Motor Protection - Wilo TOP-Z Serie Instrucciones De Instalación Y Funcionamiento

English
• All connection cables must be installed so that they do not touch the pipe and/
or the pumps or motor housing.
• To ensure protection against dripping water and to provide the threaded cable
connection with strain relief, (PG 13.5), a connection cable with an outer diam-
eter of 10 - 12 mm should be used, and fitted as shown in fig. 5. In addition, the
cable near the screwed connection should be bent into the form of a drip loop,
from which any accumulated drips will fall. Unused threaded cable connections
should be blanked off with the sealing discs provided, and screwed tight.
• Commission pumps only if they are fitted with the correct module cover. Check
to ensure the cover seal is correctly seated.
• Earth the pump/installation in accordance with the regulations.
7.2.1 Collective fault signal (SSM)
DANGER! Risk of fatal injury!
Improper electrical connections pose a risk of fatal injury due to electric
shock.
If the mains leads and SSM lead are brought together in a 5-core cable,
the SSM-lead must not be monitored using a protective low voltage.
For pumps with terminal boxes of type 5 and 7 (fig. 4), a collective fault signal
"SSM" for connection to the building automation system is available as a poten-
tial-free normally closed contact (max. contact load 250 VAC/1A). The contact
opens if the integral motor protection trips to disconnect the motor. After a
manual reset (fig. 4, item 4) at the pump, the contact closes again and the fault
signal is acknowledged.

7.2.2 Motor protection

CAUTION! Risk of damage to property!
If the thermal winding contact (WSK) of the pump is not connected to
a motor protection system, the motor can be damaged due to thermal
overload!
36 WILO SE 12/2013