Fourth Week

· There are two types of feeder pillar – 1600 amp and 800 amp

· Feeder pillar is designed with cover to protect the bask bar and is usually placed outside a building.

· There are components in feeder pillar (which is the same with LV Board) such as link, outgoing fuse, current transformer, thermal demand indicator meter (TDI), instrument supply 6A, cut-out & neutral link 60A and phase barrier

· The 1600 amp one have 8 outgoing cable whereas the 800 amp have 4 outgoing cable

· Outgoing fuse is used connect the bask bar to low voltage cable.

· The 1600 amp feeder pillar is not suitable to use with 500mm cable because the load will not be enough to support it

· There are 3 fuses in each outgoing bar.

· Fuse factor is 1.5. If the blow point of the fuse is written 160A, then the exact load the will make the fuse blow is 160A × 1.5 which is equal to240A.

· There are several test that must been made before PPVR is operated. It is of course to make sure that PPVR is safe for the staff to work with it.

· The PPVR test is divided into two which is a) before installation and b) after installation.

· Before installation test : Phase-to-Phase test and Phase-to-Neutral test need to be done, and the insulator resistance must be ≥ 1MΩ

· After installation test: There are three test need to be check for which are voltage test, ujian turutan fasa, and feedback test.

· Voltage test is operated to make sure the voltage out from the PPVR is standard with the safety of TNB

· Feedback test is drive to make sure there are no feedback voltage from the consumer (houses and factories) that were using genset.

· There was heavy rain for a few days this week. So, there were so many breakdowns they have to do and cannot bring the LI guys. There were trees fall on the life cable, which is very dangerous for people. And even the pillar was upside down.

· Main carom.