Electrical Connections - Mecc Alte ECP series Betriebs- Und Wartungsanleitung

ECO - ECP MANUAL
ENGLISH

ELECTRICAL CONNECTIONS

All electrical output connections are the responsibility of, and are
at the discretion of, the end user.
When making terminal box connections, all cable and terminal lugs
should meet the relevant standards of the country of final destina-
tion.
WINDINGS CONNECTION
All alternators feature both star with neutral (Y) and delta (Δ) con-
nections (table. 2 pag.31).
To reconnect from a star to delta connection (for ex. from 400V to
230V), modify the linking arrangements on the output terminal
board (see diagram on table 2 page 31).
It is not necessary to adjust the voltage regulator.
Standard alternators are equipped with 12 cables to offer different
voltages (ex.230 / 400 / 460 / 800V).
The alternator must always be earthed by sufficiently rated cable,
using one of the inside or outside terminals. For the electrical con-
nections use wires suitable for the power of the generator and con-
nect them to the terminal board as indicated on table 12 or 17.
After completing output connections (for tightening torque see tab.
24 pag. 43), ensure that the terminal box cover is securely in pla-
ce.
IMPORTANT: frequency variations
.
A standard production machine wound for 50 Hz can also function
at 60 Hz (and vice versa) by resetting the A.V.R. voltage potentio-
meter to the new nominal voltage value. When changing from 50
to 60 Hz the alternator power, and nominal voltage will increase by
20%, but the current does not change from 50 Hz value. Should
voltage stay at 50 Hz nominal value, then the output power may be
increased by 5% due to improved ventilation.
For machines wound for 60 Hz, changing to 50 Hz, the voltage
and power values have to decrease by 20% of 60 Hz value.
REGULATORS
(table 3 pag 31)
Either U.V.R.6/1-F and S.R.7/2-G regulators can be used on the
ECO-ECP series without affecting performances.
The U.V.R.6/1-F is a standard feature on the 38 - 40 - 43 - 46 mo-
dels whereas the S.R.7/2-G is standard on the 28 - 31 - 32 - 34
series.
The two regulators ensure the same level of performance but have
different signal systems and references.
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ECO-ECP iMANUAL December 2013 Rev. 03