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INSTALLATION

OPTIONAL

START

STOP

EMERGENCY

OPTIONAL

Note: It's necessary to use normal fuses or breakers to protect

the installation. Ultra-Rapid fuses are not necessary for

the SSW-03 operation, but they are recommended for

SCR protection.

The transformer "T" is optional and must be utilized

when the line voltage is different than the electronics

and fan voltage.

The isolation contactor "K1" is optional, and is not nec-

essary for the SSW-03 Plus operation. However due to

protection and safety reasons it's recommended. In case

of maintenance the input fuses must be removed for a

complete disconnection of the SSW-03 Plus from the

line.

For the integral motor protection it's recommended to

install one or more thermostats in the motor. If the ther-

mostat is not used, the external input error (DI3) from

SSW-03 Plus must be connected to +Vdc.

NOTE!

Contactor "K1" is necessary to protect the motor in case there

is a phase failure which is caused by damage in the SSW-03

Plus power circuit with the application of the power isolation

contactor. For motor connections, see Item 6.4.1.

EXTERNAL

ERROR

PLUS

WEG SSW-03 Plus Series User Manual

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