The Kelvin clamp 25 A type Crocodile from Chauvin Arnoux is a specialised measuring accessory for precise resistance measurements, particularly in industrial electrical engineering. The product consists of a cable with integrated crocodile clamps designed according to the Kelvin principle, enabling reliable and interference-free measurement of very low resistances. The clamp is rated for a maximum current of 25 amperes and is typically used in conjunction with machine controls and micro-ohmmeters where high measurement accuracy at low resistances is required.

Applications
The Kelvin crocodile clamp is used in the maintenance and servicing of electrical installations, particularly for testing switchgear, power switches, cable connections, and other components with low resistances. It is used to check contact resistances, transition resistances, or the quality of connections. The cable connection allows for flexible handling and a secure connection to the measuring device, enabling measurements even at hard-to-reach locations.

Features and Equipment in Detail
The clamp is designed as a crocodile clamp, allowing for simple and quick attachment to metallic surfaces. The Kelvin technique ensures that the measuring current and the voltage sensor are separated, thus avoiding measurement errors caused by the resistance of the connecting leads. This is particularly important for measurements in the micro-ohm range, where even small additional resistances can significantly distort results. The cable has a length of 2.5 metres, providing sufficient reach for most application scenarios.

Technology Explained Simply
The Kelvin measurement method is based on the separation of current and voltage leads. While the current flows through two conductors, the voltage is measured at two separate points directly connected to the point being measured. This eliminates the influence of lead resistances. The crocodile clamp enables a mechanically stable and electrically reliable connection, suitable for measuring resistances in the range of micro-ohms to milli-ohms. The maximum current rating of 25 A ensures safe operation even under higher loads.

Compatibility and Accessories
The clamp is designed for use with micro-ohmmeters and machine controls that support Kelvin measurements. It is supplied as a single unit and can be combined with appropriate measuring instruments to perform precise resistance measurements.

Installation and Mounting
Mounting is done by simply connecting the crocodile clamps to the point to be measured. The cable connection allows for flexible positioning of the measuring device. No special tools or additional mounting components are required. The clamp is designed for direct use without additional preparation or mounting steps.

individual cables with crocodile clamps designed according to the Kelvin principle, enabling reliable and interference-free measurement of very low resistances. The clamp is rated for a maximum current of 25 amperes and is typically used in conjunction with machine controls and micro-ohmmeters where high measurement accuracy at low resistances is required.

Operational Advantages
The combination of Kelvin technology and crocodile clamp provides high measurement accuracy at low resistances, thereby increasing the reliability of measurement results. The 2.5 m cable connection allows for flexible handling and a secure connection to the measuring device, enabling measurements even at hard-to-reach locations. The clamp is robust and designed for use in industrial environments, with a maximum current rating of 25 A ensuring safe operation even under higher loads.