Xylem IM167 R8 Aquavar CPC (Centrifugal Pump Control) - Manual (Page 130)

130
Sizing
The current ratings are the same regardless of the supply voltage within one voltage range.
To achieve the rated motor power given in the table, the rated current of the drive must be
higher than or equal to the rated motor current.
Note 1: The maximum allowed motor shaft power is limited to 1.5 ·
A
Times Rated HP. If
the limit is exceeded, motor torque and current are automatically restricted. The function
protects the input bridge of the drive against overload.
Note 2: The ratings apply in ambient temperature of 40º C (104º F).
Derating
The load capacity (current and power) decreases if the installation site altitude exceeds 1000
meters (3300 ft), or if the ambient temperature exceeds 40º C (104º F) or if 8 kHz switching
frequency (parameter 5001) is used.
Temperature Derating
In the temperature range +40º C…50º C (+104º F…122º F) the rated output current is de-
creased 1% for every 1º C (1.8º F) above +40º C (+104º F). The output current is calculated by
multiplying the current given in the rating table by the derating factor.
Example: If the ambient temperature is 50º C (+122º F) the derating factor is
100% - 1%/ºC x 10º C = 90% or 0.90.
The output current is then 0.90 x I
2N
or 0.90 x I
2hd
.
Altitude Derating
The derating is 1% for every 100 m (330 feet) above 3300 feet. If the installation site is higher
than 2000 m (6600 feet) above sea level, please contact the factory for assistance.
Single Phase Supply Derating
For 208…240 Volt series drives, a single phase supply can be used. In that case, the derating
is 50%, for the maximum amps and corresponding power rating of the three phase drive at
208-230 Volt input.
Switching Frequency Derating
If the 8 kHz switching frequency (parameter 5001) is used, derate HP and current output to
80%.
TECHNICAL DATA