Are energy meters suitable for operation with 60Hz mains frequency?

Affected are: U3089, U3589, U368x, U168x, U118x

The energy meters U3089, U3589, U3681, U3687, U3689 and U1681 are suitable for operation at 50Hz and at 60Hz mains frequency.

The bus-compatible energy meters for three-phase measurement can be operated at 60 Hz mains frequency under the following conditions:

• U1187, U1687 - at least 3 phase voltages must be present.
• U1189, U1689 - at least 2 phase voltages must be present

• Operation, as required by meter standard EN61036, with only one phase voltage in the 4-wire network or two phase voltages in the 3-wire network is not permitted.