Setting Ulang Proteksi Motor Auxiliary Cooling Water 5A Di PLTU Unit 5 Unit Pembangkitan Muara Karang.
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Yulianto, Rizki
Pasra, Nurmiati
Pasra, Nurmiati
Subject
Teknik Elektro
Datestamp
2020-02-11 08:46:45
Abstract :
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.
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.
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