Description
MOTOR PROTECTION
RELAY
UNT-MMI intelligent MCC (Motor Control Center) protection
management device is the new-generation digital-type intelligent
MCC control protection management device with strong interference
resistance developed by Baoding UNT Electric Co., Ltd. after
studying similar products in foreign countries and summarizing the
typical design experience of a lot of MCC electric systems in
China, which is based on the design characteristics of MCC circuit
and for adapting to the intelligent trend of secondary equipment in
electric system.
This product is mainly used in low-voltage motor control circuit,
so as to achieve various protection, monitoring and control
functions for motor, and achieve the remote monitoring on motor
circuit via field bus.
Features of
Device
With the **-bit industrial microprocessor adopted, the speed is
high and the precision is also high.
The true RMS algorithm is adopted for AC sampling, so as to fully
reflect the impact imposed by harmonic wave current.
The self-adapted frequency-changing sampling technology is adopted,
which is suitable for frequency converter circuit.
Several flexible control modes are available, and control
authorities are interlocked.
The device adopts the small-sized design, and the installation mode
is flexible.
Metal casing design is adopted, so that external electromagnetic
interference is effectively shielded.
The LCD based on Chinese characters and rich menu is adopted, and
the interface is user-friendly.
The switch quantity input circuit adopts the design of high
interference resistance, so as to ensure long transmission distance
and high reliability.
The internal control contacts are equipped with protection circuit,
and the contacts can be effectively protected without additional
surge absorber.
Protection
Over-current protection, Motor shaft lock protection, Current
unbalance protection, Earth fault, Over-voltage protection,
under-voltage protection
Phase sequence protection, phase loss protection, over points off
protection, under-run protection, long start-up time protection, tE
time protection
Communication
Profibus *
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