This is the digital module "Waveform Capture on trip event" for Micrologic X trip unit on Masterpact MTZ offer. A digital module is an advanced function that can be uploaded in Micrologic X trip unit at any stage of the product life cycle. Digital modules allow you to customize MasterPact MTZ circuit breaker to your specific needs. The digital modules are available 24/7 on the Schneider Electric GoDigital store (godigital.schneider-electric.com). The upload of the digital modules is made without interrupting power, using EcoStruxure Power Commission software and a USB cable. This digital module automatically logs 5 cycles of phase and neutral currents, with a sampling period of 512 micro seconds in case of trip by LSI or G or optional protections. Within the 5 cycles of the waveform capture, there 4 cycles before the trip event and 1 cycle after the trip event. The record can be retrieved with the Smartphone and EcoStruxure Power Device in Comtrade format. In addition the wave form capture function records the circuit breaker open/close/trip and signal ZSI out. The benefit is the automatic recording of waveform, which helps to analyze the trip event in detail. At a glance, it helps to understand the nature and the gravity of the trip event (with amplitude and duration) and the potential damage on the installation.