In modern power distribution systems, interference is an increasingly frequent occurrence due to the increased usage of modern power electronics. Non-linear loads such as frequency converters, switched-mode power supplies, or electronic ballasts cause this problem. Typical system interactions are harmonics changes in the r.m.s. value of the voltage or luminance fluctuations.
Electrical supply systems are becoming larger over time. It is not rare that failures and disturbances are the consequence of overloaded networks. High harmonic components in the design current can overload wiring systems and even cause a fire. If overloading of the neutral conductor is to be expected due to harmonics, IEC recommends overload detection for the neutral conductor. The effectiveness of such measures largely depends on the operational status of the electrical installation. An evaluation can only be realized by continuous monitoring of the harmonic content and measuring the operating currents to ensure the safe and secure operation of the electrical installation. To mitigate these risks, Bender provides electrical safety solutions for electrical power generation and distribution networks.
Electrical failure or faults within vital systems inside a power plant or transformer station can lead to massive follow-up costs. Using Bender devices and a consistent strategy, these faults can be detected and resolved quickly. Our tested ground-fault monitoring devices and systems are the basis for successful retrofits and new projects. Years of experience with our products will support you in avoiding risks and downtime in your electrical system. At Bender, we strive to be your support when it comes to questions about electrical safety, longevity, and the reliability of your power plant/transformer station, combined with ensuring the most excellent possible protection of your personnel.
The goal of a monitoring system must be to recognise even small changes of relevant measuring quantities such as leakage current or the harmonic content and to generate a prewarning in the event of deviations at the earliest possible stage. You cannot have trend curves of relevant measuring quantities appropriately monitored for voltage quality or leakage currents by using a single measuring point in an electrical installation. Several measuring points are to be installed and adapted to correspond to the structure of the system.