Chauvin Arnoux P01101794 Cable with Kelvin clamps 10 A (2 pcs) content_copy

This item is a set of two Kelvin test clamps, specifically developed for use with the micro-ohmmeters C.A 6240, C.A 6250, and C.A 6255 from the manufacturer Chauvin Arnoux. These clamps are designed for precise measurement of very low resistances, particularly in electrical engineering applications where high measurement accuracy is required. The Kelvin test clamps enable a four-wire measurement, in which the measurement current and the voltage measurement input are separated, to avoid measurement errors caused by the contact resistance of the connecting leads. This is especially important for resistances in the micro-ohm range, where even small additional resistances can significantly distort measurement results.

Applications

The Kelvin test clamps are designed for use in industrial electrical engineering, plant construction, and maintenance of electrical installations. They are suitable, for example, for testing switchgear, transformer connections, cable connections, screw connections, or other metallic connections, where low resistance is an important quality requirement. The clamps are rated for a maximum current of 10 A, making them suitable for typical tests in electrical installation and operational technology.

Functions and Equipment in Detail

The set consists of two identical Kelvin test clamps, each connected via a fork cable lug. This connection is made directly to the measuring instruments C.A 6240, C.A 6250, and C.A 6255, ensuring a secure and mechanically stable connection. The clamps feature an opening with a diameter of 42 mm, allowing connection to larger cables or terminal pins. The supplied connecting cable has a length of 3 m, providing sufficient reach for most tests in operational or workshop environments. The cable is flexible and allows easy handling during measurement.

Technology Explained Simply

The four-wire measurement, realized by the Kelvin test clamps, separates the current path from the voltage measurement path. The measurement current flows through two conductors (current supply and return), while the voltage is measured at two separate points on the test object. This eliminates the influence of the conductor resistance of the current-carrying wires on the measurement. This is crucial when measuring resistances in the micro-ohm range, as even a resistance of 100 µΩ due to a poor contact connection can already distort the measurement. The Kelvin test clamps are therefore an essential component for achieving high measurement accuracy.

Compatibility and Accessories

The clamps are exclusively intended for the micro-ohmmeters C.A 6240, C.A 6250, and C.A 6255. Compatibility is based on the connection via fork cable lugs, which are provided on the respective measuring instruments. The clamps are not designed for other measuring instruments or applications requiring different connection types or current ratings.

Mounting and Installation

Installation is performed by simply inserting the fork cable lugs into the corresponding connection sockets of the micro-ohmmeters. The clamps themselves are applied to the connections to be tested, with the 42 mm opening allowing connection to larger cables or terminal pins. The 3 m long connecting cable provides sufficient freedom of movement to perform measurements even at hard-to-reach locations. No additional tools or mounting aids are required.

Advantages in Operation

Using the Kelvin test clamps leads to a significant improvement in measurement accuracy, especially for very low resistances. The four-wire measurement eliminates systematic errors caused by contact and lead resistances. The robust construction of the clamps and the flexible 3 m cable ensure reliable and easy handling in daily use. The clamps are rated for 10 A current, making them suitable for most applications in electrical installation and operational technology. Compatibility with the specified micro-ohmmeters ensures direct integration into existing measurement systems.

General
Compatible devices	C.A 6240, C.A 6250, C.A 6255

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