Batboard

Need a UPS for MTR2000. Installed new emergency generator, that has already smoked 2 MTR2000 power supplys when it switches from generator back to utility power.
Any suggestions for a UPS just for this one MTR2000, it supposed to draw only 5.5 AMPs. Don't feel comfortable in using an off the shelf computer UPS.
Any suggestions???

Before exploring UPS systems, I'd find out why your genset's transfer switch is making before breaking. That is a dangerous condition (not just to equipment).

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. "MTR2000 power supplys, it supposed to draw only 5.5 AMPs. "

This is a switching PS and draws 15 or more amps surge on powerup.

Repair the Xfer switch and use a real battery bank for backup- not a UPS.

Can we say "bandaid on a bullet hole" here?

Kim,

I think a voltage Surge transferring from Back-Up Generator to Primary Electric Company Power Lines is nailing your MTR2000 Switching Power Supply each time.

Here's a website http://www.elect-spec.com/ to find a solution to the Spike/Surge problem. I think this company can solve your Power Company voltage problems. Do not forget that the MTR2000 Base Station draws 15 Amperes on initial Power Up if you should call them on their 800 Toll Free Number.

Dan

Look out for # 1 but Don't step in # 2 while looking out for # 1!

Assuming the genset is the typical setup, I don't understand why the access to utility power following the momentary outage when the transfer switch opens should result in any more surge into the MTR power supply than simply plugging it in and turning it on.

While you cannot diagnose anything very well from a distance, I'd bet the price of a good ice cream cone that the transfer switch is making before breaking, and that this is producing a momentary summation of generator and utility voltage. If that is so, this is a situation that is quite dangerous, with implications far beyond the MTR. So I'd get someone in who is capable of hooking the system up to a high speed recording volt meter and confirming that the transfer switch is either working properly or not, and if the latter, get it fixed.

Quite separately, I have always advocated a form of standby power system that does two things: it isolates the station from the loss of power that would otherwise been experienced both on LOOP-then-gen-start and transfer, and then later on gen-shutdown and transfer. Particularly for computer-based stations (like Quantar and MTR) and computer-based consoles, this avoids the hassles of boot failure. In addition, such a system keeps everything running if the genset either goes into recrank (such as by starting and transferring, but then safetying off on low frequency after a slam transfer) or simply refuses to start and transfer at all, long enough to get the Highway Department to bring up a skid-mount and get it running.

jim wrote:Repair the Xfer switch and use a real battery bank for backup- not a UPS.

I agrre with Jim here. I have 14 mtr2000 rpts in the area and I run them on 24vdc with a cheap 24vdc battery charger.This is the cheapest way to go..The other best way is not to use a UPS but instead an inverter. Trace makes a very good brand.

If it is a higher end transfer switch, you might want to turn on the SYNCHRONIZE feature that makes sure the E and N sources are in sync before transfering. I've had this trouble with some Motorola equipment blowing fuses if the ATS doesn't sync up. For instance, no synchronization could mean you let through a double peak (two positive sine ways say, one after another), and thus a DC component into the power supply. Inductive components are especially conductive to DC.... poof.

RF Dude