Cooling connections
Make sure that cooling liquid runs freely into and out from the electric machine.
To prevent damage to the cooling connectors, refer to the documentation of the
manufacturer for the correct tightening torque of the cooling liquid nipples.
When selecting cooling liquid nipples, choose nipples that can resist galvanic corrosion.
Cooling connectors have G3/4 bores.
Connect the electric machine properly to the cooling circuit. Make sure that the coolant flow is equal or
higher than rated and the coolant temperature at the inlet of the machine cooling is lower or equal to the
rated temperature. For more information, see Chapter
Rated values can be found in the electric machine rating plate.
Aluminum frame water-cooled construction is only to be used with a closed fresh water circulation with
corrosive inhibitor described in the data sheet. The water cooling circuit connection is described in the
data sheet. Use only suitable and high-class connection parts and seals to connect the electric machine to
the water circuit. Check for possible leaks after the piping and joints have been connected.
It is recommended to use coolant connector equipped with o-ring seal or to use sealing washer (for
example Usit or Bonded seals) in the connection. In addition, it is recommended to use thread sealant
(Loctite 577 or similar) at the coolant connections to prevent loosening. Loosening can be caused by
vibration or temperature variations.
The electric machines are equipped with at least three PT100 temperature sensors in the windings. The
amount of the sensors depend on the options chosen. The temperature signal(s) can be read out from
the measurement connector of the machine.
You can connect the temperature signal to the temperature monitoring pin in the inverter (EC-C) and
make sure that the inverter has the electric machine temperature protection feature activated.
Electrical installation
Power connections
High voltage connection
Risk of electric shock when connection box is open. When you work with power connections
make sure that electricity is disconnected and shaft rotation is prevented.
User Guide
EM-PMI300-T310
Installation
©
Danfoss | April 2023
BC265858156812en-000202 | 33
