Satec Expertmeter EM720 Operation Manual page 68

Chapter 5 Configuring the EM720
Display Label
Wiring
PT Ratio
Nom. Voltage
CT Primary
CT4 Primary
Nom. Freq.
P.Dmd.Period
Num. Periods
Dmd.Sync.Src
Volt.Dmd.Per.
Amp.Dmd.Per.
Hrm.Dmd.Per.
Max.Dmd.Load
I4 M.Dmd.Load
Wiring Mode
68
Parameter
Wiring Mode
1
PT Ratio
PT Secondary (L-L)
Voltage
CT Primary Current 1-20,000 A
I4 CT Primary
Current
Nominal Frequency 50, 60 Hz
Power block
demand period
Number of Blocks
in Sliding Demand
Power Demand
Sync Source
Volt Demand
Period
Ampere Demand
Period
THD Demand
Period
I Max. Load
Current
I4 Max. Load
Current
1
PT Ratio is defined as a relation of the potential transformer's primary
voltage rating to its secondary rating. For example, for the 14,400 V
transformer's primary rating and 120 V secondary rating, the PT Ratio =
14400/120 = 120.
Available wiring modes are listed in the following table.
3OP2 3-wire Open Delta using 2 CTs (2 element)
4LN3 4-wire Wye using 3 PTs (3 element), line-to-neutral voltage readings
3DIR2 3-wire Direct Connection using 2 CTs (2 element)
4LL3 4-wire Wye using 3 PTs (3 element), line-to-line voltage readings
3OP3 3-wire Open Delta using 3 CTs (2½ element)
3LN3 4-wire Wye using 2 PTs (2½ element), line-to-neutral voltage readings
3LL3 4-wire Wye using 2 PTs (2½ element), line-to-line voltage readings
NOTE
Options Default
Basic Configuration
See Table 4LN3
below
1.0-6500.0 1.0
50-480 V 400 V
5 A
1-20,000 A 5 A
50 Hz
Demand Setup
1, 2, 3, 5, 10, 15 min
15, 20, 30, 60
min
1-15 1
Meter clock, Meter
clock
DI1-DI8
0-9000 sec 900 sec
0-9000 sec 900 sec
0-9000 sec 900 sec
TDD Setup
0 – 20,000 A 0
0 = CT primary
0 – 20,000 A 0
0 = CT primary
Description
EM720 Power Quality and Revenue Meter
General Meter Setup
Description
The wiring connection of the
device
The phase potential
transformer's primary to
secondary ratio
The nominal secondary line-to-
line voltage. Used as a
reference voltage for the
EN50160 evaluation.
The primary rating of the phase
current transformer
The primary rating of the I4
current transformer
The nominal line frequency
The length of the demand
period for power demand
calculations.
The number of blocks to be
averaged for sliding window
demands
The source input for
synchronization of the demand
intervals. If a digital input is
specified as the source, a pulse
front denotes the start of the
demand interval
The length of the demand
period for volt demand
calculations
The length of the demand
period for ampere demand
calculations
The length of the demand
period for THD demand
calculations
The maximum demand load
current for phase current inputs
The maximum demand load
current for I4 current input