© Emotron AB

Protection against damage

and downtime

Emotron M20Shaft Power Monitor

© Emotron AB

• Unique shaft power calculation

• Uses motor as a sensor

• Increased reliability

• Reduced maintenance costs

• Low-cost installation

Emotron M20 – efficient protection

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Preventive action saves money

• Efficient and reliable operation

• Reduced maintenance costs

• Short pay-back time

• Early warning or stop

• Pump is running dry

• Scraper blade is damaged

• Crusher is jammed

Load

Time

Overload stop

Overload warning

Normal load curve

Underload warning

Underload stop

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Unique shaft power monitoring

• Unique monitoring technique

• Shaft power = Input power – Power loss

• Accurate value over the whole load range

• More reliable supervision

Shaft power

Current

Phase angle

Input power

kW/A/φ°

Motor load

100%

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Uses motor as a sensor

• Uses drive motor as a sensor

• No sensors or extra cabling

• No holes in pipes

• Increased reliability

• Reduced installation costs

• Reduced maintenance

© Emotron AB

Direct correlation to pump curve

• Prevents dry-running and cavitation

• Direct correlation to pump curve

• Set max. and min. load levels for pump and motor

• Immediately detects over- or underload

Head (mvp)

Warning dry-running

Warning cavitation

Operational areaPump

Motor shaft power

Operational areaLoad

Flow

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Higher accuracy with scalable signal

• Unique scalable analogue output signal

• Machine load scaled to actual working range

• Reliable monitoring also when small load variations

• Input to indicating instruments, controllers, PLC

Machine load

100%

Output signal mA

70%

Actual working range

30%

0

6 14 20

Emotron M20 scaled output signal Unscaled output signal

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Low-cost installation

• Reduced installation costs

• Uses motor as a sensor

• No external sensors

• No holes in pipes

• Monitors via current transformer

• No external transmitters

• Minimized wiring

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Enter your settings in three seconds

• Unique Auto set feature

• Set four protection points in three seconds

• Press Auto set during normal operation

• Warning and stop levels calculated automatically

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Zero maintenance

• Higher reliability and reduced maintenance

• Replaces costly and service-demanding components

• Solid-state device with no moving parts

• Installed away from hostile operating area

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Protection to meet your needs

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Pumps

• Warns or stops the pump

• Risk of dry-running or cavitation

• Motor does not drive the pump

• Low flow, closed valve, blocked pipe etc.

• Reduced maintenance costs

• Increased reliability

• Less downtime

© Emotron AB

Mixers

• Warns or stops the mixer

• Damaged mixer blade

• Shaft oscillation

• Viscosity is right

• Reduced maintenance costs

• Increased reliability

• Less downtime

© Emotron AB

Scrapers

• Warns or stops the scrapers

• Jamming

• Damaged scraper blade

• Reduced maintenance costs

• Increased reliability

• Less downtime

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Crushers, conveyor systems etc.

• Warns or stops the process

• Jamming occurs

• Material runs out

• Reduced maintenance costs

• Increased reliability

• Less downtime

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Technical data Emotron M20

Supply voltage 100-240 / 380-500 / 525-690 VAC

Frequency 50 / 60 Hz

Rated current Up to 999 A via current transformer

Protection class IP20

Approvals CU, UL, cUL

© Emotron AB

A dedicated product portfolio

Emotron Shaft Power Monitors

Emotron Softstarters

Emotron Variable Speed Drives

• PROTECT

• START• PROTECT• STOP

• START• PROTECT• CONTROL• STOP