-12- B1091-GB-3212 www.nord.com
6. Motors for use in Zone 21
and Zone 22
6.6 Maintenance
The voltage must always be switched off and secured against being switched on again!
Attention! Higher temperatures than the maximum permitted surface temperature of the housing may
be present inside the motor. The motor must therefore never be opened in hazardous dust
atmospheres!
The motors must be checked and tested regularly for functional safety! The applicable national
standards and regulations must be complied with!
Unpermitted high dust deposits > 5 mm may not be allowed to build up! If functional safety cannot be
ensured, the motor may not be operated!
When the ball bearings are replaced, the rotary shaft seals must also be replaced. FKM rotary shaft seals as
specified by Getriebebau NORD must be used. Ensure that they are fitted correctly!
The rotary shaft seals must be lubricated on the external rings and on the seal lips. If an explosion protected
gear is flanged dust-tight to the motor, an NBR rotary shaft seal can be used on the drive side of the motor if
the gear oil temperature does not exceed 85°C.
Only original parts may be used as spare parts with the exception of standardised, commercially available
and equivalent parts. This also applies in particular to seals and connection components. Parts for terminal
boxes or spare parts for external grounding must be ordered as per the spare parts list in the operating
instructions.
The functionality of seals, rotary shaft seals and cable glands must be regularly checked!
Maintaining dust protection for the motors is of paramount importance for explosion protection.
Maintenance must be implemented by qualified personnel in a specialist workshop with suitable equipment.
We urgently recommend that general overhauls are implemented by NORD Service.
To Next Page
Loading...
Need help?
General
