| May 2013 –
CARLO GAVAZZI is proud to launch the DMPU
Series Motor Protection System.
The DMPU is a modular electronic motor protection relay to control, monitor and protect
the performance of 3-phase constant or dual speed, AC induction motors. The DMPU device
measures electrical motor variables (voltage, current, harmonic distortion, power, energy
and earth leakage current), monitoring overloads through the thermal model, controlling
them and measuring other variables, such as motor and bearing temperature. Finally it
includes a data logger function for storing trends of the electrical variables, alarms and
fast data logging for storing start-up profiles. 
Through the communication
features, it is possible to transmit all monitored variables to a supervision control
system for data collection and process control. Profibus and Modbus TCP/IP protocols are
available to easily insert the DMPU
Series into a majority of
applications. The HMI operator interface is freely programmable and can show instantaneous
values and alarm messages. Windows based DMPU-PS configuration and monitoring software,
simplifies plant design through graphic block configuration and connection, where the
blocks are all the variables that can be used, as inputs, outputs, ANSI function,
electrical and temperature variables, logical functions, timers and counters.
The DMPU Series allows protection of the motor against damage due to thermal effect
taking place during overload condition. The protection trips when motor temperature
exceeds calculated TCU parameter as well as optional temperature measurements and
electrical variables. The DMPU implements several ANSI functions to protect motor from
operation that may damage it. For example ANSI 46 (motor inverse current), ANSI 51 LR and
ANSI 48 (locked or stalled rotor) and ANSI 46 (earth leakage) are among few that are
supported. All control functions such as start, stop, reverse, star-delta control and
alarm indication are possible with push buttons, touch screen HMIs or communications.
|
| Modular
concept including these modules: |
 |
DMPUT-MBT: Modbus TCP/IP
communication |
|
DMPU-PRB: Profibus
communication |
|
DMPU-05: Current and voltage
measurements |
|
DMPU-R2: 2 temperature or
digital input & 2 outputs |
|
DMPU-EL: Earth leakage module |
|
DMPU-HMI: Simple, two line HMI
operator panel |
|
BTM-T4/T7: 4.3” and
7” touch screen interfaces |
|
| Other features include: |
 |
Direct voltage measurement up
to 690VAC |
|
Direct current measurements up
to 5A, higher with CTs |
|
Up to 23 temperature or
digital inputs |
|
Up to 22 relay outputs |
|
Earth leakage through external
core balance transformer |
|
-25° to 55°C operating
temperature |
|
Cat III installation category
(IEC60661, EN60664) |
The DMPU Series is available from CARLO GAVAZZI’s North
American network of sales offices and distributors, or at www.GavazziOnline.com.
For more information on the new DMPU
Modular Motor Protection System, please click on either of the links below, or visit our
website at at www.GavazziOnline.com.
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