Crompton Controls M10 - Manual (Page 7)

Emotron AB 01-2550-01r3 Description 5
3 Description
This instruction manual describes the installation and commissioning of the
Emotron M10 shaft power monitor. The Emotron M10 is a single function
monitor intended for machine builders and OEMs. It is the ideal choice for
price sensitive applications requiring only basic under- or overload protection.
For more advanced load monitoring we recommend the Emotron M20 shaft
power monitor.
The Emotron M10 is well suited for supervising induction motor driven equip-
ment, such as centrifugal pumps, magnetic pumps, mixers, scrapers, crushers
and conveyors in applications with drive motors of up to 50 A. It can also be
used as an electronic shear pin (Motors max. 50A).
The Emotron M10 provides reliable monitoring and protection, optimizing
production equipment and minimizing expensive breakdowns and interrup-
tions. It immediately detects any abnormal condition and initiates a warning. If
the normal machine load level is exceeded, the internal relay changes state and
the alarm LED turns red (LED is green at normal load). The output relay con-
tact can be used for alarm indication and/or for machine shut-down.
Shaft power is calculated by measuring motor input power and subtracting the
motor power loss calculated using a unique principle. Calculating shaft power
gives more reliable supervision than non-linear techniques, such as current and
phase angle measurements. Current measurement is only sufficient at high
motor loads and phase angle only at low loads. Input power, sometimes called
true or real power, is linear but ignores motor power loss.
Using the motor as its own sensor means no external sensors or extra cabling are
required. By taking into account the motor power losses, the monitor is able to
accurately measure the shaft power supplied by the motor to the application.
This advanced technique allows the Emotron M10 to monitor the "application
load" rather than the total motor load, which includes the varying motor losses.
The monitor is easy to install and is mounted on a standard DIN rail. It is easy
to select and set up the function you wish to use, for example under- or overload
protection, relay function, response delay or alarm margin. The "Auto Set"
function can be used to set the desired load level automatically.
For further information, visit www.emotron.com.