Rev. 1.2 of 12.2020
13
Fig. 3.3. Scheme of the MZSW module supplied through the contactor and frequency converter
For starting motors of higher power, star
–
delta changeover switches consisting of
contactors (e.g. DILM) and time relays are used.
Depending on the power of the fan and its operating mode, the following modules,
performing tasks listed below, may be applied:
•
Direct activation
(
up to 5.5 kW
)
–
MZSW-ZB
•
Activation through a star-delta system
(
from 7.5 kW to 75 kW
)
–
MZSW-GT
•
Activation of first/second gear of the fan
(
Dahlander system
)
–
MZSW-2B
•
Activation in any direction
–
MZSW-2K
•
Activation of first/second gear of the fan
(
Dahlander system
)
in any
direction -
MZSW-2B2K
•
Activation and supplying through a frequency converter
–
MZSW-FC
Besides the distribution of electrical power needed for operation of the fans, the
modules also monitor the operation status and possible failures of the power circuit.
Operation confirmation and generic failure signals are transferred to the Control Panel.
FREQUENCY
CONVERTER
Содержание ZUP
Страница 6: ...Rev 1 2 of 12 2020 6 2 13 Declaration of Performance ...
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Страница 43: ...Rev 1 2 of 12 2020 43 Annexes 14 13 ZUP Assembly and On site Launch Instruction Manual ...
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