NKT CPI Branch Joint (JPI3-4W)
The JPI3‑4W is a new branch joint designed to enable ‘spider‑web’ configurations instead of the traditional daisy‑chain layout. This allows cables to be collected at the bottom of the terrain – instead of returning up to the next turbine – which means the routing is more direct and you need less cable.
The NKT JPI3‑4W branch joint is designed specifically for use with the CPI 3 inner cone connector from NKT.
Features
- Connect up to three strings per phase of turbines
- Combine or branch circuits efficiently
- Lay cables more directly across complex terrain
- Reduce total trenching and cable length
- Improve flexibility when designing the network
Basic informationType designation Branch joint / transition system Variant Interface 3 connection Applicable standards HD 629.1 + IEC 60840 | Contact systemBushing type Interface type 3
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Electrical routine test (internal)AC withstand voltage (1 min) 86 kV Partial discharge test < 10 pC at 42 kV X-ray 100 % | Cable connectionType CPI 3 and CPI 3XL Screen type CWS and CTS |
Mechanical protectionMaterial hardness > 80 Shore D Termite protection – Appl. Std. AS 3660.1 | Electrical test level of the type test(IEC 60840:2011+HD 629.1) AC withstand voltage (5 min) 93.5 kV LI withstand voltage 250 kV Heating cycles (AC voltage) 52 kV Partial discharge test < 10 pC at 42 kV |
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Electrical levels (IEC 60840)Rated voltage (Um) 52 kV Highest voltage phase to phase (U) 45…47 kV Rated design voltage to ground (U0) 26 kV | CurrentMax. current rating 1250A Max. thermal short circuit current (5s) 40 kA Max. dynamic short circuit current n.a. |
Stress controlField control method geometrical Type pre-moulded Material epoxy resin Production method vacuum casting | PackingType wooden box Scope of delivery 1 piece per wooden box Gross weight 1pc 30 kg Dimensions 1pc 450 x 370 x 200 mm |
NKT MV Cable Accessories Catalogue
Other literature available on request
Reports, drawings, technical data sheets, installation instructions, O&M guidelines
