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? Situate SFT 2841connected
Overview of the softwareA
Parameter settingB
C Main points to remember
SFT 2841 IN CONNECTED MODE
Prepare setting files
SFT2841 connected EN 2007_01.ppt2
Starting the application
Click on the icon
Select the working language
Choose the operating mode:
– connected– point to point via the front panel– via the network
Same access for SFT disconnected
SFT2841 connected EN 2007_01.ppt3
Connection via the network
If required: creation or modification of the network
Connection to Sepam units via the network
Choice of the network
Starting of SFT 2841 software on the chosen station
SFT2841 connected EN 2007_01.ppt4
SFT 2841 expert UMI
The protection and parameter setting data may be saved.
Reports may be edited.
? Situate SFT 2841connected
Overview of the softwareA
Parameter settingB
C Main points to remember
Parameter setting
PARAMETER SETTING
SFT2841 connected EN 2007_01.ppt6
Current operation
Metering and operating data– alarm messages
– tripping current
– number of operations
– logic status of inputs, outputs and LEDs
Parameter setting – of each protection
function
– of control logic
– of general installation and Sepam data
SFT2841 connected EN 2007_01.ppt7
Logipam
– Selection
– Choice in the list
– Apply
– Activate
– Delete
– Download onto the PC
– Automatic updating
SFT2841 connected EN 2007_01.ppt8
Logipam internal resources
LOGIPAM:– internal bits
– counters
– clocks
– delays
SFT2841 connected EN 2007_01.ppt9
General information on connected mode
– Connection
– Sepam type
– Sepam name
– Code operating mode
– Remote control
– Internal clock
SFT2841 connected EN 2007_01.ppt10
General diagnosis
– General characteristics– Software versions
– Sepam status– Clock with time-setting
– Presence of modules
– Monitoring of communication exchanges
Series 20
SFT2841 connected EN 2007_01.ppt11
General diagnosis Series 40
– General characteristics– Software versions
– Sepam status– Clock with time-setting
– Presence of modules– Monitoring of
communication exchanges
SFT2841 connected EN 2007_01.ppt12
General diagnosis
– General characteristics– Software versions
– Sepam status– Clock with time-setting
– Presence of modules
– Monitoring of communication exchanges
Series 80
SFT2841 connected EN 2007_01.ppt13
Diagnosis: LED, input and output status
– Display of LEDs
– Display of validated inputs
– Display of outputs
– Testing of 3s pulse outputs
Series 40 & 80
SFT2841 connected EN 2007_01.ppt14
Diagnosis: remote indication (TS) status
– Status transmitted via the communication link
Series 40 & 80
SFT2841 connected EN 2007_01.ppt15
Measurements
Network measurements: Current measurements
– rms– demand– maximum– residual– additional
Voltage measurements– phase-to-neutral– phase-to-phase– positive-sequence– negative-sequence
Frequency measurement
Series 80
SFT2841 connected EN 2007_01.ppt16
Measurements: vector diagram
Display– voltage
– current
Select– scale– référence
Series 80
SFT2841 connected EN 2007_01.ppt17
Power and energy measurements
Power measurements– active– reactive– apparent– power factor
Energy measurements– active– reactive
Series 80
SFT2841 connected EN 2007_01.ppt18
Temperature measurements
MET 148 modules
Series 80
SFT2841 connected EN 2007_01.ppt19
Network diagnosis
– Unbalance ratio
– Phase displacement
– Number of trips– Phase– Earth
– Total Harmonic Distortion
Series 80
SFT2841 connected EN 2007_01.ppt20
Network diagnosis
Machine diagnosis– Differential measurements
– Phase angles
– Impedance measurements
– Thermal overload
– Running hours counter
Series 80
SFT2841 connected EN 2007_01.ppt21
Network diagnosis
Tripping contexts– Selection by date
Series 80
SFT2841 connected EN 2007_01.ppt22
Switchgear diagnosis
– Cumulative breaking current
– …
Series 80
SFT2841 connected EN 2007_01.ppt23
Alarm management
Current alarms
– Not acknowledged
– Clear
– Reset
Alarm history– 200 alarms
Series 80
SFT2841 connected EN 2007_01.ppt24
Disturbance recording
– Selection by date
– Voluntary trigger
Series 80
– Recovery of recording
SFT2841 connected EN 2007_01.ppt25
On-line helpSeries 80
On-line help
? Situate SFT 2841connected
Overview of the softwareA
Parameter settingB
C Main points to remember Main points to remember
MAIN POINTS TO REMEMBER
SFT2841 connected EN 2007_01.ppt27
Network diagnosis functionsTripping current
This function gives the RMS values of the phase currents and residual currents at time of the last trip.
The measurement is defined as the maximum RMS value measured during a 30 ms interval after the activation of the O1 output.
RETURN
Acquisition of tripping current TRIPI1.
SFT2841 connected EN 2007_01.ppt28
Current phase displacement between the main phase currents (I) and additional phase currents (I') (1, 2, 3) is calculated for each phase.
The angle is measured in the clockwise direction.
The information is used to check Sepam wiring when 87T protection functions are implemented.
Machine operating assistance functions Current phase displacement
I
I’1
RETURN
SFT2841 connected EN 2007_01.ppt29
Metering functionsPower factor (Cos)
This function gives the phase displacement between the phase currents and the phase-to-neutral voltages.
The + and - signs and the IND (inductive) and CAP (capacitive) indications give the direction of power flow and the type of load.
V
I
Q
P
+IND
+CAP
-CAP
-IND
RETURN
SFT2841 connected EN 2007_01.ppt30
Network diagnosis functions Phase displacement
This function gives:
– phase displacement measured between the residual voltage and residual current in the trigonometric direction
– phase displacement between the V1, V2, V3 voltages and I1, I2, I3 currents respectively, in the trigonometric direction
The measurements are used during Sepam commissioning to check that the voltage and current inputs are wired correctly.
The angle is positive when the current is leading compared to the voltage (trigonometric direction).
the angle is modified by 180° by the setting incomer / feeder.
Io
Vo0
RETURN
I
V
SFT2841 connected EN 2007_01.ppt31
Differential / through current is calculated for the implementation of the differential protection functions 87T and 87M.
It is calculated for each phase by:
Machine operating assistance Differential / through current
IIdiffI
2
IItI
When a transformer is used (87T), the Idiff / It calculation takes into account the vector shift and transformation ratio..
The Idiff / It value is expressed with respect to In, the rated current of the main channels.
RETURN
It = max ( Iadjusted , I’adjusted ) Idiff = Iadjusted + I’adjusted
SFT2841 connected EN 2007_01.ppt32
Metering functionsPhysical values measured
Sepam measures the following physical values:– phase current (3I)– residual current (Io)– phase voltage (3V)– residual voltage (Vo)
Each measured signal is processed by Sepam to produce all the values necessary for the metering, diagnosis and protection functions.
RETURN
SFT2841 connected EN 2007_01.ppt33
Metering functionsRMS measurement
RMS measurement is only used by the phase current metering function and for the thermal overload protection function (49). The RMS values take into account harmonics up the the 13th.
For all other metering and diagnosis functions, the H1 fundamental 50 Hz or 60 Hz component is used.
RETURN
SFT2841 connected EN 2007_01.ppt34
Metering functionsResidual current
This function gives the RMS value of the residual current obtained by: – measurement: Io– calculation of the sum of the phase currents: Io
Accuracy at Ino: ±1%. Accuracy ± 2% from 0.3 to 1.5 Ino Accuracy ± 3% from 0.1 to 0.3 Ino
The measurement range extends to 40 Ino when Io measurement is used. In the other cases, the range extends to 20 Ino.
RETURN
SFT2841 connected EN 2007_01.ppt35
Resetting to zero:– by the clear key on the display unit if one of the two screens is
displayed,– by the clear command in the SFT2841 software,– via the communication link (remote control order TC4).
Metering functionsDemand phase current
RETURN
A
t
5mn
55A 63A 89A 78A 59A
100A
Demand current
5mn 5mn 5mn 5mn
SFT2841 connected EN 2007_01.ppt36
Metering functionsPeak demand current
At the end of each integration period, i.e. once the new demand current values are available, the function determines the greatest demand current value obtained since the last reset.
RETURN
A
t55A 63A 89A 89A 89A
100A
Peak demand current
5mn5mn5mn5mn5mn
SFT2841 connected EN 2007_01.ppt37
Metering functionsPhase-to-phase voltage
RETURN
This function gives the RMS value of the 50 or 60 Hz component of the phase-to-phase voltages.
U21 voltage between phases 2 and 1 (U21=V1-V2) U32 voltage between phases 3 and 2 (U32=V2-V3) U13 voltage between phases 1 and 3 (U13=V3-V1)
– by calculation when 3 phase-to-earth VTs are connected,– by measurement (U21 and U32) and by calculation (U13) when 2
phase-to-phase VTs are connected,– by measurement (U21) when only one phase-to-phase VT is
connected, in which case the U32 and U13 voltages are not available.
SFT2841 connected EN 2007_01.ppt38
Metering functionsFrequency
This measurement is based on:– U21 if only one phase-to-phase voltage is available,– positive sequence voltage if the U21 and U32 measurements are
available.
The frequency is not displayed (replaced by ****) if:– U21 or Vd is less than 40% of Un.– frequency is out of range.
Accuracy at Unp: ±0.01Hz 25 to 65 Hz range Sepam series40 and 80 45 to 55 Hz if 50Hz Sepam series 20 55 to 65 Hz if 60Hz Sepam series 20
RETURN
SFT2841 connected EN 2007_01.ppt39
Metering functionsPower factor (Cos)
Capacitive/inductive circuit: If V is leading compared to I, in the trigonometric (counter-clockwise)
direction, then is positive. A capacitive (CAP) circuit is one in which the current is leading
compared to the voltage ( <0). An inductive (IND) circuit is one in which the current is lagging
compared to the voltage ( >0).
V
I
V
I
RETURN
SFT2841 connected EN 2007_01.ppt40
Metering functionsActive, reactive and apparent power
For an incoming circuit:– Power supplied to the busbars
is positive.– Power supplied by the busbars
is negative.
For an outgoing circuit:– Power supplied to the busbars is negative.– Power supplied by the busbars is positive.
RETURN
Direction of power flow
Direction of power flow