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10. MAINTENANCE
The instrument is maintenance-free.
Clean the display and keyboard, if required, using a clean cloth and non-aggressive cleaning liquid.
Do not use solvents or detergents which may damage plastic parts.
11. TECHNICAL FEATURES
AUXILIARY POWER SUPPLY
Rated voltage powered from measuring inputs
(1)
external power supply 19÷60Vd c (on request)
Consumption 0.8VA max
VOLTAGE INPUTS
Rated voltage A) 3x230/400Va c +15% -20%, 4 wires
B) 3x120/208Va c +15% -20%, 4 wires
c) 3x400Va c +15% -20%, 3 wires
d) 3x2084230Va c +15% -20%, 3 wires
E) 3x1004120Va c +15% -20%, 3 wires
Input impedance ›1.3 MOhm
Burden max 0,15 VA per phase
Frequency 45 - 65 Hz
CURRENT INPUTS
Rated current (Ib) 1 / 5 Ar m s programmable
Min / Max measurable current 20 mA / 7 Ar m s
Maximum overload 10Ar m s continuous - 100 Ar m s for 1 second
Input impedance 0.02 Ohm approximately
Burden max 0.5 VA per phase
Insulation voltage 480 Va c max between phases
Rogowski coils input (optional) 200÷49995A (according to the requested value-refer to the instrument label)
TYPICAL ACCURACY
Voltage ± 0.3% reading ± 0.05% full scale
Current ± 0.5% reading ± 0.05% full scale
Active power ± 1% reading ± 0.1% full scale (PF=1)
Power factor 1.5% reading (0.5 inductive - 0.8 capacitive)
Active energy class 2 according to EN61036 and EN62053 standards
class 1 (ENH version)
Frequency ± 0.05% reading ± 2 digits from 45 to 65 Hz
DISPLAY AND OPERATING CONTROLS
Display high contrast LCD display 43 x 19 mm
8 digits for energies and other parameters + symbols
Keypad 2 push-buttons
COMMUNICATION PORT
(2)
(optional)
Type RS485 on request, optoisolated
Baud Rate 2400 to 57600 bps
78 kbps in case of LONBUS protocol (on request)
DIGITAL OUTPUTS
Type no. 2 optoisolated (50V-100mA
DC
)
(1)
The basic instrument is powered from L1, L2, L3 and N (4-wires version) or L1, L2, L3 (3-wires version). The presence of only one
of the three phases (4-wires version) or two phases (3-wires version) ensures the normal counting and displaying operations.
(2)
The serial port is powered from L1 and N (4-wires version) or L1 and L2 (3-wires version). The communication function is
ensured only if the L1 phase (or L1 and L2 for 3-wires) is present and within the specified power supply range.
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