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ES and DBR braking resistors

Cressall’s standard ranges of high capacity dynamic braking resistors (DBRs) for regenerative braking are low cost, easy to specify, quick to install and with ratings to suit inverter drives of any power. Our wide range of resistor technologies means that we can select the most technically appropriate and cost-effective resistor design for any application, whether continuous, intermittent or infrequent. We offer two product ranges ES and DBR ranges for powers up to 25kW

ES & BRAKING RESISTOR DESIGNS UP TO 25KW

Cressall ES and DBR braking resistors are based on two types of resistor elements:
HP Coils: spiral wire-wound coils on ceramic formers
ZC Coils: edge-wound coiled strip on ceramic formers
Both elements offer high overload capacity and rapid cooling.

The alloys used have low changes in resistance over the temperature range: no more than 18%, unlike designs using 304 stainless steel which can increase in resistance during the heating cycle by as much as 50%, resulting in lower braking currents and less effective braking.

  • Our ES range is usually available from stock so there’s no waiting for the right DBR
  • Spiral wire wound resistor element on ceramic former
  • Negligible noise
  • Low inductance
  • Temperature stable design, low increase of resistance value
  • Optional thermal switch
  • Terminal block mounted at one end of the enclosure, cover for terminal block, allow for ingress protection IP 20
  • Easy installation: Pre-drilled mounting holes, knock-outs in terminal cover, units suitable for horizontal or side mounting.
  • Wire or wound edge-wound strip resistor element
  • Temperature stable design, low increase of resistance value
  • Standard thermal switch
  • Option for IP21 drip proof canopies
    Integral terminal compartment
  • Easy installation: Pre-drilled mounting holes, knock-outs in terminal compartment, units suitable for horizontal or side mounting.
  • Option for 304 stainless steel enclosures
  • Dispatched from stock for common sizes, manufactured in a few days for other ratings.
Power
kW
DBR Resistance
Min. Value
Resistance
Tolerance
Dimensions
mm
Mounting
centres
Weight
Kg
        L W H w l  
0.6kW ESH 4.7Ω -0/+5% 288 121 141 236 92 1.4
1kW EST 6.8Ω -0/+5% 367 121 141 315 92 1.8
1.5kW ES1 10.0Ω -0/+5% 467 121 141 415 92 2.2
2kW EST2 3.3Ω -0/+5% 367 213 141 315 185 3
3kW ES2 5.0Ω -0/+5% 467 213 141 415 185 3.8
4.5kW ES3 3.3Ω -0/+5% 467 307 141 415 278 5.4
6kW ES4 1.5Ω -0/+5% 500 388 195 410 360 6.6
8kW ES8 0.75Ω -0/+5% 500 388 390 410 360 11.5
6kW DBR12 2.7Ω -0/+10% 766 330 140 700 290 16
9kW DBR18 2.7Ω -0/+10% 798 360 302 692 280 25
12kW DBR24 2.7Ω -0/+10% 798 360 302 692 280 33
18kW DBR36 1.5Ω -0/+10% 798 360 402 692 280 45
25kW DBR54 1.5Ω -0/+10% 798 542 402 692 462 60

 

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