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Motor Starters and Other Motor Control Products
Please visit our store. Links are provided below.
Motor Starters are our specialty for those control applications that are unusual.
Recent applications:
* Pump Protection - Undercurrent Protection to prevent cavitation with loss of fluid
in the pump. Eliminates the need for low level sensing electrodes.
* Automatic Timed Restart of Across-the-Line electric motor starters to restart
after under current trip, under voltage, over voltage, power loss, etc.
* Pump Pre-lubrication - solenoid valve opens reservoir to pour water into the
pump impeller before start. The pump will refill the reservoir upon start in preparation
for the next start.
* Field irrigation - Constant pressure regulation with variable frequency
drives and a 4 to 20 ma pressure transducer input. Drives will operate
independently of the field sprinkler system. Automatic high pressure shut down
when too many sprinklers close, low pressure restart when sprinklers open.
* Undervoltage and Overvoltage Protection - Motors can operate at nameplate
rating plus or minus 10%. Adjustable time delay on start is provided for voltage
dips caused by motor inrush current.
* Type 3R or Type 4 Enclosure with Service Entrance Rated Fusible Disconnect
and Lightning Arrestor.
* Variable Frequency Drives that may be placed in direct sun light with the addition
of forced ventilation or air conditioning.
* Reduced Voltage Starters to interface with your existing Cla-val pressure
reducing valve.
* Variable Frequency Drives will be interfaced with your facility controls.
Motor Control Products
Contactors
Lug Kits for Sizes 4 through 7 Contactors and Starters
Solid State Overload Relays
Current Transformers
Starters For Panel Mounting
Reversing Starters For Panel Mounting
Enclosed Starters, UL Type 1 Enclosure, w/Start and Stop Pushbuttons
Enclosed Starters, UL Type 1 Enclosure, with No Pushbuttons
UL Type 1 Enclosed Starters w/Hand-Off-Auto and Control Power Transformer
Enclosed Starters, Type 4/12 Enclosure, w/Start and Stop Pushbuttons
Enclosed Starters, Type 4/12 Enclosure, w/ HOA and CPT
Combination Starters w/Motor Circuit Protector Disconnect and HOA
Solid State Reduced Voltage Starters
Explosionproof Starters and Control
DC Motors and Drives
Variable Frequency Drives Online Store
Variable Frequency Drive Availability
Wye Delta Reduced Voltage
Pressure Transducers
Motor Control - Many items are listed that are not in our store.
You will also find additional notes on the products.
Pump Control Products
Simplex Starter Pump Control.
Duplex Pump Control.
Triplex Pump Control.
Domestic Variable Frequency Drive Pump Package.
Single Variable Frequency Drive Domestic Booster Pump Control.
Dual Variable Frequency Drive Domestic Pump Control.
Multi-motor Booster/VFD Pump Control.
Duplex VFD Chilled Water System Control.
Torque Control Soft-Starts
Power Quality Products
Automatic Load Tap Changing and Voltage Regulator Transformers
AC Line Reactors for Variable Frequency Drives up to 20 HP
Surge Suppressors
Ferrite Cores
Application Tips:
In 1952 the motor industry re-designed motors to reflect
advancement in winding insulation. The new insulations could
withstand higher temperatures and still give a nominal eighteen
year lifetime.
The re-design allowed a smaller frame that gave less surface heat
dissipation. Consequently, motors were designed to save raw material
costs while allowing higher internal temperatures. Thus the
"U-frame" was designed to replace the "original frame" motors.
In 1964 another re-design took place as insulation materials were
designed to withstand even higher temperatures. Raw material
costs were reduced as the smaller "T-frame" replaced the "U-frame."
Capabilities of the re-designed products also changed for the
reason that the new re-designed motors were also optimized, i.e.,
the original frame motor could easily develop more horsepower
than what the namplate was marked and the U-frame could
develop only slightly more horsepower than nameplated. However,
the T-frame motor was optimized so that it could develop no
more than what the nameplate required.
Thus, an original frame 10 horsepower motor might produce perhaps
12 horsepower, a 10 horsepower motor might produce 11 horsepower,
but a 10 horsepower T-frame motor will produce 10.0 horsepower.
When machinery was designed using original frame motors, if the
requirement was, for example, 11 horsepower, a 10 horsepower motor
was used with the knowledge that the motor would perform adequately.
When machinery was designed for use with a 10 horsepower U-frame
and the horsepower requirement wad 10.5 horsepower, a 10 horsepower
U-frame was used satisfactorily. If either the original frame was replaced
with a U-frame or a U-frame was replaced with a T-frame, the
replacement motor might overheat and destroy itself while
trying to handle the load.
Know thy motor! Measure and record running amps of all motors before
they need replacement. Select the replacement motor based on the
measured running amps. If an older style motor needs to be replaced
without the benefit of measured running amps, the general rule
is to replace an original frame motor with a U-frame of the next
higher horsepower rating and replace a U-frame with a T-frame of the
next higher horsepower rating.
In attempting to save energy by replacing a 10 horsepower original frame or
U-frame motor with an energy saving type, the question should be asked,
"How efficient is my new, shiny, premium efficient, 10 horsepower T-frame
motor when it burns up?"
When replacing the motor, if an existing sheave is worn then, if used
again, it may damage the shaft of the new motor. You may want
to replace the sheave also.
When replacing V-belts, use industrial belts rather than the automotive
type. The difference is the angle of contact on the sides of the belts.
An automotive belt will not have the proper lifetime if used on
an industrial sheave.
When replacing belts that are used with a multiple groove sheave,
always replace all the belts. If one new belt is used with one or
more old belts then the new belt will wear or break before the others.
The reason for that is that the old belts have been stretched and so
the new belt will be doing all the work.
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