Operation conditions
The electric device should be used for its intended purpose only and within limits speci ed by the
manufacturer, concerning:
Loading.
Cooling.
Service interval.
Ambient conditions such as temperature and moisture.
The electric device is designed for these conditions:
Ambient temperature limits: -40 °C...105 °C.
Ambient temperature limits for EC-LTS unit: 40°C...85°C.
Maximum altitude 2000 m above sea level.
Maximum coolant liquid temperature at the inlet of the coolant circuit, see product data
sheets.
Coolant liquid must be water-glycol mixture with maximum of 50 % glycol content. See
Chapter Recommended coolants.
The electric device must be pre-charged, see Chapter Pre-charging below.
If the operation limits are exceeded and the electric device is damaged, please contact local
Danfoss representative.
Pre-charging
Do the pre-charging correctly, or the high inrush current may break external electrical components of the electric device.
The electric device DC-link capacitance can be found from the datasheet.
Devices with DC-link capacitance should be pre-charged before connecting them to battery,
supercapacitor or charged DC-link. Pre-charging is needed to limit the inrush current that would
happen, if the capacitors are not pre-charged. Pre-charging can be done by using pre-charge
resistor and contactor before the DC-link is connected to battery, supercapacitor or to another DC-
link that has different voltage. After pre-charging, the safe voltage difference between two
potentials is 5-10 volts.
Figure below shows the principle of pre-charging. C2 is pre-charged from C1 through K1, K3 and R.
EC-C1200-450
6. Operation
| BC265735231757en-000109
©
Danfoss | Produced By: Danfoss Power Solutions | January 2019 | 57
Summary of Contents for EC-C1200-450
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