General
Cable type	Coiled cable
Manufacturer	Lapp
Number of conductors	7
Core cross section	1 mm²
Wire identification	numbers
Insulating material	PUR
Operating voltage	300/500 V
Pull-out length	1700-5000 mm
Return force	particularly high
Temperature range	wide
Chemical resistance	mineral oil-based lubricants, diluted acids, aqueous alkaline solutions
Outer sheath colour	Signal colour

The spiral cable ÖLFLEX® SPIRAL 540 P 7G1/1700 from Lapp is a specially developed rubber hose cable with PUR insulation for dynamic and harsh operating conditions. It features a closed spiral structure that can be extended as needed and then returns to its original position due to high restoring forces. The cable is available in extension lengths from 1700 mm to 5000 mm and is particularly suitable for applications requiring a flexible yet robust connection between moving and stationary components, such as in machine building, construction, or medical devices.

Applications
This cable is designed for use in damp rooms and outdoors, making it suitable for outdoor installations as well. It is used in areas subject to high mechanical stress, chemical exposure, or extreme temperatures. The signal color of the outer sheath enhances visibility and improves recognizability in complex installations. The cable is especially suitable for applications requiring high service life and reliability under harsh conditions.

Functions and Equipment in Detail
The cable features 7 conductors with a cross-section of 1 mm² (7G1), each marked with numbers to enable clear identification. The PUR insulation provides high mechanical strength and resistance to mechanical stress such as pressure, friction, and torsion. The signal color of the sheath enhances visual perception and increases operational safety. The restoring forces are particularly high, ensuring reliable return to the original position.

Technology Explained Simply
The spiral structure of the cable allows an extension length up to 3.5 times the length of the closed spiral. This means the cable can be significantly extended when needed without losing its functionality. The restoring forces ensure the cable automatically returns to its original position after unloading. The operating voltage is U0/U: 300/500 V, which is sufficient for many industrial applications. The PUR sheath material is resistant to mineral oil-based lubricants, diluted acids, aqueous alkaline solutions, and other chemical agents, extending the service life under aggressive conditions. The temperature range is broad, allowing the cable to be used even in climatically harsh environments.

Compatibility and Accessories
The cable is suitable for use in machine building, construction, medical devices, and in damp or outdoor areas. It can be combined with appropriate connectors, cable lugs, or other connection components required for the specific application. The use of accessories depends on the specific application and the type of electrical connection.

Installation and Mounting
Mounting typically involves installing the cable into suitable guide rails or pipes that support its movement and protect it from mechanical damage. Installation requires careful planning of the extension length and mounting points to fully utilize the cable’s functions. The cable is designed for dynamic movements, with mechanical loads remaining within the specified limits.

Operational Advantages
The high restoring force and long service life under harsh conditions reduce maintenance frequency and increase operational safety. The chemical resistance of the PUR sheath protects the cable from wear caused by lubricants and other aggressive media. The signal color improves recognizability and contributes to safety. The cable is durable and suitable for applications requiring high reliability.