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Neutral Grounding Resistors
Grid Resistors
Edgewound Resistors
Wirewound Resistors
Helidyne Resistors
Sales Literature
Price Quotation Request Form
Technical Information and Quote Specifications
Authorized Sales Representatives
CONTACT US
Phone:
(216)
573-7600 or
(216) 642-1230
Fax:
(216)
573-5953
E-Mail:
Industrial Power Resistor Sales
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Resistor Technical Information
and Quotation Specifications
Following are typical industrial resistor
applications and additional information needed by Avtron to quote.
(Contact us or use the
Price Quotation Request Form.)
Once answers are received an Avtron Sales
Engineer can determine the resistor assembly most suitable for your
application.
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Industrial Resistor Applications |
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A.
NEUTRAL
GROUNDING RESISTORS
Resistor inserted between neutral and ground of a
transformer or generator serves to limit fault current to a safe predetermined level.
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Information needed to quote:
- System Voltage
- Line-to-Neutral Voltage
- Current Rating
- Maximum Time On
- Open or Enclosed
- Current Transformer Ratio (if applicable)
- Grounding Transformer KVA Rating (if applicable)
- Special Options
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Options
include:
- Current Transformers
- Potential Transformers
- Disconnect Switches (oil or air
insulated)
- Overcurrent Relays
- Aluminum or Stainless Steel
Enclosures
- Special Paint
- Seismic Qualified Units
- High Altitude Ratings (above 6000
feet)
- Hazardous Location Ratings (Class 1,
Group D, Division II)
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B.
MOTOR CONTROL RESISTORS
B.1.
Dynamic Braking Resistor for AC or DC Drive. (Electrical
ratings are usually specified by drive manufacturer.)
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Information needed to quote:
- Ohms
- Watts
- Enclosed? If yes, indoor or outdoor?
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AC Wound Rotor Induction Motor (also referred to as a slip
ring motor). Resistor is wired into the motor secondary slip rings and provides a soft
start as resistance is removed in steps. |
Information needed to quote:
- Application (ex: hoist, bridge, trolley, pump, conveyor, etc.)
- Motor H.P.
- Secondary volts and amps (from motor nameplate)
- Starting torque (if known)
- Number of speed points (ex: 4 steps of resistance = 5 speeds).
- NEMA duty class (if known)
- Enclosed? If yes, indoor or outdoor?
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| B.3.
AC Squirrel Cage Motor. Resistor is used as a ballast for
soft starting (also called a reduced voltage starter). |
Information needed to quote:
- Application (ex: hoist, bridge, trolley, pump, conveyor, etc.)
- Motor H.P.
- Normal line voltage
- Full Load Amps (F.L.A. from motor nameplate)
- Indoor enclosure is standard.
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| B.4.
DC Series Wound Motor. Current limiting resistor is wired
to the field to control motor current (torque) for starting or stopping. |
Information needed to quote:
- Application (ex: hoist, bridge, trolley, pump, conveyor, etc.)
- Motor H.P.
- Normal line voltage
- Full Load Amps (F.L.A. from motor nameplate)
- Starting torque (if known)
- Number of speed points (ex: 3 steps of resistance = 4 speeds).
- For Dynamic Lowering (typically a hoist) - need the name of the control manufacturer.
- Enclosed? If yes, indoor or outdoor?
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