Seepex BN 5-12 Series, Operation & Maintenance Manual

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Manual of Electric Motors 61
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1. TERMINOLOGy
Balancing:
the procedure by which the mass distribution of a rotor is checked and, if necessary, adjusted to
ensure that the residual unbalance or the vibration of the journals and/or forces on the bearings at a frequency
corresponding to service speed are within specified limits in International Standards.
[ISO 1925:2001, definition 4.1]
Balance quality grade:
indicates the peak velocity amplitude of vibration, given in mm/s, of a rotor running free-
in-space and it is the product of a specific unbalance and the angular velocity of the rotor at maximum
operating speed.
Grounded Part:
metallic part connected to the grounding system.
Live Part:
conductor or conductive part intended to be energized in normal operation, including a neutral
conductor.
Authorized personnel:
employee who has formal approval of the company.
Qualified personnel:
employee who meets the following conditions simultaneously:
g
Receives training under the guidance and responsibility of a qualified and authorized professional;
g
Works under the responsibility of a qualified and approved professional.
Note : The qualification is only valid for the company that trained the employee in the conditions set out by the authorized and qualified
professional responsible for training.
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