Danfoss VLT HVAC Drive FC 102 Instruction Manual page 119

General Specifications
Speed accuracy (open-loop)
All control characteristics are based on a 4-pole asynchronous motor
Control card performance
Scan interval
Control card, USB serial communication
USB standard
USB plug
CAUTION
Connection to PC is carried out via a standard host/device USB cable.
The USB connection is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
The USB connection is NOT galvanically isolated from protective ground. Use only isolated laptop/PC as connection to
the USB connector on the adjustable frequency drive or an isolated USB cable/drive.
Protection and features
•
Electronic thermal motor protection against overload.
•
If the temperature reaches a predefined level, temperature monitoring of the heatsink ensures that the adjustable
frequency drive trips. An overload temperature cannot be reset until the temperature of the heatsink is below the
values stated in Table 7.1 to Table 7.4 (Guideline - these temperatures may vary for different power sizes, enclosure
sizes, enclosure ratings, etc.).
•
The adjustable frequency drive is protected against short-circuits on motor terminals U, V, W.
•
If a line phase is missing, the adjustable frequency drive trips or issues a warning (depending on the load).
•
If the intermediate circuit voltage is too low or too high, monitoring of the intermediate circuit voltage ensures
that the adjustable frequency drive trips.
•
The adjustable frequency drive is protected against ground faults on motor terminals U, V, W.
MG11F522
Instruction Manual
Danfoss A/S © 08/2014 All rights reserved.
30–4000 rpm: Maximum error of ±8 RPM
1.1 (full speed)
USB type B "device" plug
5 ms
7 7
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