digital devices

One of the problems in the electrical network with isolated (compensated) neutral is the selective determination of the damaged element in a single-phase earth fault. For selective and reliable operation of protections against single-phase earth faults in networks with isolated (compensated) neutral, in addition to the zero-sequence current, information on phase voltages and zero-sequence voltage of the electrical network is required. Many transformer substations do not have traditional electromagnetic voltage transformers.

When you set up a routine check and certain complex relays, such as relay of the direction of power of the RBM series, difficulties with test performance of electromechanical relays using traditional analog technical means of verification. For configuration and verification of relay protection and automation ( RPA ) performed both analog and digital on the principle of recently used special test system implemented on a digital basis. These devices allow you to quickly and efficiently perform set-up and verification of complex sets of relay devices and certain complex relay.

The specialized module of check of distance protection is developed for digital test system