Powerohm's Type CR Case Resistors can be used
in any AC or DC power circuit. Units are most commonly used for light-duty braking
of variable frequency drives, heating and any other low wattage load applications.
The Type CR resistors are suitable for intermittent and
continuous duty applications requiring relatively high resistance and low wattage.
The compact size of this unit makes it ideal for an installation where space is
a premium. This unit can withstand extreme shock, qualifying it for nearly any
high vibration application.
Powerohm's Type SR & SXR Smoothwound Resistors
can be used in any AC or DC power circuit. Units are most commonly used for light-duty
braking of variable frequency drives, small horsepower motor control, space heaters
and any low wattage, high resistance load application.
The
Type SR & SXR resistors are suitable for continuous duty applications where
high resistance and low current are required. These units are designed to withstand
considerable shock, making them suitable for high vibration applications.
Powerohm's Type VR Ventwound Resistors can
be used for any AC or DC power application. Units are most commonly used for braking
of variable frequency drives, motor control, load banks and neutral grounding
applications.
The Type VR resistors are suitable for continuous
duty applications where low current and relatively high resistance are required.
These units are designed to withstand continu-ous current ratings between 2.5
and 16.7 amps, and resistance values ranging between 170.0 and 1.0 ohms, respectively.
Units have a rated temperature rise of 375ºC above ambient temperature, which
is in accordance with NEMA standards.
Powerohm's Type WR Wirewound Resistors are
designed for low current applications ranging from 1.0 to 32.0 amps continuous,
and resistance values ranging between 250.0 and 0.25 ohms, respectively. Units
have a rated temperature rise of 375ºC above ambient temperature, which is
in accordance with NEMA stan-dards.
These units can be
used for any type of AC or DC power application, including motor control, dynamic
braking, neutral grounding and load testing. The corrosion resistant Type WR resistor
will withstand considerable shock and vibration, qualifying it for use in most
harsh environments.
Powerohm's Type ER and ERB Edgewound Resistors
can be used for any AC or DC power application. Units are most commonly used for
VFD braking, motor control, load banks and neutral grounding applications.
The Type ER and ERB resistors are suitable for continuous duty
applications where low resistance and high current are required. The high element
mass allows these units to withstand high current, intermittent duty applications.
This characteristic, combined with the high-temperature ceramic insulation, makes
the edgewound ideal for neutral grounding applications, which reach temperatures
as high as 800°C.
Powerohm's grid and ribbon resistors can be
used for any AC or DC power application. Units are most commonly used for motor
acceleration and braking, but are also suitable for load banks, harmonic filtering
and some neutral grounding applications.
The combination
of stainless steel elements and rugged features make these units suitable for
use in almost any environment. These designs are ideal for high vibration areas
such as overhead cranes operated in steel mills and manufacturing plants.
The Powerohm Type BM Braking Module is available
in three different voltage classes including 240, 480
and 600 volts with continuous current ratings available
in 50 and 115 amps. The Type BM Module can be
used in conjunction with any AC Drive not only
to avoid over-voltage trips, but to greatly
improve the performance of the drive system.
The use of Braking Modules and resistors
increase the braking torque capability of a
variable frequency drive, allowing faster and
more controlled deceleration times. To
accommodate higher horsepower system
requirements beyond the capability of a single
Module, the Modules are all Master/Slave
programmable.
The Powerohm Variable Braking Resistor, Model VBR, is a portable test unit that provides selectable steps of resistance to analyze your braking requirements through a wide range of horsepower. Simply connect the VBR to your drive or braking module, select the optimal resistance value specified by your drive, and cycle the braking application.
The digital readout of the VBR will accurately display the duty requirement based on the actual application. This resultant is crossed to chart for permanent resistor selection.
