Newtons4th SFRA45 Operator's manual

SFRA45 QUICK MEASUREMENT GUIDE
4. Power on SFRA45, note battery charge level
1. Connect SFRA45+Interconnecting Cables+Cable Reel
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
2. Connect GEN+CH1 BNC Cable Reel Connectors to
First Clamp (Using F-Connector) and CH2 to Second
Clamp
3. Connect 2x Earth Braids to Clamp Earth Points
5. EXAMPLE A-B PHASE CONNECTIONS
Connect Clamp (A.1) to phase A Transformer Bushing, use braid clamps (B.1) to fasten Earth Braid (C.1) to the local
earthing point. A.2, B.2 and C.2 are connected to phase B respectively
(A.1)
(B.1)
(C.1)
(A.2)
(B.2)
(C.2)
A PHASE B PHASE
(A.1)
This clamp is referred to as Clamp A.1 in step 5 below

6. Enter “SWEEP” menu, check sweep settings
Start Frequency
Stop Frequency
No. of Steps
7. Set Output Voltage Level and Generator to
“on”
After changes are made, continue to press “HOME” until
presented with the Main Display Screen
Set Output Voltage
Set Output to “ON”
9. Ensure Both Clamps and Earth braids are
connected to transformer (See Step 5) and
press “START” on keypad
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
Wait for Sweep to complete, instrument will display “SWEEP” in
top left of the display whilst the sweep is running.
8. Set Instrument Measurement Speed in
“ACQU MENU” to “Very Fast” initially, if results
are noisy - reduce speed
9. During the sweep, use the “REAL TIME”,
“TABLE” and GRAPH” views as desired
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
The results can can be viewed in “Real Time” during a sweep, which
is highly advantageous to detect poor wiring connections to the
transformer.
10. Zoom In and Zoom Out of a graphical plot
using the Zoom +/- buttons to analyse the
results in more detail
The Zoom function is also useful in the “Real Time
Display” to enlarge certain sweep parameters during a
sweep
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
11. To Save the sweep data, along with all
transformer/sweep details, enter the “DUT”
menu and ll out as necessary
Once the transformer and sweep conguration details
are set, press “ENTER” until presented with the standard
measurement screen
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0
DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
12. Enter “PROG” Menu to save the sweep
to memory, select the location and enter the
name of the sweep
Select Internal/USB memory stick as required, take care
not to overwrite other sweeps that are still required.
Move cursor to the “execute” menu option and select
“ENTER” to store sweep
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0
DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45

1. Load Plot from memory : Existing plots can
be stored in the instruments internal memory
or on a memory stick. Recalling these plots is
peformed in the RECALL - SWEEP menu
Selecting “ENTER” whilst highlighting the sweep to be recalled will
load the sweep data along with all “DUT” and sweep settings
SETTING REFERENCE PLOTS
A major benet of the SFRA45’s standalone proprietary operating system is that the user can compare plots
previously recorded. This can be performed in the eld, real time without the requirement for a PC connection. It is
advisable to use an existing plot as a “Reference Plot” whenever possible for a comparative measurement, this
enables the engineer to detect a connection problem or genuine fault in the transformer at an early stage in the test.
2. Setting the recalled plot as the “Reference
Plot” for comparitive measurements is
performed by rst selecting “GRAPH” to view
the graphical representation of the plot and
then the “ZERO” button
Guidance for setting the “Reference Plot” is given on the graphical display
screen in light blue writing - “PRESS ZERO TO SET PLOT AS REFERENCE“
3. Once the “ZERO” button is pressed, the
recalled plot changes to Light Blue in colour,
this is now the reference plot
“Sweep Reference Set” will be displayed on screen once the Zero
button is pressed
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
4. The previous sweep settings will already be
loaded as a result of the “RECALL-SWEEP”
function, therefore a new sweep can immediately
commence with the “START” button
Once the new sweep has commenced, new sweep data will be
displayed as a yellow line and the reference plot remains light blue
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
5. As the plot builds, it is possible to “ZOOM”
in to the real time data and analyse the plot in
more detail
Zooming in will allow the engineer to quickly diagnose any
connection/transformer issue
ZOOM-ZOOM+ REAL TIME TABLE GRAPH
ACQU SWEEP TRIM
COMMS DUT AUX
OUT CH1 CH2
SYS MODE PROG
GHI 4
1 ABC 2 DEF 3
JKL 5 MNO 6
PQRS 7 TUV 8 WXYZ 9
0DELETE ENTER
BACK NEXT
HOME
ESC
START
STOP
ZERO
TRIG
FRA LCR RMS SCOPE SWEEP PROG
M
k
m
u
RECALL
+/- .
OUTPUT
± 10V pk
50Ω
CH1 INPUT
± 10V pk
Selectable
CH2 INPUT
± 10V pk
Selectable
GEN
CH1 CH2
SFRA CABLE SYSTEM
N4L
Sweep Frequency Response Analyzer
SFRA45
6. Once the sweep is complete, it is easy to
compare the reference sweep and current sweep
on the display without the need for a PC
Once you are happy with the results, remember to save the data to
the instrument internal memory or directly to the USB memory stick

TYPICAL TRANSFORMER TEST SEQUENCES AS PER IEC60076-18
Test No
CH1 (Clamp A.1,
SIGNAL AND
REFERENCE)
CH2 (Clamp A.2,
RESPONSE) Tap Position
1 Neutral Line Terminal Phase
1Max Turns
2 Neutral Line Terminal Phase
2Max Turns
3 Neutral Line Terminal Phase
3Max Turns
4 Neutral Line Terminal Phase
1
Tap Winding Out of
Circuit
5 Neutral Line Terminal Phase
2
Tap Winding Out of
Circuit
6 Neutral Line Terminal Phase
3
Tap Winding Out of
Circuit
Star Connected Winding with Tap Changer
Test No
CH1 (Clamp A.1,
SIGNAL AND
REFERENCE)
CH2 (Clamp A.2,
RESPONSE)
1 A,U,R or 1 B,V,S or 2
2 B,V,S or 2 C,W,T or 3
3 C,W,T or 3 A,U,R or 1
Delta Connected Winding without Tap Changer
Test No
CH1 (Clamp A.1,
SIGNAL AND
REFERENCE)
CH2 (Clamp A.2,
RESPONSE)
1 Neutral Line Terminal Phase
1
2 Neutral Line Terminal Phase
2
3 Neutral Line Terminal Phase
3
Star Connected Winding without Tap Changer
Test No
CH1 (Clamp A.1,
SIGNAL AND
REFERENCE)
CH2 (Clamp A.2,
RESPONSE) Tap Position
1 A,U,R or 1 B,V,S or 2 Max Turns
2 B,V,S or 2 C,W,T or 3 Max Turns
3 C,W,T or 3 A,U,R or 1 Max Turns
4 A,U,R or 1 B,V,S or 2 Tap Winding Out of
Circuit
5 B,V,S or 2 C,W,T or 3 Tap Winding Out of
Circuit
6 C,W,T or 3 A,U,R or 1 Tap Winding Out of
Circuit
Delta Connected Winding with Tap Changer