Specifications

5.5 Voltage Transformers

Connection of voltages higher than the rated voltage, that

is specified on the M550 data label, is possible using

external voltage transformers. These

transformers must be at least Class 1 accuracy. The

secondary of these transformers must have the same

nominal voltage as that specified on the data label on the

side of the M550. e.g. If the M550 has a voltage specified as

110 Volts Line to Line, then a Transformer with Ratio of

6600/110 volt can be used, once this ratio has been pro-

grammed into the M550 (See section 4.21.) But if the ratio

was 6600/400V the unit would have to be returned to the

factory or distributor to have internal component changes

to cater for the 400 Volt input.

M550MAN.PM5 01/08/101, 12:4848