[극한직업/Extreme JOB] 송전 전기원 제1부

Main ideas & lessons conveyed

• The video highlights extreme, physically and technically dangerous work performed by electric transmission workers (송전 전기원 / Songjeon Giwon), portrayed as “guardians of light.”
• Their tasks go beyond ordinary labor and include:
  • Climbing very tall, high-voltage transmission towers
  • Working near live electricity
  • Performing inspections and cleaning in conditions where accidents can be fatal
• The video contrasts two major phases of work:
  • Inspection, described as being done “during ceasefire,” implying comparatively safer/controlled conditions.
  • Live cleaning of insulators, performed while power lines are still energized, creating strong induced voltage and major shock risk.

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Detailed methodology / step-by-step processes mentioned

A) Tower inspection (spring cleanup / special power line inspection)

Start of work

• Work begins at a 345,000V ultra-high-voltage transmission tower (about ~80m above ground, as described).

Safety preparation before climbing

• Workers conduct full safety checks, including:
  • Carefully checking the tightness of the waist-type seatbelt buckle.
• Since reporters/crew cannot access live areas directly:
  • Cameras are mounted on workers’ helmets.

Climbing procedure

• Workers move carefully one step at a time, holding onto tower structure/rods.
• The video stresses:
  • You can’t stop midway just because it’s difficult.
  • You must remain ready for loss of strength/fear of falling.

On-site inspection task

• Workers visually inspect components such as spacer dampers (the gaps between wires).
• They also use tools and tactile verification (implied throughout), including fastening and equipment checks.

Concentration and continuous work

• Even while the task is ongoing, workers must maintain:
  • extreme concentration
  • constant awareness that one slip can cause a fatal fall
• The work continues for 8+ hours per day at front-line sites until completion.

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B) Live insulator cleaning (performed with power lines energized)

Cleaning location & logistics

• Full-scale cleaning can involve regions such as the East Sea, requiring transporting water and equipment into difficult mountain locations.

Critical rule: only specific qualified cleaning water

• Use clean water with specific resistance ≥ 0.25 MΩ
• Water must not contain heavy metals
• Rationale:
  • If not properly qualified, the water can become conductive—turning the cleaning process into a live electrical pathway.

Water quality verification

• Workers perform a water correction test / measurement to confirm resistance and suitability.

On-tower preparation

• Cleaning is performed while managing strong induced voltage risks.
• Strict protective measures and discipline regarding distance are required.

Water spraying control principle

• Once spraying begins:
  • Maintain a constant pressure and constant water amount.
• If pressure/water flow changes or is interrupted:
  • There is risk of electrocution not only for the upper worker but potentially for the entire team, because electrical paths can form unexpectedly.

Electrical risk dynamics described

• Workers note that electricity can follow even small or weaker flows.
• Therefore, the water must flow strongly enough to disrupt electrical continuation by effectively changing the electrical conditions.

End-of-job procedure

• When finishing:
  • Shut off the engine/water supply
  • Keep guard up until the water supply unit is far from the insulator
  • Drain remaining water from the hose completely to avoid residual conductive risk.

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C) Live work safety equipment / fall-prevention described

• Workers use specialized safety systems while working at height:
  • Ring ropes and harness-related protective gear, serving as secondary fall prevention
  • These help keep a worker secured to a power line if a fall occurs
• Team-wide preparation includes ensuring all workers wear ring ropes before entering the live work area.

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Key concepts explained (technical + practical)

• Induced voltage

  • Even if the electricity to the wire is “cut” (in the inspection scenario), induced charge/current can remain and create dangerous current paths.
  • Example figure provided:
    • Induced voltage from a 154,000V transmission tower described as 6,600V
    • Framed as roughly 30× household 220V.

• Live-state cleaning increases danger

  • Cleaning is done with lines energized, unlike “ceasefire”-like inspection conditions.
  • Strong induced voltage can cause extreme risk, including:
    • A worker being thrown off if too close or if strict safety distances (e.g., more than 1 meter) are not maintained.

• Terrain difficulty as a safety factor

  • Towers are often in mountain terrain, requiring:
    • long uphill treks (e.g., described as 15–20km of hiking overall)
    • carrying heavy equipment
    • dealing with slippery ground and wind/snow conditions
  • Example additional detail:
    • later described as about ~1km on foot from a vehicle area.

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Overall narrative of the video (what happens)

• The video opens with a dramatic emphasis on:
  • physical limits,
  • tingling fear,
  • and life-or-death consequences.
• It then follows workers through:
  1. Climbing and inspecting a very high-voltage tower.
  2. Transitioning to live insulator cleaning in harsh mountain conditions, including qualified water requirements and strict pressure control.
  3. Reaching a critical moment where red sparks fly from insulators during cleaning—heightening the risk of a major shock accident.
  4. The clip ends with visible applause and continued music, implying tension without fully showing the final outcome in detail.

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Speakers / sources featured (as indicated in subtitles)

• Narrator / production voice (implied throughout the documentary-style explanation)
• Songjeon Giwon (송전 전기원 / transmission workers) (multiple workers shown/quoted)
• Teacher / instructor (a worker refers to “Teacher,” likely speaking to or being spoken to)
• Korea Electric Power Corporation (KEPCO / 한국전력공사) (referenced for transmission statistics: ~5,500 lines)