Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
43
Power Protection
Module
Detect the quality of power supplied
to units by the user, detect the
voltage range of the power, the
imbalance rate of three-phase
voltage, phase sequence and phase
lack, and protect the units by
inspecting the quality of power.
Isolating Transformer
Transform the electrical system
applied by the user into AC220V for
supplying power to the control circuit.
It can isolate harmonic disturbance
between circuits and increase control
accuracy.
Intermediate Relay
The intermediate relay has the major
action of separating control circuit
from power circuit to avoid heavy
current of the latter from returning to
control circuit in case of any failure
and burning down PCB and other
important components.
Miniature Circuit
Breaker
Control on/off of circuit, and also has
the action of short circuit protection
on control circuit.
Current Transformer
Transform main incoming current into
low current to be accessed to the
thermal overload relay to enable the
thermal overload relay to judge
whether the current is too heavy so
as to play a role of current protection.
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