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| A Digital Power Monitor
with programmable trips for monitoring, control and overload
protection in 3-phase electric circuits. By measuring true power,
more accurate and sensitive load monitoring is achieved than
with current measurement devices. |
Overview
The E-220 Power Monitor measures the
true 3-phase power in an electric circuit. When connected to
the supply for an electric motor, it provides an accurate measure
of motor load. Losses in modern motors are small, so the E-220
can be used to give a reliable indication of the mechanical
power delivered to the drivetrain. Models are available with
programmable trips which can be used to control process changes,
alarms and motor shut down circuits. Alternatively, transducer
options offer analogue or digital outputs for use with PLC's
or computers. |
| Key Features |
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Fully digital design, easy to program via
interactive
front panel. |
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High frequency sampling for accurate real
time power measurement. |
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Self powered – no separate power supply
required. |
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Internal current transformer with single
wire feed through hole in casing – no coils to wind or
count. |
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Monitors all sizes of motor (external current
transformer for > 25A) and can be used with variable speed
drives. |
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Measures and displays Power, % Load, RMS
voltage, RMS current and Power Factor. |
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Programmable limits have delay timers to
avoid
nuisance trips. |
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Can be re-set remotely. |
Function
The E-220 uses high frequency sampling
techniques, measuring voltage and current in real time to determine
the true, instantaneous power.
This value is available as an output or is used in relation
to the programmed trip levels. To avoid trips on start-up, a
start delay timer can be set. Trip delays can also be programmed
to prevent nuisance tripping due to spikes. Resetting is either
via the front panel or from a remote signal. The figure below
illustrates a typical motor characteristic and the operation
of the E-220 (Type 2). |
| The specifications contained within this page
are correct at the time of going to print. British Autogard
are continually reviewing and updating the specifications on
all its product range and therefore reserve the right to change
any detail |
    
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