Delta Compact Drive MS300 IP66/NEMA 4X Series, User Manual

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12 Description of Parameter Settings

MS300 (IP66 / NEMA 4X)
12-1
12 Description of Parameter Settings

All parameters and setting values in MS300 (standard models) series are applicable for those in
MS300 (IP66 / NEMA 4X) series except the following. Refer to Chapter 12 in MS300 (standard
models) series for the rest of parameter settings.
Download the MS300 (standard models) series user manual at:
1. Pr.00-20, setting value is 7
2. Pr.00-30, setting value is 7
3. Pr.03-39
4. Pr.03-40
5. Pr.03-41
6. Pr.03-42
7. Pr.03-43
8. Pr.06-55: slightly different from that for MS300 (standard models) series. See below for the
difference:

Derating Protection
Default: 0
Settings 0: Constant rated current and limit carrier wave by load current
and temperature
1: Constant carrier frequency and limit load current by setting
carrier wave
2: Constant rated current (same as setting 0), but close current
limit

Allowable maximum output frequency and the minimum carrier wave limit in control mode:
VF 、 SVC 、 VFPG
When the maximum output frequency is 599 Hz, the minimum carrier wave is 6 k.

Setting 0:
When the operating point is greater than the derating curve (when the operating
carrier wave is greater than the rated carrier wave), the rated current is constant, and
carrier frequency (Fc) output by the drive decreases automatically according to the
ambient temperature, overload output current and overload time. If overloads are not
frequency, and the concern is only about the carrier frequency operating with the rated
current for a long time, and changes to the carrier wave due to short overload are
acceptable, set to 0.
Refer to the following diagram for the level of carrier frequency. Take
VFD9A0MS43MNSAA in normal duty for example: ambient temperature 50°C, 100 % duty,
UL open-type, and independent installation. When the carrier frequency is set to 10 kHz, it
corresponds to 55 % of the rated output current; under the same conditions which
mentioned above but the ambient temperature 40°C, it corresponds to 75 % of the rated
output current. When the output current is higher than this value, it automatically decreases
the carrier wave according to the ambient temperature, output current and overload time.