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G8MNY > TECH 22.04.24 00:01l 123 Lines 5931 Bytes #999 (0) @ WW
BID : 5934_GB7CIP
Read: GUEST
Subj: APC 1500 UPS
Path: IW8PGT<LU4ECL<VK2RZ<I0OJJ<GB7CIP
Sent: 240421/2202Z @:GB7CIP.#32.GBR.EURO #:5934 [Caterham Surrey GBR] $:5934_GB
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (New Dec 16)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
This is some info I have found out on this American Power Conversion UPS.
(Uninterruptable Power Supply) I is much same as the "APC Smart 900" but
does more power as well as a step up or down mains conditioning feature & is
fan cooled.
SCHEMATIC v v v
ÚÄÄÄÄ¿ÚÄÄÄÄÄ¿ÚÄÄÄÄÄÄ¿ ÚÄÄÁÄÄ¿ÚÄÄÄÁÄÄÄÄ¿_ÚÄÄÄÄÄÄÄÄÄÄÄ¿ ÚÄÄÄÁÄÄÄ¿ ÚÄÄÄ¿
In>´12A ôSpikeôMains ôON ORôNORMAL/ ÃÄ´ Large ô Smpsu ÃÄ´BatÃ>
IEC³Trip³³Clamp³³Filter³³³ FAIL³³UP/ DOWNÃÄ´Transformer³³ÀÄÄÄÄÄÄÄÙ ³³Mon³
ÀÄÄÄÄÙÀÄÄÄÄÄÙÀÄÄÄÄÄÄÙ³ÀÄÄÄÄÄÙÀÄÄÄÄÄÄÂÄÙ ÀÄÄÄÄÄÄÄÄÄÄÄÙ³ÚÄÄÄÄÄÄÄÄ¿³ÀÄÄÄÙ
³ÚÄÄÄÄÄÄ¿ ³ÚÄÄÄÄÄÄÄ¿ À´SM Sine ÃÁ<Batteries
À´In MonÃ> ôOut MonÃ> ³Inverter³
v ÀÄÄÄÄÄÄÙ ³ÀÄÄÄÄÄÄÄÙ ÀÄÄÄÄÄÄÄÂÙ
Out ÚÄÄÄÁÄÄÄ¿ ÚÄÄÄÄÄÄÄÄÄÄ¿ ÚÄÄÄÄÄ¿ ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ^
4x<ÄÄ´LOAD ONÃÄ´Filter CapÃÄ´I MonÃÄÄÄÄÙ >´uProc ControlÃ>
IEC ÀÄÄÄÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÄÄÙ ÀÄÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
The control sorts out what is the required state for the 3 relays (CAPITALS)
from the various monitoring function inputs. It also predicts battery life.
It is a switched UPS system, which means there is a very short break (10ms?) in
the output when the supply goes out of limits (fails) & the inverter cuts in.
INVERTER
The 24V volt inverter uses a powerful bridged Class D 16 FET amp at many kHz.
³º²Û²º³ Phase 1 +24V HF pulses
³º²Û²º³ fed via the 2
~~~~~~~~~~~~~~~~~~~ FET outputs to
³º²Û²º³ each side of
³º²Û²º³ Phase 2 the transformer.
~~~~~~~~~~~~~~~~~~~
.-.
/ \ These pulses do not get through
| | the Transfromer with mains capacitor
| | | so the resultant filtered output is
| | a rounded mean of those needle
\ / pulses to make a 50Hz sine wave.
'-'
There are several feedback loops that control the output.
1) The 50Hz is locked in phase to the incoming supply when it is present so
there is less of a voltage jump on changeover.
2) Output Voltage feedback ensures regulated voltage.
3) Over current alarms & then kills the inverter, protecting it from damage.
BATTERIES
These are 2x 17AH Batteries, accessed from the pull of front pannel. As with
most UPSs of this sort they are literally CAINED to get the performance! So
don't expect them to last long. On full load discharge in something like 4 min
the batteries are spent, & possibly dammaged! On light loads 1 hr is possable.
This UPS has an earthed battery system, there is no connection to the mains as
same are. So it is safe to add external large fused batteries. eg. 2 120 lorry
batts fused @ 60A beeteen their 12V Link.
There is DC Safety link on the rear panel to disconnect the inverter.
FRONT PANEL
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ [] []reduce .ú. [] ³
³ [] ( 1 ) [] ³
³ [] [] normal test [] ³
³ [] [] ³
³ [] [] [] .1. [] [] ³
³ [] boost On ( 0 ) Smart Replace [] ³
³ Load Battery 'ú' Boost Battery Battery³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
The green mains ON LINE LED will be flashing in test node (if
there is mains present), & the yellow ON BATTERY LED will be on.
After the 10 second test it will switch back to the mains if it
is OK, & the green mains ON LINE LED stays on & out goes the
yellow ON BATTERY LED.
If mains is just goes a bit to low the yellow SMART BOOST LED
lights after a second of inverter fill in power.
If the battery will not accept a charge the red REPLACE BATTERY
LED is lit up.
Bargraphs: The battery status bargraph indicates the battery voltage & is a
good indication of the condition.
The mains load bargraph lights up as the output loading is
increased to the maximum 1500W load. (200W/0.8A per LED)
Alarms: The beeper sounds 4 beeps every 30 seconds after mains fails
(1/30 seconds initial delay option SW3).
And when the battery is too low (2min/5min warning) rapid pulse.
And if the load is excessive.
Mains Fail: As options set near instant changeover to synchronised inverter on
failure, e.g. under/over volts, under/over frequency.
Mains Reset: After 5 seconds of good mains, near instant change back to mains.
Power off: Just throw the rear ENABLE switch to off. This disconnects the
output & stops all battery drain.
Pressing the (0) button only works with no mains, otherwise you
get a briefly interrupts the output only (dirty changeover).
Charging: If just charging is needed then leave the rear ENABLE switch on
without pressing (1) test button.
As with most things with uProc control that can go wrong & a full power off
with battery disconnection may be needed in the worst case. (e.g. before you
buy a new set of batteries!) Then do a fresh power up on recharged batteries
with a 30% mains load to recalibrate the uProc's battery predictions during the
self test.
See my buls on "APC Smart 900","META HF Melenium 810 UPS", "Lead Acid
Batteries", "Constant Voltage Transforemers" & "Mains Power Protector".
Why don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
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