WEG SSW7000, User Manual

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SSW7000 | 3-7
About the SSW7000
The start of multiple SSW7000 is done sequentially and/or simultaneously. For the simultaneous start condition
of two or more SSW7000, the PFC capacitor banks will be enabled at the same time after the start of the last
motor. As described by IEC 60871-1, the peak value of the capacitor bank inrush current must not exceed 100
times the value of the rated current. If the Inrush current is higher, a reactance must be installed in series with
each capacitor bank. The reactance will reduce the peak current and attenuate the effect of transient overvoltage.
Discharge of the Power Factor Correction Capacitors
When the power factor correction capacitor is disconnected from the line, a residual voltage remains on it. When
the capacitor is reconnected, such residual voltage can cause an inrush current of up to twice the value obtained
when the capacitor is discharged during reconnection, thus reducing its useful life. In order to prevent the increase
of the inrush current, the capacitors must be internally equipped with a discharge device able to reduce the
residual voltage to a value close to zero after its disconnection.
Parameter P0280 - CAPACITOR DISCHARGE TIME defines the time the SSW7000 waits for the discharge of the
power factor correction capacitors so as to allow a new connection. P0280 can be programmed with values
between 60 to 600 seconds, and the standard value is 300 seconds (NBR5282 standard).
3.2. SSW7000 IDENTIFICATION LABEL
The SSW7000 identification label is affixed inside the product cabinet. This label contains important information on
the SSW7000.
Figure 3.9. Identification label of SSW7000 (example).
Other important information can be found on the label of the Power Arms.
Figure 3.10 Identification label of Power Arm (example).
Nominal Voltage
SSW7000 Model
WEG Part Number
Nominal Current
Manufacturing date
(15 corresponds to
week and H to year)
Serial Number