Motor Protection; Operation Of The Switchgear - Wilo W-CTRL-CC Série Notice De Montage Et De Mise En Service

6.2.2 Motor protection

Overtemperature protection
Motors with WSK (thermal winding contact) signal
a winding overtemperature to the switchgear by
opening a bimetal strip contact. The WSK is con-
nected according to the wiring diagram.
Faults on motors that are equipped with a tem-
perature-dependent resistor (PTC) for overtem-
perature protection can be registered using
optional evaluation relays.
Excess-current protection
Motors on switchgears up to and including 4.0 kW
are protected by motor protection switches with
thermal and electromagnetic trip triggers. The
trigger current must be set directly.
Motors on switchgear from 5.5 kW are protected
by thermal overload relays. These are installed
directly on the motor contactors. The trigger cur-
rent must be set and is 0.58 * I
starting of the pumps used.
Installation and operating instructions Wilo-Control CC-Booster
. with the Y-∆
nom
All motor protection devices protect the motor
during operation with the frequency converter or
in mains operation. Pump faults which reach the
switchgear result in deactivation of the corre-
sponding pump and activation of the SSM. When
the cause of the fault has been rectified, it is nec-
essary to acknowledge the fault.
The motor protection is also active in emergency
mode, and leads to deactivation of the corre-
sponding pump.
In the CCe version, the pump motors protect
themselves by mechanisms integrated in the fre-
quency converters. The error signals from the fre-
quency converters are handled in the switchgear
as described above.

6.2.3 Operation of the switchgear

Operating elements
• Main switch on/off (lockable in "Off" position)
• The touch display (graphics compatible) shows
the operating statuses of the pumps, the control-
ler, and the frequency converter. Additionally, all
switchgear parameters can be set via the display.
The background lighting changes depending on
operating status: GREEN – Switchgear OK;
RED – Fault; ORANGE – There is still a fault but it
has already been acknowledged.
The operating elements are presented on the
touch display in relation to their context and can
be selected directly. Input fields for parameters
have a heavily marked frame. Softkeys have 3D
optics.
English
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