DOCA0095EN

Altitude

Circuit breakers are designed to operate within specification at altitudes up to 2,000 m (6,600 ft.). Above 2,000 m (6,600 ft), the following derating is required:

Characteristic

Altitude (m/ft)

2,000 m
(6,600 ft)

3,000 m
(9,800 ft)

4,000 m
(13,000 ft)

5,000 m
(16,500 ft)

Impulse withstand voltage

Vimp

8 kV

7.1 kV 6

6.4 kV

5.6 kV

Insulation voltage

Vi

800 V

710 V

635 V

560 V

Maximum operational voltage

Ve

690 V

690 V

635 V

560 V

Average current capacity (A) at 40 °C (104 °F)

In x

1

0.98

0.96

0.94

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