If Cable Termination, Earthing & Water Proofing

7/30/2019 If Cable Termination, Earthing & Water Proofing

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IF Cable Termination, Earthing & Water Proofing


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Table of Contents

1. IF Cable Grounding

1.1 Material and Tools1.2 Grounding Kit

1.3 Grounding Cable Termination

1.4 Waterproofing of Grounding Cable

2. IF Cable Termination

2.1 IF Cable Termination with N-Type Connector

2.2 N-Type Connector Installation Procedure

2.3 Waterproofing of IF Cable ODU End

3. Surge Arrestor Installation

3.1 Surge Arrestor Installation Guide

3.2 Grounding of Surge Arrestor

3.3 Waterproofing of Coaxial Cable Termination


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1. IF Cable Grounding

1.1 Material and Tools for IF Cable Grounding

1.1.1 Material

Grounding Kit

Thimble

Self bonding Tape

PVC Protection Tape

1.1.2. Tools

Knife

Cable Cutter

Measure/Ruler

Adjustable Wrench

Hand Crimping Tool


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1.2 Grounding Kit

Earthing Cable of 6mm

Fixing spring clampThimble

Earthing Connector


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1.3 Grounding Cable Termination (1/4)

Step.1 Mark on the cable for the size of Earthing Connector


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Step.2Cut & remove the sheath of IF cable, be sure not to damage the braided shield

Step.1

Step.2

Step.3

Step.4


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Step.3 Place and fix the Earthing connector on the IF cable as shown in pictures

Fixing spring clamp on Earthing ConnectorEarthing Connector on IF cable


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Step.1

Step.2

Earth Bus bar at Horizontal cable tray

Earth Bus bar at Vertical cable tray

Step.4 Crimp the thimble with crimping tool and terminate at Earth Bus bar


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1.4 Waterproofing of Grounding Cable part (1/3)Many times water penetration inside the IF Cable from the Grounding point, resulting in moisture,

was observed on Straight Connector and Surge Arrester part (water accumulated in the horizontal

cable portion). To overcome this; set Spring Clamp for firm fixing with grounding kit. It moves when

the spring clamp is not tightened. As a result, the waterproof taped part moves and a crack is built.

Moistures penetrates from Grounding cable crack and accumulate at free space of connector point.

The one which has possibility of moisture penetration is because of wrong point sealing, not sealed

Grounding cable crack with silicon paste (silicon rubber) or not sealed with proper thickness of self-

bonding tape.

Cracks to be sealed

with silicon paste

Self-bonding

Tape (>2mm)cracks to be

sealed

1 Point seals step

Spring Clamp for fixing

Seals of cable crack with silicon paste (silicon rubber) and then total shielding

with self-bonding tape (more than 3mm thickness).

3

Protective Taping (>3 layer), with PVC tape.

The direction of the winding always ends on the side of ODU/ANT or

upper to prevent the infiltration of water.

4

2 Shielding of cable connection part. All naked uneven metal to be shield(wraps) with self-bonding tape, without IF cable.


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1.4 Waterproofing of Grounding Cable (2/3)

Step 1. Apply the self bonding tape to fill the cracks on ends of Earthing kit for leveling

Self bonding tape more than 3mm thickness

Step 2. Apply more than 3mm thickness self bonding tape for Shielding of all naked uneven metal,

and shield the cable cracks with silicon paste .

Self bonding tape to fill the cracks

Step1

Step2

Note: Crack between cables should be shielded with silicon paste before taping


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1.4 Waterproofing of Grounding Cable (3/3)

Step 4. Use 100 mm black Tie wrap to tie the both ends of Earthing kit after applying the PVC tape

PVC Protection Tape

Step 3. Apply 3 layers of PVC Protection Tape

Tie Wrap at both ends

Note: Finish taping from bottom to ODU/ANT side or upper side


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2.1 IF Cable Termination with N-Type Connector

Parts of N-Type Connector (Straight) shown in below.

1. Lock Nut

2. Washer

3.Gasket

4.Clamp A

5.Clamp B

7.Insulation

8.Connector Shell

1 2 3 4 5 76 8

6.Center Contact Pin

2. IF Cable Termination


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2.2 N-Type Connector Installation Procedure (1/6)

Step 1. first fit the lock nut, washer and gasket on the cable as shown

Lock Nut

Washer

Gasket (Rubber)


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Step 2. Strip back the cable sheath, taking care not to damage the braided shield, and fit the

clamp A

Step 3. Fold back the braided shield (separating the strands of braid) and trim it

Step.2 Step.3-1 Step.3-2

Clamp A


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Step 4. Cut away the insulation from the center conductor and fit the clamp B. Be sure

not to cut or scratch the conductor while striping the insulation.

Clamp B

Step.4 -1

Step.4


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Step 5. Cut the center conductor. Taper the end of the conductor using file as shown in the circle

Step 6.Mount the center contact pin onto the center conductor as shown


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Insulation

Step 7. Mount the insulation onto the center contact

Step.7


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Step 8. Insert the cable into the connector shell

Step 9. Tighten the lock nut

Step.8

Step.9

Note: Never turn the connector shell


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2.3 Waterproofing of IF Cable at ODU End

Step 1. Connect IF cable with ODU and tight properly.

Step 3. Apply more than 3mm thickness of self bonding tape by stretching its each turn.

Step 4. Apply three or more layers of PVC protection tape by over lapping its each turn.

Self bonding tape >3mm thickness Three or more layers of PVC tape

Step 5. Use 100mm black tie wrap to tie the both ends after applying PVC tape on connector.

Step 2. Apply self bonding tape on moving parts of connector to seal the cracks.

Note: 1. Wrapping of tape should be finished at ODU end

2. IF cable should turned down ward direction


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3.1 Surge Arrestor Installation

GuideInsert the surge arrestor and NJ-NJ adapter in between both NP-Type connectors as shown infollowing picture.

N-Type connector N-Type connectorNJ-NJ Adapter

Surge arrester

Surge arrestor grounding thimble

3. Surge Arrestor Installation Guide


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3.2 Grounding of Surge Arrestor

Step 1. Connect grounding thimble to the surge arrester as shown in picture.

Step 2. Do proper water proofing and labeling.

Step 3. Connect the grounding cable with earth bus bar.

Surge arrester grounding Surge arrester weatherproofing Grounding cables at Bus bar

Step 3

Step1 Step2

3 3 Waterproofing of Coa ial Cable Termination (1/5) R 13/J l/08 (Y D)


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3.3 Waterproofing of Coaxial Cable Termination (1/5) Rev. 13/Jul/08 (Y.D)

Point seals and leveling: Use Self-Bonding (adhesion) rubber tape, pull it (stretch) until becomes thin and then

wrapping on the crack point. (stretch or expand self-bonding tape to max (800% Scapa).

1stStep

Cracks to be sealed Seals packing for cable fixing.

The vibration of the cable always

breaks this packing and shield

wires of coaxial cable.

Water

infiltration

Water

infiltration

SURGE ARRESTORCOAXIAL

TERMINATION

COAXIAL

TERMINATION

No water proofing points

(cracks of moving parts)

2nd Step Shielding of cable connection point: 1) Shield with self bonding tape (>3mm thickness).

2) Connect grounding cable to arrestor body.3) suppresses4) Silicon seals

3 3 Waterproofing of Coaxial Cable Termination (2/5)


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Use a PVC protection tape, It pulls at 1st laying for fastens up the self-bonding (autohesion) layer.

Overlap the PVC tape to half width. 2nd to 3rd laying, it does usual wrapping method.

The direction of the winding always ends on the side of ODU/ANT (up) to prevent the

infiltration of water.

Never use Vinyl insulating tape !!. The tape which has a elasticity (soft) can not use.The PVC protection tape has only a few stretch margin and it has high resistance for outdoor use

(compared with the usual vinyl insulation tape).

4th Step Protective Taping (3 layer) Cable tie

ODU/ANT (up) side

The rubber fusion layer >3mm thickness

3rdStep Total Shielding: Use Self-Bonding Tape, It pulls (stretch >100%) tape to ensure effective

bonding (fusion, adhesion) and then wrap until sufficient thickness (>3mm).

First use a silicon seals for grounding cable to seals this cable crack.

Shield with self bonding tape (more than 3mm thickness)ODU/ANT up-side

3.3 Waterproofing of Coaxial Cable Termination (2/5)


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3.4 Surge Arrestor Waterproofing Guide (3/5)

Step 2. Apply self bonding tape to moving parts of connector to seal the gap as shown in picture.

Before filling the cracks with self bonding tape After sealing the cracks with self bonding tape

Step 1. Remove the thimble from surge arrestor and terminate on the earth cable of 2.5mm.

Step 3. Seal up the earth cable connection part (Thimble) gently.

Step 4. Connect earth cable to surge arrestor body.

Step 5. Suppress earthcable to connector body and IF cable.

Step 6. Put silicon paste to seal the cracks between cables.


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3.3 Surge Arrestor Waterproofing Guide (4/5)

Step.7 Apply more than 3mm thickness of self bonding tape by stretching each turn of tape.


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3.3 Surge Arrestor Waterproofing Guide (5/5)Step 8. Apply two or more layers of PVC protection tape by over lapping each turn of tape.

Step 9. Use 100mm long black tie wrap to tie the both ends after applying PVC tape on

connector.

PVC Protection Tape Wrapping 100 mm Black ties on connector

Documents

If Cable Termination, Earthing & Water Proofing