7/24/2019 Smartcleat 2010 09x

1/4

Snhvit, S tatoilSnhvit, S tatoil

2-4M,ConocoP hillips

Ormen Lange, Hydro

Bayu-Undan,Conoco PhillipsAus tra lia

7

7/24/2019 Smartcleat 2010 09x

2/4

A mec ha nica l ca ble c lea t test

SmartCleat Summary from the Sintef, Trondheim, Norway test (2002):

TREFOIL CABLE CLEATTrefoil Ca ble Clea ts a re mainly use d for holding high voltag esingle co re cab les in tria ngular form, but ca n also b e used forsingle cab les a nd bundles o f cab les.

SmartCleat fits cables between 25-99 mm in diameter and

single ca bles or bundles of ca bles up to 99 mm in diameter.SmartCleat is specially made to resist the extreme dynamicenergy w hich ca n oc cur with pow erful short c ircuits inelectrical installations.

The clea ts a re teste d w ith sho rt circuits up to 160 kA-Pe a k.

As the photos show , the neates t a nd mos t functional solution is to cleat the ca ble w ith close spa cings - which a lsoensures that the cable is fully reusable.Wider spa cings do not us ually result in greater loa ds on cleats, b ut the broa d a rch of the ca ble ca n da mag e thesurroundings and stretch the terminations. A non-heavy d uty mantle ma y g et da mag ed from impact with theintermediate rung. Choice of cleat spacing should therefore be decided in consultation with the cable supplier.

SmartCleat trefoil cable cleatshave been tes ted to meet the highes tcus tomer s ta nda rds for short circuit c urrent.Here a re s ome of the tes t res ults fromNorwegian testing institute Sintef:

Cleat spacing: 150 mmShort circuit current: 160 kA peak.Res ult. RMS 87 kACleat bec omes slightly " rounder" in sha pe, but w ithout reducing

strength and functionality.Cab le shows no arching or damag e.Cable ladder shows no deformation.

Cleat spacing: 300 mmShort circuit current: 135 kA peak.Res ult. RMS 73 kACleat bec omes slightly " rounder" in sha pe, but w ithout reducingstrength and functionality.Cable shows clear arching and stretch marks may appear on mantle.Cable ladder shows no deformation.

Cleat spacing: 600 mmShort circuit current: 133kA peak.Res ult. RMS 72 kACleat bec omes slightly " rounder" in sha pe, but w ithout reducingstrength and functionality.Cable shows clear arching and stretch marks may appear on mantle.Ca ble lad der show s slight de formation on intermediate rungs.

Cleat spacing: 900 mmShort circuit current: 103kA peak.Res ult. RMS 65 kACleat show s no visible change.Cab le show s c lear arching a nd stretch marks and s ome da mage.Ca ble lad der show s insignifica nt deformation on s ide pieces andintermediate rungs.

8

7/24/2019 Smartcleat 2010 09x

3/4

What to expect from the tests:Would realistic tests done o n se veral ca ble lengths and clampdistances confirm the theory that the ca ble must be ad ditionallysec ured a t both ends to reduce arching and e liminate deformation

and stretch marks on the cable?Result of the test.By using a secure plate (rung reinforcing plate) at both ends of theca ble run it co nfirms: Less a rching on the c ab le. Less stretch at terminated ends significant point in regard to

functiona lity follow ing s hort circuiting . No stretch marks o n outer ca ble sheath. No stretch/deforma tion of rungs at the end o f the cab le la dd er.

In addition, the tests obtained important data for making the followingrecommendation conc erning ma ximum cleat spa cing, s ee ta ble 2.

The tests were ca rried out w ithout any da mag e to the ca ble, evenwhen using clamps two sizes too large w ith or without extra rubberinserts.

The tes t proced ure wa s s et up following dialogue w ith Draka Norsk

Kabel and a Sta toil representa tive.

Cross-section Short circuit Cleat spacing Commentscurrent

150 mm2 70kA 900 mm 77 mm a rching No da ma ge on la dder.

240 mm2

105kA 600 mm 35 mm a rc hing S ome d ama ge onside piece.

300 mm2 135kA 300 mm 7 mm a rc hing Diminutive d a ma g e o fside piece.

Cross-section Short circuit Cleat spacing Commentscurrent

150 mm2 70kA 900 mm 77 mm a rching No da ma ge on la dder.

150 mm2 87kA 600 mm (900)* 72 m m a rc hing (120m m)* No d a ma g e o fladder (Rung deform.)

240 mm2 109kA 600 m m (900)* 35 m m arch ing (125mm )* S om e d am age o f

side piece due to big ca ble arching.240 mm2 118kA 600 mm 35 mm a rching

300 mm2 135kA 300 mm (600)* 7 mm a rc hin g (74 mm )* Dim in ut ive d a ma g eof side piece and rung due to ca ble arching.

300 mm2 154kA 300 mm 7 mm a rc hing Diminutive d a ma g e.

* Figures in brac kets show tested spa cing/arching w ithout dama ge o f cleat or ca ble but not tobe recommended based on too much arching on the cable.

SmartCleat Summary from the IPH, Berlin, Germany test (2006):

Table 1 Recommended c lea t spa cing

Tes ted ca ble func tiona lity a nd rec ommended c lea t spa c ing

140A x 300 mm2

0.1 sec.

(sq uare root of the sho rt-circuit time)

Short-circuit level given by the formula (Example 300 mm2):

= 132kA ~ 135KA 150 mm2 = 70kA240 mm2 = 105kA300 mm2 = 135kA

These a re the values for the ba sis of the S martCleat tests .We ma ke the follow ing c lea t spa cing recommendations, s ee ta ble 1.(Thes e a re maximum loa d reco mmenda tion.)For more deta iled va lues, please see tab le 2.Please note that the ca ble tested w as a Draka c able RFOU.

In order to set realistic maximum test values for the most commonca ble cros s -sec tions 150/240/300 mm2, we c hose to us e a formulafrom NEK 606 which gives values as recommended in EN 50368.The formula sta tes w hat is ma ximum sho rt-circuit current for a c ab lewithout the c entre c ore bec oming so hot that it w eakens the insulationsheath ( 250 C).

Table 2 Recommended c lea t spa cing

C lam ping s pa ce 150/900/600/300 mm

Deflection of side piece

at 109kA with c-c 900 mm.(Not recommended see table 2).

According to the

test we stronglyrecommendSmartSecuringP la t e t o b eused at bothends of a trefoilcable run.See page 5.

9

7/24/2019 Smartcleat 2010 09x

4/410

Lateral Load TestRef: IEC 61914. Se ction 9.3.

What to expect from the test:

The ca ble c lea t sha ll be c a pa ble ofsuppo rting the latera l loa d.

Result of the test:

Maximum latera l loa d is 700 kg.

Axial Movement TestRef: IEC 61914. Se ction 9.4.

What to expect from the test:

The ca ble clea t sha ll be res ista nt to axialmovement.

Result of the test:

Maximum a xia l moveme nt loa d is 30 kg.

It is recommended to use a pa d(Art. no. 84038)in case of long vertical cable runs.

Impact TestRef: IEC 61914. Se ction 9.2.

What to expect from the test:

The ca ble cleat s hall be res ista nt toimpac t a t a mbient temperature.

Result of the test:

Impac t energy tes ted: 20 J .

Impact test classification: Very heavy.

Sma rt Cleat after 20 J impact tes t.Set up for Impac t test.

Set up for axial movement test

Set up for lateral loa d tes t

SmartCleat Summary from the Oglaend System R&D dpt., Klepp, Norway (2009):

Mec hanica l P roperties tes ted a ccording to IEC 61914