ITRON ACE6000, Руководство пользователя

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ACE6000 User Guide
26
High frequency resistance
A low-pass filter with a cutting frequency at 2kHz is introduced on the I and V measurement channels.
These filters make the metrology resistant against High Frequency (HF) currents superimposed on 50Hz nominal
currents and added harmonic currents and also resistant against HF voltage superimposed on 50Hz nominal
voltages and added harmonic voltages.
This HF resistance is relative to the frequency domain from 2kHz to 150kHz, the immunity levels are far in
excess of the values generated by LV loads.
7.1.1. Measurement error correction
The meter can be configured to take into account any measurement errors introduced by the current (CT) and
voltage transformers (VT). This facility increases the global accuracy by applying a correction to the applicable
measured and/or calculated values within the meter.
Two types of correction can be applied:
voltage and current amplitude correction to compensate for any transformer ratio errors
voltage and current phase angle correction to compensate for any transformer angle errors
CT/VT correction can only be configured using the meter support tool and must be carried out with regard to the
accuracy of the connected transformer.
7.2. External connections
The meter may be configured with output facilities, as detailed in this section.
Control output
The meter can be factory-configured with a number of individual control outputs that function as high-level
switches for connection to further meters or other external equipment.
The control outputs can be individually programmed and used to transmit or indicate meter events such as:
the end of an integration (EOI) or billing (EOB) period
an alarm
tariff indication
a clock synchronisation pulse
a pulse output
an excess demand or phase cut
excess current
Control output terminals
The control output terminal block provides a common connection point and accepts cables up to 1.5mm².
Maximum switching voltage = 288V AC, 320V DC
Maximum current = 100mA
Terminal Function Typical wiring
1 Control output 1
2 Control output 2
3 Control output 3
4 Control output 4
C Common