Motor Protection And Activation Types - Wilo Drain TS 50 Série Notice De Montage Et De Mise En Service

English
• The version with free cable ends is connected to the
electricity supply by connecting them to the switch
box. The wires of the connection cable are assigned as
follows:
6-wire connection cable
Wire no.
1
2
3
green/yellow
4
5
5.6.4 Monitoring device connections
Units with a 3- or 4-wire connection cable have an
integrated switch for temperature control. This
switches off the product when it overheats and
switches it back on automatically after it has cooled
down.
For units with a 6-wire cable, the temperature control
system must always be connected separately!
When used in explosion hazard areas, the tem-
perature monitoring device must be connected in
such a way that, in the event that the tempera-
ture limiter has triggered, it can only be restarted
after the "release button" has been activated
manually.
This means that units with an integrated switch
are not ex-approved!
Beware of connecting incorrectly!
WSK is connected single-ended to protective
earth (PE). Therefore, the control voltage in use
must be galvanically isolated and not grounded!
For constructional reasons, safe function of the
named protection equipment is only guaranteed
with Wilo Drain Control switching devices. All
other switching devices must be supplemented
by the SK 545 monitoring device.
For this reason, no warranty claims can be accepted for
damages to the winding resulting from unsuitable
motor monitoring.

5.7 Motor protection and activation types

5.7.1 Motor protection
The minimum requirement for three-phase motors is a
thermal relay/motor protection switch with tempera-
ture compensation, differential triggering and an anti-
reactivation device in accordance with VDE 0660 or the
appropriate national regulations.
If the product is connected to electrical systems in
which faults frequently occur, we recommend install-
ing additional protective devices at the customer
(overvoltage, undervoltage or phase failure relays,
38
Terminal
U1
V1
W1
PE
WSK/;
WSK
lightning protection etc.). We also recommend install-
ing an earth leakage circuit breaker.
Local and national regulations must be adhered to
when connecting the product.
5.7.2 Activation types
Direct activation
At full load, the motor protection should be set to the
rated current shown on the type plate. At partial load,
we recommend that the motor protection be set 5%
above the current measured at the operating point.
Starting transformer/soft start
Motor protection should be set to the rated current
when fully loaded. At partial load, we recommend that
the motor protection be set 5 % above the current
measured at the operating point. Start up time with
reduced voltage (approx. 70 %) is a maximum of
3 seconds.
Operation with frequency transformers
The product may not be operated on frequency trans-
formers.
Products with plugs/switching devices
Insert the plug into the plug socket and press the on/
off switch or let the product switch on/off automati-
cally by means of the attached level control system.
Switching devices can be ordered as accessories for
products with free cable ends. In this case, also
observe the instructions enclosed with the switching
device.
Plugs and switching devices are not flood-proof.
Note the IP protection class. Always install
switching devices in such a way that they are
protected from flooding.
6 Startup
The "Start-up" chapter contains all the important
instructions for the operating personnel for starting up
and operating the product safely.
The following constraints must be adhered to and
monitored:
• Type of installation
• Operating mode
• Minimum water coverage / max. submersion
If the machine has not been operated for an
extended period, these constraints must also be
checked and any discovered faults rectified.
This manual must always be kept either by the prod-
uct or in a place specially reserved for it, where it is
accessible for the entire operating personnel at all
times.
In order to prevent damage or serious injury when
starting up the product, the following points must
always be observed:
WILO SE 07/2014 V4.1