CA7 Contactors up to 75 HP
Dual power terminals speed wiring.
CA7-30 through 85 contactors are designed with two power terminals
for all three poles. This simplifies power wiring of interconnected
contactors in reversing, reduced voltage and two-speed applications.
Simplified wiring means less labor and less cost
Sprecher + Schuh contactors are also available with electronic DC coil for direct control from a PLC.
The electronic DC coil has low power consumption designed to control electric motors and other loads and is especially alligned to the specific requirement of electronic control circuits. The low power consumption of 1.7 allows direct control through PLCs without the need for interposing relays. Power dissipation is greatly reduced limiting the heat effect in control panels.
Series CA6 Contactors up to 700 HP.
The modern contactor for demanding applications
Sprecher + Schuh’s CA6 contactor line combines the simple function of our popular CA7 contactor series with the rugged performance demanded in this middle horsepower range. On average these contactors are 50% smaller than traditional contactors in this size class.
A broad selection for middle horsepower applications
The CA6 contactor family consists of a wide range of amperages in several frame sizes. This line is ideally suited for demanding applications such as steel mills, rock quarries, mines or for any middle horsepower application where a sturdy, durable contactor is needed.
Built in Safety Features
The CA6 contactor series has a built in safety feature that disengages the coil contacts and locks them in place when the contactor cover is opened for inspection. Conversely, when the contactor is energized, the cover cannot be removed. This feature ensures the current carrying components are power free during maintenance or replacement operations. Contact replacements can be installed quickly and safely, extending the life of the contactor.
Rugged and reliable
CA6 contactors conform to UL508, as well as IEC 947 and can be operated at rated voltages up to 600V (UL) and 1000V (IEC). High thermal and switching capacities guarantee reliable operation and long life. CA6 contactors are listed in CSA Certified Elevator Equipment for heavy duty use in elevators, refrigerators and heating installations in Canada.
Arc quenching extends contact life
All CA6 contactors are designed with sophisticated arc quenching techniques that extinguish damaging breaking arcs quickly.
Electronic coils offer many advantages
Behind the attractive outward appearance of the CA6 contactor are advanced engineering solutions that offer convenience and savings. The CA6-115-EI through 420-EI incorporate an electronically controlled coil that reduces pick-up currents by 60% on average. Holding current is also reduced. The CA6 electronic coil also permits direct connection to a PLC.
Reversible coil provides total flexibility
When shipped, both coil connections are normally located at the top
of the contactor in preparation for mounting an overload relay at the
bottom. For multi-starter panels, however, the coil can be reversed.
CA7 contactors can either be ordered with the coil reversed or may be
easily reversed in the field.
Shuch overload relays
CT7N Bimetallic Thermal Overload Relays
Ensure reliable protection with current-limiting calibration &
ambient temperature compensation.
Sprecher + Schuh has always paid particular attention to the
subject of motor protection. This concern is reflected in our CT line
of thermal overload relays that include many standard features not
available with traditional overload protection devices. And, CT7N
overload relays are designed to mount directly to the load side of
Sprecher + Schuh CA7 Contactors.
Consistent and reliable protection
The consistent high quality of Sprecher + Schuh thermal overload
relays is ensured by a complex current calibration procedure performed
after each unit is at full operating temperature. Calibration is
performed at the largest and smallest current the overload can handle.
The accurate time/current characteristic curve obtained in this manner
guarantees reliable motor protection every time.
Superior Class 10 characteristics
Today's T-Frame motors have less copper and iron that the old
U-Frame motors that were popular when traditional Class 20 overload
relays were designed. For this reason, faster Class 10 overloads like
the CT Series have been recognized by many motor manufacturers as the
ideal type to assure optimum protection of "T" frame motors.
Protection from single phase conditions
A unique feature not found in traditional thermal overload relays
provides accelerated tripping under single phase conditions. This is
accomplished with a special "differential tripping"
mechanism built into CT7N.