AUMSHIVAY ENGINEERING PRIVATE LIMITED
B-21, Bhan Nagar, Queens Road, Jaipur-302021
Website: www.aumshivay.com, www.omengineering.in
E-mail:[email protected]
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REG. OFFICE:VILLA NO. 60,LATA NAGAR, KALWAR ROAD, JHOTWARA, JAIPUR - 302012
TM
TM
No-Load Running
Under current level: I< = (0.15-1)Im, step 0.01Im
Trip time delay: tI< = (0.1-90)s, step 0.1s
When current is below 0.1 Im the function is disabled
Earth Fault
Current setting range: O> = (0.02 - 2)On, step 0,01On
Istantaneous output : £ 0.03s (Reset time of instantaneous output : tO> + tBO)
Independent time delay : tO> = (0.05 - 5)s, step 0.01s
Over-current
Current setting range: I> = (1 - 5)Ist, step 0.1Ist (limited to 20 In)
Istantaneous output: £ 0.03s (Reset time of instantaneous output : tI> + tBO)
Independent time delay: tI> = (0.05 - 1)s, step 0.01s
Reset time delay of the blocking output relay : tBO = (0.05 - 0,5)s, step 0,01s
Limitation of N° of Starting
Numbers of startings: StNo = (1 - 60), step 1
Time interval for counting of StNo : tStNo = (1 - 60)min, step 1min If during the set
interval the StNo is attained, a new start is inhibited for the time tBst.
Reset time after trip : tBst = (1 - 60)min, step 1min.
Starting Sequence Control
During start-up of the motor, the unit can control an output contact used to operate the
switch-over of Reduced Voltage
motor starter (star-delta, resistance or impedance, autotransformers, etc.) to
automatically manage the starting transition:
Switch-over (transition) current: : Itr = (0.1-1)Ist, step 0.1Ist.
Maximum switch-over time delay: tTr = (0.5-50)s, step 0.1s.
At motor's start, counting of tTr begins. If during tTr the motor current drops below ITr,
switching-over is operated; if motor
current stays over ITr longer than tTr, the Locked Rotor element is activated.
Auto-setting
The complexity of properly set a motor protection, frequently produces undesired
tripping or non-operation of some of the data functions.
The relay MM30 automatically selects the best setting of the according to motor and
system basic data.
These parameters are: System frequency, Rated primary current of phase CTs, Rated
primary current of earth fault CT,
Motor rated current, Motor starting current, Starting time, Transition current level,
Transition time. Once these settings have been programmed the AUTOSET function can
be activated and all the variables are computed and automatically set at values suitable
for a normal duty of the motor. Variables can be anyhow manually modified if different
setting is needed.
Features:
Auto setting of parameters.
Draw out enclosure.
8 digit alpha numeric display.
Real Time Measurements.
Measurement and display of actual & trip data recordings.
8 LED’s for fault indication.
Control on number of starts of motor and Starting sequence control.
During start-up of the motor, the unit can control an output contact to automatically manage the starting transition.
RS485 port for communication with Modbus Protocol.
