Type Trommel-Flex (KSM-S) (N) SHTOEU Reeling Cable: A Flexible Power Solution for ERTGs

When it comes to powering Electrified Rubber Tyred Gantry Cranes (ERTGs) in demanding environments, choosing the right cable can make all the difference.

Today, we introduce Type Trommel-Flex (KSM-S) (N) SHTOEU Reeling Cable, designed specifically to handle high mechanical stress and extreme bending during reeling operations. This cable stands out as a reliable, flexible power solution that ensures smooth operation under intense working conditions.

In comparison to the Type Corda-Flex (SMK) (N) SHTOEU Reeling Cable, which also excels in ERTG applications, the Trommel-Flex brings unique features and enhanced performance, making it an ideal option for environments that demand high durability and flexibility.

Flexible Design for Tough Applications

The Type Trommel-Flex (KSM-S) (N) SHTOEU Reeling Cable is specially designed with flexibility in mind, tailored for high mechanical stress and high bending during crane reeling operations. With its robust structure, this cable ensures seamless power supply to ERTGs, handling constant movement without sacrificing performance.

What sets this cable apart is its ability to endure torsional stress and frequent directional changes, making it the perfect fit for crane drums that demand high levels of flexibility.

The Trommel-Flex features a wide-meshed polyester braid embedded in its sheath for torsion protection, ensuring that it withstands twisting and bending stresses during high-speed operations.

Explaining the Model Letters: What Does (KSM-S) (N) SHTOEU Mean?

Let's break down the key features behind the letters of this powerful cable:

KSM-S: Refers to the cable type and its design specifications. The "S" indicates a specialized design for high-stress environments, with a focus on mechanical strength and flexibility.

(N): Stands for compliance with DIN VDE standards, which ensures high quality and safety in electrical installations.

SHTOEU: This series of letters highlights the reeling capability of the cable, making it suitable for systems where continuous winding and unwinding occur, such as crane reeling operations.

These letters showcase the cable’s core features, ensuring customers that they are investing in a product that offers durability, flexibility, and high mechanical resilience.

Core Features: Designed for High Mechanical Stress

The Type Trommel-Flex cable is designed for environments that require high flexibility, especially in reeling systems where constant movement is a necessity. Below, we delve deeper into its critical design features:

Conductor: The Backbone of Power Transmission

The cable uses plain copper conductors of flexible Class 5 as per DIN EN 60228 / DIN VDE 0295. This ensures efficient power transmission, even under the mechanical strain of reeling operations.

Copper, being a highly conductive material, guarantees minimal power loss and optimum performance.

Insulation: Superior Protection and Durability

The insulation of the Type Trommel-Flex cable is based on a rubber compound type 3GI3, adhering to DIN VDE 0207-20 standards. This material enhances the cable's mechanical and electrical characteristics, offering robust protection in demanding working environments.

Core Identification: Precision and Ease of Use

For easy installation, the core identification follows DIN VDE 0293-308. This includes clearly marked optical fibers with 12 fibers of varying types—50/125µ, 62.5/125µ, or E9/125µ—all within a protection jacket.

These fibers ensure trouble-free data transmission, crucial for managing modern ERTG operations that require precise communication and control.

Fiber-Optic Element: High-Speed Data Transmission

Data transmission is vital for the smooth operation of ERTG systems, and the Trommel-Flex cable comes equipped with an optical fiber element. This feature ensures the reliable transfer of high data rates, which is essential in complex crane systems.

The cable's optical fibers offer outstanding attenuation values, minimizing signal loss:

At 850 nm: <2.8 dB/km (G50/125µ) or <3.3 dB/km (G62.5/125µ)

At 1300 nm: <0.8 dB/km (G50/125µ) or <0.9 dB/km (G62.5/125µ)

For monomode fibers, the attenuation reaches <0.4 dB/km at 1300 nm and <0.3 dB/km at 1550 nm, providing excellent clarity in communication channels.

Inner and Outer Sheath: Durability and Flexibility

The inner sheath of the cable is crafted from rubber compound type 5GM3, per DIN VDE 0207-21 standards, offering enhanced abrasion resistance and tear resistance. This ensures the cable maintains integrity under mechanical stress, preventing damage during operations.

The outer sheath, made of extruded rubber compound type 5GM5, adds another layer of protection. This outer layer is resistant to oil, flames, and harsh environmental conditions, making it ideal for use in indoor and outdoor applications. The black color also provides UV protection.

Electrical Parameters: Reliable Power Transmission

Rated at 0.6/1 kV (600/1000V), this cable is designed to handle high voltages while maintaining safety. Its AC test voltage for the main cores is 2.5 kV for 5 minutes, ensuring it meets stringent safety requirements. With a current carrying capacity according to DIN VDE 0298-4, this cable is well-suited for heavy-duty power transmission in demanding crane operations.

Mechanical Performance: Built to Last

In terms of mechanical stress, the Trommel-Flex stands out. Its max tensile load on the conductor is 20 N/mm², allowing it to withstand high levels of mechanical strain.

With a torsional stress rating of +/- 50 °/m and a minimum bending radius based on DIN VDE 0298 Part 3, the cable is flexible enough to endure high-speed reeling operations of up to 180 m/min.

Thermal and Chemical Resistance

The Trommel-Flex cable can operate in extreme temperatures, with a maximum conductor operating temperature of 90°C and a short-circuit temperature of 250°C. It can function in ambient temperatures ranging from -40°C to +80°C, ensuring versatility across different environments.

Additionally, the cable is oil-resistant per EN 60811-404, making it suitable for use in industrial settings where exposure to oils and chemicals is common. The cable's fire performance meets IEC 60332-1 (EN 50265-2-1) standards, providing peace of mind in case of fire hazards.

Comparing Trommel-Flex to Corda-Flex

While both the Trommel-Flex (KSM-S) (N) SHTOEU and Corda-Flex (SMK) (N) SHTOEU are designed for ERTG applications, there are some key differences:

Flexibility: The Trommel-Flex is designed for higher bending stress and torsional movement, making it more suitable for reeling drum systems that require frequent directional changes.

Optical Fiber Capacity: The Trommel-Flex offers 12 fibers for data transmission, whereas the Corda-Flex focuses more on power transmission with less emphasis on integrated communication capabilities.

Tensile Strength: The Trommel-Flex features a higher tensile strength of 20 N/mm², compared to the 30 N/mm² tensile load of the Corda-Flex, making it more robust for continuous mechanical stress.

Our Long-Term Collaboration with Shanghai Zhenhua Heavy Industries

We are proud to have a long-term partnership with Shanghai Zhenhua Heavy Industries Co., Ltd. (ZPMC), the world's largest manufacturer of gantry cranes.

Together, we ensure that our cables meet the rigorous demands of the global ERTG industry. Through close communication, we continuously develop and improve our products to meet the latest standards and operational needs.

Factory-Direct Sales and Customization Options

As a direct manufacturer, we offer not only competitive pricing but also customized solutions to meet your specific needs. Our factory, located in Hefei, Anhui, is equipped with state-of-the-art production lines and benefits from China's cost advantages in raw materials, labor, and land.

With partnerships with institutions such as the University of Science and Technology of China and the Shanghai Cable Research Institute, we provide full technical support for all of your cable needs.

Our commitment to quality, flexibility, and durability makes the Trommel-Flex (KSM-S) (N) SHTOEU the ideal choice for ERTG crane operations, ensuring safe, reliable, and efficient power and data transmission. Our cables are indeed worth the investment for your ERTG needs.

Note: This is just part of the standard parameters of our products. Please contact our Engineer if you need more. And the information contained within this webpage is for guidance only and is subject to change without notice or liability. All dimensions and specifications are nominal and are subject to normal manufacturing tolerances. All pictures shown are for illustration purposes only. The actual product may vary. All the information is provided in good faith and is believed to be correct at the time of publication.