Connection Of Purging Air Pipe; Mounting Of Vibration Transducers; Electrical Connections; General Information - ABB AMA Series Manual

Manual for Induction Motors and Generators
***Following chapter for protection type: Ex p

4.2.4 Connection of purging air pipe

4.2.5 Mounting of vibration transducers

4.3 Electrical connections

4.3.1 General information

38 - Mechanical and Electrical Connections
Fill the oil supply system with appropriate oil with correct viscosity. The correct type of oil and
viscosity is indicated on the dimensional drawing. If in any doubt of the cleanness of the oil, use
a 0.01 mm (0.4 mil) mesh to filter unwanted debris from the oil.
Turn the oil supply on, and check the oil circuit for possible leaks prior to starting the machine.
The normal oil level is obtained when half of the oil sight glass is covered.
NOTE: The bearings are delivered without lubricant.
NOTE: Running the machine without lubricant will result in immediate bearing damage.
The EEx p or Ex p machine is explosion protected by pressurizing. It is equipped with a control
system, which includes an air control unit and a relief valve. The system works with
uncontaminated pressurized air as the protective gas. Before the start, the machine is purged to
remove any hazardous gases. During operation, the machine is kept under over-pressure to keep
hazardous gases from entering the machine.
Purging and pressurizing air supply is connected to the flange provided on the air control unit.
The air supply pressure must be between 4 and 8 bar. Required flow rate during purging and
pressurizing is specified on the Ex - certificate. For more detailed information of the control
system, see the supplier's instruction manual.
If the installed vibration transducers project from the machine frame, they are delivered
uninstalled in order to avoid damages during transportation.
For taking vibration transducers into use, proceed as follows:
1. Disconnect the detached vibration transducers from their cables.
2. Remove the shield plugs from the tapped mounting holes on the end shield of the machine.
3. Protect the mounting surfaces against rust with a suitable anti-corrosion agent.
4. Mount the vibration transducers to the tapped mounting holes. The tightening torque
depends on the used transducer type:
• PYM TRV18 : 10 Nm
• PYM 330400_ : 3,3 Nm
• PYM 330500_ : 4,5 Nm
5. Finally, connect the cables to the vibration transducer.
The safety information in Safety Instructions at the beginning of the manual must be observed at
all times.
3BFP 000 050 R0101 REV E