An 003- Application note fo rcompressor

AN003 .

1 ©Uma Electronics Enterprise, 2012

http://www.umaelectronics.com

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AN003

COMPRESSOR AND CRITICAL

MACHINE PROTECTION ILLUSTRATED BY EXAMPLE

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GML-3 is useful in compressor protection or critical machinery. GML-3 provides

all energy parameters and also some useful parameters like run hour, load hour,

voltage unbalance, current unbalance in all three phases.

Generally most compressor and machine fault is caused by over-voltage, over-

current and over load. Gml-3 provides relay facility for those events and also

SMS ALARM is sent to your number or any two numbers you want to

notify.The direct email alert is also sent to track events.

EXAMPLE

Now let’s we have to save our Compressor from over current. We assume Compressor

maximum current is 20 A.

• Change alarm parameter to current as image 1. (To change alarm parameter refer manual.)

• Now we have to set for which condition we want to set alarm. We want alarm if current is more

than 20 A. So set the alarm type at “HIGH” as image 2.

• Now set the current value to 20 A as shown in image 3.

• The main feature we included for compressor protection is

alarm duration. Compressor takes high current for some

time at their startup. So we put an extra feature as “alarm

duration”(image 4) in which you can set time in which

motor takes high current. If we assume that for 10 second at

startup motor takes high current then set the alarm duration at 10 second.

So if the current raising beyond set value you will got an SMS and also email. You can also set

relay for that which can off the motor if alarm occur. So your Compressor will be protected.

You can set various alarms in GML-3 according to your requirement.

ALARM PARAMETER

OLD:VOLTAGE(ANY)

NEW:CURRENT(ANY)

IMAGE 1

ALARM TYPE

OLD-LOW

NEW-HIGH

IMAGE 2

ALARM VALUE

OLD -5.000A

NEW-20.000A

IMAGE 3

ALARM DURATION

OLD-60 SECOND

NEW-10 SECOND

IMAGE 4

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You can view log of all energy parameter on www.emdata.in . From where you can view your

motor energy status online from anywhere anytime. If you

are using the generator and other energy source then you

can find by graph which source cause your motor damage.

By above graph you can see your compressor running

status, how much current it takes, when it gone on and off.

You can view all parameters by graph and analysis by

yourself.

FEATURES FOR COMPRESSOR AND CRITICAL MACHINE PROTECTION:

1. Over current protection

2. Over voltage protection

3. Phase reversal protection system

4. Any Phase missing protection system

5. Low P.F. protection

6.Mobile SMS on Alarm and event.

7. Direct email on alarm and event.

8. Set various alarm on same time.

9. Continuous data logging on server www.emdata.in .

10. Low cost and highly reliable.

IMAGE 5

An 003- Application note fo rcompressor

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