PROTOLON(SC) 6/10 kV: Medium Voltage Cable for Shore-Connection Systems — An In-Depth Engineering Analysis for HVSC, Cold Ironing and Ship-to-Shore Power
PROTOLON(SC) 6/10 kV is a medium voltage flexible cable architecture for High Voltage Shore Connection Systems (HVSC), designed for both onboard vessel sections and onshore cable-handling systems. Based on DIN VDE 0250-813 and IEC/ISO/IEEE 80005-1, it combines 6/10 kV EPR-insulated power cores, semiconductive rubber field control, integrated control cores, optional fibre optics, an aramid-reinforced central support element, EPR inner sheath and an abrasion- and tear-proof CM/CPE outer sheath. Its technical role is not simply to transmit power: it must survive repetitive shore-connection handling, marine outdoor exposure, oil contamination, UV, ozone, moisture and permanent water immersion while maintaining electrical integrity, control-circuit reliability and safe operation around ships and quay equipment.
Definition and shore-power application
1. What is PROTOLON(SC) 6/10 kV?
PROTOLON(SC) 6/10 kV is a medium voltage shore-connection cable for High Voltage Shore Connection Systems, commonly searched by port engineers as HVSC cable, shore power cable, cold ironing cable, ship-to-shore power cable or IEC/ISO/IEEE 80005-1 shore connection cable. It is intended to supply vessels with electrical power from shore, reducing the need for shipboard auxiliary generation while the vessel is at berth.
The design is specified for both sides of the interface: onshore cable-handling systems and onboard vessel use. This dual role is important. A cable deployed only on a static quay route is one engineering problem; a cable repeatedly connected to vessels, reeled, dragged, exposed to salt water, flexed during operation and sometimes immersed is a much harsher system. PROTOLON(SC) addresses that use case through a three-core MV construction laid around a central aramid support element, with control cores for interlock and operation signals and optional fibre optics for communication requirements.
Technical thesis
Engineering argument: in a shore-connection cable, the decisive design problem is not only ampacity. The cable must combine medium voltage field control, flexible handling, tensile load management, marine chemical resistance, control-circuit integration and water exposure resistance in one cross-section. PROTOLON(SC) is therefore best understood as a system cable for ship-to-shore energy transfer, not as a general-purpose MV rubber cable repurposed for the quay.
1.1 Application profile decoded for port and vessel engineers
| Application dimension | Datasheet description | Engineering meaning |
|---|---|---|
| Cable category | Medium voltage cable for shore-connection systems | Designed for HVSC / shore power / cold ironing interfaces between quay supply and vessel intake. |
| Installation area | Onboard the vessel and onshore | One construction concept addresses both vessel-side and quay-side mechanical and environmental exposure. |
| Electrical duty | 6/10 kV rated voltage, 6.9/12 kV maximum AC operating voltage | Suitable for 10 kV class shore power distribution where project voltage coordination confirms the class. |
| Control function | Integrated control cores | Supports interlocks, pilot circuits, monitoring and operational signalling inside the same cable. |
| Data option | Up to 24 fibre optics, single-mode E9 or multimode G62.5 / G50 | Allows communication channels for vessel interface, monitoring and digital shore power systems. |
| Marine exposure | Outdoor / indoor use, ozone, UV, moisture and water resistance | Designed for quay, deck and terminal environments where weather and salt-water exposure are normal. |
| Water immersion | Suitable for permanent immersion in water | Critical for wet cable pits, quay trenches, deck flooding, splash zones and accidental submersion scenarios. |
| Mechanical handling | Static 20 N/mm², dynamic 25 N/mm² tensile load rule | Supports repeated handling and cable-management tension, with dynamic stress lower than high-speed crane reeling families. |
Standards and designation
2. Reading the Designation: PROTOLON(SC), (N)TSCGEWOEU and the HVSC Standard Context
The name PROTOLON(SC) identifies the shore-connection version of the medium voltage rubber cable family. The type designation (N)TSCGEWOEU follows the German VDE convention used for flexible heavy-duty rubber cables. In this article, the practical interpretation is focused on what harbour engineers and specification writers need to recognize when reviewing a shore-power cable schedule.
| Code or reference | Working reading | Engineering relevance |
|---|---|---|
| PROTOLON(SC) | Shore-connection product family | Indicates a cable architecture tailored for HVSC / ship-to-shore power systems. |
| (N) | Standards-derived German type convention | Signals the VDE-based design lineage for heavy rubber MV cables. |
| T | Flexible / movable duty context | Relevant to handled, reeled or repeatedly moved cable sections rather than purely fixed MV feeders. |
| S | Heavy-duty service | Points to robust rubber construction for severe mechanical and environmental service. |
| C | Protective conductor concept | Confirms the presence of a PE conductor system in the cable design. |
| G | Rubber insulation and sheath system | Connects the construction to EPR insulation and elastomeric sheath engineering. |
| EW / OE | Enhanced heat and oil resistance concept | Important for outdoor marine terminals with mechanical equipment, oils and heat exposure. |
| U | Flame propagation performance | Confirmed by DIN EN 60332-1-2 flame propagation testing. |
| DIN VDE 0250-813 | Design basis | Reference basis for the medium voltage rubber cable family. |
| IEC/ISO/IEEE 80005-1 | HVSC standard basis and additional test context | Connects the cable to the shore-connection system environment and the additional tests required for HVSC applications. |
Search-intent note for port engineers
Engineers may not search for the product code first. They often search by the system problem: 6/10 kV shore power cable, HVSC flexible cable, cold ironing medium voltage cable, IEC/ISO/IEEE 80005-1 cable, ship-to-shore connection cable with control cores or water-immersion shore connection cable. PROTOLON(SC) should be positioned around those search terms because they describe the real engineering decision.
Construction analysis
3. Construction Analysis: EPR Insulation, Semiconductive Field Control, Control Cores and Aramid Central Support
The cable construction is built around a three-core medium voltage design laid around a central support element. Compared with a generic flexible MV cable, the distinctive HVSC features are the combination of control cores, optional optical fibres, a tensile support element and a sheath system selected for marine outdoor exposure and water resistance.
Why aramid support matters in a shore-power cable
Engineering argument: shore-connection cables are often handled under conditions where pulling force does not act purely on copper conductors. Cable management systems, vessel movement, connection positioning and accidental snagging can introduce axial load. The central aramid support element gives the cable a dedicated tensile spine, reducing the tendency for conductor elongation, core displacement and internal fatigue during repeated connection cycles.
Electrical and thermal parameters
4. Electrical and Thermal Parameters: 6/10 kV, 21 kV AC Test Voltage and 90°C Conductor Operation
For HVSC engineering, voltage rating, operating voltage and test voltage must be read together. PROTOLON(SC) is rated at 6/10 kV, with a maximum permissible AC operating voltage of 6.9/12 kV and an AC test voltage of 21 kV. The current-carrying capacity is referenced to DIN VDE 0298 Part 4, while thermal limits are 90°C for continuous conductor operation and 250°C for short-circuit conditions.
| Electrical / thermal parameter | Value | Engineering interpretation |
|---|---|---|
| Rated voltage | 6/10 kV | Medium voltage class for HVSC shore power systems where 10 kV class supply is specified. |
| Maximum permissible operating voltage | 6.9/12 kV AC | Voltage coordination boundary for system design and insulation selection. |
| AC test voltage | 21 kV | Verification level for the medium voltage insulation system. |
| Current-carrying capacity | According to DIN VDE 0298 Part 4 | Final ampacity depends on conductor size, installation condition, ambient temperature and project derating. |
| Maximum conductor operating temperature | 90°C | Continuous thermal boundary of the EPR insulation system. |
| Maximum short-circuit conductor temperature | 250°C | Short-time thermal withstand boundary used in protection coordination. |
| Ambient temperature, fixed installation | -40°C to +80°C | Static cable sections and fixed route components. |
| Ambient temperature, fully flexible operation | -25°C to +80°C | Moving and handled operation boundary for flexible service. |
Medium voltage insight for HVSC
Engineering argument: a 6/10 kV shore-connection cable is part of a safety-critical interface between two electrical systems: the shore supply and the vessel network. The semiconductive field-control layers and EPR insulation must be treated as a medium voltage insulation system, while the control cores and optional optical fibres serve the operational interface. Selecting the cable by power current alone ignores the control and safety logic that makes HVSC operation possible.
Control and data transmission
5. Control Cores and Optional Fibre Optics: Why Shore Power Cables Need More Than Three MV Cores
Shore power is not only a power cable problem. Before medium voltage can be safely transferred, the system must know that the connection is correctly established, the earthing and interlock conditions are satisfied, the vessel and shore equipment are synchronized according to project logic and the cable is being handled within operating limits. This is why PROTOLON(SC) integrates control cores and allows optional fibre optics.
| Signal layer | Possible role in HVSC systems | Why integration matters |
|---|---|---|
| Power cores | 6/10 kV medium voltage energy transfer | Supplies the vessel from the shore distribution system. |
| PE conductor | Protective earthing path | Maintains the protective conductor function across the ship-to-shore interface. |
| Control cores | Interlock, permissive, monitoring and operating signals | Keeps safety and connection-status functions within the same cable route. |
| Single-mode E9 optical fibres | Longer-distance or higher-bandwidth data links | Useful where low attenuation, high bandwidth and network-backbone compatibility are required. |
| Multimode G62.5 / G50 fibres | Shorter-distance data links | Suitable for project architectures using multimode transceivers and short optical paths. |
5.1 Single-mode E9 vs multimode G62.5 / G50 in shore-connection projects
The datasheet allows single-mode E9 or multimode G62.5 / G50 fibre options. The selection should follow the communication architecture of the berth and vessel interface. For long-term port infrastructure, single-mode E9 is often preferred where direct compatibility with terminal fibre backbones and future bandwidth upgrades are priorities. Multimode options can be suitable where the optical path is shorter, the transceiver ecosystem is already standardized and the project deliberately limits the network distance.
| Criterion | Control cores | Multimode fibre G62.5 / G50 | Single-mode fibre E9 |
|---|---|---|---|
| Main function | Discrete electrical control and interlock signals | Optical data over shorter links | Optical data over longer or backbone-connected links |
| EMI immunity | Limited by electrical signalling design | High | High |
| Bandwidth growth path | Limited | Moderate, distance dependent | Strong for future upgrades |
| Best use case | Safety loops, permissives, status signals | Short local communication paths | Terminal backbone, higher bandwidth, longer berth infrastructure |
| Integration value | Reduces separate pilot/control cable routes | Reduces separate communication cable routes | Provides a future-oriented data channel in the shore cable system |
Marine chemical and environmental resistance
6. Chemical and Environmental Performance: Flame, Oil, Ozone, UV, Moisture and Permanent Water Immersion
HVSC cables operate in an environment where marine exposure and industrial exposure occur together. A quay-side cable may see sunlight, salt mist, standing water, deck wash-down, oil contamination, mechanical abrasion, cable pits, rollers and repeated handling. PROTOLON(SC) addresses this through flame propagation testing, oil resistance according to DIN EN 60811-404 / DIN VDE 0473-811-404 paragraph 10, unrestricted indoor and outdoor use, resistance to ozone, UV and moisture, water resistance and stated suitability for permanent immersion in water.
| Environmental property | Specified status | Engineering value in shore-connection systems |
|---|---|---|
| Flame propagation | DIN EN 60332-1-2 | Important for vessel-side and terminal-side cable routes where flame spread must be limited. |
| Oil resistance | DIN EN 60811-404 / DIN VDE 0473-811-404, para. 10 | Protects the sheath from hydraulic oil, fuel-related contamination and machinery oils on decks and quays. |
| Weather resistance | Unrestricted outdoor and indoor use | Supports open berth, shore cabinet, deck and cable-handling exposure. |
| Ozone resistance | Resistant | Reduces cracking risk near electrical equipment and outdoor atmospheres. |
| UV resistance | Resistant | Protects outdoor cable sections from sunlight ageing. |
| Moisture resistance | Resistant | Required for humid marine air, spray and wet operation. |
| Water resistance | Water resistant | Supports wet cable routes and marine handling conditions. |
| Permanent water immersion | Suitable | Critical differentiator for cable pits, deck flooding, quay trenches and harsh marine installations. |
| Outer sheath | CM/CPE abrasion- and tear-proof rubber compound | The main wear layer against dragging, roller contact, quay surfaces and mechanical handling. |
Why permanent immersion is a differentiator
Engineering argument: many industrial flexible cables can tolerate rain or splash, but shore-connection systems face a higher bar. A cable can lie in a wet pit, pass through flooded route sections, be exposed to deck wash-down or experience accidental immersion near the berth. The stated suitability for permanent water immersion therefore changes the risk assessment: water exposure is not treated as an abnormal event only, but as a design condition that the cable must withstand.
Mechanical parameters
7. Mechanical Parameters: Static 20 N/mm², Dynamic 25 N/mm² and Bending Radius Verification
PROTOLON(SC) uses a maximum tensile load rule of 20 N/mm² static and 25 N/mm² dynamic, referred to the conductor. Minimum bending radii are according to DIN VDE 0298 Part 3. The dynamic tensile rule is lower than the 30 N/mm² value often seen in high-speed gantry reeling cable families, which is consistent with a shore-connection use case focused on handled, connected and marine-exposed duty rather than high-speed crane travel.
| Mechanical item | Value / rule | Engineering interpretation |
|---|---|---|
| Static tensile load | 20 N/mm² | Used for normal sustained tension checks and cable management system design. |
| Dynamic tensile load | 25 N/mm² | Used for handling events, movement, connection cycles and transient pulling forces. |
| Bending radii | According to DIN VDE 0298 Part 3 | Reel, guide, tray, pit and vessel interface geometry must be checked against cable OD and bending class. |
| Central support | Aramid yarns with rubber covering | Improves tensile load management and stabilizes the three-core geometry under handling stress. |
| Outer sheath | Abrasion- and tear-proof CM/CPE compound | Protects against dragging, edge contact and quay-side mechanical wear. |
| Flexible temperature range | -25°C to +80°C | Movement and connection handling should remain within this boundary. |
Shore-connection handling is different from gantry reeling
Engineering argument: an STS or gantry reeling cable is optimized for high travel speed and continuous reel dynamics. A shore-connection cable is optimized for safe connection cycles, cable-management handling, vessel-side routing, water exposure and controlled tensile loads at the ship-to-shore interface. Treating these two cable duties as interchangeable is a specification error: both may be flexible MV rubber cables, but their stress profiles are not the same.
Comparative engineering view
8. Comparative Analysis: PROTOLON(SC) vs Standard Flexible MV Cable and vs High-Speed Reeling Cable
8.1 PROTOLON(SC) vs a standard flexible MV rubber cable
| Comparison item | Standard flexible MV cable | PROTOLON(SC) 6/10 kV | Engineering conclusion |
|---|---|---|---|
| System focus | General medium voltage power transmission | HVSC / shore power system interface | PROTOLON(SC) is specialized around ship-to-shore operation. |
| Standard context | May reference general cable standards only | Based on DIN VDE 0250-813 and IEC/ISO/IEEE 80005-1 | Better aligned with shore-connection system specification language. |
| Control cores | Not always integrated | Integrated EPR-insulated class 5 control cores | Supports interlocks and operational control in the same cable. |
| Optical fibres | Often absent or separate | Optional up to 24 fibres, E9 / G62.5 / G50 | Can incorporate communication channels without a separate communication cable. |
| Tensile support | May rely mainly on conductors and sheath | Central aramid support element with rubber covering | Improves axial load management during handling and connection cycles. |
| Water immersion | Often splash- or moisture-resistant only | Suitable for permanent immersion in water | Major advantage for marine shore power environments. |
8.2 PROTOLON(SC) vs high-speed gantry reeling cable
| Criterion | High-speed gantry reeling cable | PROTOLON(SC) shore-connection cable | What the difference means |
|---|---|---|---|
| Primary machine | STS, RMG, automated cranes, ship loaders | HVSC shore power systems onboard and onshore | Different stress pattern and system interface. |
| Dominant mechanical duty | High travel speed, torsion, reel cycling | Connection handling, tensile support, water and marine exposure | Selection must follow the real duty cycle, not just voltage rating. |
| Dynamic tensile rule | Often higher in high-speed reeling families | 25 N/mm² | Optimized for shore-connection handling rather than high-speed gantry travel. |
| Data function | Often fibre for automation and crane communication | Control cores and optional fibre for HVSC interface needs | Data and control are tied to safety and connection logic. |
| Environmental priority | Abrasion, torsion, rollers, outdoor weather | Marine weather, oil, water resistance, permanent immersion, handling | Water and shore-connection standards are central in PROTOLON(SC). |
Feichun Engineering View
For port electrification and cold ironing projects, PROTOLON(SC) should be specified as a dedicated 6/10 kV HVSC cable platform, not as a generic flexible MV feeder. Its strength is the complete interface package: class 5 bare copper conductors and PE conductor, EPR 3GI3 insulation, inner and outer semiconductive rubber field-control layers, integrated EPR-insulated control cores, optional fibre optics up to 24 fibres, a three-core layout around an aramid central support element, EPR GM1b inner sheath and a CM/CPE abrasion- and tear-proof outer sheath. The construction directly supports the application statement: onboard and onshore shore-connection use, wide vessel compatibility, control and optional data integration, marine weather resistance and permanent water immersion capability.
Selection framework
9. How to Select a PROTOLON(SC) 6/10 kV Class Shore-Connection Cable
Correct selection requires the project team to verify the electrical system, shore-connection standard context, control interface, mechanical handling method and marine environmental exposure together. The following framework can be used by port engineers, vessel electrical engineers, EPC contractors, shore power integrators and cable-handling system suppliers.
| Selection dimension | Data to confirm | Decision it drives |
|---|---|---|
| System voltage | Rated voltage and maximum operating voltage of the HVSC system | Confirms 6/10 kV class and 6.9/12 kV AC operating boundary. |
| Test requirement | Project test voltage and acceptance criteria | Confirms alignment with 21 kV AC test voltage. |
| Standard framework | DIN VDE 0250-813 and IEC/ISO/IEEE 80005-1 requirements in the project specification | Ensures the cable is specified in the correct HVSC context. |
| Load current | Vessel demand, duty profile, ambient temperature and installation method | Determines conductor cross-section and ampacity using DIN VDE 0298 Part 4. |
| Control interface | Number and function of control cores required | Defines interlock, pilot, permissive and monitoring circuits. |
| Optical communication | Whether fibre is required; E9, G62.5 or G50; fibre count up to 24 | Selects optional optical element and communication architecture. |
| Cable handling method | Reel, basket, tray, plug management, vessel-side route and quay-side route | Determines mechanical handling constraints and bending radius verification. |
| Tensile load | Static and dynamic pulling forces during connection cycles | Checked against 20 N/mm² static and 25 N/mm² dynamic rules. |
| Marine environment | Oil, UV, ozone, moisture, water exposure and immersion risk | Confirms suitability of CM/CPE sheath and permanent water immersion requirement. |
| Temperature | Minimum and maximum ambient conditions for fixed and moving sections | Checks -40°C to +80°C fixed and -25°C to +80°C fully flexible operation limits. |
Engineer FAQ
10. Frequently Asked Engineering Questions
Question 1 — What is PROTOLON(SC) 6/10 kV?
Answer: It is a medium voltage cable for High Voltage Shore Connection Systems. It is designed for onboard vessel and onshore shore-power use, with 6/10 kV rated voltage, EPR insulation, semiconductive rubber field control, integrated control cores, optional fibre optics, aramid central support and a marine-resistant outer sheath.
Question 2 — Is PROTOLON(SC) based on IEC/ISO/IEEE 80005-1?
Answer: The provided technical data states that the cable is based on DIN VDE 0250-813 and based on IEC/ISO/IEEE 80005-1, with additional tests according to IEC/ISO/IEEE 80005-1. This makes it suitable for HVSC specification language and shore-connection system engineering.
Question 3 — What makes it different from a normal 6/10 kV flexible cable?
Answer: The shore-connection design integrates control cores, optional fibre optics, an aramid central support element, marine environmental resistance and permanent water immersion suitability. These features address HVSC connection cycles, ship-to-shore interface control and harsh quay or vessel environments rather than only medium voltage power transmission.
Question 4 — Can the cable include fibre optics?
Answer: Yes. The design can integrate up to 24 fibre optics. The available optical options are single-mode E9 and multimode G62.5 or G50, allowing the cable to support communication requirements in addition to power, PE and control functions.
Question 5 — What temperatures apply?
Answer: The maximum operating temperature of the conductor is 90°C, with a maximum short-circuit conductor temperature of 250°C. Ambient temperature is -40°C to +80°C for fixed installation and -25°C to +80°C in fully flexible operation.
Question 6 — Is it suitable for permanent water immersion?
Answer: Yes. The application data states that the cable is suitable for permanent immersion in water, which is highly relevant for marine shore-connection environments, wet cable pits, quay-side systems and harsh outdoor installations.
Question 7 — What tensile limits should be checked?
Answer: The maximum tensile load on the conductor is 20 N/mm² static and 25 N/mm² dynamic. These values should be verified against the actual cable-handling method, connection cycle, support arrangement, pulling force and any movement during operation.
Question 8 — Which sheath material is used?
Answer: The inner sheath is a vulcanized EPR rubber compound, type GM1b according to DIN VDE 0207 Part 21. The outer sheath is an abrasion- and tear-proof high-grade rubber compound based on CM/CPE according to DIN VDE 0207 Part 21.
Final Engineering Summary
PROTOLON(SC) 6/10 kV is a specialized medium voltage shore-connection cable for HVSC systems, cold ironing and ship-to-shore power supply. Its engineering value lies in integrating the complete operating interface: 6/10 kV power cores, PE conductor, EPR 3GI3 insulation, semiconductive rubber field control, class 5 EPR-insulated control cores, optional fibre optics up to 24 fibres, three-core geometry around an aramid central support element, EPR GM1b inner sheath and CM/CPE abrasion- and tear-proof outer sheath. With 21 kV AC test voltage, 90°C conductor operation, 250°C short-circuit thermal limit, flame propagation performance, oil resistance, weather resistance, water resistance and permanent water immersion suitability, the cable is engineered for the real conditions of shore power: marine exposure, repeated handling, control interlocking, optional digital communication and safe medium voltage transfer between quay and vessel.
