The E25 current clamp from Chauvin Arnoux is a compact measuring instrument for capturing alternating and direct current up to 80 A. The device is suitable for applications in electrical contracting, maintenance, and installation of electrical systems, where precise current measurement without direct contact with the conductor is required. The clamp features a jaw opening with a diameter of 11.8 mm, enabling measurement on cables and conductors of medium size. Current measurement is performed via a two-colour sensitivity indicator with two measurement ranges: 1 V/1 A and 10 mV/1 A, allowing the display to be adjusted according to measurement conditions. The clamp is approved for use in electrical systems up to 600 V CAT III and 300 V CAT IV, ensuring safe operation in industrial and commercial environments.

Applications

The E25 current clamp is used in electrical engineering to monitor the current consumption of devices, machines, or conductors. It is particularly useful for troubleshooting in electrical systems, checking circuits, or commissioning devices. Measurement is contactless, minimizing the risk of short-circuit or electric shock. The clamp is suitable for indoor and outdoor use, provided environmental conditions meet the requirements of the protection rating.

Functions and Equipment in Detail

The device can be operated either battery-powered or via an external 5-volt power supply, enabling flexible use. The DC zero adjustment allows precise calibration of the measurement value, especially for direct current measurements. Automatic power-off protects the battery and extends the device’s lifespan by turning it off after a specified period of inactivity. The two-colour sensitivity indicator assists the user in selecting the appropriate measurement range to ensure accurate measurement.

Technology Explained Simply

The current clamp uses the principle of magnetic induction to detect current flowing in a conductor. The magnetic field generated by the current is converted into an electrical signal, which is then displayed on the screen. The clamp is designed for alternating and direct current, with direct current measurement optimized via the DC zero adjustment. The protection rating CAT III/600 V and CAT IV/300 V ensures the device is suitable for use in electrical systems with corresponding voltage classes, where CAT III applies to stationary installations and CAT IV to primary power supply.

Compatibility and Accessories

The E25 current clamp is compatible with an external 5-volt power supply, enabling continuous operation without battery replacement. There are no specific accessories listed in the manufacturer’s catalogue. However, the clamp can be combined with other measuring instruments to perform comprehensive electrical measurements, such as analysing current consumption and voltage in a network.

Mounting and Installation

The clamp is simply closed around the conductor to be measured, with the jaw opening having a diameter of 11.8 mm. No additional mounting or installation work is required. Operation is performed via buttons for selecting measurement ranges and zero adjustment. The display is clearly readable and shows the measured current value.

Advantages in Operation

The E25 current clamp provides fast and safe current measurement without direct contact with the conductor. Automatic power-off and the option for external power supply increase efficiency and extend the device’s lifespan. The CAT III and CAT IV approval ensures safe use in various applications. The two-colour sensitivity indicator helps the user select the correct measurement range, improving measurement accuracy.

Batteries are not included in the delivery scope.