Environmental Conditions

Ambient Temperature

The ambient temperature refers to the temperature of the air immediately surrounding the device.

  • Operation temperature:

    • –25 to +70 °C (–13 to +158 °F): Normal operating temperature

    • –35 to –25 °C (–31 to –13 °F): Commissioning possible

  • Storage temperature: –50 to +85 °C (–58 to +185 °F)

Extreme Atmospheric Conditions

TeSys GV5 / GV6 devices are designed to operate in industrial atmospheres as defined in IEC/EN 60947-2 standard for the highest level of pollution (level 3).

They are tested for extreme storage conditions according to the following standards:



IEC/EN 60068-2-2

Dry heat, severity level +85 °C (+185 °F)

IEC/EN 60068-2-1

Dry cold, severity level –50 °C (–58 °F)

IEC/EN 60068-2-30

Damp heat, cyclic

  • temperature +55 °C (+131 °F)

  • relative humidity 95%

IEC/EN 60068-2-52

Salt-mist test

It is recommended to install the device in a properly ventilated switchboard without excessive dust.


TeSys GV5 / GV6 devices are tested against vibration.

Conformity tests are carried out in accordance with IEC/EN 60068-2-6 standard at the levels of severity required by the merchant shipping regulatory body (DNV-GL):

  • 2 Hz to 13.2 Hz with an amplitude of +/- 1 mm (+/- 0.04 in)

  • 13.2 Hz to 100 Hz at a constant acceleration of 0.7 g

Electromagnetic Disturbances

TeSys GV5 / GV6 devices are immune to electromagnetic disturbance.

Overcurrent protection tests are carried out in accordance with the electromagnetic compatibility (EMC) standard (IEC/EN 60947-2 standard appendixes F and J).

Check for compliance with EMC standard by testing for immunity to:

  • Overvoltages produced by the operation of electromagnetic switchgear.

  • Overvoltages produced by atmospheric disturbance that pass through the electrical network (for example, lightning).

  • The use of apparatus emitting radio waves (such as radio transmitters, walkie-talkies, or radar).

  • Electrostatic discharges produced by the operators themselves.

Conformity with EMC standard as described above helps to ensure that:

  • The device operates correctly in a disturbed environment:

    • Without nuisance tripping.

    • In accordance with the trip time.

  • There is no disturbance to any type of industrial or commercial environment.


TeSys GV5 / GV6 devices are designed to operate within specification at altitudes of up to 2,000 m (6,600 ft).

Above 2,000 m (6,600 ft) modifying the characteristics of the surrounding air (dielectric strength, cooling capacity) causes derating as follows:

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)

Maximum operating voltage (Vac)





Rated operational current at 40 °C (104 °F)





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