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Pyramid ps25 phase 111 power supply out put ok no load, put on load out put drops to 3 volts, light load my other supply handles it ok and it's only a 20 amp unit.

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Here is a site that suggests things to check, and has information about this device.
http://forums.qrz.com/showthread.php?t=170144
Apparantly, the schematics are not easy to get, and maybe not that accurate, so not sure if even they will help much. You might try to ohm out the regulators and pass transistors like the article suggests, I would think that's your best bet.
Good luck, thanks for using FixYa, and hope this helps.

Posted on Sep 01, 2010

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Posted on Jan 02, 2017

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Trc 482 what do I change if I want to plug it into the wall instead of my truck


OK... LOOKS like this is a 'vintage' CB Radio??

Some recommend just a 3 AMP 12 volt supply BUT PLEASE don't settle for that! I will highly recommend THESE BETTER SUPPLIES instead!

Pyramid PS8KK and/or PS9KK Power Supply! (sorry about the CAPS)

Because EACH TIME YOU TRANSMIT ~ there is a 'instant' current DEMAND of FIVE AMPS! A THREE AMP supply will "sag" in output voltage and AMPS under that load.

So each time you transmit your supply stressesfrom that 'hit' of 5 AMP demand... not good for a 3 amp supply.

And as your supply tries to recover, THAT could cause a voltage "spike" that can be quite destructive.

With CB radios and other items, it's best to have that extra cushion (if you will) of 'reserve' amps available!

Also note the cigarette power jack? THAT can be quite handy too for other items ~ OR you can add the MALE jack to your radio power wires for quick disconnect!

Now this 6 amp supply will cost slightly more than the 3 amp versions... but it will be SO worth it in the long run ~ BECAUSE your supply will run cooler and it's ready to give you the FULL POWER when you need it most.
cb-ay53xupi2pin52cfytgihs5s-2-0.jpg

ps2-ay53xupi2pin52cfytgihs5s-2-1.jpg
https://www.rakuten.com/search/Pyramid%20PS8KX

Pyramid 6 Amp Power Supply PS8KX eBay

ANTHONY

Dec 24, 2017 | Radio Communications

1 Answer

I just bought a double head notcher with 2-10hp 3 phase motors they were wired 480 volt I only have 230 volt 3 phase from a converter. I put 2 starters to match voltage and motor size.what's the prob.


talk with an electrician but I think that if you have 3 phase motors on 480 volts you will need an inverter that will handle 480 volts
as it stands now you only have 230 volts for 3 phase and that means that there is insufficient power to run the motors
however in cases such as this , a long talk with an electrician could save lots of money

Aug 03, 2015 | Air Tools & Compressors

1 Answer

Lights dim


if the grinder just hums then it is a 240 volt unit and will burn out on 110 volts
the garage power should be the same as the house 240 v
but if only 110 v that indicates that it is 1/3 of a 3 phase power supply
if it has just started then get a electrician in to check the reason for the power drop

Jun 26, 2015 | Heating & Cooling

1 Answer

Where can i obtain a wiring diagram


A one phase 3 wire system has a center tap. Two hots and a neutral. Typical 120/240 volts.
A three phase 4 wire system has Three hots in a Y or Delta. The Y system has three hots and the neutral comes from the center of the Y, this is the neutral and grounded conductor, 120 volts from hot to ground and 208 volts hot to hot. In a 3 phase system the voltage is not doubled hot to hot as in a single phase system because the hots are 120 degrees phased from each other and the square root of 3 is the factor, multiply the 120 volts by 1.73 to get 208 volts hot to hot. Multiply 208 by the reciprocal of 1.73 and get 120 volts. Your exact application is not given so it is not known. A delta system is a triangle and the angle of each triangle is a hot wire, one angle would be grounded or the center tap of one of the sides of the triangle. Y is the configuration of the windings of the alternator or transformer and Delta is the configuration as a triangle of the windings of the alternator or transformer where the power supply is.

With a three phase home service, you can only connect two hots from your single phase generator, and the neutral. One of the house's hot does not get connected and any three phase loads in the house should be switched off and kept from energyzing or a circuit breaker or fuse serving that 3 phase load may trip.
Only one power supply can be connected at a time. The power company power must not be connected at all while using an alternate power supply unless your power supply has means to synchronize the alternating cycle.

It is adviced that the loads be kept within 10% of their rated voltage, especially motors.

May 04, 2015 | Heating & Cooling

1 Answer

What is the difference between neutral and phase?


neutral is the white wires on each power phase phase is the number of hot lines to run pump 120 volt 1 phase 220 volt 2 phase 3 phase has 3 lines to it let electrician handle this

May 31, 2012 | Waterway 5 Hp 230 Volt 2 Speed Side...

1 Answer

Power supply seems to work fine until it has a load on it. Puts out 13.8 volts, but will only handle about 2 amp load before the overload protection kicks in. My 2 amp load test is an 1157 light bulb and...


Note: I'm answering your post with the assumption that you plan on using this power supply with a computer. If this is not your intention, please disregard my solution attempt.

You likely already know this, but if you are powering a computer you're going to need a power supply with more wattage. I would recommend nothing less than a 350 watt power supply.

Follow this link to calculate how much power you need to run your computer: http://www.extreme.outervision.com/psucalculatorlite.jsp

If you're not ready to give up on your 270 watt power supply, then remove all PCI/PCI-E devices, USB ports, extra fans, non-boot hard drives, extra DVD/CD drives etc. one at a time until the computer powers up. Anything you can do to reduce the load on the power supply will help.

Good luck and thanks for using FixYa.

Mar 08, 2011 | Pyramid PS14KX 270-Watt Power Supply

1 Answer

Pyramid PS-52KX. Getting 24 volts DC on my output. I am knowledgeable in this department. I need to know what ac voltage should I be reading off of my transformer? I can't find a good schematic...


Sounds like the regulator goin. I've read when they go bad it will go full voltage which is 37vdc.
Looks like they use the LM723 regulator. I'm no expert, but may be that simple.
Here's a link to a schematic. Hope it helps
http://www.pyramidcaraudio.com/manuals/PS52K.pdf

I have a PS14KX. It won't handle any load. If you have any ideas let me know

Mar 05, 2011 | Pyramid - PS52KX 40 Amp Power Supply Car...

1 Answer

How can i get single phase power from my 3 phase generator


I have not wire this myself
Wiki says under heading of single-phase:
http://en.wikipedia.org/wiki/Three-phase_electric_power
Single-phase loads may be connected to a three-phase system in two ways. A load may be connected across two of the three phase conductors or a load can be connected from a live phase conductor to the system neutral. Single-phase loads should be distributed evenly between the phases of the three-phase system for efficient use of the supply transformer and supply conductors. Where the line-to-neutral voltage is a standard utilization voltage (for example in a 230 V/400 V system), individual single-phase utility customers or loads may each be connected to a different phase of the supply. Where the line-to-neutral voltage is not a common utilization voltage, for example in a 347/600 V system, single-phase loads must be supplied by individual step-down transformers.

So it sounds like you take 2 legs of the 3-phase.
or
Take one leg of the 3-phase and connect to neutral ... neutral could be a ground rod.

I would put a meter on that circuit before hooking up my power saw.

Nov 17, 2010 | Electrical Supplies

1 Answer

Ps 52 kx power supply will not hold load


thank you for your help . I have already fixed the power supply I double checked the transisters and found three bad so I replaced all the power transisters and it is fine . thanks again bob

Nov 17, 2008 | Pyramid - PS21KX 20 Amp Power Supply Car...

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