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Product

CHKCU Substation & British MGM 109 / 118 Mining Feeders10-CHKCU · 22-CHKCU · 35-CHKCU6/10 kV · 12/20 kV · 18/30 kVClass 5 Tinned Cu · EPR / PCP

10-CHKCU / 22-CHKCU / 35-CHKCU CHKCU Compact-SubstationNF M 82-376 / IEC 60502-2 6/10 kV (10-CHKCU), 12/20 kV (22-CHKCU) & 18/30 kV (35-CHKCU)

10-CHKCU / 22-CHKCU / 35-CHKCU Compact-Substation Connection Cable is the French AFNOR NF M 82-376 / UTE C 33 flexible single-core medium-voltage elastomer jumper cable across 6/10(12) kV (10-CHKCU), 12/20(24) kV (22-CHKCU), and 18/30(36) kV (35-CHKCU)

Flame-retardant
EMC screen
Oil-resistant
Water-resistant
Order designation
10-CHKCU 6/10 kV 1 × 95 mm²
Outer Ø ≈
30.2 mm
Copper weight
1,110 kg/km
Total weight ≈
1,620 kg/km
Min. bend R (fixed)
181 mm
All sizes (7)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Voltage classes
10 / 20 / 30 kV
6/10 kV, 12/20(24) kV, 18/30(36) kV
Conductor
Class 5 Tinned
Flexible 16 mm² to 300 mm²
HV insulation
90 °C HV-EPR
Triple-extruded w/ semi-con screens
Metallic screen
Tinned Cu Braid
Flexible copper braid / helically lapped
Outer sheath
Heavy PCP / EM2
Oil-, ozone- & flame-retardant neoprene
Min. bend radius
6 × D / 8 × D
Tight MV kiosk & transformer bays

Typical values for this cable type, based on NF C 33-226 / NF M 82-376 / IEC 60502-2 (10-CHKCU / 22-CHKCU / 35-CHKCU) — confirmed in the datasheet and quotation for your order.

Application fit

Is 10-CHKCU / 22-CHKCU / 35-CHKCU right for your machine?

Engineered for ultra-short-radius MV jumpers between ring-main units (RMUs) and MV/LV transformers inside prefabricated compact substations (postes préfabriqués), mobile skid substations

Switchgear & control cabinet wiring

Suitable

6×D bending radius routes between RMU plug-in elbows (250 A / 400 A / 630 A) and transformer bushings in 1.5 m kiosks.

Fixed installation

Suitable

Replaces stiff Class 2 XLPE utility cables (15×D bend radius) inside modular container substations and wind towers.

Self-supporting pendant & push-button drop

Suitable

Serves as semi-mobile MV bypass and temporary transformer connection jumper on utility and quarry sites.

Energy chain / drag chain

Not suitable

Flexible fixed and semi-mobile MV jumper cable; not for high-speed linear drag chains.

BS 6883 Armoured MV
Typical machinesPrefabricated MV/LV compact substationsMobile skid & container substationsWind-turbine tower & nacelle MV dropsQuarry, tunneling & mine MV transformers

Construction

Layer by layer

Single-core Class 5 flexible tinned copper conductor (16 to 300 mm²), inner semi-conductive elastomer screen, 90 °C high-grade EPR

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Class 5 flexible tinned copperIEC 60228 Class 5 flexible annealed tinned copper conductor (16 to 300 mm²)IEC 60228 Class 5
2Triple-extruded Semi-Con + 90 °C HV-EPRInner semi-con elastomer + 90 °C high-modulus EPR (3.4 mm @ 10kV, 5.5 mm @ 20kV, 8.0 mmNF M 82-376 / IEC 60502-2
3Flexible tinned copper metallic screenTinned copper wire braid or composite helical wires + counter-helix tape (≥ 16–25 mm²CHKCU specification
4Separator tapeNon-woven / polyester binder tape over the copper screenIEC 60502-2
5Heavy-duty polychloroprene (PCP) sheathCross-linked oil-, ozone-, weather-, and flame-retardant polychloroprene elastomer (Black)EN 50363-2-1 EM2

10-CHKCU (6/10 kV, Um = 12 kV) & 22-CHKCU (12/20 kV, Um = 24 kV)

Standard 10 kV and 20 kV flexible single-core substation jumper cables (25 mm² to 240 mm²).

35-CHKCU (18/30 kV, Um = 36 kV)

30/33 kV flexible single-core jumper cable for wind-farm collector substations and 33 kV mobile transformers.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on NF C 33-226 / NF M 82-376 / IEC 60502-2 (10-CHKCU / 22-CHKCU / 35-CHKCU). Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U (Um)
10-CHKCU: 6/10(12) kV · 22-CHKCU: 12/20(24)
Routine 5-min AC test voltage
21 kV (10-CHKCU) · 42 kV (22-CHKCU) · 63 kV
Partial discharge (PD) level
≤ 10 pC at 1.73 × U0
Max. conductor operating temp.
+90 °C continuous · +250 °C short-circuit
Lightning impulse withstand
75 kV (10-CHKCU) · 125 kV (22-CHKCU) · 170

Thermal

Operating temperature range
-25 °C to +80 °C ambient (-40 °C fixed
Minimum installation temp.
-20 °C

Mechanical

Min. bending radius
6 × D fixed inside substation kiosk · 10 ×
Max. tensile pulling load
15 N/mm² of copper cross-section

Resistance

Oil & transformer fluid resistance
EN 60811-404 mineral oil & synthetic ester
Flame & ozone resistance
IEC 60332-1-2 flame retardant · EN

Reference standards

Primary specification
NF M 82-376 / UTE C 33 / IEC 60502-2
Separable connector fit
Fits 250 A, 400 A & 630 A EN 50180 / EN

Identification

Core & screen
Peelable black outer semi-con under bright
Outer sheath colour
Black (with longitudinal voltage &

Sizes

7 standard configurations (10-CHKCU / 22-CHKCU / 35-CHKCU)

Nominal dimensions, copper weights, DC resistance and current ratings for 10-CHKCU / 22-CHKCU / 35-CHKCU per NF C 33-226 / NF M 82-376 / IEC 60502-2 (10-CHKCU

Dimensions & weights
Order designationCores × SizeMain cross-sectionOuter Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard 10-CHKCU / 22-CHKCU / 35-CHKCU configurations
10-CHKCU 6/10 kV 1 × 35 mm²1 × 35 mm² (6/10 kV)35.0 mm²24.5495890147
10-CHKCU 6/10 kV 1 × 95 mm²1 × 95 mm² (6/10 kV)95.0 mm²30.21,1101,620181
22-CHKCU 12/20 kV 1 × 35 mm²1 × 35 mm² (12/20 kV)35.0 mm²28.85301,160173
22-CHKCU 12/20 kV 1 × 50 mm²1 × 50 mm² (12/20 kV)50.0 mm²30.56851,360183
22-CHKCU 12/20 kV 1 × 95 mm²1 × 95 mm² (12/20 kV)95.0 mm²34.61,1501,920208
35-CHKCU 18/30 kV 1 × 95 mm²1 × 95 mm² (18/30 kV)95.0 mm²40.21,2202,440241
35-CHKCU 18/30 kV 1 × 150 mm²1 × 150 mm² (18/30 kV)150.0 mm²44.01,7903,120264
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per NF C 33-226 / NF M 82-376 / IEC 60502-2 (10-CHKCU / 22-CHKCU / 35-CHKCU).

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
Routine HV AC test (21 / 42 / 63 kV) & PD test5 min AC withstand; partial discharge ≤ 10 pC at 1.73 U0100 % of drums
Class 5 tinned Cu & metallic screen DC resistanceIEC 60228 Class 5 R20; screen fault capacity verification100 % of drums
Sample tests
Outer semi-con peel force & HV-EPR hot-setClean cold-stripping for EN 50180/50181 separable connectorsPer production batch
BIL impulse + oil immersion + IEC 60332-1-2 flame75 / 125 / 170 kV impulse pass & EM2 oil resistanceType approval

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

NF M 82-376 / UTE C 33IEC 60502-2EN 50180 / EN 50181

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX 10-CHKCU 6/10KV / 22-CHKCU
Delivery form
Non-returnable timber drums or heavy export
Standard drum lengths
250 m · 500 m · 1000 m · custom cut lengths
MOQ
100 m (stock variants) · 500 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDF10-CHKCU / 22-CHKCU / 35-CHKCU CHKCU Compact-Substation – technical datasheet7 sizes · construction, technical data, approvalsXLSX10-CHKCU / 22-CHKCU / 35-CHKCU spec data (Excel)All 7 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What do the designations 10-CHKCU, 22-CHKCU, and 35-CHKCU mean?
Originating from French AFNOR NF M 82-376 / UTE medium-voltage standards, '10', '22', and '35' indicate the maximum system voltage class (6/10 kV, 12/20(24) kV, and 18/30(36) kV), while 'CHKCU' denotes a flexible copper conductor ('CU') with cross-linked elastomer ('C') insulation, semi-conductive/copper phase screening ('HK'), and a polychloroprene outer sheath.
Why is 22-CHKCU used inside compact prefabricated MV/LV substations instead of standard NF C 33-226 aluminum utility cable?
Inside a compact concrete or metal kiosk substation, the distance between the MV ring-main unit (RMU) and the transformer MV bushings is often less than 1.5 to 3 metres with tight 180° turns. Stiff solid-aluminum utility cables require a 15×D bend radius and apply excessive mechanical torque to 250 A plug-in bushings, whereas Class 5 flexible 22-CHKCU bends safely at 6×D.
Are CHKCU cables compatible with Euromold / Pfisterer 250 A and 400 A separable elbow connectors?
Yes. Both the triple-extruded HV-EPR insulation diameter and the strippable (peelable) outer semi-conductive layer of 10-CHKCU, 22-CHKCU, and 35-CHKCU are precision-extruded to fit standard EN 50180 / EN 50181 Interface A (250 A), Interface B (400 A), and Interface C (630 A) separable T-connectors and elbows.
Can CHKCU cables also be used as mobile MV emergency bypass jumpers?
Yes. Because CHKCU combines a Class 5 flexible tinned copper core, a flexible braided tinned copper screen, and a tear- and oil-resistant polychloroprene (PCP) rubber sheath, utility crews and quarries frequently use pre-terminated 22-CHKCU and 35-CHKCU reels as mobile MV transformer jumpers. Each production

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10-CHKCU / 22-CHKCU / 35-CHKCU CHKCU Compact-Substation

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