cable locating, detection & cable fault finding for 11kv & 33kv, guidebook

8/20/2019 Cable Locating, Detection & Cable Fault Finding for 11kV & 33kV, Guidebook

1/168

Ltd

CABLE JOINTS, CABLE TERMINATIONS, CABLE GLANDS, CABLE CLEATSFEEDER PILLARS, FUSE LINKS, ARC FLASH, CABLE ROLLERS, CUT-OUTS

11KV 33KV CABLE JOINTS & CABLE TERMINATIONSFURSE EARTHINGwww.cablejoints.co.uk

Thorne and Derrick UK

Tel 0044 191 490 1547 Fax 0044 191 477 5371Tel 0044 117 977 4647 Fax 0044 117 9775582


2/168


3/168


4/168


5/168


6/168


7/168


8/168


9/168


10/168


11/168


12/168


13/168


14/168


15/168


16/168


17/168

The principal of electromagnetic induction can be


18/168


19/168


20/168


21/168


22/168

8 Locating a Sonde


23/168


24/168

Section 7. Advanced theory. Twin aerial antenna

aerial.


25/168


26/168


27/168


28/168


29/168


30/168


31/168


32/168


33/168


34/168


35/168


36/168


37/168


38/168


39/168


40/168


41/168


42/168


43/168


44/168

Part 1 Section 9.Choosing a suitable locator

2 Matching locator features and optional accessories to the job

Necessary Desirable Optional

Locating set options

Low frequency

Medium frequency

High frequency

Very high frequency

Current direction recognition

‘A’ frame fault nd

Transmitter options

Medium power >1 Watt

High power > 3 Watt

Rack mounted transmitter

Output control

Power display

Impedance match and display

Auto impedance match

Connection indication

Special connection clips

Signal clamp

Plug connector

Live cable connector

Long ground cable

Socket for external 12V supply

Rechargeable batteries

Sonde(s)

Receiver options

Twin aerials

Precision antenna

Power mode

Radio mode

Audio response

Auto/manual gain control

Electronic depth measurement

LCD display

Current measurement

Auto testClamp antenna

Stethoscope antenna

Submersible antenna

Software update

Rechargeable batteries

L o c a t i n

g b

e f o r e d i

g g i n

g

L o

c a t i n

g p o

w e r

d i s t r

i b u t i o

n

L o c a t i n

g l o

c a l t

e l e c o

m

L o c a t i n

g l o n g

d i s t a n

c e t e l e

c o m

L o c a t i n

g m

e t a l d

i s t r i b u

t i o n p i p e

s

L o c a t i n

g p i p e l i n

e s

L o c a t i n

g u n d

e r w a t e r

L o c a t i n

g i n

d u s t r i a l s i

t e s e r v i c

e s

L o c a t i n

g c a b l

e s h

e a t h

f a u l t s

L o c a t i n

g c a b l e

c o n d u

c t o r

f a u l t s

L o c a t i n

g n o n

- m e t a l l i

c d r a i n

s a n d d u

c t s

L i n

e i d

e n t i

c a t i o

n

S i t e

s u r v e

y f o r b u

r i e d

u t i l i t i

e s

N e w

l i n e

a c c e p t a n c e

C u r r e n t

g r a d i e n t

s u r v

e y

S h o

r t d

i s t a n c

e b o

r i n g

G r o u n

d p o t e n t i a l s

u r v e

y

43


45/168


46/168


47/168


48/168


49/168


50/168


51/168


52/168


53/168


54/168


55/168


56/168

The line may have become deeper. Increase sensitivity to see if it is


57/168


58/168


59/168


60/168


61/168

Confirming the position a peak pinpoint with a null pinpoint indicates that


62/168


63/168


64/168


65/168


66/168


67/168


68/168


69/168


70/168

Section 10. Locating buried markers


71/168


72/168


73/168


74/168


75/168


76/168


77/168


78/168


79/168


80/168


81/168


82/168


83/168


84/168


85/168


86/168


87/168


88/168


89/168


90/168


91/168


92/168


93/168


94/168


95/168

.2.1


96/168


97/168


98/168


99/168

.4.1


100/168


101/168


102/168


103/168


104/168


105/168


106/168


107/168


108/168


109/168


110/168


111/168


112/168


113/168


114/168


115/168

.5


116/168

applied.


117/168


118/168


119/168


120/168


121/168


122/168


123/168


124/168


125/168

.7

.13


126/168


127/168


128/168


129/168


130/168


131/168


132/168


133/168


134/168


135/168


136/168


137/168


138/168


139/168


140/168


141/168


142/168


143/168


144/168


145/168


146/168

A comparisonElectromagnetic and plastic pipe location

Similarities- Time spent carefully applying the signal iscrucial to the locate.

- Apply a signal from a service connection to themain- Trace pipe away from the transmitter- Use the receiver to get contrasting responses tolocate the line or pipe.

Differences- Unlike an electromagnetic transmitter the plasticpipe transmitter may need adjustment during atrace because of changes in water velocity- Pressure wave signal does not couple to otherservices. Coupling can be a serious problem withelectromagnetic locating.- Flat response from a pressure wave signalperhaps up to 60cm/24" wide over a targetcompared to the narrow electromagnetic peak or

null response- Ground conditions affect response to a pressurewave signal, less precise under paving.Electromagnetic locator response hardly affectedby paving or ground conditions.


147/168


148/168


149/168


150/168


151/168


152/168


153/168


154/168


155/168


156/168


157/168


158/168


159/168


160/168


161/168


162/168


163/168


164/168


165/168


166/168


167/168


168/168

World

leaders

Technical

support

Servicing

and repair

Training

CABLE JOINTS, CABLE TERMINATIONS, CABLE GLANDS, CABLE CLEATSFEEDER PILLARS, FUSE LINKS, ARC FLASH, CABLE ROLLERS, CUT-OUTS

11KV 33KV CABLE JOINTS & CABLE TERMINATIONSFURSE EARTHINGwww.cablejoints.co.uk

Thorne and Derrick UK

Tel 0044 191 490 1547 Fax 0044 191 477 5371Tel 0044 117 977 4647 Fax 0044 117 9775582

cable locating, detection & cable fault finding for 11kv & 33kv, guidebook

Documents