Table of Contents
Advertisement
Product Description
3.1.4
Motor protection switch
3.1.5
Frequency converter
3.1.6
Electrical connections
BA-STE-RS, 26.09.2014
The reversing contactor combination (17) is not available in the
version with frequency converter, see chapter 3.1.5.
In order to prevent damage from overload, a thermomechanical
motor protection switch (16, bimetal) triggers the shut down of the
macerator motor based on a preset heating curve when the stored
current consumption limit is exceeded.
The motor protection switch is not available in the version with
frequency converter, see chapter 3.1.5.
For motor outputs greater than 7.5 kW, a frequency converter (28)
with release contactor (27) is supplied instead of the reversing
contactor combination and the motor protection switch. Current
measurements and changes of the direction of rotation are then
handled by the frequency converter (28) according to the
evaluation performed by the PLC (14).
A frequency converter (28) can also be supplied for lower motor
outputs as an option.
For motor outputs greater than 7.5 kW, the frequency converter
(28) can be replaced by the reversing contactor combination (17)
with motor protection switch (16) upon special request, depending
on the specific circumstances at the installation site. However,
Börger GmbH expressly recommends the use of a frequency
converter (28), at least for motor outputs greater than 7.5 kW.
The standard version of the STE-RS control unit is supplied with
cable glands according to DIN EN 50262 (9, 10, 11), IP 68, and
serial feed-through terminals (20).
The enclosed circuit diagram provides a detailed description of the
cabling to be laid.
Extensions for measuring devices to be evaluated are possible,
see chapter 3.1.9.
www.boerger.de / www.boerger.com
25
Advertisement
Table of Contents
