1. Introduction to PROTOMONT NSSHOEU Cables

The PROTOMONT NSSHOEU series represents a category of heavy-duty, low voltage flexible rubber cables engineered specifically for demanding industrial environments. These cables are designed to provide reliable power transmission in applications where conventional cables would fail due to extreme mechanical stress, environmental exposure, or chemical contact.

The designation NSSHOEU follows German cable nomenclature standards where each letter indicates specific construction characteristics. The cables are manufactured according to DIN VDE 0250-812 specifications, which define requirements for rubber-insulated flexible cables used in power installations. According to industry standards, these cables are engineered for environments where high levels of mechanical stress and abrasion are expected, making them essential for modern mining, construction, and industrial operations.

As documented by Feichun Cables, these specialized cables meet the highest industry standards including AS/NZS 1802:2003, AS/NZS 2802:2000, VDE, ICEA, and CAN/CSA requirements, demonstrating their suitability for global mining and industrial applications.

2. Purpose and Applications

PROTOMONT NSSHOEU cables serve a critical role in powering equipment across various demanding industrial sectors. Their robust construction enables reliable operation in environments where standard cables would experience rapid degradation or failure.

2.1 Primary Application Areas

The cables are engineered for both flexible use and fixed installation in open-cast mining applications, quarries, construction sites, and similar environments with heavy mechanical stresses. Specific applications include indoor and outdoor installations, explosion-hazard areas, industrial facilities, and agricultural operations.

Mining and Quarrying Operations

In mining environments, these cables provide power to mobile and stationary equipment including continuous miners, drills, loaders, conveyors, and pumping systems. As noted by Amplex Mining, cables designed for Australian mining environments must meet stringent AS/NZS compliance requirements while delivering exceptional durability in harsh underground and surface conditions.

Submersible and Water Applications

A distinctive feature of PROTOMONT NSSHOEU cables is their exceptional water resistance capability. According to the manufacturer’s specifications, these cables can be used permanently in waste water up to 40°C at depths up to 2000 meters. They are also suitable for use in industrial water, cooling water, surface water, rainwater, mixed water, groundwater, and seawater to varying degrees depending on water composition.

Construction and Heavy Industry

Construction sites present unique challenges including physical abuse, exposure to oils and chemicals, and variable weather conditions. As documented by Reeling Cable, cables for mobile machinery must demonstrate high tensile strength, resistance to saltwater and UV radiation, and advanced insulation and sheathing to prevent wear and electrical degradation. The PROTOMONT NSSHOEU design addresses these requirements through its multi-layer construction and specialized compound formulations.

Crane and Material Handling Equipment

Crane and hoisting applications demand cables that can withstand continuous reeling, torsion, and mechanical stress. Technical sources indicate that crane cables must be simultaneously robust and flexible to ensure reliability under high mechanical loads including traction, compression, abrasion, bending, and torsion. The PROTOMONT NSSHOEU series meets these requirements with its Class 5 finely stranded conductor construction.

3. Key Characteristics and Performance Features

The PROTOMONT NSSHOEU cable incorporates multiple design features that enable superior performance in demanding environments. Each characteristic has been optimized through extensive engineering to address specific operational challenges.

3.1 Mechanical Properties

3.2 Environmental Resistance

The cable demonstrates comprehensive resistance to environmental factors that would degrade standard cables. Industry documentation confirms that EPR insulated cables are preferred for applications requiring excellent moisture resistance, flexibility, and ability to withstand harsh conditions, with applications ranging from marine platforms to underground mining operations.

3.3 Electrical Performance

The electrical characteristics of PROTOMONT NSSHOEU cables ensure reliable power transmission while maintaining safety margins for overcurrent and fault conditions.

4. Material Structure and Construction

The PROTOMONT NSSHOEU cable employs a multi-layer construction designed to optimize electrical performance, mechanical durability, and environmental resistance. Each component serves specific functions that contribute to overall cable reliability.

4.1 Conductor Construction

The conductor consists of electrolytic copper with tin plating, constructed in a finely stranded configuration conforming to Class 5 per DIN EN 60228 / IEC 60228. The tinning process provides corrosion protection while the fine stranding delivers superior flexibility for dynamic applications.

4.2 Insulation System

The insulation utilizes PROTOLON, an EPR-based compound designated as Type 3GI3 per DIN EN 50363. Ethylene Propylene Rubber (EPR) provides excellent electrical insulation properties combined with thermal stability and moisture resistance.

Technical documentation indicates that EPR insulation exhibits good resistance to water treeing, a phenomenon where water creates penetrating patterns through insulation that can eventually reach the conductor. EPR cables with ethylene-propylene copolymer construction offer low sensitivity to water treeing, making them ideal for offshore and outdoor applications in constant contact with water.

4.3 Core Identification

Core identification follows DIN VDE 0293-308 standards. Cables with up to 5 cores feature color-coded identification, while cables with 6 or more cores use light-colored insulation with black numbers for identification.

4.4 Inner Sheath

For multi-core cables, an inner sheath constructed from vulcanized rubber compound (EPR base material, GM1B type per DIN EN 50363) provides additional mechanical protection and maintains core positioning. Single-core cables do not incorporate an inner sheath.

4.5 Outer Sheath

The outer sheath consists of vulcanized rubber compound using synthetic elastomer (CPE – Chlorinated Polyethylene or equivalent), designated as Compound Type 5GM5 per DIN EN 50363. The standard color is yellow, providing high visibility in industrial environments.

5. Technical Specifications and Parameters

The following tables present detailed technical parameters for various PROTOMONT NSSHOEU cable configurations. Data is organized by core count and cross-sectional area to facilitate selection for specific applications.

5.1 Thermal Parameters

*Note: At higher water temperatures, shortened cable service life is to be expected.

5.2 Single-Core Cable Specifications (PROTOMONT NSSHÖU-0 1x)

5.3 Three-Core Cable Specifications (PROTOMONT NSSHÖU-1 3x)

Current carrying capacity based on rubber cables laid on surface at 30°C ambient temperature per VDE 0298-4, Table 15.

5.4 Electrical Parameters by Cross Section

6. Compliance Standards and Certifications

PROTOMONT NSSHOEU cables are manufactured in accordance with stringent international standards and hold multiple certifications validating their suitability for demanding applications worldwide.

6.1 Primary Manufacturing Standard

The cables are produced according to DIN VDE 0250-812, the German national standard that specifies requirements for rubber-insulated flexible cables NSSHÖU. According to Eland Cables, Germany is the only country to have issued special design regulations for flexible electrical cables covering cranes and material handling equipment, and DIN VDE 0250 has found global recognition as the standard for tough rubber sheathed flexible reeling cables.

6.2 Certifications and Approvals

6.3 Referenced Standards

7. Safety Thresholds and Operating Limits

Understanding and adhering to safety thresholds is critical for reliable cable operation and personnel safety. The following parameters define the operational boundaries for PROTOMONT NSSHOEU cables.

7.1 Voltage Limits

7.2 Temperature Limits

7.3 Mechanical Limits

7.4 Current Derating Factors

The nominal current carrying capacities specified assume cables laid on a surface at 30°C ambient temperature. When operating under different conditions, derating factors must be applied:

8. Installation and Usage Precautions

Proper installation and handling procedures are essential to maximize cable service life and maintain safe operation. The following guidelines address key considerations for various installation scenarios.

8.1 Installation Guidelines

Handling and Storage

• Store cables in a dry, clean environment away from direct sunlight when not in use
• Maintain storage temperature between -25°C and +50°C
• Avoid contact with sharp edges or abrasive surfaces during transport
• Do not drag cables over rough surfaces without protective measures

Installation Requirements

• Observe minimum bending radii specified in DIN VDE 0298 Part 3
• Provide strain relief at connection points to prevent conductor fatigue
• Ensure adequate support to prevent excessive cable sag
• Protect cables from mechanical damage in high-traffic areas

8.2 Submersible Installation Considerations

When installing cables for submersible applications, additional precautions apply:

• Verify water composition before installation; test cable resistance properties in aggressive water or water with special substances
• Ensure maximum water temperature does not exceed 40°C for rated service life
• Establish inspection schedule appropriate to water conditions
• Consider seawater and groundwater as having more limited suitability compared to freshwater applications

8.3 Explosion-Hazard Area Installation

8.4 Prohibited Applications

Per DIN VDE 0298 Part 3, PROTOMONT NSSHOEU cables are not suitable for:

• Direct burial in soil (without additional protection)
• Fixed installation behind fire-retarding seals or sand cups (except temporary covering at construction sites)
• Applications exceeding maximum voltage or temperature ratings
• Use without proper strain relief at mobile equipment connections

8.5 Inspection and Maintenance

Regular inspection ensures continued safe operation:

• Visually inspect cables regularly for cuts, abrasions, or deformation
• Check terminations for signs of overheating or loosening
• Test insulation resistance periodically per applicable standards
• Replace cables showing significant wear or damage
• Maintain documentation of inspections and test results

9. Technical Data Comparison Tables

9.1 Four-Core Cable Specifications (PROTOMONT NSSHÖU-1 4x)

9.2 Five-Core Cable Specifications (PROTOMONT NSSHÖU-1 5x)

9.3 Multi-Core Cable Specifications (7 to 24 cores)

9.4 Cables with Ground Conductor (3×…+3×…/3)

10. Frequently Asked Questions