear at the connection. Compression joint is commonly used for conductor connection of medium and low voltage cables.

(1) select the appropriate conductivity and mechanical strength of the conductor connection tube;

(2) the fit gap between the inner diameter of the pressure pipe and the outer diameter of the connected wire core is set at 0.8-1.4mm;

(3) the resistance value of the pressed joint shall not be greater than 1.2 times of the conductor of equal section, and the tensile strength of the copper conductor joint shall not be less than 60N/mm2;

(4) before bonding, the outer surface of the conductor and the inner surface of the connecting tube shall be coated with conductive adhesive, and the oxide film shall be destroyed by steel wire brush;

(5) the sharp corners and rough edges of connecting pipes and conductors, etc., are smoothed with a file or sandpaper.

2. Internal semiconductor shielding processing

Has the inner shield cable ontology, must restore when making joint pressure inside shield conductor section of the joint, both within the semiconductor shielding cable to set aside part of in order to make the connection pipe connection shielding can be interconnected in the head, to ensure the continuity of the semiconductor and make joint takeover of the field intensity distribution.

3. Processing of external semiconductor shielding.

External semiconductor shielding is a semi-conductive material that ACTS as uniform electric field outside the insulation of cables and cable joints. The outer semiconductor port must be neat and even, and it is required to make smooth transition with insulation, and connect with the semiconductor shield outside the cable body by wrapping a semiconductor belt in the cable connector.

4. Processing of cable reaction force cone.

Construction shape, to the best of accurate to react cone, potential distribution on the cone is equal, in the production of crosslinking cable reaction cone, generally USES the special-purpose cutting tool, can also use a bit micro fire heating, use a sharp knife cutting, the basic shape, with a 2 mm thick glass scratch, in the end, from coarse to fine sand paper burnish, until smooth for until.

                           Dust Explosion Proof Appliance Supplier

5. Metal shielding and grounding treatment.

Metal mask in the role of cables and connectors is mainly used for transmission cable fault, short-circuit current and electromagnetic interference shielding electromagnetic field near to communications equipment, metal mask in good running condition of ground conditions at zero potential, when after the cable is broken, it is in a very short time conduction ability of short circuit current. The grounding wire shall be reliably welded, the metal shield and armor belt on the body of the box cables at both ends shall be securely welded, and the grounding of the terminal head shall be reliably.

6.Joint sealing and mechanical protection.

The sealing and mechanical protection of the joint is the guarantee to ensure the safe and reliable operation of the joint. Should prevent the cable joint infiltration of moisture and moisture, in addition to the joint position should be installed in the joint joint protection groove or installed cement protection box.

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