Dari pemeriksaan yang telah dilakukan menunjukkan bahwa kerusakan berawal dari pompa auxiliary cooling water 5A macet yang menyebabkan motor mengalami over load dan sistem proteksi tidak dapat mengamankan motor, sehingga perlu pemeriksaan pada pompa motor dan sistem proteksi. Sistem proteksi motor tidak bekerja karena setting dari arus lebih waktu seketika/Instantaneous terlalu tinggi yakni 10x CT rating, sehingga saat motor auxiliary cooling water 5A mengalami over current dan tidak terdeteksi karena belum menyentuh batas setting over current. Perbaikan proteksi motor dengan setting ulang berdasarkan perhitungan standar NEC dan ANSI, maka diperoleh hasil setting arus lebih waktu seketika/Instantaneous adalah (7,3 – 8,6)x CT rating.

From the examination that has been done shows that the damage started from the auxiliary cooling water pump 5A jammed causing the motor overload and protection system can not secure the motor, so it needs checking on the motor, pump and protection system. Motor protection system does not work because the setting of the over current / Instantaneous current is too high that is 10x CT rating, so when the auxiliary motor cooling water 5A experience over current is not detected and because it has not touched the over-current setting limit. Improved motor protection by resetting based on standard calculation of NEC and ANSI obtained result of setting over current / Instantaneous current is (7,3 - 8,6)x CT rating.