ORION ITALIA VFR-1001 User manual

O R I O N I T A L I A
INSTRUCTION MANUAL
VFR
Voltage Frequency Relay
Firmware version 1.29
Via G. Orsi 35, 29122 Piacenza [PC] Italia
Phone: [phone] | www.orionitalia.com

SAFETY STANDARDS AND GENERAL WARNINGS
For a proper installation of the unit the technicians must read carefully and understand the instructions
provided by the Constructor.
All the installation operations must be carried out by suitably qualified technicians with adequate knowledge
of the unit and of the content of this manual.
1. Check that the installation room (spaces, segregations and ambient) are suitable for the electrical and electronic
apparatus and in particular that:
•the room conditions are in compliance with the information contained in SPECIFICATION;
•the rating of the unit (voltages, frequencies, and so on) are coherent with the features of the electric system.
2. Make sure that the Standard and Legal requirements are followed during installation, service and maintenance,
in order to construct installations according to good technical and safety working practices.
The unit must be used EXCLUSIVELY for the purposes described in the Chapter GENERAL
INFORMATION.
High-voltage live parts; disconnect the unit before carrying out any insulation tests on the
installation.
Do not carry out any installation/maintenance operations requiring the disassembling and the
removal of the unit from the panel on which it is mounted when the unit is live: make sure it
has been disconnected.
SYMBOLS IN THE TEXT AND THEIR MEANINGS
It indicates an OBLIGATION, an operation that must be obligatory. Pay attention to the
information signalled by this symbol, as it refers to situations which require CAUTION AND
WARNING: any operations not in compliance with what is indicated could provoke damages to
objects or people.
Pay particular ATTENTION to the parts indicated by this symbol: they are live.
It indicates a DANGER, a situation or operation requiring the MAXIMUM ATTENTION: any
actions not in compliance with what is indicated could provoke really serious damages to
objects and even mortal injuries to people.
It indicates INFORMATION or REMARKS that must be read with particular attention.
For any requests, please contact:
ORION ITALIA ASSISTANCE SERVICE
WEB: www.orionitalia.com

VFR Voltage Frequency Relay Instruction Manual: VFR GBM 06/10/2021
INDEX
1. General Information.....................................................................................................................................................1.1
1.1 DESCRIPTION ..............................................................................................................................................1.1
1.2 APPLICATIONS.............................................................................................................................................1.1
1.3 DIGITAL MEASUREMENT*...........................................................................................................................1.1
1.4 FEATURES....................................................................................................................................................1.1
1.5 APPLICABILITY.............................................................................................................................................1.1
1.6 COMMUNICATION........................................................................................................................................1.1
1.7 SIGNALLING AND PROGRAMMING.............................................................................................................1.1
1.8 PROTECTION AND FUNCTIONALITY*.........................................................................................................1.1
1.9 SPECIFICATIONS.........................................................................................................................................1.2
1.10 ORDER CODE...............................................................................................................................................1.3
2. Installation....................................................................................................................................................................2.1
2.1 DESCRIPTION ..............................................................................................................................................2.1
2.2 UNPACKING..................................................................................................................................................2.1
2.3 MOUNTING...................................................................................................................................................2.1
2.4 WIRING.........................................................................................................................................................2.2
2.5 COMMUNICATIONS......................................................................................................................................2.4
2.6 POWER SUPPLY..........................................................................................................................................2.4
3. Main Menu, Autoscroll and Pop-Up Functions ..........................................................................................................3.1
3.1 MENU STRUCTURE .....................................................................................................................................3.1
3.2 AUTOSCROLL FUNCTION ...........................................................................................................................3.2
3.3 POP-UP FUNCTION......................................................................................................................................3.2
3.4 MENU SURFING...........................................................................................................................................3.2
3.5 PASSWORD MANAGEMENT........................................................................................................................3.2
3.6 EDITING AND STORING KEYS ....................................................................................................................3.3
3.7 FUNCTION KEY............................................................................................................................................3.3
3.8 SYMBOLS USED IN THE TEXT....................................................................................................................3.4
4. Menu RELAY STATUS.................................................................................................................................................4.1
4.1 RELAY STATUS............................................................................................................................................4.1
5. Menu ACTUAL VALUES ..............................................................................................................................................5.1
5.1 Actual values: LINE VOLTAGES....................................................................................................................5.1
5.2 Actual values: PHASE VOLTAGES................................................................................................................5.1
5.3 Actual values: PHASE SEQUENCE...............................................................................................................5.1
5.4 Actual values: VOLTAGE AVG,UNB,THD......................................................................................................5.1
5.5 Actual values: Van (Vab) HARMONICS .........................................................................................................5.1
5.6 Actual values: Vbn (Vbc) HARMONICS..........................................................................................................5.2
5.7 Actual values: Vcn (Vca) HARMONICS..........................................................................................................5.2
5.8 Actual values: FREQUENCY..........................................................................................................................5.2
6. Menu SETPOINTS........................................................................................................................................................ 6.1
6.1 Setpoints: SETPOINT ACCESS.....................................................................................................................6.1
6.2 Setpoints: SYSTEM SETUP...........................................................................................................................6.1
6.3 Setpoints: DATE & TIME................................................................................................................................ 6.2
6.4 Setpoints: VOLTAGE PROTECTION.............................................................................................................6.3
6.5 Setpoints: FREQUENCY PROTECTION........................................................................................................6.4
6.6 Setpoints: OUTPUT RELAY......................................................................................................................... 6.10
6.7 Setpoints: DIGITAL INPUT...........................................................................................................................6.11
6.8 Setpoints: EVENT RECORDER...................................................................................................................6.11
6.9 Setpoints: MODBUS COMMUNICATION..................................................................................................... 6.12
6.10 Setpoints: BLUETOOTH ..............................................................................................................................6.13
6.11 Setpoints: FIRMWARE UPDATE .................................................................................................................6.13
6.12 Setpoints: CALIBRATION MODE.................................................................................................................6.13
7. Menu EVENTS.............................................................................................................................................................. 7.1
7.1 EVENT LIST..................................................................................................................................................7.1
7.2 CLEAR EVENTS............................................................................................................................................7.1
8. Menu RESET ................................................................................................................................................................8.1
8.1 RESET...........................................................................................................................................................8.1
9. Troubleshooting .......................................................................................................................................................... 9.1
APPENDIX A
APPENDIX B
APPENDIX C

1. General Information
VFR Voltage Frequency Relay 1.1 Instruction Manual: VFR GBM 06/10/2021
1. General Information
(*) The following options are available depending on the VFR model version [General Information: 1.9 ORDER CODE].
1.1 DESCRIPTION
The device has been designed for continuous monitoring of the system’s voltage, frequency and related variations. It is able to
disconnect one or more loads in case of underfrequency (up to 7 stages) or frequency negative rate of change (up to 2 stages).
The VFR protects industrial and commercial power networks in case of voltage disturbances.
1.2 APPLICATIONS
•Commercial, industrial and public utility
1.3 DIGITAL MEASUREMENT*
•Phase and Line Voltages
•Phase Sequence
•Voltage Average
•Voltage Unbalance
•Voltage THD
•Voltage Harmonics
•Frequency (Hz)
•Frequency variation (negative rate of change df/dt)
1.4 FEATURES
•Digital input functions:
oRemote TRIP
oRemote RESET
1.5 APPLICABILITY
•Systems: Wye or Delta three-phase
•Frequency: 60 Hz
•Voltage: up to 277/480Vac (direct measure) or up to 65kV with external VT
1.6 COMMUNICATION
•RS485 port, Modbus RTU Protocol
1.7 SIGNALLING AND PROGRAMMING
•Graphic LCD & LED based HMI
•Indication of fault conditions
•Indication of the relay status
•Available leds:
Led
Description
Duty Cycle
Status
-Slow blinking: the device is switched ON and the self-diagnosis has not encountered any
problems.
-Fast blinking: this means an error in discrepancy, flash memory, RAM memory, ADC or
Bluetooth BLE. See [Troubleshooting].
OFF = 3s
ON = 0.1s
OFF = 0.3s
ON = 0.3s
Memory
If ON: a new event has occurred
It will turn OFF after RESET or after access to the EVENT LIST
-
Trip
If ON: the protection function has activated the related relay.
It will turn OFF after RESET
-
In case of discrepancy, check [Troubleshooting].
1.8 PROTECTION AND FUNCTIONALITY*
•Over Voltage
•Under Voltage
•Phase Sequence
•Underfrequency (up to 7 stages)
•Overfrequency (up to 3 stages)
•df/dt (up to 2 stages)

1. General Information
VFR Voltage Frequency Relay 1.2 Instruction Manual: VFR GBM 06/10/2021
*Depending on VFR version
1.9 SPECIFICATIONS
SUPPLY VOLTAGE
80V (115V) 264V (300V) Vac (Vdc)
24Vdc -15%, +10%,
48Vdc -15%, +10%
TEMPERATURE
Operational: -20°C +55°C
Storage temperature: -30°C to +70 °C
DIELECTRIC WITHSTAND VOLTAGE
2 kVac, 60s from all circuits and enclosure
2 kVac, 60s between HLV and LV circuit
ELECTRICAL INSULATION CONSTRUCTION
OverVoltage category: III
Pollution degree: 2
Altitude: 2000m (AMSL)
VOLTAGE INPUTS
Rated Input: 240V/120V Vac (ph-ph/ph-N) 50/60 Hz
VT burden: 0,5 VA max.
Max. Continuous: 300 Vac phase-neutral
System: 3 wires, 4 wires
External VT: Wye/Wye or Delta/Delta
MEASURED PARAMETERS
RMS Voltage*: AN, BN, CN; AB+, BC+, CA+. For ratings:
See Voltage Inputs.
Voltage Unbalance*: Range 0→100%
Voltage Harmonics*: Up to 11th
Frequency*: Based on Voltage Vab
Range: 60Hz +5,-15Hz
df/dt*: Based on Voltage Vab
Range: ±0.01Hz/s →±5Hz/s
ACCURACY
Voltage: cl. 1% ± 1 digit
Frequency: ± 0.01 Hz ± 1 digit
df/dt: ± 0.1Hz/s ± 1 digit
DIGITAL INPUT
(2) dry contacts
Max connection lengths: 3mt
Rated Voltage: 5 Vdc internally powered
MAX. POWER CONSUMPTION
7 VA (5 W)
RELATIVE HUMIDITY
Max. 90% (non-condensing)
BURN IN
48 hours at 50 °C
OUTPUT CONTACTS
Aux1, Aux2, Aux3, Aux4, Aux5:
Rated Load: 3A@240Vac (Resistive)
3A@30Vdc (Resistive)
Max Switching Voltage: 277Vac/30Vdc
Max Continuous current: 3A
Aux6, Aux7,Aux8:
Rated load: 8A@ 240Vac Resistive
8A@ 24Vdc Resistive (0,2 A @125 Vdc)
Max Switching Voltage: 400 Vac / 150 Vdc
Max Continuous current: 5 A
COMMUNICATION
RS-485 serial port
Protocol: Modbus RTU-Slave
Insulation: 1.5 kVdc
Bluetooth: 4.2 (for manufacturer use only)
UNDERVOLTAGE MONITORING*
Number of Stage: 1
Required voltage: >0,5V at voltage inputs, applied in all phases
Pickup level: 30% →99% of Vn, Steps: 1%
Reset level: 31% →100% of Vn, Steps: 1%
Delay time: 0.1s →600s
Steps: 0.01s (from 0.1s to 1s); 0.1s (from 1s to 10s);
1s (from 10s to 600s)
Phases: Any one, any two, all three (programmable)
Minimum Operation level: 0 → 50% of Vn
Accuracy: See Voltage Inputs
Timing accuracy: ± 0.1s or 1% setpoint (worst case)
OVERVOLTAGE MONITORING*
Number of Stages: 1
Pickup level: 101% →150% Vn (Must be under max input V)
Steps: 1%
Reset level: 100% →149% Vn, Steps: 1%
Delay time: 0.1s →600s
Steps: 0.01s (from 0.1s to 1s); 0.1s (from 1s to 10s);
1s (from 10s to 600s)
Phases: Any one, any two, all three (programmable)
Accuracy: See Accuracy
Timing accuracy: ± 0.1s or 1% setpoint (worst case)
PHASE REVERSAL MONITORING*
Delay time: Fixed 0.5s
Timing accuracy: ± 0.1s
UNDER FREQUENCY MONITORING*
Number Stage:7
Required voltage: >5.1V at voltage input Vab
Pickup level: 47.0 →59,9Hz, Steps: 0.1Hz
Reset level: 47.1 →60Hz, Steps: 0.1Hz
Delay time: 0.1 →600s, Steps: 0.01s (from 0.1s to 1s);
0.1s (from 1s to 10s); 1s (from 10s to 600s)
Threshold Accuracy: See Accuracy
Timing accuracy: 35ms max, df/dt Cycle=6, (Pickup-Freq)>=
0,05Hz
25ms max, df/dt Cycle=6, (Pickup-Freq)>=
0,5Hz
or 1% setpoint (worst case)
df/dt Cycle=5 add 10ms to max value
df/dt Cycle=4 add 20ms to max value
OVER FREQUENCY MONITORING*
Number Stage:3
Required voltage: >5,1V at voltage input Vab
Pickup level: 50.1 →63Hz, Steps: 0,1Hz
Reset level: 50.0 →62,9Hz, Steps: 0,1Hz
Delay time: 0.1 →600s, Steps: 0.01s (from 0.1s to 1s);
0.1s (from 1s to 10s); 1s (from 10s to 600s)
Threshold Accuracy: See Accuracy
Timing accuracy: 35ms max, df/dt Cycle=6, (Freq-Pickup)>=
0,05Hz
25ms max, df/dt Cycle=6, (Freq-Pickup)>=
0,5Hz
or 1% setpoint (worst case)
df/dt Cycle=5 add 10ms to max value
df/dt Cycle=4 add 20ms to max value
df/dt MONITORING*
Number Stage:2
Required voltage: >5,1V at voltage input Vab
Pickup level: - 0.6 →-2.0Hz/s, Steps: 0.01Hz
Startup level: 48.0 →60.0Hz, Steps: 0.1Hz
Delay time: 0.1 →3.0s, Steps 0.01s
Threshold Accuracy: See Accuracy
Timing accuracy: 55ms max, df/dt=110% pickup level
15ms max, df/dt=200% pickup level
def: Timing error = Trip time –(delay time + df/dt cycles)

1. General Information
VFR Voltage Frequency Relay 1.3 Instruction Manual: VFR GBM 06/10/2021
MECHANICAL
Back connection, section 2.5 mm² or 14 AWG
Frame: Noryl auto-extinguish
IP40 Front (up to IP54 front, on request)
Dimension: 96 x 96 x 146 mm.
Front panel cutout: 91-0,5x 91-0,5 mm
Weight: 700 gr.
STANDARDS
Low voltage directive: IEC 60255-27, IEC 60255-5
EMC directive: IEC 60255-26
FIRMWARE UPGRADE
via RS-485 Serial Port
*Depending on VFR version
+Depending on Voltage connection type
1.10 ORDER CODE
Metering
Protections (ANSI)
Events
Communication Port
Model
Phase
&
Line
Voltage
Phase
Sequence
Voltage
Unbalance
Voltage
THD
Voltage
Harmonics
Freq.
df/dt
27
59
47
81u
81o
81df/dt
Modbus
RTU
& Bluetooth ready
VFR-1001
o
o
o
o
o
o
o
o
o
VFR-1002
o
o
o
o
o
o
o
o
o
o
o
o
VFR-1003
o
o
o
o
o
o
o
o
o
o
o
o
o
o

2. Installation
VFR Voltage Frequency Relay 2.1 Instruction Manual: VFR GBM 06/10/2021
2. Installation
2.1 DESCRIPTION
The back panel label of the relay details the following information:
ORION ITALIA
www.orionitalia.com
MADE IN ITALY
POWER SUPPLY
VOLTAGE INPUTS RATING
MODEL: VFR
SERIAL No.
2.2 UNPACKING
The standard packaging includes:
-VFR Relay
-instruction manual
-fixing elements
-Test Report (if required)
Inspect the unit and inform ORION ITALIA of any damage.
If reshipment is required, the original container and packing should be used.
2.3 MOUNTING
The mounting should be carried out as follows:
1. Install the relay in a place where the humidity and temperature are those for which it has been designed [General Information:
1.8 SPECIFICATIONS] and away from high current conductors and sources of strong magnetic fields.
2. Put the relay on a panel so that the keypad is easily accessible, and the display is visible.
3. Make a cutout in the panelboard [Figure 2.1] and fix the relay by using the fixing elements provided.
Figure 2.1
Overall dimensions

2. Installation
VFR Voltage Frequency Relay 2.2 Instruction Manual: VFR GBM 06/10/2021
2.4 WIRING
The electrical connections are made by terminal blocks on the back side of the unit.
CONNECTIONS
TERMINALS No.
Power Supply
1-2-3
Output Relays:
AUX1
AUX2
AUX3
AUX4
AUX5
AUX6
AUX7
AUX8
56-55
56-54
56-53
56-52
56-51
15-16
13-14
10-11-12
Voltage Inputs
31-32-33-34
NOT USED
21-22-23-24-25-26
Digital Inputs
41-42-43
Before carrying out the installation of the unit, it is necessary to read and understand the indications provided by the
Constructor. All the installation operations must be carried out by qualified personnel with adequate knowledge of the
functioning of the unit and of the content of this manual.
The control power, current/voltage input and output contacts must be connected according to the supply voltage connection
diagram included in the present manual. Ensure applied currents/voltages abide by the product’s ratings indicated on the relay
label.
Further information: →1.8 Specifications
Figure 2.2 –Rear view

2. Installation
VFR Voltage Frequency Relay 2.3 Instruction Manual: VFR GBM 06/10/2021
Note: Precautions must be taken in system designs to avoid potential high electromagnetic disturbance which may result in
unstable network and malfunction of the relays.
21 22 23 24 25 26
31 32 33 34
1 2 3 10 11 12 13 14 15 16 90 91
A
B
C
ORIONITALIA
VFR- 100x
RS-485 Master
+
-
VOLTAGE
INPUTS
Vn=277/480Vac
AUX8 AUX7 AUX6
A
B
C
voltage transformersconnection
DELTA
a(32)
b(33)
c(34)
LOWVOLTAGE THREE-PHASE SYSTEM
(B)
+
(A)
-
AUXILIARY POWER
80(115)-230(300) Vac(Vdc)
24Vdc
48Vdc
n.u -+
N
51 52 53 54 55 56
AUX5
AUX4
AUX3
AUX2
AUX1
41 42 43
DI.com
DI.1
DI.2
A
B
C
a(32)
b(33)
c(34)
voltage transformersconnection
WYE
Nn(31)
Not Used
Note:
* Output Contacts AUX1 - AUX8:
Use surge suppressor on output
contacts when control contactors
or inductive loads
° Digital Inputs:
3mMaxwiring lenght
(°)
seeOrderCode
K
A1
A2
Figure 2.4 –Surge suppressors on contactor coils
Figure 2.3 –Wiring diagram

2. Installation
VFR Voltage Frequency Relay 2.4 Instruction Manual: VFR GBM 06/10/2021
2.5 COMMUNICATIONS
Thanks to the serial port the monitoring and control of the relay can be made by a SCADA system, a PC or PLC device.
The ports provided are:
1 two-wire RS-485 port
→
1 twisted pair which transmits and receives alternatively is used for the data
TX and RX
Bluetooth connectivity
→
BLE 4.2 standard (for manufacturer use only)
For the RS-485 port use shielded & twisted pair wire to minimize communication errors from noise.
A suitable type of wire is: BELDEN#9841, AWG 24 which is shielded and with a characteristic impedance of 120 .
Ground the shield only at one point [Figure 2.5]
For the RS-485 port a maximum of 35 relays can be daisy chained together in parallel mode on a communication channel for a
MAXIMUM DISTANCE OF 1000 METERS.
For larger systems, additional RS-485 channels must be added.
To increase the number of relays over 35 on single channel, consult the relay constructor.
2.6 POWER SUPPLY
Voltage ranges for the relay →[General Information: 1.8 SPECIFICATIONS]
Power supply connection terminals →[Installation: 2.4 WIRING]
The relay has no internal fuses, external protection should be applied.
Orion Italia advices the use of 1 A timed external fuse.
Figure 2.5 –Communications

3. Main Menu, Autoscroll and Pop-Up Functions
VFR Voltage Frequency Relay 3.1 Instruction Manual: VFR GBM 06/10/2021
3. Main Menu, Autoscroll and Pop-Up Functions
3.1 MENU STRUCTURE
You can have access to the Main Menu by turning on the unit. The display shows the following options:
RELAY STATUS
→
status of the relay
ACTUAL VALUES
→
display of metering values
SETPOINTS
→
set up the general system and functions
EVENTS
→
visualize the last events stored and possibly clear them all
RESET
→
reset the VFR
Below, you can find the representation of the complete structure consisting of the Relay Main Menu and sub-menus.
Main Menu
Relay Status
Actual Values
Events
Setpoints
▼▲
Line Voltages
▼▲
Phase Voltages
▼▲
Phase Sequence
▼▲
Volt. Avg,Unb,THD
▼▲
Van Harmonics
▼▲
Vbn Harmonics
▼▲
Vcn Harmonics
▼▲
Frequency
Setpoint Access
▼▲
System Setup
▼▲
Date & Time
▼▲
Voltage Protect.
▼▲
Frequency Protect.
▼▲
Output Relay
▼▲
Bluetooth
▼▲
Firmware Update
▼▲
Calibration Mode
▼▲
Reset
▼▲
Digital Input
▼▲
Event Recorder
▼▲
Modbus Comm.
▼▲
Event List
▼▲
Clear Events

3. Main Menu, Autoscroll and Pop-Up Functions
VFR Voltage Frequency Relay 3.2 Instruction Manual: VFR GBM 06/10/2021
3.2 AUTOSCROLL FUNCTION
When the user turns on the VFR, the unit will cyclically show the following screens:
Line Voltages, Phase Voltages+, Frequency, Relay Status.
The Autoscroll mode will also be activated five (5) minutes after complete inactivity.
To exit, press any key on the VFR to return to the Main Menu. +Depending on Voltage connection type
3.3 POP-UP FUNCTION
Whenever there is a fault condition, the VFR display will immediately show a POP-UP screen with the cause of the last
protection intervention and the corresponding time stamp. To exit, press ⮌ESC.
3.4 MENU SURFING
To surf the menus, use one of the following keys:
▲
UP
→
move through the previous options of each menu
▼
DOWN
→
move through the next options of each menu
↲
ENTER
→
access the selected option
⮌
ESC
→
go back to the previous menu
3.5 PASSWORD MANAGEMENT
The VFR has three levels of password-granted authorizations:
FIRST LEVEL
→
view Actual Values and modify Setpoints.
A First-Level password cannot navigate through some of the options in the Calibration Mode
menu [APPENDIX A].
How to Set or Modify a First-Level password
DEFAULT FIRST-LEVEL PASSWORD: 1111
Setpoint Access
ORION ITALIA
VFR F.V. X.XX
To modify the First-Level password, press ENTER.
Setpoint Access
ORION ITALIA
VFR F.V. X.XX
Enter Password
- - - -
Insert the current First-Level password and press ENTER.
To edit and store the password, see [Main Menu, Autoscroll and Pop-Up
Functions: 3.6 EDITING AND STORING KEYS].
Password correct >> Setpoint Enabled.
This screen does not appear if the user has previously entered the correct
password.
Setpoint Access
Press Enter to Modify
the Password
Otherwise press
or Esc
Press ENTER and insert a new First-Level password.
Insert new password >> New Password Stored.
By changing the First-Level password, the Second-Level password will automatically change.
SECOND LEVEL
→
access every option on the First Level, some options on the Calibration Mode menu
[APPENDIX A].
This password is obtained by adding 1 (to the first digit), 2 (to the second digit), 3 (to the third
digit) and 4 (to the fourth digit) of the First-Level password.
No digit in the resulting password can equal zero (0). If the sum of the two digits is greater
than ten (10), only the unit will be considered. If the sum equals ten (10), the digit will become
one (1)

3. Main Menu, Autoscroll and Pop-Up Functions
VFR Voltage Frequency Relay 3.3 Instruction Manual: VFR GBM 06/10/2021
For example: PSW1 = 9896 (new user password)
PSW1 = 1111 (factory default)
THIRD LEVEL
→
in this case, the user must contact Orion Italia to obtain the code.
It allows access to every option on the Second Level and the ability to alter the VFR
calibration settings [APPENDIX A].
3.6 EDITING AND STORING KEYS
To edit and store data, use the following keys:
▲
UP
→
increase the value
▼
DOWN
→
decrease the value
↲
ENTER
→
highlight the option and press ENTER to modify.
Change the value, press ENTER to store
For example:
How to Change Phase CT Rating
Scroll ▲ or ▼and highlight the desired option, as shown in the following representation.
On the Main Menu, the user must select [6.2 Setpoints: SYSTEM SETUP]
System Setup
VT Rated Secondary
100 /√3 V
VT Rated Primary
1.0 /√3 kV
To modify the VT Rated Secondary value, press ENTER.
The VFR will ask the user to insert a password.
System Setup
VT Rated Secondary
100 /√3 V
Enter Password
- - - -
Press ▲ or ▼ to select the first digit of the password, press ENTER.
Repeat for the second, third and fourth digit.
Password correct >> Setpoint Access Enabled
Password incorrect >> Setpoint Access Disabled
This screen does not appear if the user has previously inserted the correct
password and if the unit has not entered Autoscroll mode.
System Setup
VT Rated Secondary
Value
Password correct >> when the value blinks, press ▲ or ▼ to modify.
Press ENTER to store the new setpoint >> Setpoint Stored.
3.7 FUNCTION KEY
F
→
On the Main Menu or in Autoscrollmode, press F and access the two available QR Codes by scanning them
with a mobile phone or tablet equipped with internet.
Technical Support QR Code ▲ or ▼ Product Info QR Code.
PSW1
9
8
9
6
DEFAULT
PSW1
1
1
1
1
+
1
2
3
4
+
1
2
3
4
=
10
10
12
10
=
2
3
4
5
PSW2
1
1
2
1
PSW2
2
3
4
5

3. Main Menu, Autoscroll and Pop-Up Functions
VFR Voltage Frequency Relay 3.4 Instruction Manual: VFR GBM 06/10/2021
3.8 SYMBOLS USED IN THE TEXT
This figure on the left represents the relay display.
This screen only appears if the statement on the left is applied.
[Main Menu option: SECTION]
If x = x
Symbol
;
→
Select among the elements on the list

→
Select any value within the indicated parameters
For example:
RANGE: 2; 3; 6 →select 2, or 3, or 6.
RANGE: 2 6 →select 2, or 3, or 4, or 5, or 6.
FRONT PANEL

4. Menu RELAY STATUS
VFR Voltage Frequency Relay 4.1 Instruction Manual: VFR GBM 06/10/2021
4. Menu RELAY STATUS
4.1 RELAY STATUS
Relay Status
No Active Protection
Check Events
This section provides information on the Relay Status.
For example, the display could indicate protection interventions, internal faults
and/or setpoint discrepancies.
In the presence of more than four (4) alerts, navigate the list with the help of ▲ or
▼.
Normal conditions >> No Active Protection
[APPENDIX B] for all possible status.

5. Menu ACTUAL VALUES
VFR Voltage Frequency Relay 5.1 Instruction Manual: VFR GBM 06/10/2021
5. Menu ACTUAL VALUES
(*) The following options are available depending on the VFR model version [General Information: 1.9 ORDER CODE].
5.1 Actual values: LINE VOLTAGES
Line Voltages
Vab= 0.00 V
Vbc= 0.00 V
Vca= 0.00 V
RMS value of Line Voltages.
5.2 Actual values: PHASE VOLTAGES
Phase Voltages
Van= 0.00 V
Vbn= 0.00 V
Vcn= 0.00 V
RMS value of Phase Voltages.
[6.2 Setpoints: SYSTEM SETUP]
If VT Connection = Wye
5.3 Actual values: PHASE SEQUENCE
Phase Sequence
None
RANGE: NONE; ABC; ACB
NONE: when the VFR is not capable of detecting the Phase Sequence.
For instance, in case of phase loss or insufficient voltage.
ABC: Direct sequence
ACB: Inverse sequence
5.4 Actual values: VOLTAGE AVG,UNB,THD
Voltage Avg,Unb,THD
Voltage Avg= 0.00 V
Voltage Unb= 0.0 %
THD= 0.0%
(*)
-Average of the 3 RMS values of line voltages
Vavg=(|VAB| + |VBC| + |VCA|)/3.
-Unbalance line voltages percentage (maximum of the three unbalance
values).
-Voltage THD value (Voltage Total Harmonic Distortion).
5.5 Actual values: Van (Vab) HARMONICS
View the 11 Harmonics related to the phase voltage or line voltage if Delta is selected in [6.2 Setpoints: SYSTEM SETUP: VT
Connection].
Van Harmonics
Van2nd= 0.0 %
…
Van11th= 0.0 %
(*)
Van Harmonics percentage values.
Press ▲ or ▼ to visualize all values.
If Delta VT Connection, Harmonics of Vab will be shown.
Actual Values
Line Voltages
Phase Voltages
Phase Sequence
Volt. Avg,Unb,THD
Van Harmonics
Vbn Harmonics
Vcn Harmonics
Frequency

5. Menu ACTUAL VALUES
VFR Voltage Frequency Relay 5.2 Instruction Manual: VFR GBM 06/10/2021
5.6 Actual values: Vbn (Vbc) HARMONICS
View the 11 Harmonics related to the phase voltage or line voltage if Delta is selected in [6.2 Setpoints: SYSTEM SETUP: VT
Connection].
Vbn Harmonics
Vbn2nd= 0.0 %
…
Vbn11th= 0.0 %
(*)
Vbn Harmonics percentage values.
Press ▲ or ▼ to visualize all values.
If Delta VT Connection, Harmonics of Vbc will be shown.
5.7 Actual values: Vcn (Vca) HARMONICS
View the 11 Harmonics related to the phase voltage or line voltage if Delta is selected in [6.2 Setpoints: SYSTEM SETUP: VT
Connection].
Vcn Harmonics
Vcn2nd= 0.0 %
…
Vcn11th= 0.0 %
(*)
Vcn Harmonics percentage values.
Press ▲ or ▼ in order to visualize all values.
If Delta VT Connection, Harmonics of Vca will be shown.
5.8 Actual values: FREQUENCY
Frequency
Frequency= 0.00 Hz
df/dt = 0.00 Hz/s
System Frequency value (Hz) and Frequency Variation (df/dt).
The VFR calculates frequency from voltage input terminal 32-33 (A-B Line
voltage).
In case the metering of the line voltage cannot be done accurately, the frequency,
df/dt and frequency protection will be disabled.