Bagaimana prosedur kerja di dekat jaringan listrik tegangan tinggi?

Bekerja di dekat overhead powerline adalah salah satu risiko tertinggi untuk crane dan tall equipment - electrocution adalah frequent cause of fatality.

Minimum Safe Distance dari Powerline:

Berdasarkan regulasi Kemnaker dan PLN:

• Low Voltage (<1kV): 1 meter
• High Voltage (1-33kV): 3 meter
• Extra High Voltage (33-150kV): 4.6 meter
• Ultra High Voltage (>150kV): 6 meter

Jarak diukur dari closest point of equipment (boom tip, load, rigging) ke powerline.

Planning Phase:

1. Site Survey

• Identify semua powerline di dan sekitar work area
• Confirm voltage level dengan PLN
• Measure actual clearance available

2. Risk Assessment

• Apakah work bisa dilakukan safely dengan existing clearance?
• Jika TIDAK - consider alternatives

3. Control Hierarchy

Option 1: ELIMINATE (Best)

• Request PLN untuk de-energize line temporarily
• Paling aman tapi expensive dan complex approval

Option 2: ISOLATE

• PLN install insulating cover pada powerline
• Reduce risk tapi tidak eliminate

Option 3: BARRIER

• Install physical barrier (goal post) untuk prevent equipment encroachment
• Visual warning bunting

Option 4: ADMINISTRATIVE (Last Resort)

• Detailed Safe Work Procedure
• Dedicated spotter dengan stop work authority
• Operator briefing dan acknowledgment

Operational Phase:

• Pre-start meeting: Briefing all crew tentang powerline hazard
• Spotter position: Clear view dari powerline dan equipment
• Communication: Constant radio contact operator-spotter
• Exclusion zone: Barrier tape minimum safe distance
• Emergency plan: Briefed dan rehearsed

EMERGENCY - If Contact Occurs:

• STAY IN CABIN - do NOT exit vehicle
• Call for help - PLN untuk de-energize
• If must evacuate: JUMP clear (no contact cabin-ground simultaneously), shuffle away
• Bystanders: Stay >10m away, treat area as energized

Powerline contact = instant death - take every precaution!