3.2 Power Supply and Consumption
3.2.1 Power Consumption
Figure 20: Electrical power consumption
(Measured on OEM model with LPP-200.7 pump head but also representative for EasyConnect and Stand-Alone models)
3.2.1 Inrush Current
When selecting an AC/DC power supply the inrush currents (currents during power-on) shown in Table 7
shall be considered. If the specifications of the power supply are unclear a test with multiple power-on cycles
is recommended to assure proper operation.
Table 7: Inrush currents of power supply driver during power on of driver (Measured at 24 VDC + 10%)
3.2.2 Guidelines for Power Supplies
If other power supplies than the standard specified ones are used, it is recommended to evaluate them
under demanding operating situations like fast braking from maximum speed and during power on and take-
off of the impeller.
3.3 Temperature Monitoring
To avoid overheating of the system, the controller and motor temperatures within the driver are monitored. If
one of both temperatures exceeds 80°C (176°F) for a duration of more than 10 minutes, the system goes
into an error state and the pump stops. At 90°C (194°F), the system stops immediately.
If 65°C is exceeded a warning is given within the driver announcing to the user that the driver is running near
the thermal limit (see explanation in Section 3.4). The warning signal can be monitored with the Levitronix
®
Service Software or configured on one of the digital outputs.
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