MESTA UPS3000 Manuale utente

MESTA ELECTRONICS, INC.

Uninterruptible

Power

Supply

Owner's Manual

MODELS: UPS3000, UPS3500, UPS5000

11020 Parker Drive N. Huntingdon, PA 15642

412/754-3000

SAVE THESE IMPORTANT

SAFETY INSTRUCTIONS

Models: UPS3000 - UPS5000

Table of Contents

1. INTRODUCTION....................................................................................................................1

2. GENERAL DESCRIPTION.....................................................................................................2

3. INSTALLATION......................................................................................................................4

4. OPERATING PROCEDURE...................................................................................................7

5. RS232 INTERFACE...............................................................................................................8

6. STORAGE............................................................................................................................11

7. INTERNAL MAINTENANCE.................................................................................................12

8. BATTERY INFORMATION...................................................................................................13

9. TROUBLESHOOTING .........................................................................................................16

APPENDIX A. UPS SPECIFICATIONS BY MODEL................................................................17

APPENDIX B. OPERATING PROCEDURE FOR OPTION A ..................................................21

APPENDIX C. DRY CONTACT STATUS RELAYS OPTION A................................................22

APPENDIX D. WARRANTY/SERVICE AND REPAIR..............................................................23

List of Illustrations

Figure 1: UPS Battery Tray Configuration................................................................................15

List of Tables

Table 1: UPS Software Parameters ...........................................................................................9

Table 2: RS232 Technical Specification Summary ..................................................................10

Table 3: RS232 9-Pin D-Connector Pinout...............................................................................10

Models: UPS3000 - UPS5000

(Page Intentionally Left Blank)

1. INTRODUCTION

Thank you for buying the Mesta Electronics UPS! You are now an owner of a TRULY

UNINTERRUPTIBLE POWER SUPPLY. No other system on the market can match your UPS.

SAVE THESE INSTRUCTIONS - This manual contains important instructions that should be followed

during installation and maintenance of the UPS and its batteries. Please read this manual thoroughly

before installation and operation of your new unit.

WARNING - Your UPS contains nine 12 volt batteries wired in series providing a total nominal DC

voltage of 108 volts. This voltage is used to power the UPS when the AC utility is not available.

Because of the presence of this high voltage energy source, even when the power cord is not plugged

in, certain precautions must be taken to avoid possible injury should you need to unlock and enter your

unit. Before attempting to unlock or enter your unit, read the sections of this manual on "Internal

Maintenance" and "Battery Information" for important safety precautions.

WARNING - Always store the keys that unlock the unit in a safe place. DO NOT keep the keys in the

lock of the unit where someone unqualified or unsupervised may inadvertently open the unit.

2. GENERAL DESCRIPTION

As computers become increasingly fundamental to today's businesses, protection against power

disruptions has never been more critical; and since vital data and hardware are threatened by routine

sags, surges, spikes, and transients -- as well as major blackouts -- protection must be constant and

instantaneous.

The Mesta UPS system provides this kind of comprehensive protection by maintaining a clean, well-

regulated flow of power to critical loads, regardless of the quality of incoming AC line power. It remains

in a constant state of readiness, so there is no time delay in compensating for AC line failures.

Unlike many competitive units, the Mesta UPS system is truly uninterruptible. It remains in a

constant state of readiness, so there is no time delay in compensating for AC line failures. In contrast,

other systems may exhibit delays of 4 to 10 milliseconds -- long enough to cause serious losses of

data or equipment.

Unique microcontroller intelligence plus state-of-the-art components and manufacturing procedures

yield outstanding capabilities in the Mesta UPS system. Using a proprietary pulse-width-modulation

technique, the microcontroller directs the system to produce a very low harmonic, high quality sine

wave output -- perfectly matched in phase and voltage to the AC power line. The result is a completely

seamless transfer of the load from the inverter to the utility and vice versa during a power disturbance

or outage.

This zero-transfer-time feature, combined with a high frequency switching and custom magnetics,

results in a high operating efficiency of at least 93 percent and a total harmonic distortion of less than

one percent.

Because the microcontroller continually monitors the load and the power line, the Mesta UPS system:

•Starts under load with no damage to itself or the load.

•Handles nonlinear loads -- loads which require users of other UPS systems to buy more

expensive, higher rated units than they would otherwise need.

•Provides current limiting and short-circuit protection. The UPS provides a 300% overload

current limit for a finite time, and a short circuit placed directly across the output will not

damage the UPS or the load, even if the power is coming directly from the AC line.

The Mesta UPS system also features:

•High Reliability thanks to the large scale integration and generous overrating of all power

components. Its modular design provides for quick and easy maintenance should it ever be

needed.

•A more compact footprint and lighter weight than ferroresonant UPS units, because of its

custom transformer and intelligent operation.

•Quiet operation 1KVA through 2KVA units produce only 35 dBs of audible noise, a level that

is virtually indistinguishable from ambient noise. (In contrast, most other similarly sized

UPS units are many times louder, generating from 45-75 dBs.)

Straightforward controls make the Mesta UPS easy to operate, and audible and visual signals provide

clear indication of system status. In the event of a power line outage, the system:

•Sounds an intermittent alarm after five seconds. (The five-second delay eliminates

nuisance alarms from minor fluctuations.)

•Supplies power at maximum load for 7 to 20 minutes, depending upon model. (See

specifications for your specific model.) These times will be longer at lesser loads or with

back-up from external batteries.

•Sounds a continuous 30-second alarm when the usable battery has declined to 10 percent

of its full capacity.

•Automatically goes into a state of inactivity once regulated output can no longer be

maintained, waiting for the return of AC line availability. During this state of inactivity the

logic will continue to look for the AC power to return in order to restore normal operation. If

no AC power returns, however, after 2 hours the entire system will shutdown.

Once the AC power returns, the system's microcontroller employs optimum charging techniques to

extend battery life while minimizing charging time. The microcontroller follows a unique algorithm by

which it regulates the charging process and enables a minimal recharging time.

YOUR INVESTMENT IN MESTA'S TRULY UNINTERRUPTIBLE POWER SUPPLY INSURES THE

VALUABLE POWER PROTECTION YOU NEED.

3. INSTALLATION

Unpacking: Before unpacking your unit, examine the shipping carton for damage. If there is any

obvious damage, report it immediately to the dealer or carrier. If no damage is found, unpack the unit

and inspect it for shipping damage. Again, in case of any damage, report it directly to the dealer or the

carrier.

Environment: The MESTA UPS is designed to be used in an environment with a temperature range of

0-40°C and relative humidity of 0-95%, without condensation. The site should not be excessively dusty

or dirty. Clearances should be provided to the front and back of the unit so as not to block air inlets

and outlets. Also, keep the top of the unit clear of objects. The unit should never be used to sit or

stand on.

Location of Unit: The UPS should be in close proximity to the protected equipment: the longer the AC

wire runs, the more voltage drop and more risk of noise getting back into the system there are.

Voltage/Power Rating: Make sure that the voltage and power rating match the available line voltage

and load requirements. This can be done by comparing the input and output information printed on the

rating plate of the UPS with your requirements.

Power Cord Plug-in: Having verified voltage and power ratings, you are now ready to plug the UPS

into the AC power. Your unit will either have a detachable power cord or one that is fixed to the UPS.

(If you have a detachable cord, it was shipped with the unit. Only use this cord with your UPS. Do not

substitute other cords in its place as their current ratings may not be sufficient for your UPS needs.

Plug the detachable cord into the UPS input receptacle.) Now plug the AC power cord into the utility

receptacle at your facility.

UPS Power On: Having plugged your UPS into the AC utility, you may now turn on your UPS using

the front panel power switch. After a few seconds delay, the UPS will begin operating. Initially (for a

very short period of time) all front panel lights will flash on simultaneously, and the audible alarm will

beep once. Then the UPS will "power up" with the "UPS" red front panel light on. If the AC power

utility is present and within tolerance of the UPS, the "AC LINE" green front panel light will also be on.

After and additional couple of seconds, the "UPS" red light should go off, and the "AC LINE" green light

should remain on, indicating that the UPS is able to derive power from the AC power utility.

Fault Checking: If the normal UPS Power On sequence does not occur for you, perform one of the

following alternative actions:

1) If the "UPS" red light comes on and remains solidly on (also eventually to be accompanied by

an audible beeping alarm), recheck your connections to the AC utility. (Also check to see if any

breakers or fuses in that particular circuit of your building or in the back of your UPS are open.)

If after rechecking no problem is found, and the UPS will not perform according to the proper

procedure described above, contact the factory for further assistance.

2) If the normal UPS Power On procedure is not observed, and the warning conditions described

in alternative #1 are also not observed, contact the factory for further assistance.

Connecting the Load: Assuming that normal operation was observed, you can now plug your loads

into the receptacles at the back of the UPS. If during this procedure the "OVERLOAD" red light comes

on or starts blinking along with an audible alarm, your load is too large for the UPS, and some must be

removed or the UPS will shut down.

Installation Complete: Assuming an overload doesn't occur prior to attaching and turning on all loads,

you have completed the installation procedure of your UPS. From here on there is no special powering

up or powering down sequence that needs to be followed for either your load equipment or the UPS.

This installation procedure is only necessary to insure that the UPS did not incur any internal shipping

damage and that your building's AC utility is getting to the UPS.

Computer Terminal Connections: It is also suggested, but not required, that you connect a terminal

or computer to the RS232 interface (see section of the manual pertaining to this interface). Through

this communications interface you can obtain additional useful data that is either very difficult to

determine or is not available from the front panel lights. One of these parameters is the load on the

UPS. The microcontroller will indicate the ampere and volt-ampere load on the UPS. From this

information you will be able to determine if additional loads may be added in the future. It is advisable

that the steady state load observed on the UPS be limited to a maximum of around 80 to 85% of the

full rating of the UPS under normal operating conditions. This should provide enough margin under

most operating conditions.

Procedure for Changing Input or Output Voltage of UPS:

WARNING

Only qualified technicians or supervised personnel should attempt to change the input or output

voltage of a UPS and only after the following instructions have been read and fully understood.

Also, all instructions and warnings of the "Internal Maintenance" section of this manual should

be read and fully understood.

If your UPS is capable of 208/240 input voltage, the voltage that the UPS is set up for is printed on a

sticker at the input plug. If you wish to change to the other voltage, Mesta has provided a procedure

for qualified personnel to make such a change using only a medium, flat blade screwdriver. Likewise,

if your UPS is capable of 208/224/240 output voltage, the voltage that the UPS is set up for is printed

on a sticker next to the output receptacle on the back of the unit. If you wish to change to a different

output voltage, a qualified person may also make such a change. Changing this output voltage will not

affect the 120 volt output receptacles. To change either the input or output voltage of your UPS, turn

off the unit, unplug all loads to the unit, and open up the UPS be following the instructions in the

"Internal Maintenance" section of this manual. Once the unit is open, you can alter the wiring to the

main power transformer as follows. DO NOT change any other wiring than what is indicated below:

1. To change the input voltage of a UPS NOT equipped with the voltage regulation option (-R),

move the wire marked "IN+" as follows: Move "IN+" to terminal #5 of the transformer for 208

volts and to terminal #6 of the transformer for 240 volts. Use a flat blade screwdriver to

accomplish this task.

2. To change the input voltage of a UPS equipped with the voltage regulation option (-R), move

the wires marked "K1A" and "K1B" as follows: For 208 volts in, move "K1A" to terminal #5 and

"K1B" to terminal #4; for 240 volts in, move "K1A" to terminal #6 and "K1B" to terminal #5. Use

a flat blade screwdriver to accomplish this task.

3. To change the output voltage of a UPS, move the wires marked "OUT+" and "OUT-" as follows:

For 208 volts out, move "OUT+" to terminal #11 and "OUT-" to terminal #8;

For 224 volts out, move "OUT+" to terminal #11 and "OUT-" to terminal #7;

For 240 volts out, move "OUT+" to terminal #12 and "OUT-" to terminal #7.

For 208 volts out, move "OUT+" to terminal #11 and "OUT-" to terminal #8;

Use a flat blade screwdriver to accomplish this task.

Alternate Voltage Stickers: Shipped with your unit are alternate voltage stickers to be used if you

change the input or output voltage of you UPS. If you change the input voltage, take the new input

voltage sticker and place it over the one at the input plug of the UPS. If you change the output voltage,

take the new output voltage sticker and place it over the one at the output receptacle at the back of the

UPS.

Initialization Procedure: After changing the voltage wiring as previously described, close the UPS

according to the instructions in the "Internal Maintenance" section of this manual. Now you need to

perform an initialization procedure to the UPS. To perform this procedure, plug in the power cord of

the UPS into the AC utility power and switch on the "BATT/INT" AND "AC" breakers at the back of the

UPS. Then, while holding the front panel "ALARM RESET" button pressed in, turn on the UPS front

panel power switch (continuing to hold the "ALARM RESET" button pressed in for at least 5 seconds.

then release). After a few seconds, the audible alarm will start beeping and the front panel lights will

indicate the status of the initialization procedure.

If the "AC LINE" light is on solid and the "UPS" is flashing (other two lights don't matter) the

initialization was successful. At this time press the "ALARM RESET" button once and release. The

front panel lights will now indicate the AC input voltage that the UPS is set up for as follows:

UPS

BATT

OVLD

NOMINAL INPUT VOLTAGE

ON OR OFF

OFF

208V

ON OR OFF

OFF

240V

Verify that the AC input voltage setup is correct, then press the "ALARM RESET" button again and

release. The front panel lights will now indicate the output voltage that the UPS is set up for as follows:

AC UPS BATT OVLD NOMINAL OUPUT

VOLTAGE

FLASHING

OFF

208V

FLASHING

OFF

224V

FLASHING

OFF

240V

If after the initialization procedure, all lights are flashing in unison, the procedure was unsuccessful.

Turn off the front panel power switch and recheck the following items:

•UPS' AC plug is plugged into the utility

•"BATT/INT" and "AC" breakers at the back of the UPS are on

•All loads are disconnected from the UPS

Repeat the initialization procedure, making sure you hold the "ALARM RESET" button pressed in for at

least 5 seconds. If you encounter trouble again, contact the factory for additional assistance.

Procedure Check: If the initialization procedure is successful, turn off the UPS. After waiting for the

UPS to go off completely (all front panel lights will go off), turn on the AC breakers (and external

battery breaker if external battery cabinets are used) on the back of the UPS. Then turn on the UPS.

Now the UPS should function normally using the AC line. Checking your work concerning the output

voltage can be accomplished by two methods: connect a terminal to the RS232 port to verify that the

output voltage is what you want it to be, or use an RMS voltmeter capable of measuring 240 volts to

measure the voltage directly at the output receptacle of the UPS. After verifying the output voltage,

you may plug in your external loads to the UPS.

4. OPERATING PROCEDURE

SYSTEM TURN-ON (REFER TO APPENDIX C FOR OPTION A)

Once plugged in and turned on, the MESTA UPS will begin supplying power to the load. The green

"AC LINE" and "BATTERY" lights will be on. If the AC line fails, the red "UPS" light will come on, and

after 5 seconds an intermittent alarm will sound for 30 seconds. (This alarm may be silenced by

pressing the "ALARM RESET" button on the control panel.)

The following are the conditions that are indicated by the light and beeping sequences:

AC LINE ON (green) AC line within tolerance

BATTERY ON (green) Solid -- over 90% charge

Off -- discharged

Flashing 75% dutycycle -- 50-90% charge

Flashing 50% dutycycle -- 25-50% charge

Flashing 25% dutycycle -- 25-10% charge

Flashing 10% dutycycle -- 10-1% charge

At this point a solid tone can be heard for 30 seconds.

UPS ON (red) Solid, and after 5 second delay, 30 seconds of intermittent

beeping -- drawing power from battery.

Flashing with "OVERLOAD" on -- system shutdown due to

overload. UPS needs attention.

Flashing with "BATTERY" off -- system shutdown due to drained

batteries. UPS needs attention.

OVERLOAD (red) Solid and solid tone -- greater than 150% overload.

Flashing and beeping -- 100-150% overload.

ALARM RESET button tests lights and alarms as well as silences alarm, except in case of an overload.

It is also used to test the batteries.

To Test the Batteries: The UPS is programmed to test the internal batteries automatically and under

load. The procedure for starting this 60 second test is to hold the "ALARM RESET" button in for at

least 5 seconds. Release the button, then touch it again three more times in short succession. This

will signal the microcontroller to begin testing the batteries. The UPS will start beeping to signal that

the test is in progress. Test results will be indicated by the "BATTERY ON" light as indicated above.

To obtain more precise test results, use the software interface provided with the system.

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