Created Date: November 12,2014

Created by: Tinker

as long as I size the resistance and wattage identical to AD's?

Since the AD resistors GS-45P0-BR and GS-42P0-BR seems to be just resistors (i.e. no thermostat or other special features) I can see little reason you couldn't substitute (but see below) . Particularly if you are maintaining the same "wattage ", if you were to go with a higher wattage and/or fan cooled resistor and then tried to increase the braking level or duty cycle, the brake transistor might be at risk, but if you are just trying to match the same performance as the GS-45P0-BR/GS-42P0-BR , then I don't think there is likely to be any real problem.

Resistors with the same DC values but different construction might have different inductance and thus different AC performance, while one is nominally dealing with "DC " it will be chopped and thus the AC performance will be a factor, but I suspect the difference between different resistors would be negligible in most cases.

If this were a high volume production application it might be worth getting one of each AD resistor, an oscilloscope and a reasonably high frequency current probe and comparing the AD option with yours, but for a one off installation I wouldn't bother if I didn't already have the instrumentation.

TLDR: "is there any reason I can't ": yes there is a potential "reason ", but probably not any good reason.

Created Date: November 13,2014

Created by: LWgreys

The braking resistors for these small drives are small and can be located externally by extending the wires. I have GS2 5HP drives with braking resistors and I mounted them on the outside of the control panel. All I did is extend the resistor leads to the VFD using the same size wire as the resistors has. Also I used stand-off spacers about an inch long to give the small resistors more breathing room to dissipate the heat.

Created Date: November 14,2014

Created by: sii

The braking resistors for these small drives are small and can be located externally by extending the wires. I have GS2 5HP drives with braking resistors and I mounted them on the outside of the control panel. All I did is extend the resistor leads to the VFD using the same size wire as the resistors has. Also I used stand-off spacers about an inch long to give the small resistors more breathing room to dissipate the heat.

That was suggested to me yesterday by tech support over the phone. Aren't those wires at DC bus voltage? and now exposed to possible contact and damage?

Created Date: November 15,2014

Created by: LWgreys

I used THHN 600 volt wire for extending the wires. It's what I use on all my braking resistors. Distances I'm using range from a few feet to 30 feet which are the braking resistors for my high-speed position servos. The voltage rating of 600 VAC is RMS voltage which would be about 848 volt DC. Well over the DC bus voltage of the drive. The wire could handle transient DC voltage as high as 2400 VDC.