Motor Protection - Wilo TOP-S Instrucciones De Instalación Y Funcionamiento

English
• Double pumps: provide a separate mains connection cable and a separate fuse
on the mains side for both motors of the double pump.
• The pumps can also be used without restriction in existing installations with and
without residual-current-operated protection switch switches. When dimen-
sioning the residual-current-operated protection switch, consider the number
of pumps connected and their motor currents.
• When pumps are used in systems with water temperatures above 90 °C, a suit-
able heat-resistant supply cable must be used.
• 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 outside
diameter 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 con-
nections should be blanked off with the sealing plates provided, and screwed
tight.
• Commission pumps only if they are fitted with the correct modular cover. Check
that the cover seal is correctly seated.
• Earth the pump/installation in accordance with the regulations.

7.2.1 Motor protection

DANGER! Risk of fatal injury!
Improper electrical connections pose a risk of fatal injury due to electric
shock.
If the mains leads and WSK lead are brought together in a 5-core cable, the
WSK-lead must not be monitored using a protective low voltage.
CAUTION! Risk of damage to property!
If the thermal winding contact (WSK, terminal 10 and 15)) of the pump is not
connected to a motor protection system, the motor can be damaged due to
thermal overload!
36 WILO SE 08/2020