GPRS based meter and logger is useful for motor protection system. It measure the electricity data of motor,which includes voltage supply, current ,load ,PF, frequency,KWh etc. It loggs these data on servers so you can view the live energy data and also previous energy data from any where on internet by log-in to www.emdata.in . It also has SMS alarm and email facility so you will be informed if any event is happen. For protection we have provided relay output which protects your motor from high voltage,phase failure, phase reversal,overload etc.

1. AN002
.
1 ©Embuilt Technologies,2014
http://www.embuilt.com
Version2
28th
April2014
AN002
MOTOR ENERGY
MONITORING AND
PROTECTION
ILLUSTRATED BY EXAMPLE

2. AN002
.
3 ©Embuilt Technologies,2014
http://www.embuilt.com
Version2
28th
April2014
GML-3 is useful in motor protection system. GML-3 provides all energy parameters and
also some useful parameters like run hour, load hour, voltage unbalance, current
unbalance in all three phases. It also protects motor from overload.
Generally most motors 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 number you want to notify .The direct email alert is also sent to track
events.
EXAMPLE : Now let’s we have to save our motor from over current. We assume t5Motor
maximum current is 20 A.
Change alarm parameter to current. (To know how 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”.
Now set the current value to 20 A.
The main feature we included for motor protection system is alarm duration. Motor takes
high current for some time at their startup. So we put an extra feature as “alarm duration”
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 motor will be protected.
You can set various alarms in GML-3 according to your requirement.
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.
ALARM PARAMETER
OLD:VOLTAGE (ANY)
NEW:CURRENT(ANY)
ALARM TYPE
OLD-LOW
NEW-LOW
ALARM VALUE
OLD : 1 A
NEW : 6A
ALARM DURATION
OLD: 60 SECOND
NEW:10 SECOND

3. AN002
.
4 ©Embuilt Technologies,2014
http://www.embuilt.com
Version2
28th
April2014
By above graph you can see your motor 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.