Medium voltage power cable for static application in ground, within and outside facilities, outdoor, in cable canals, in water, in conditions where cables are not exposed to heavier mechanical stress and tensile strain. Due to its very low factor of dielectric loss, which remains constant over its entire operating lifetime, and owing to excellent insulation property of XLPE-material, firmly longitudinally spliced with inner and external screen of semi-conductive material (extruded in one process), the cable has a high operating reliability. Used in transformer stations, switching blocks, in electric power plants and industrial plants. To avoid the effects of external impact, the adhering semi-conductive layer extruded between conductor and insulation, along with concentric copper conductor, secures restriction of electric field and resistance to partial discharges.

Standards

HRN HD 620 S1
IEC 60502-2
DIN VDE 0276 part 620

Construction

Conductor:	Cu round conductor, multi wire stranded compacted (RM), class 2
Inner screen:	extruded semi-conductive skin on conductor
Insulation:	XLPE (cross-linked polyethylene) compound
External screen:	extruded semi-conductive skin on insulation, longitudinally spliced with insulation (+ tape of conductive material)
Concentric conductor:	in inner layer corrugated spirally wrapped copper wires, in external layer copper tape wrapped in counter-helix
Separating	tape
Sheath:	PVC compound DMV-6 acc. to HRN HD 620 S1
sheath colour:	red

Technical data

Temperature range:
during installation:	-5 °C up to +70 °C
max. operating temp.:	+90 °C
at short circuit of max. 5 s:	up to 250 °C
Minimal inner bending radius:	15D

Dimensions – number of cores x conductor cross-section	Construction	Conductor diameter	Insulation thickness	External diameter	External diameter	Conductor resistance at 20 °C	Short circuit current 1s	Cu weight	Cable weight
18/30 kV
1 x 50/16	RM	8,6	8,0	33	38	0,387	7,15	662	1455
1 x 70/16	RM	10,2	8,0	35	40	0,268	10,0	854	1706
1 x 95/16	RM	12,0	8,0	36	41	0,193	13,6	1094	2001
1 x 120/16	RM	13,5	8,0	38	43	0,153	17,2	1334	2270
1 x 150/25	RM	15,0	8,0	39	44	0,124	21,4	1723	2650
1 x 185/25	RM	16,8	8,0	41	46	0,0991	26,5	2059	3022
1 x 240/25	RM	19,2	8,0	43	48	0,0754	34,3	2587	3618
1 x 300/25	RM	21,6	8,0	46	51	0,0601	42,9	3163	4350
1 x 400/35	RM	24,6	8,0	49	54	0,0470	57,2	4234	5350
1 x 500/35	RM	27,6	8,0	52	57	0,0366	71,5	5194	6450
1 x 630/35	RM	31,5	8,0	57	62	0,0283	90,1	6395	7800

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