MEMATUHI KERJA-KERJA DENGAN PERATURAN ELEKTRIK VOLTAN RENDAH

What is the most critical step before performing a shutdown work on a high voltage substation?

• Close the substation fence

• Hang a warning notice

• Ground the isolated conductor

• Measure the load current with a multimeter

When shutdown work is performed, the NSL and SL padlock keys are used to:

• Prevent the public from entering the substation

• Lock the gate door for safety

• Lock the switch so it cannot be turned on again

• Determine the phase direction of the line

What voltage reading proves that the circuit is completely safe to touch after shutdown?

• Between phases = 415V, phase-neutral = 230V

• Between phases = 0V, phase-neutral = 0V

• Between phases = 11kV, phase-neutral = 6.6kV

• Between phases = 1000V, phase-neutral = 600V

Why can live line work only be performed by workers with special certification?

• To reduce maintenance costs

• Because they have been trained with special techniques & PPE

• So that work can be completed faster

• To avoid the use of testing equipment

What is the main function of the HRC fuse in the LV distribution board?

• Stabilize voltage at the transformer

• Determine load balance between phases

• Protect the final circuit from overload & short circuit

• Control the power factor rate of the load

What is the first action when needing to climb a wooden pole for overhead line work?

• Ensure the pole is not leaning

• Check for wood rot before climbing

• Hang a safety rope first

• Test voltage using a phasing stick

Why should line work not be carried out during bad weather?

• Difficult to obtain testing readings

• Can reduce the stability of the wooden pole

• Risk of shock & lightning increases

• Cannot hang warning signs clearly

What is the main function of the 'Discharge Rod' in shutdown work?

• Measure the insulation resistance of cables

• Ground residual charge on the conductor

• Test the balance of 3-phase current

• Connect the load to the transformer

In shutdown operations, what is the main role of the 'AWAS' and 'BAHAYA' signs?

• Warn workers and prevent the re-energizing of supply

• Guide technicians for voltage testing

• Replace insufficient PPE equipment

• Used only for substations in buildings

Why must the main switchboard be arranged so that the final circuit can be easily isolated?

• To ensure the power factor can be controlled

• To reduce cable supply costs

• To easily identify & isolate faults

• To improve transformer efficiency