Auto Crane HC-10 NEXSTAR, Руководство пользователя, Страница: 13 / 92

13
Qualifications and Operating Practices
HC-10 NEXSTAR
1. Do not place any part of the crane or load inside the Danger Zone.
Exceptions:
A. The Danger Zone may be entered after confirmation by an appointed person the electrical
distribution and transmission lines are de-energized and visibly grounded at the point work.
B. The Danger Zone may be entered if insulating barriers are erected to prevent physical contact with
the lines. These can’t be a part of or attached to the crane.
2. For the minimum safe distance between electrical lines and any part of the crane or load (including
handling appendages), or while in the transit with the boom stowed, see Safe Operating Distance Table
below.
3. Exercise caution when working near overhead lines. They can move horizontally and vertically due to
wind, shifting the location of the Danger Zone.
4. Assign a qualified, signal person to observe the clearance and warn the crane operator before
approaching the Safe Operating Distance limits.
A. Treat all overhead wires as energized until the person or utility owning the line verifies it is not
energized.
B. Exceptions ensuring equivalent protection are allowed, if approved by the administrative or
regulatory authority in writing.
C. Install durable signs at the operator’s station and on the outside of the crane, warning that
electrocution or serious bodily injury may occur if the Safe Operating Distance Table limits are not
adhered to.
Preparing The Crane For Operation
Safe Operating Distance for Cranes Near Electrical Lines
Normal Voltage,
kv (Phase to
Phase)
Specified Clearance, ft (m)
During Operation
Up to 50 10 (3)
Over 50 to 200 15 (4.6)
Over 200 to 350 20 (6.1)
Over 350 to 500 25 (7.6)
Over 500 to 750 35 (10.7)
Over 750 to 1,000 45 (13.7)
Over 1,000
Determine specific clearance after consultation with
utility owner/operator
During Transit or Travel With No Load and Boom or Mast Lowered
Up to 0.75 4 (1.2)
Over 0.75 to 50 6 (1.8)
Over 50 to 345 10 (3.1)
Over 345 to 750 16 (4.9)