SLD for the written switching procedure
Black colour is what I wrote
Red colour is the correction or further explanation.
Job Sheet: To perform maintenance at Ring Main Unit (2 + 1) at Pencawang Elektrik Kg Jelutong
(RMU 2+1 means 2 feeder and 1 Tx)
Preparation at all substations
1. Wear complete arc flash PPE
2. Note any alarms, trips and conditions of switch gears
3. Ensure rubber mat is available at all time
4. Ensure that HT voltage stick and multimeter are in good working condition.
• the steps above are done at each substation prior to commencing of switching work,
P/E Kg Jelutong
1. Inform OIC
2. At FA NOP
2. Note any alarms, trips and conditions of switch gears
3. Ensure rubber mat is available at all time
4. Ensure that HT voltage stick and multimeter are in good working condition.
• the steps above are done at each substation prior to commencing of switching work,
P/E Kg Jelutong
1. Inform OIC
2. At FA NOP
A. Perform voltage measurement at bus bar
a. Must state I.e. measured voltage is at 230VAC ph-n and 400VAC ph-ph within 10%, -6% tolerance for both bus bar and cable
B. Perform voltage measurement at cable
C. Perform phase rotation check at bus bar
a. Clockwise rotation for both bus bar and cable
D. Perform phase rotation check at cable
E. Perform phasing check between bus bar and cable
a. 0 VAC for in phase and 400VAC for out of phase
a. Must state I.e. measured voltage is at 230VAC ph-n and 400VAC ph-ph within 10%, -6% tolerance for both bus bar and cable
B. Perform voltage measurement at cable
C. Perform phase rotation check at bus bar
a. Clockwise rotation for both bus bar and cable
D. Perform phase rotation check at cable
E. Perform phasing check between bus bar and cable
a. 0 VAC for in phase and 400VAC for out of phase
