Specifications are subject to change without notice SPT-90DS0303 3
SPT-90
Password Numeric code of max. 3 di-
gits; 2 protection levels of
the programming data
1st level Password “0”, no protection
2nd level Password from 1 to 499, all
data are protected
Measurement selection System’s active power (W),
system’s apparent power
(VA), system’s reactive
power (VAr), average active
power (Wavg), integration
time programmable from 1
to 30 minutes, system’s
power factor (cosϕ), maxi-
mum current (A max), avera-
ge phase-phase voltage,
phase-neutral voltage-
phase 1, phase-neutral vol-
tage-phase 2, phase-neutral
voltage-phase 3, frequency-
phase 1.
System’s (+) active energy,
system’s apparent energy,
Measurement selection (cont.) system’s reactive energy,
system’s (+/-) active energy
Transformer ratio For CT up to 5000 A,
For VT up to 100 kV (1MV)
Scaling factor
Operating mode Electrical scale: compression/
expansion of the input scale
to be connected to 1 or 2 ana-
logue outputs and to the alarm
output.
Electrical range Programmable within the
whole measuring range
Filter
Filter operating range 0 to 99.9% of the
input electrical scale
Filtering coefficient 1 to 255
Filter action Both analogue and serial
outputs (fundamental vari-
ables: V, A, W and their
derived ones)
Software Functions
Serial port (cont.)
Data (bidirectional)
Dynamic (reading only) System variables:
P, P AVG, S, Q, PF, VL-L, f,
energy and status of digital
inputs, setpoint output and
status of the energy over-
flow bit,
Single phase variables:
PL1, SL1, QL1, PFL1, VL1-N, AL1,
PL2, SL2, QL2, PFL2, VL2-N, AL2,
PL3, SL3, QL3, PFL3, VL3-N, AL3
Static (writing only) All programming data, reset
of energy, reset of energy
overflow bit, activation of
static output.
Stored energy (EEPROM)
≥250,000.000 kWh
Data format 1-start bit, 8-data bit, no
parity/even parity, 1 stop bit
Baud-rate 1200, 2400, 4800 and 9600
selectable bauds
Insulation By means of optocouplers,
4000 Vrms output to
measuring inputs
4000 Vrms output to
supply input
Temperature drift 200 ppm/ºC
RS 232 port (on request) bidirectional (static and
dynamic variables)
3 wires, max. distance 15m
Data format 1-start bit, 8-data bit,
no parity, 1 stop bit
Baud-rate 9600 bauds
Protocol MODBUS (JBUS)
Other data as for RS422/485
Pulse output (on request)
Number of outputs 1, independent
Type From 1 to 999 programmable
pulses for kWh, KVAh,
KVArh, MWh, MVAh,
MVArh,
open collector (NPN transistor)
VON 1.2 VDC/ max. 100mA
VOFF 30 VDC max.
according to DIN43864
Pulse duration 20 ms (ON), ≥20 ms (OFF)
Insulation By means of optocouplers,
4000 Vrms output to
measuring input,
4000 Vrms output to
supply input.
Alarms (on request)
Number of setpoints 1, independent
Alarm type Up alarm, down alarm
Setpoint adjustment 0 to 100% of the electrical
scale
Hysteresis 0 to 100% of the electrical
scale
On-time delay 0 to 255 s
Relay status Normally de-energized
Output type Relay, SPDT
AC 1 - 8A @ 250VAC
DC 12 - 5A @ 24VDC
AC 15 - 2.5 @ 250VAC
DC 13 - 2.5 @ 24VDC
Response time typ. 250 ms, filter excluded,
setpoint on-time delay: ”0”
Insulation 4000 Vrms output to
measuring input,
4000 Vrms output to
supply input
Output Specifications (cont.)