Harrington Hoists and Cranes MR Trolley - (MR2) User Manual
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3.5.9 The Run Lamp display provides trolley “RUN” status. Table 3-6 shows the various “RUN” displays.
Table 3-6 Run Lamp
3.5.10 All of the dual speed trolleys have speed/frequency ranges that can be customized to a specific
application. Refer to Table 3-7 for specific trolley speed/frequency ranges. To set custom speeds for
an application, follow the procedure in Table 3-8.
Table 3-7 VFD Speed & Frequency Ranges
Product
Code
Trolley Speed (ft/min)
VFD Frequency (Hz)
Range*
Low
High
Low (d1-01)
High (d1-02)
230V
460V
230V
460V
MR2010SD
Low
8.0
80.0
6.7
6.7
63.0
63.0
Std
13.0
80.0
11.0
11.0
63.0
63.0
MR2020SD
Low
8.0
80.0
6.7
6.7
63.0
63.0
Std
13.0
80.0
11.0
11.0
63.0
63.0
MR2030SD
Low
8.0
80.0
6.7
6.7
63.0
63.0
Std
13.0
80.0
11.0
11.0
63.0
63.0
MR2050SD
Low
8.0
80.0
6.7
6.7
63.0
63.0
Std
13.0
80.0
11.0
11.0
63.0
63.0
*Low = The minimum and maximum speed/frequency range (10:1 ratio).
Std = The factory standard minimum and maximum speed/frequency range (6:1 ratio).
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