Motor Protection And Activation Types - Wilo Sub TWU 3 HS Serie Einbau- Und Betriebsanleitung

English
Use a round cable to extend the power supply
cable; this ensures that the cable inlet on the
frequency converter seals properly.
1. Measure with an insulation tester (measuring
voltage is 500 V) to measure the resistance of the
power supply cable and the motor winding.
The resistance must not fall below the following
values:
• At initial commissioning: min. 20 MΩ
• During further measurements: min. 2 MΩ
If the insulation resistance is too low, it is possi-
ble that moisture has penetrated into the cable
and/or motor. Do not connect the pump again
and consult the manufacturer.
2. Loosen the two screws on the housing bottom
and remove the cover.
3. Loosen the two cable inlets on the housing
bottom.
4. There are two connection terminals in the fre-
quency converter: MOTOR and LINE. Place the
threaded cable connection on the power supply
cable and pass it through the cable inlet on the
side of the "MOTOR" terminal.
5. Screw the threaded cable connection into the
housing, fastening the power supply cable.
6. Pull out the terminal, connect the power supply
cable to the "MOTOR" terminal in accordance with
the wire allocation shown below, and then replace
the terminal.
4-wire connection cable
Wire colour
Black
Blue or grey
Brown
Green/yellow
7. Fasten the protective earth conductor to the
earth terminal above the "MOTOR" terminal. To do
this, use a terminal end.
Mains/frequency converter connection
RISK of fatal electric shock
The power supply cable on the mains side
has to be connected first to the frequency
converter and only then to the power supply
separator/switchbox. Failure to comply with
this sequence results in the full mains voltage
being present at the open cable end. There
is a risk of fatal injury! Always comply with
this sequence and have a qualified electrician
perform the electrical connection.
Use a round cable for the power supply cable;
this ensures that the cable inlet on the frequen-
cy converter seals properly.
40
Terminal
U
V
W
PE
1. Place the second threaded cable connection on
the power supply cable and pass it through the
opening on the side of the "LINE" terminal.
2. Screw the threaded cable connection into the
housing, fastening the power supply cable.
3. Pull out the terminal, connect the power supply
cable to the "LINE" terminal and then replace the
terminal.
4. Fasten the protective earth conductor to the
earth terminal above the "LINE" terminal. To do
this, use a terminal end.
5. Replace the cover on the housing bottom and
screw the two screws back into the housing.
6. Now lead the power supply cable to the power
supply separator (main switch) or to the switch-
box. Make sure that the power supply cable is laid
securely and does not pose a danger (e.g. loops
that someone could trip on).
7. Connect the power supply cable to the power
supply separator (main switch) or the switchbox.
5.5.4. Connecting the monitoring devices
The monitoring functions are implemented via
the frequency converter and do not have to be
connected separately.
Overview of monitoring devices
Function
Undervoltage
Overvoltage
Short-circuit
Temperature (frequency converter)
Dry run
Leakage*
Key:
• • = built-in
• - = to be provided by customer
• * = leakage detection is switched off in the factor
and has to be activated via the menu
Please also refer to the "Setting the operating
parameters" section.
• In the "...-HS-ECP" variant with an external
frequency converter, the error messages are dis-
played on the frequency converter's display and
are confirmed/reset accordingly.
• In the "...-HS-I" variant with an internal frequency
converter, the pump is automatically switched off
when an error occurs. The pump is only switched
back on once the system is reset via the main
switch.

5.6. Motor protection and activation types

5.6.1. Motor protection
The motor protection is integrated in the fre-
quency converter:
• In the TWU 3-...-HS-ECP, the relevant value has
to be set via the frequency converter.
• In the TWU 3-...-HS-I, the value is preset.
INSTALLATION
HS-ECP HS-I
• •
• •
• •
• •
• •
• -
WILO SE 05/2014 Ed.04 DIN A4