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RA MODEL
Home » Products » WIRE WOUND POWER RESISTORS » RA MODEL
GENERAL CHARACTERISTICS
The ROP power resistor units are formed by stainless steel frames on which the resistive wire is wound, assembled in packs and connected in series or parallel (depending on the final ohm value), mounted and fixed inside galvanised steel casing / with an open bottom and side cooling slots. They are used in electrical traction, in starting and adjustment of large motors, in electric braking devices and in load systems for generators, test benches, harmonic filters and grounding of the star point. The high power value and the large amount of energy that can be dissipated are obtained by the significant content of winding alloy and by the high impulse temperatures that can be tolerated without alteration or damage. The high level of insulation is obtained through use of top quality ceramic materials.
ELECTRICAL CHARACTERISTICS
OPTIONAL
ELECTRICAL CHARACTERISTICS
- Standard tolerance: ± 5%
- Temperature coefficient: ≤ 100 ppm/°C
- Maximum applicable voltage: 1000 V
- Level of protection IP22 standard – IP23
- Connection directly on the terminals of the resistors from the open bottom
OPTIONAL
· Application of protective thermostat
· Ohm values off standard compatibly with production
· Intermediate sockets
· Off standard tolerances
· Powder paint in different RAL colours on request
· Special casing for power up to 140 kW
· IP level of protection provided on request (compatibly with production)
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