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5.1
ELECTRICAL CONNECTIONS:
ATTENTION!: the electrical connection must be made exclusively by technical personnel.
ATTENTION!: in the event of an existing system, make sure that the load connection is compatible with the ESC plus
connection.
Make sure that the cable is of a suitable cross section for the motor breakaway starting current and in single-phase
installations, that the capacitor is suitable for the motor to be installed.
A reduced cable section could cause dangerous overheating and, apart from dangerous voltage drops, damage to the actual
system.
ATTENTION!: with particular types of load , inverted motor rotation can cause elevated absorption that is capable of
damaging the machine and the system connected even after a very short time.
ATTENTION!: make sure to make the ground connection carefully using a yellow-green cable of the same section as
the cable used for the connection of the phases.
The failure to perform a correct ground connection can create serious risk to the operator.
Perform the electrical power connections as shown in FIG. 4a - 4b (only for 2-wire motors or pumps) - 5, making sure that the
motor phases are connected in the correct sequence.
5.2
ADJUSTMENTS:
5.2.1: ESC plus offers two methods for programming parameters for protection against overload and dry running operation;
manual (MA) and automatic (AT).
5.2.2 Manual mode (MA):
after ESC plus is powered up, the initial self-diagnostics phase is followed by of the software version and mains frequency,
and the user can press
display shows the current motor absorption value).
5.2.2.1: setting the rated current in manual mode (indicates the current value over which the overload protection trips):
after bringing the load to the maximum admissible absorption level in normal operating conditions, use key
parameter AA and press ■ to confirm. Press
value on display is permanent and press ■ to confirm. The display shows the flashing number 88 to confirm memorisation of
the value (if no operation is performed for more than 10 seconds the current value is memorised automatically). Ensure that
the measured current value is the rated value stated on the motor dataplate.
5.2.2.2: setting Cosϕ in manual mode: indicates the Cosϕ threshold value, below which the dry running alarm trips.
To calibrate, start up the motor (or pump) and bring it to the minimum admissible load in normal operating conditions, then
to select the parameter CP and press ■ to confirm.
press
▲
Press
until the display starts flashing, then press
▲
confirm. The display shows the flashing number 88 to confirm memorisation of the value (if no operation is performed for
more than 10 seconds the current value is memorised automatically).
5.2.3 Automatic mode (AT):
after ESC plus is powered up, the initial self-diagnostics phase is followed by display of the software version and mains
frequency, and the user can press
operation (the display shows the current motor absorption value).
Ensure that the measured current value is the rated value stated on the motor dataplate.
Press
to start the self-learning process for the current value and Cosϕ. The display shows the flashing text CL, after
▲
which press ■ to confirm automatic calibration (if more than 10 seconds pass before pressing ■ to confirm calibration, ESC
plus automatically memorises the current and Cosϕ values).
5.2.4: to restore ESC plus factory settings, press the three status keys (
flashing number 88. After that switch off the device and power up it again to start a new calibration phase.
ATTENTION!: this operation doesn't reset any error condition on ESC plus.
ENGLISH
to select manual mode MA followed by ■ to confirm and enable ESC plus for operation (the
▲
until the current reading starts flashing on display, then press
▼
▼
to select automatic mode AT followed by ■ to confirm and enable ESC plus for
▲
until the current value on display is permanent, after which press ■ to
■+
at the same time until the display shows the
+
)
▲
▼
7
to select
▲
until the
▲
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