Xylem CentriPro Aquavar SPD20050 Directives D'installation, D'utilisation Et D'entretien page 11

POWER SUPPLY AND WIRING
Section 6
(continued)
Open Delta (consult factory)
This type of configuration is common on 230 volt systems. From time to time it may be encountered where
only single phase power is available and three-phase power is required. The technique uses two single phase
transformers to derive a third phase. When used to power a drive this configuration must be derated to about
70% of the single phase rating of one transformer. This system provides poor regulation and it is possible that
only the two line connected phases will provide power. In this case the drive must be derated to 50 % of its
rating. (Ex. A 20 HP 230 volt drive now becomes a 10 HP 230 volt drive.)
WARNING
WARNING
"Open Delta" power systems should be sized using the 50% derate factor. Consult factory.
Hazardous
voltage
Disconnecting EMC Filter and MOVs
For all controllers, if the line to ground voltage from the incoming power supply is greater than 300Vac then the
line to ground EMC filter components must be disconnected as described below. For 230V controllers, if the
line to ground voltage from the incoming power supply exceeds 300Vac then the line to ground MOVs must be
disconnected as described below. For 460V controllers, if the line to ground voltage from the incoming power
supply exceeds 550Vac then the line to ground MOVs must be disconnected as described below.
To disconnect the line to ground EMC filter components, locate
the jumper shown below. The jumper is on the left hand side of the
controller on the main board. Move to the disconnected position
shown to the right.
To disconnect the line to ground MOV protection, locate the jumper shown below. The jumper is located
between the input and output terminal blocks on the main board. Move to the position shown.
For Frame Size 1 Controllers: For Frame Sizes 2 and 3 Controllers:
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