General
Enclosure diameter	20 mm

This AC current clamp MN77 is a special accessory for the installation testers of the C.A 6113, C.A 6116N and C.A 6117 series from Chauvin Arnoux. It is designed for precise measurement of alternating current and enables selective grounding measurements, with the function only guaranteed when voltage is applied to the device. The clamp is designed for use in the field of electrical installation and testing, particularly for checking protective conductors and grounding systems.

Applications
The clamp is primarily used in the field of electrical installation to measure current values in the range of 1 mA to 19.99 A. It is especially suitable for testing low-voltage installations where selective grounding measurement is required. The measurement is contactless, thereby minimizing the risk of direct contact with conductive parts. The clamp is therefore ideal for installers, electrical specialists and testing engineers working in the context of safety inspections or maintenance work.

Functions and Equipment in Detail
The clamp features an encircling diameter of 20 mm, allowing it to capture a wide range of conductors and cables without requiring disconnection or rerouting. The measurement range of 1 mA to 19.99 A covers the typical application area for installation testing, including measurement of leakage currents and protective conductor currents. The selective grounding measurement allows individual grounding points to be checked specifically, which is advantageous for diagnosing fault sources in grounding systems.

Technology Explained Simply
The clamp operates on the principle of magnetic induction. When current flows through a conductor, it generates a magnetic field, which is detected by the clamp and converted into an electrical signal. This signal is transmitted to the connected installation tester, which displays the current value. The function of selective grounding measurement is based on the ability to isolate and measure the current flow through a specific grounding path, with the clamp acting as a sensor. The note that the function only works when voltage is applied to the device means that the clamp does not operate in a completely de-energized system, but requires voltage in the network to perform the measurement.

Compatibility and Accessories
The clamp is designed exclusively for the installation testers C.A 6113, C.A 6116N and C.A 6117 from Chauvin Arnoux. The connection is made via the corresponding sockets on the devices. The clamp is not a universal measuring instrument, but specifically adapted to the functionality of these testers.

Mounting and Installation
Mounting is done by simply encircling the conductor to be measured with the clamp. The clamp is connected to the installation tester, with the connection made via an integrated cable or plug connector. Operation is controlled via the main device. The user manual, included in the delivery, describes the correct handling and procedure for measurement.

Advantages in Operation
The clamp enables fast and safe measurement without physical contact with conductive parts. The contactless measurement reduces the risk of electrical accidents. The selective grounding measurement provides precise diagnostic capability for grounding faults. The combination of compact design and an encircling diameter of 20 mm makes the clamp flexible to use, even in confined installation environments. Integration into the installation testers of the C.A series ensures a consistent and reliable measurement environment.

Delivery Contents
The delivery includes the AC current clamp MN77 and the user manual.