id-Technik KR Series Cable Clamps

KR Series Cable Clamps | id Technik

CABLE CLAMPS | KR SERIES

id-Technik KR 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 KR 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 KR 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

KR Series Cable Clamp

KR 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 KR Series Dimensions

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

Type	D_Ø	D_Ø++	L	L₁	B	b	I	H₁	H₂	h	a	d_Ø	Screw thread
KR 75/100	75-100	70-95	180	172	77	44	150	71-97	109-134	52	17	14	M12
KR 100/130	100-130	95-125	210	197	97	54	175	99-129	140-170	69	20	14	M12
KR 130/160	130-160	125-155	250	213	97	54	210	116-146	176-206	87	23	18	M16
KR 160/200	160-200	155-195	290	258	120	60	250	172-212	230-270	113	35	18	M16
KR 200/250	200-250	195-245	340	300	120	61	300	190-240	280-330	130	40	18	M16

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

KR series cable clamps dimensions technik

KR Series Dimensions

Tightening torque for fixing material – Top part: 8 Nm^**,Bottom part: 20 Nm
Dynamic Resistance to short circuits – 30.000 N
Applications – Fastening of single- and multi-core cables for high short circuit fores. Universal application indoors and outdoors between -60°C and +120°C. Fastening in single, parallel and bundled formation.
Outer Diameter of Cables – 70 mm to 250 mm

Features of KR 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 – KR 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	18.000 N 15.000 N
Axial load test (N) – with Elastic Inlays	+120°C	1.500 N
Resistance to electrodynamic forces [N] suited to withstand multiple short circuits	Peak short circuit current: 181 kA Cable Clamp spacing: 1,10 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 KR 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

KR 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*
KR 75/100	75-100 mm	100 x 100 mm	70-95 mm	M12	120 mm + x
KR 100/130	100-130 mm	100 x 100 mm	95-125 mm	M12	152 mm + x
KR 130/160	130-160 mm	150 x 140 mm	125-155 mm	M16	175 mm + x
KR 160/200	160-200 mm	150 x 140 mm	155-195 mm	M16	243 mm + x
KR 200/250	200-250 mm	150 x 140 mm	195-245 mm	M16	270 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 KR 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.

KR Series Mounting Types

Bundling

Suitable for bundled fastening of multiple cables with different cable outer diameters

KR Series Bundling

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 KR 75/100, KR 100/130
Elastic Inlay 150 mm x 140 mm for KR 130/160, KR 160/200, KR 200/250

Elastic Inlays

Use with three Elastic Inlays

KR Series Elastic Inlays

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).