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E-220 Options
All E-220 power monitors measure and
display real-time Power, % Load, RMS voltage, RMS current and
Power Factor. Types 1 to 4 have relays which can be programmed
to trip at selected power levels. Transducer versions (Types
5 and 6) are also available which provide the power as a digital
or analogue output for use with external control and monitoring
equipment. Other types are available with alternative relay
configirations to meet your specific requirements. Please consult
Autogard. |
Type 1 - Single relay, one overload
trip
One overload level can be programmed to
trip the single relay at the desired power level. The relay
is held closed in normal operation and latches open on trip.
(ie. N.O. contact which fails safe on loss of power).
Type 2 – 2 relays, one overload
trip, one underload trip
This is the most commonly used, general
purpose option. In addition to an overload trip, there is an
underload limit which can be used to give warning of loss of
load due to a process failure or other system abnormality. Each
trip has its own fail safe relay which is normally held closed
and latches open on trip.
Type 3 – 2 relays, one overload
warning, one overload trip
This is another commonly used configuration,
where it is desirable, for example, to have a warning indication
prior to an overload trip. In this case relay 1 is normally
open (NO) and non-latching for use with an alarm. Relay 2 is
held closed and latches open on trips for fail safe motor shut
down.
Type 4 – 2 relays, 2 independent
overload trips
This option is primarily intended for
dual mode operation
(e.g. 2-speed motors) where separate trip levels are required
for
2 different running conditions. Only one trip is active at a
time and each has its own latching relay. The relays are normally
held closed and latch open on trip. The active trip is selected
using a 12-24V DC signal to IN2.
Type 5 – Analogue outputs, 0-10V
and 4-20mA
Terminals on the front panel provide analogue
outputs which are proportional to the power level in real time.
Both 0-10V and 4-20mA connections are provided. The outputs
can be used for monitoring, analysis or control purposes. This
version does not include any trips or relays.
Type 6 – Digital output, RS485
in ASCII
This version is similar to the Type 5
but is used when a digital signal is preferred. The unit outputs
an ASCII character string, denoting the power values in real
time. Refer to the installation data sheet for details of format.
As with Type 5, this version does not include any trips or relays.
Voltage Ranges
The E-220 is suitable for use with motor
voltages between 380 and 460V AC 3-phase. For 575V AC please
specify model E-221. Type and frequency options are the same
as for E-220. For other voltages, please consult Autogard.
Current Ranges
The E-220 measures current using an internal
Current Transformer (CT). This is suitable for 380/460V motors
up to 18.5kW (25HP). For larger motors, an external current
transformer is also required – please request "External
CT 300A/5A" when ordering. For other motor voltages, or
power ratings over 220kW (300HP), please consult Autogard. |
| Ordering
Example |
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Autogard Power Monitor E-220/50-3
Autogard Model E-220, 380/460V, factory set for 50Hz
AC 3-phase mains operation, Type 3.
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| 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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