Trial Run; Checking Insulation Resistance - Siemens 1PH818 Operating Instructions Manual

Commissioning

7.2 Trial run

Cooling
● The cooling water supply is connected and ready for operation.
Rolling-contact bearings
If the motor has been stored for more than three years in a dry, dust-free and vibration-free
room, prepare the commissioning procedure as follows:
● Replace the bearings on motors with lifetime lubrication.
● Replace the grease in motors with re-greasing system.
If stored under less favorable conditions, replacement of bearings or re-greasing must be
carried out after a storage period of approx. 18 months.
7.2 Trial run
● If you want to start the motor for a trial run, connect it to the cooling water supply.
7.3

Checking insulation resistance

Safety note
Only expert personnel should be entrusted with work on power installations.
Checking the insulation resistance
After long storage or shutdown periods, the insulation resistance of the windings must be
measured to ground with direct voltage.
CAUTION
Before you begin measuring the insulation resistance, please read the manual for the
insulation resistance meter you are going to use.
46
WARNING
Risk of burning from hot steam
If the cooling water supply fails, the motor will overheat. If cooling water runs into the hot
motor, hot steam suddenly forms, which escapes under high pressure. The cooling
water system can burst. This can result in death, serious injury or material damage.
Do not connect the cooling water supply until the motor has cooled down.
WARNING
Siemens AG Operating Instructions V1.0 1PH8
A5E02605207A AA