Brochure

Complete specifications of SOLICON DRC Series available at: motion.crydom.com
Crydom's innovative Motion Control
solutions leverage the advantage of
having an all solid state design making
them ideal for motor and motion control
applications where precise control, long
life and higher PWM frequencies are
essential to achieve high performance
and reliable operations. Functions
such as start/stop control, reversing
control, soft start and speed regulation
are available in versatile packages.
motion.crydom.com
Crydom, global expert in solid state
switching technology, combines
technology and innovation to provide
customers a wide range of standard
Solid State Relays and Solid State
Contactors, and specializes in custom
designed solid state switching solutions
for any load control application.
Crydom is a brand of CST.
www.crydom.com
Custom Sensors & Technologies
(CST) is a specialist in sensing, control
and motion products. Through its
brands, BEI Kimco, BEI Sensors, BEI
PSSC, Crouzet, Crydom, Kavlico,
Newall and Systron Donner Inertial, CST
offers customizable, reliable and
efficient components for mission-
critical systems in Aerospace &
Defense, Transportation, Energy &
Infrastructures, Medical, Food & Bever-
age and Building Equipment markets.
www.cstsensors.com
AC 3 phase motors up to 5 HP are
frequently used in control
technology for an infinite range of
applications. A contactor is the
electrical switch used to control the
power to a motor for every
start/stop operation and therefore it
is subject to significant wear.
/ > / > / >
M
3
U1 V1 W1
L1 L2 L3
Contactor
Circuit
Breaker
3 Phase
AC Motor
/ > / > / >
M
3
Forward
Contactor
Circuit
Breaker
3 Phase
AC Motor
Reverse
Contactor
L1 L2 L3
U1 V1 M1
A1
A2
N.O. N.C.
In some cases the
direction of the motor
(forward/backward)
needs to be controlled; in
such cases 2 contactors
need to be used together
with an interlock to
prevent accidental
maneuver.
The coil input provides the magnetic force to close
the contacts and may be driven by either an AC or DC
supply, low voltage (24 VAC, 24 VDC) or high voltage
(120 VAC, 230 VAC)
Additional auxiliary contacts can be used to provide
memory to control circuits. When energized, the
contactor switches the auxiliary contact,
maintaining a circuit closed or open depending on
the type of contact (normally open or normally
closed).
Basics of AC 3 Phase Motor Control