Installation Safety

Elma RCDtest is a new small and handy instrument for testing RCDs. The clever 2-pole voltage tester design means, that “the third hand” is not necessary for operation. The result is displayed on a high luminous OLED color display, which makes the instrument ideal both in daylight and in darkness. The instrument contains a built-in flashlight, making measurements in dark environments even easier. The instrument tests if RCD trips on the right current and time. The available types of RDCs are A, AC and selective at 0/180 °, x½, x1, x2 and x5, displaying the response time and using the ramp function also displays the actual tripping current. In addition the Elma RCD test measures loop impedance, voltage and touch voltage. Elma RCDtest is IP 43 and is supplied with test leads, bag and instruction manual. Meets IEC 61010-1 Cat III 300V.

Correct testing and verification in accordance with IEC 60364-6 can be extensive, but no less important, as installation testing is quality control and thus the foundation when it comes to the functional and personal safety of electrical installations.

The first step for correct testing and verification is a test instrument with the necessary measurement functions; the next step is that the test instrument is user-friendly, and these are the points where the Elma iTest 7400 stands out!

To make the operation of the Elma iTest 7400 as easy as possible, test functions are selected with a rotary switch while test settings are changed via arrow keys. Settings and measured values are easily read on the colour display, which can also show help images if there is any doubt about a test setup.

The Elma iTest 7400 is equipped with functions for initial verification, periodic inspection, and troubleshooting of electrical installations:

• Continuity test with 200 mA for verification of the protective conductor's continuous connection and/or potential bonding, as well as a simple continuity test/beep test with low test current.
• Insulation resistance test at predefined test voltages from 50 V to 1000 V and adjustable threshold value.
• Measurement of line impedance and voltage drop. Built-in fuse tables with thresholds make it easy to determine if the installation is safe.
• Measurement of fault loop impedance taking into account the type of residual current protection for easy verification and without tripping the RCD.
• RCD testing of all common types of residual current devices – also EVSE 6 mA DC. Separate test functions for trip time, current ramp test, and auto-test.
• Voltage, frequency, and phase sequence measurement.

The Elma iTest 7400 is delivered in a softcase including test leads, probes, crocodile clips, test cables with both DK-EDB plug and schuko plug, rechargeable batteries and charger, calibration certificate, and user manual.

Elma Combitest 425 is an innovative multifunction installation tester capable of carrying out safety tests on civil and industrial electric systems in compliance with IEC/EN61557-1. Furthermore the instrument is a 1 phase energy analyze and is capable of saving results of environmental parameters (illuminance, temperature), leakage current, active power, harmonics, power factor measurements on single phase systems, pre-installed autosequences, 6mA RCD test suitable for EVSE Electric Vehicle chargers,. The resistive TFT color touch-screen display, the icon menues, the on screen help and the userfriendly development make the instrument extremely intuitive even for unskilled users. Its numberless features grant the user a wide range of applications in the world of measurements. The multifunction installation tester Elma Combitest 425 allows saving all measures into an internal memory so transferring the saved data to a PC by means of USB (optional) or built in WiFi interface with an iOS or Android smartphones or tablet . The software supplied among standard accessories allows printing the testing reports. The instrument also drives optional short circuit adapter to carry out high resolution (0.1mOhm) loop/line impedance measurements with prospective short-circuit current calculation. This allows accurate measurements even close to power stations enabling the user to correctly size the protection devices in any system. Further possible tests consist in checking breakdown current, tripping current, I2t relative to breakers (MCB) with curves B, C, D, K and fuses type gG as well as aM and the percentage voltage drop on the main power lines. The test on earth leakage relay tester RCDs up to 10A (with optional accessory) is also possible with the instrument. Through optional clamp it is possible to measure the leakage current.