Motor Protection; Insulation Monitoring (In The Cpi Version Only) - Wilo Control EC-Fire Installation And Operating Instructions Manual

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Menu no. / Description
7.04 Input of serial number (first 4 digits)
Value range: 0000 ... 9999
Factory setting: device ID
7.05 Input of serial number (next 4 digits)
Value range: 0000 ... 9999
Factory setting: device ID
7.06 Using EasyActions
Values: off, on
Factory setting: on
* The value range is dependent on the sensor
measuring range and other parameters!

6.2.3 Motor protection

Overcurrent
The pumps are protected against overcurrent for
versions up to 12 A by an internal current monitor,
the trigger current (rated current of the pump)
must be set directly on the EC printed circuit board
(Fig. 2-8, Item 8). For versions greater than 12 A,
the pumps are protected against overcurrent by
motor protection switches; the trigger current
must be set directly on the motor protection
switch (Fig. 2-8, Item 6). An overcurrent will cause
the pump to deactivate, display an error message
and activate the SSM and ESM (of the affected
pump) on the switchgear. After eliminating the
cause of the fault, the motor protection switch
must be switched on again for versions greater
than 12 A and the fault must be acknowledged on
the switchgear.
If the potentiometer is set to zero, the internal
motor current monitoring is not deactivated. This
setting on the potentiometer results in a pump
alarm every time the pump starts.
Deactivation of the pumps in case of overcurrent
by the internal current monitoring can be deacti-
vated for versions up to 12 A. To do this, cut
through the web between the rectangular cut-
outs (Fig. 2, 4, 6, Item 13) using side cutting pliers.
NOTICE
The deactivation of the internal current monitor-
ing is final and cannot be reversed
Minimum current
In switchgear up to the 12 A version, an option is
provided (which can be activated) for monitoring
the minimum current flow of the motors (uninter-
22
Display
rupted pumping of fluid by the pump). To do this,
internal motor current measurement should be
activated (menu 5.69 to "on") and the rated motor
current set using the potentiometers (Fig. 2 – 8,
pos. 8). The adjusted value can also be read via the
menu:
• Pump 1: Menu 4.25
• Pump 2: Menu 4.26
• Pump 3: Menu 4.27
RISK OF FATAL INJURY due to dangerous
electrical voltage!
The switchgear must be connected and
switched on whilst adjusting in order to read the
currently set value on the display.
There is a risk of fatal injury due to electric
shock!
Adjustment must only be carried out by a quali-
fied electrician using an insulated screwdriver!
If the current falls below the minimum current
value, this leads to deactivation of the pump, an
error message on the switchgear, and activation of
the SSM and ESM (of the affected pump). After the
reason for the fault has been rectified, the fault
must be acknowledged on the switchgear.

6.2.4 Insulation monitoring (in the CPI version only)

For application in the mains form IT (French: Isolé
Terre), the device can be fitted with an insulation
monitoring device at the factory. On every pump
that is switched on, the insulation between the
active conductors and the earth potential is mon-
itored.
If an insulation fault occurs, the affected pump
cannot be switched on. An error message is dis-
played and the SSM and ESM (of the affected
pump) are activated. After the reason for the fault
has been rectified, the fault must be acknowl-
edged on the switchgear.
WILO SE 06/2024