WEG SSW7000, User Manual

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SSW7000 | 3-2
About the SSW7000
3.1. MAIN CHARACTERISTICS
The soft-starter SSW7000 has four panel versions: two IP41 versions, one IP54 version and one NEMA version.
The NEMA and IP54 are compacts versions – SSW7000C, 36” wide. The operation is the same for all versions.
The specific differences among the versions will be detailed in this manual.
3.1.1. Disconnect Switch
The SSW7000 with frames A, B and C have a medium voltage input disconnect switch that allows the electrical
disconnection of the internal circuit of the SSW7000 from the power supply.
This disconnect switch is interlocked with the panel door, so that the door can only be opened when the
disconnect switch is also open. When open, the connections on the upper side of the fuses are grounded.
DANGER!
Even with the disconnect switch open, voltage may still be present on the side of medium voltage
power supply of the disconnect switch. When maintenance is required on the medium voltage side
of the disconnect switch, the medium voltage power supply must be disconnected and grounded
in a point before the SSW7000.
DANGER!
The SSW7000 has another power supply for the low voltage control. Make sure there is no voltage
before touching any component
3.1.2.
Fuses
The SSW7000 with frames A, B and C have R-type medium voltage fuses against short circuit in the panel, motor
and cables up to the motor.
3.1.3.
Protection Relay
The SSW7000 with frame D has a protection relay to detect overcurrent and short circuit in the panel, motor and
cables up to the motor.
3.1.4. Line Contactor
The SSW7000 with frames A, B and C have a line vacuum contactor with utilization category AC-3, which makes
it possible to disconnect the SSW7000 power section whenever the motor is deactivated.
The line contactor is driven by the SSW7000 control electronics.
3.1.5. Line Circuit Breaker
The SSW7000 with frame D has a removable vacuum circuit breaker which capacity to close and interrupt short-
circuit currents, complying with IEC 62271-100 and with the standards of the main industrialized countries.
This circuit breaker is sized to withstand direct on line starting and the SSW7000 rated current at full load. It also
allows the implementation of a direct on line starting logic.
The line circuit breaker is driven by the SSW7000 control electronics.