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03112
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TM
E51
INSTALLATION GUIDE
E51C2 FDS
E51C3 L
og
Regist
er
R/W NV Format Units Scale
Range
Description
Configuration
•
• 129
R/W
UInt
N/A
Reset:
- Write 30078 (0x757E) to clear all Energy Accumulators to 0 (All).
- Write 21211 (0x52DB) to begin new Demand Sub-Interval calculation cycle. Takes effect at the end of the
next 1 second calculation cycle. Write no more frequently than every 10 seconds.
- Write 21212 (0x52DC) to reset Max Demand values to Present Demand Values. Takes effect at the end of
the next 1 second calculation cycle. Write no more frequently than every 10 seconds.
- Write 16640 (0x4100) to reset Logging (E51C3 only).
- Write 16498 (0x4072) to clear Pulse Counts to zero.
- Read always returns 0.
•
• 130
R/W NV UInt
10,
11,
12,
31,
40
Single Phase: A + N
System Type
(See Manual. Note: only the
indicated phases are monitored
for Phase Loss)
Single Phase: A + B
Single Split Phase: A + B + N
3 phase ∆, A + B + C, no N
3 phase Y, A + B + C + N
•
• 131
R/W NV UInt
Amps
1-32000
CT Ratio – Primary
Current Inputs
•
• 132
R/W NV UInt
1, 3
CT Ratio – Secondary Interface (1 or 1/3 V, may not be user
configurable)
•
• 133
R/W NV UInt
100
0.01-320.00
PT Ratio: The meter scales this value by 100 (i.e. entering 200 yields a potential transformer ratio of 2:1).
The default is 100 (1.00:1), which is with no PT attached. Set this value before setting the system voltage
(below)
•
• 134
R/W NV UInt
82-32000
System Voltage: This voltage is line to line, unless in system type 10 (register 130), which is line to neutral.
The meter uses this value to calculate the full scale power for the pulse configuration (below), and as full
scale for phase loss (register 142). The meter will refuse voltages that are outside the range of 82-660 volts
when divided by the PT Ratio (above).
•
• 135
R
NV UInt
kW
W
1-32767
Theoretical Maximum System Power – This read only register is the theoretical maximum power the meter
expects to see on a service. It is calculated by the meter from the System Type (register 130), CT size
(register 131), and System Voltage (register 134) and is updated whenever the user changes any of these
parameters. It is used to determine the maximum power the pulse outputs can keep up with. This integer
register has the same scale as other integer power registers (see register 140 for power scaling).
•
• 136
R
UInt
Reserved, always returns 0
•
• 137
R/W NV UInt
0,1
Display Units: 0 = IEC (U, V, P, Q, S), 1 = IEEE (default: VLL, VLN, W, VAR, VA)
•
• 138
R
SInt
-4 0.0001
-3 0.001
-2 0.01
-1 0.1
0 1.0
1 10.0
2 100.0
3 1000.0
4 10000.0
Scale Factor I (Current)
Scale Factors
Note: These registers contain a
signed integer, which scales the
corresponding integer registers.
Floating point registers are not scaled.
Scaling is recalculated when the meter
configuration is changed.
•
• 139
R
SInt
Scale Factor V (Voltage)
•
• 140
R
SInt
Scale Factor W (Power)
•
• 141
R
SInt
Scale Factor E (Energy)
•
• 142
R/W NV UInt
%
1-99
Phase Loss Voltage Threshold in percent of system voltage
(register 134). Default value is 10 (%). Any phase (as configured
in register 130) whose level drops below this threshold triggers
a Phase Loss alert, i.e., if the System voltage is set to 480 V
L-L, the L-N voltage for each phase should be 277 V. When the
threshold is set to 10%, if any phase drops more than 10% below
277 V, (less than 249 V), or if any L-L voltage drops more than
10% below 480 V (less than 432 V) the corresponding phase loss
alarm bit in register 146 will be true.
Phase Loss Output
Note: The phases tested are determined
by the System Type.
•
• 143
R/W NV UInt
%
1-99
Phase Loss Imbalance Threshold in Percent. Default is 25% phase
to phase difference. For a 3-phase Y (3 + N) system type (40 in
register 130), both Line to Neutral and Line to Line voltages are
tested. In a 3-phase Δ System type (31 in register 130), only Line
to Line voltages are examined. In a single split-phase (2 + N)
system type (12 in register 130), just the line to neutral voltage
are compared.
