NTI E-ACLM-V/-P AC LINE MONITOR
3
E-ACLM-Pxx-V2
The E-ACLM-P12,-P18 and –P8 (ACLM-P) are triple sensors for the E-16D/5D/2D (ENVIROMUX) capable of monitoring
AC line input voltages between 50~250V AC, the Frequency (Hertz) between 47~63Hz, and the Power (Current) up to 12
amperes (for –P12), 8 amperes (for –P8) or 18 amperes (for –P18) from a single AC line. It will report the current RMS AC
Voltage, AC Frequency and RMS AC Power to the ENVIROMUX. The ACLM-P will also monitor the number of short term Swells
1
and Sags
2
as well as the number of Spikes
3
.
The ACLM-P12-V2 is rated for 12A of continuous load, 15A max.
The ACLM-P8-V2 is rated for 8A of continuous load, 10A max.
The ACLM-P18-V2 is rated for 18A of continuous load, 20A max.
The ACLM-P8/P12 uses a UL certified IEC 320 C14 inlet to connect to the AC line and a UL certified IEC 320 C13 socket
to connect the AC load. The ACLM-P18 uses a UL certified IEC 320 C20 inlet to connect to the AC line and a UL certified IEC
320 C19 socket to connect the AC load.
The E-ACLM-P8/P12/P18 is connected to the ENVIROMUX through up to 1,000 ft of CAT5/5e/6 cable (
Exception
: When
connected to the E-5D/2D the cable length is limited to 750 ft (24AWG min.) for E-ACLM-P18). Data is transmitted to and from the
ENVIROMUX utilizing the RS485 protocol. ACLM-P is installed between the power source and the load device, able to sense a
maximum surge current of 20A and will calculate and report the RMS AC Power. The device utilizes standard connection sockets
for easy user installation. The ACLM-P is also equipped with a power interrupt feature, which allows power to be disconnected
from the load device based on manual disconnect or configuration settings via the web interface.
The ACLM-P includes a resettable circuit breaker to protect the sensor from damage in the event the load device
exceeds the rating of the ACLM-Pxx circuits. In the event the circuit breaker should trip, remove the overload condition and reset
the circuit breaker.
Note: The circuit breaker will not allow a reset until it has reached reset condition, which may take between 1 and 3
minutes from the time the breaker tripped.
Features & Functions:
12 bit ADC resolution, 1% full scale ADC accuracy
Measure AC Voltage ACLM-Pxx-V2 (
±1%FS at 32°F to 104°F (0°C to 40°C))
Measure AC Frequency (@1% accuracy)
Monitors swells, sags, and spike events
Measures AC Current and Power (2.7% accuracy)
Optional Power Disconnect and Reconnect
Auto-Configured upon connection with E-XD
RJ45 Status LED’s for operating status
User selectable data interpolation options
Measuring the AC Voltage, AC Frequency, Power and Current Flow; Determining Swells, and Sags:
The ACLM-P provides constant monitoring of the AC line with an active sampling rate of 12,000 samples per second.
The measurement data is transmitted to the ENVIROMUX once every second. Each time data is sent, the ACLM-P will report the
present AC line voltage, frequency, current and calculated power, as well as the number of sags, swells, and spikes that have
occurred since the last data transmission.
After the ACLM-P has transmitted data to the ENVIROMUX, any stored values in the ACLM-P will be erased as new data
is acquired.
If a swell, sag, or spike event lasts longer than 1 second (5 seconds, for example) it will be counted as multiple events
by the ENVIROMUX because the ENVIROMUX will reset the data record to 0 each time the ACLM-P reports the data to the
ENVIROMUX. The count displayed on the screen will be updated based on the configured Refresh Rate.
Measuring Spikes:
The ACLM-P is also capable of recording the number of Spike events with a peak greater than 50V, 250V, 500V, or 1KV
as configured by the user. For example, if the spike threshold is set at 500V and the sensor records a spike exceeding 500V for
at least 5 microseconds, the ENVIROMUX will report a spike above 500V.
The User Interface:
From the Web Interface of the ENVIROMUX, the ACLM-P sensor can be customized and monitored. The user can define
the maximum and minimum threshold values for AC power and frequency, and configure the ENVIROMUX to send alerts based
on the power thresholds or disconnect power based on the voltage, current, frequency or power thresholds. The user may also
define the threshold for spike measurement.
