21.12.98 Operating manual
04_GB ACP 3000 — 0.37–15.0
41
Berges electronic • D–51709 Marienheide-Rodt • Tel. 02264/17-0 • Fax 02264/17126
◊ Value range: 0–5 Default: 0
This parameter increases motor voltage at low speed as a percent of nominal voltage to
increase the starting torque of the motor. Voltage boost will linearly decrease with increas-
ing speed. Default Boost settings vary between models.
Care must be exercised with this adjustment. Too much boost may cause excessive
motor currents and motor heating. Use only as much boost as is necessary to start
the motor. AUTO-BOOST may be selected at parameter
51-VSEL
to provide the opti-
mum value of boost to suit the load automatically. Some 2-pole (3000 RPM synchro-
nous speed) have proven to require less than the default value of
52-BOOST
.
◊ Value range: 0.00–25.00% Default: 8.00%
1 Linear V/Hz, with constant boost fixed by
52-BOOST
.
2 Mixed (linear/quadratic) V/Hz, with Auto-Boost, typical of pumping applications.
3 Mixed V/Hz, with constant boost fixed by
52-BOOST
.
4 Quadratic V/Hz, with Auto-Boost, for fan-law applications.
5 Quadratic V/Hz, with constant boost fixed by
52-BOOST
.
Figure 5.2
52-BOOST – Voltage Boost [%] 1P
DATA
CODE
DESCRIPTION
ATTENTION!
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