Rancang Bangun Timer Pada Trainer Pengujian Karakteristik Mcb Satu Fasa

Abstract

Over the time passed, the needed of supporting equipment for practical work at Batam State Polytechnic is getting higher. This is caused by the increasing amount of students each year while the practical work equipment concern to the characteristics of Miniature Circuit Breaker (MCB) available at Batam State Polytechnic is not safe yet. Examination the characteristics of a single phase MCB, a timer is needed to find out how long the MCB will be trip. Because of that, in this final project a timer for the trainer is to examine the characteristics of one-phase MCB.

The timer was created only shows minutes, seconds and mili- seconds using seven segments. The maximum timer limit is only up to

59 minutes 99.9 seconds. From the results of the timer testing that was carried out 8 times of testing with date retrieval when testing the cold characteristics of one-phase MCB by using the stopwatch as a comparator that is the highest difference with a time of 0.4 seconds and the lowest difference with 0.1 seconds and the timer test results are done as much 4 times testing with date retrieval when testing the hot characteristics of one-phase MCB by using the stopwatch as a comparison tool which is the highest difference with a time of 0.3 seconds and the lowest difference with a time of 0 seconds.