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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
and product data sheet.
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.
To connect the machine to cooling circuit, use connectors that can be attached to G3/4 bores (two
bores).
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.
When installing the connection box lid, make sure there are no foreign particles between the
connection box lid and the insulation and that all connection box fasteners are in place.
Missing or loose screws can compromise the insulation.
Make sure the power cables exit straight from the terminals and do not rub against the sharp
cable through-holes or other sharp edges which could wear out the cable insulation over
time.
Do not place any excess weight on the connection box lid(s).
The high voltage cables of the electric machine are connected to the connection box(es) of the electric
machine. The Figure below shows the components of the high voltage connection box assembly.
You are allowed to open only the nuts and bolts that are specified here. Only Danfoss professionals are
allowed to open other nuts and bolts in the terminal box.
Installing the power cables:
User Guide
EM-PMI540-T4000
Installation
34 |
©
Danfoss | April 2023
BC265857716810en-000202