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Explosion-protection safety precautions

42/68-167-EN RHDE250 ... 4000 (Contrac) 11

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2 Explosion-protection safety precautions

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als

Important

Technical modifications to the actuator or motor cancel the explosion protection.

• Before installing the actuator, review the information on the ID label regarding device class,

Ex category, Ex zone and temperature class to make sure the actuator is approved for

operation in the relevant hazardous area. In the event of deviations, the actuator may not be

put into operation.

• Check the oil level and mounting position prior to commissioning the device in explosive

atmospheres.

• Only use levers for the shaft that are specified by the manufacturer. Use of other levers

requires ATEX certification.

Important

Read the information in chapter Installation with additional drive elements, page 1

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2.1 Operation via frequency transformer

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• The frequency converter (electronic unit) may not installed or used within the hazardous

area.

• Check whether the electronic unit is loaded with the parameters of the actuator it is

connected to.

• Check the electronic unit for proper connection to the correct actuator.

• Setpoint monitoring is activated as default setting when the electronic unit leaves the

manufacturer. Do not de-activate this setting.

• Rapid traverse mode is not allowed on Ex actuators, and the feature cannot be activated

from the user interface.

• The Contrac power electronic unit must be upstream from the motor temperature monitoring

unit SD241B or similar, certified tripping unit.

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2.2 Preventing electrostatic charging

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Due to potential unallowed charging of the housing, the effects of high voltage sources on the

equipment must be prevented.

Important

Clean coated surfaces with a damp towel.

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