CHKCU Kiosk Substation Cable 6/10-12.7/22-20/35kV

CHKCU Compact Kiosk Substation Cable

The CHKCU family is a single-core screened rubber cable to DS 076-2004, built for the short, tightly routed connections inside compact kiosk substations. Three rated voltages share the construction: 10-CHKCU at 6/10 kV, 22-CHKCU at 12.7/22 kV and 35-CHKCU at 20/35 kV, tested at 17 kV, 29 kV and 50 kV respectively.

The reason these are specified by name rather than as a generic switchgear cable is the combination of 12.7/22 kV system matching with the bending space inside a kiosk enclosure. The permissible bending radius is five times the cable diameter, and ten times below −20 °C, which is what governs whether a run will physically land on its terminal inside the housing.

• Rated voltages: 6/10 kV, 12.7/22 kV and 20/35 kV.
• Construction: single-core, screened, with concentric conductor and chloroprene sheath.
• Bending radius: minimum 5 × D; 10 × D below −20 °C.
• Temperature: −35 °C laying, handling and storage; +90 °C conductor.

The cables suit fixed and flexible installation in networks at these voltages, and are particularly suited to compact kiosk substations. For the German-standard single-core range from 3.6/6 kV to 18/30 kV see NTMCGCWÖU single-core cable, and for 26/45 kV switchgear connection see NTMCWOEU switchgear cable.

CHKCU Cable Construction

Seven-layer single-core screened construction, common to all three voltage ratings. The insulation wall changes with the rating; the layer sequence does not.

Family members

CHKCU Applications

CHKCU cables are for fixed and flexible installation in networks rated 10, 22 and 35 kV, and are especially suited to compact kiosk substations where a medium-voltage single core has to be routed and terminated in a confined enclosure.

• Compact kiosk and packaged substations at 10, 22 and 35 kV.
• Connections between ring main units, transformers and switchgear inside the housing.
• Runs where the 5 × D bending radius determines the routing inside the enclosure.
• Installations in cold conditions where the 10 × D limit below −20 °C applies.

Application boundaries

The bending radius is a minimum: 5 × D is the smallest radius the cable may be bent to, and 10 × D applies below −20 °C. Inside a kiosk enclosure that limit, rather than the current rating, usually decides the routing.

Related single-core medium-voltage references

Compare NTMCGCWÖU for the 3.6/6 kV to 18/30 kV German-standard single-core range and NTMCWOEU switchgear cable for 26/45 kV equipment connection.

Reference note: enquiries arriving marked 10-CHKCu, 22CHKCu or 35-CHKCu are handled on this page; spacing and capitalisation variants refer to the same family.

CHKCU Specifications

22-CHKCU 12.7/22 kV size and electrical table

The notation 1 × 35/16 means a 35 mm² conductor with a 16 mm² concentric conductor. The tabulated bending radius is the 5 × D value for each diameter. The 10-CHKCU 6/10 kV and 35-CHKCU 20/35 kV builds are available to order with a minimum order quantity. Their insulation wall differs from the 12.7/22 kV table above, so their dimensions are quoted per build.

CHKCU Standards, Approvals and Order Documentation

Approvals

Order package

State the system voltage and which family member is required, conductor and concentric conductor cross-sections, the kiosk or switchgear type and its entry arrangement, termination type, required lengths, and the partial discharge and documentation scope. Minimum order quantities apply to the 10-CHKCU and 35-CHKCU builds.