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User Guide
EC-C1700B-420
Product overview
20 |
©
Danfoss | June 2023
Electric device power connection diagram
Protections and limits for options:
The options for EC-C1700B-420 have certain protections and limits that affect their function. The
difference between protections and limits is that protections stop all high voltage functions of the
electric device immediately, whereas limits only limit the functions instead of stopping them.
Overcurrent and short circuit trips protect the device from overcurrent and short circuits on the AC side
of the device. First protection is a configurable software based overcurrent trip, where the trip level can
be set by the user. Second protection is a hardware based overcurrent trip with fixed trip current level of
750 A
(reaction time <15µs). In most cases, the hardware overcurrent trip protects the device also
peak
from short circuits. In case even the hardware overcurrent trip fails, the final protection is a short circuit
trip that has maximum current value of 3810 A
In the following Sections, the protections and limits are listed for each option.
Motor Control (+MC option, motor and generator control)
Motor control option is used to control the speed and torque of electrical machines and also converting
alternating current (AC) from electrical generator to direct current (DC) for energy storage.
Motor Control application example
Motor Control characteristics
•
Controllable motor types
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•
•
Control principle
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Reference types
•
•
(self-limiting, reaction time <2µs).
peak
Synchronous permanent magnet motors
Asynchronous induction motors
Special features to control Danfoss synchronous reluctance assisted permanent
magnet motors.
Rotor flux oriented current vector control
Torque reference motor control
Speed reference motor control
Generator control mode for regulating the DC-link voltage
BC454142332191en-000101
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