id-Technik KH Series Cable Clamps

KH Series Cable Clamps | id Technik

CABLE CLAMPS | KH SERIES

id-Technik KH Series Cable Clamps are suitable for use with all types of single and multi-conductor HV, MV and LV power cables in indoor and outdoor applications – typically used to clamp and support MV HV power cables in the offshore wind industry including wind turbine generators, masts and shafts applications.

The cable clamps are designed to withstand the toughest environments and are resistant to UV radiation and exposure to chemicals.

The excellent material in id-Technik Clamps is non-toxic, not harmful to health, fully recyclable, self-extinguishing and low-smoke and zero halogen (LSZH). It is compliant with directive 2015/863/EU (RoHS) and regulation (EC) no. 1907/2006 (REACH regulation). The material is also non-metallic, non-magnetic and corrosion-resistant – it does not interact with the cable’s electromagnetic field.

Unlike metal cable cleats or clamps, no additional polymer coating is needed to protect the cable against mechanical damage, and KH series clamps do not need to be earthed.

Cable Clamps & Cleats | id Technik cable clamps are specified extensively to provide cable support to both onshore, offshore and subsea wind farm power cables in both single or trefoil arrangement – this includes 11kV / 33kV substation, inter-array and associated medium or high voltage cables.

➡ Read our Blog | IEC 61914 – Cable Cleats & Short Circuit Protection Calculations

id-Technik Cable Clamps are type-tested by accredited test institutes for the highest classification to the international standard IEC 61914.

id Technik KH Series Cable clamps – Technical Specification

Resistance	Ultraviolet rays, ozone, mineral oils, fuels, salts, alkalis, alcohol, hydrocarbons, ketones, ether, termites and radioactive rays

Flame resistance	UL94 5VA (IEC 60695-11-20) UL94 V-0 (IEC 60695-11-10) IEC 61914 following IEC 60695-11-5 Classification following DIN 5510, part 2 Flammability class: S3

Thermal expansion	0.01% per 10°C temperature increase

Tensile strength	120 N/mm²

Flexural strength	210 N/mm²

KH Series Cable Clamp

KH Series Cable Clamps Temperature Range

Ambient temperature	down to -60°C^*

Continuous operation	up to 120°C

Permitted short-term heating	up to 220°C

Operation life	more than 40 years of maintenance- and failure-free operation

Technik Cable Clamps KH Series Dimensions

The below table shows the dimensions in mm for KH Series Cable Clamps.

Type	D_Ø	D_Ø+++	L	B	I	H₁	H₂	h	a	d_Ø	Screw thread
KH 62/75	62-75	59-72	225	90	185	114-142	172-200	80	30	18	M16
KH 73/86	73-86	70-83	250	100	210	119-147	192-220	85	30	18	M16
KH 84/97	84-97	81-94	270	100	230	128-156	214-242	95	30	18	M16
KH 95/107	95-107	92-104	290	100	250	136-164	244-262	103	30	18	M16
KH 105/117	105-117	103-114	310	100	270	144-178	248-282	108	30	18	M16
KH 115/140	115-140	112-137	365	120	320	182-242	270-330	145	35	18	M16
KH 138/165	138-165	135-162	500	140	420	215-310	295-390	165	40	20	M18

D_Ø: Outer cable diameter
D_Ø+++: ~ with three Elastic Inlays

kH series cable clamps dimensions technik

KH Series Dimensions

Tightening torque for fixing material – Top part: 8 Nm^**,Bottom part: 15 Nm
Dynamic Resistance to short circuits – 30.000 N
Applications – For trefoil formation of single- and multi-core cables. Universal application indoors and outdoors between -60°C and +120°C.

Features of KH Series Clamps

High mechanical strength and heat resistance due to special fibreglass-reinforced polyamide.
Safe restraint of dynamic forces of high short circuit currents, without damage to the cables – also for multiple short circuits
Type-tested to IEC 61914
Very low surface pressure on cables due to Cable Clamps’ large contact area
Unrestricted application both indoor and outdoor in extreme climates such as deserts, tropics, high altitudes, arctic climate, coastal salt fogs, flooding and ozone due to special resistance to ageing, ultraviolet rays and ozone
Easy to mount without special instruments and maintenance-free
Fastening of Cable Clamps adaptable to all local conditions

IEC 61914 Type-Tests – KH Series Clamps

Classification	Test Conditions	Approved Results
Material: non-metallic	high-grade polyamide
Operating temperature	-60°C / +120°C	passed
Resistance to impact	-60°C, 5 kg at 400 mm height	very heavy
Lateral load test (N) – in x-direction – in y-direction	At +120°C	35.000 N 35.000 N
Axial load test (N) – with three Elastic Inlays	+120°C	1.500 N
Resistance to electrodynamic forces [N] suited to withstand multiple short circuits	Peak short circuit current: 149 kA Cable Clamp spacing: 0,90 m	30.000 N
UV-resistance	high	passed
Flame propagation	1 x 30s, needle flame method	passed
	2 x 10s, 50 W test flame method	V-0
	5 x 5s, 500 W test flame method	5VA
	3 min	S3

Assembly Instructions For KH Series Clamps

Selection of fastening material

Material and corrosion resistance
The choice of material for the fasteners is dependent on the installation environment and operating conditions (e.g. galvanised, stainless steel, etc.), strength grade 4.8 – 8.8

Fastener diameter
depends on the Cable Clamp (dimension: metric screw thread [M])

Type of screw
depends on the substructure (e.g. hexagon screws, T-head screws, rod threaded, etc.); not included in delivery

Fastener Length
depends on the Cable Clamp dimension and type of substructure

Application with Elastic Inlays
on-site fixing with any form of adhesive (e.g. glue, silicone or paste) will void the warranty immediately

KH Series Individual Components

Cable Clamp type	Outer diameter of cable	Dimension Elastic Inlays	Outer diameter of cable with Elastic Inlays	Metric screw thread (M)	Recommended length of thread*
KH 62/75	62-75 mm	100 x 100 mm	59-72 mm	M16	170 mm + x
KH 73/86	73-86 mm	100 x 100 mm	70-83 mm	M16	175 mm + x
KH 84/97	84-97 mm	100 x 100 mm	81-94 mm	M16	185 mm + x
KH 95/107	95-107 mm	100 x 100 mm	92-104 mm	M16	197 mm + x
KH 105/117	105-117 mm	100 x 100 mm	102-114 mm	M16	210 mm + x
KH 115/140	115-140 mm	150 x 140 mm	112-137 mm	M16	270 mm + x
KH 138/165	138-165 mm	150 x 140 mm	135-162 mm	M18	340 mm + x

* For maximum permitted outer cable diameter (can be reduced accordingly for smaller diameters)
x corresponds to the height of the substructure

It is essential to respect the specified tightening torques, especially for the upper part, to guarantee perfect and reliable functioning of the cable installation for the long-term.**

Mounting

Each KH Series Clamp has a simple design, consisting of two sections. These components are secured together by fasteners; which also provide the attachment to the structure.

Thanks to the versatile range of attachment options, Clamp installation methods can be easily adapted to suit local circumstances – and the lower section can be pre-installed for ease of installation. There are no special tools needed to install id-Technik cable clamps.

KH Series Mounting Types

Use of Elastic Inlays

Elastic Inlays can be used as a cushion for elastic adjustment of cable diameter changes due to operational load changes and/or changes in the ambient temperature
Precise cable fixation and absorption of weight forces, primarily on cables installed along inclines or attached to vertical surfaces where restraint of axial movement is essential
Compensation of vibrations, e.g. in wind turbines, without reducing retention forces
Expansion of the Clamp’s clamping area, for cables with a smaller outer diameter
Elastic Inlay 100 mm x 100 mm for KH 62/75, KH 73/86, KH 84/97, KH 94/107, KH 105/117
Elastic Inlay 150 mm x 140 mm for KH 115/140, KH 138/165

Use with three Elastic Inlays

KH Series Elastic Inlays

Additional fixation of cables for high- and extra high-voltage in trefoil formation, especially with impregnated paper insulation and at vertical installations.

KH Additional Fixation

KH Installation

id-Technik was the first manufacturer to introduce a polyamide cable clamp to the world market offering an alternative to metal (aluminium or stainless steel) and wooden cable clamps. id-Technik distributes cable clamps for power cables of all voltage ranges (LV MV HV 1kV to 765kV).