English
50
WILO SE 02/2014
6
Description and function
For a description of the product, see also Fig. 1a to Fig. 1g.
6.1
Description of the product
6.1.1
Function description
The Smart control system, controlled by a microcontroller, is used to
control pump systems with up to 4 single pumps. The control variable
of a system is measured with corresponding signal transmitters and
controlled load-sensitively.
In the SC version, all pumps are fixed speed pumps – the control is a
2-point control. Non-controlled peak-load pumps are switched on
and off automatically depending on the load requirement.
In the SC-FC version, the controller acts on a frequency converter,
which in turn influences the speed of the base-load pump. A modifi-
cation of the speed changes the volume flow and thus the power out-
put of the pump system. Non-controlled peak-load pumps are
switched on and off automatically depending on the load require-
ment.
In the SCe version, each pump has an (integrated) frequency con-
verter, with only the base-load pump undertaking the speed control.
6.1.2
Set-up of the control device
The set-up of the control device is dependent on the performance of
the pumps that are to be connected, and the version (SC, SC-FC, SCe),
see
Fig. 1a: SCe WM
Fig. 1b: SC direct starting WM
Fig. 1c: SC star-delta starting WM
Fig. 1d: SC star-delta starting BM
Fig. 1e: SC-FC direct starting WM
Fig. 1f: SC-FC direct starting BM
Fig. 1g: SC-FC star-delta starting BM
It consists of the following main components:
•
Main switch:
Switches the switchgear on/off (item 1).
•
Human-machine interface (HMI):
LCD for displaying operating data (see menus), LEDs for displaying the
operating status (operation/fault), operating knob for menu selection
and parameter input (item 2).
•
Base board:
Printed circuit board with microcontroller; version corresponding to
device version (SC/SC-FC or SCe) (item 3).
•
Fuse protection of drives and the frequency converter:
Fuse protection of the pump motors and the frequency converter.
In DOL version devices: Motor protection switch.
In the SCe version: Circuit breaker to protect the pump mains power
cable (item 4).
•
Contactors/contactor combinations:
Contactors for switching on the pumps. In SD version devices, includ-
ing the thermal tripping devices for excess current protection (set
value: 0.58 x I
N
) and the time relay for the star-delta switching
(item 5).
•
Frequency converter:
Frequency converter for load-sensitive speed control of the base-
load pump – only in the SC-FC version (item 6).
•
Motor filter:
Filter for ensuring a sinusoidal motor voltage and for suppressing
voltage peaks – only in the SC-FC version (item 7).
•
EMC filter:
Filter for suppressing EMC interference on mains side – only in the
SC-FC version up to 7.5 kW (item 8).
Содержание SC-HVAC SC
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