ORION ITALIA IPR-A2 User manual

O R I O N I T A L I A
INSTRUCTION MANUAL
IPR-A2
Current protection relay
Software rev.: IPR-A2 S2.01
Manual P/N: IPR-A2 GBM 30/06/2019
Via G. Orsi 35, 29122 Piacenza [PC] –Italia
Phone: + 39 0523 591161, Fax: + 39 0523 593898, Internet: www.orionitalia.com

CURRENT PROTECTION RELAY - IPR-A Manual P/N: IPR-A2 GBM 30/06/2019
SAFETY NORMS 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, segregation and environmental conditions) 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 ratings of the unit (voltages, frequencies, etc.) 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.
Disconnect the unit before carrying out any hipot testing 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 followed. Pay attention to the
information signalled by this symbol, as it refers to situations that 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 request please contact:
ORION ITALIA TECHNICAL ASSISTANCE
TEL: [phone] FAX: [phone] INTERNET: www.orionitalia.com

CURRENT PROTECTION RELAY - IPR-A Manual P/N: IPR-A2 GBM 30/06/2019
I N D E X
1. GENERAL INFORMATION.................................................................................................1.1
1.1 Description.......................................................................................................................................................1.1
1.2 Applications.....................................................................................................................................................1.1
1.3 Protection and functionality...........................................................................................................................1.1
1.4 Digital measurement......................................................................................................................................1.3
1.5 Signalling and programming.........................................................................................................................1.3
1.6 Communication...............................................................................................................................................1.3
1.7 Specification....................................................................................................................................................1.3
1.8 Order code.......................................................................................................................................................1.6
2. INSTALLING............................................................................................................................2.1
2.1 Identification....................................................................................................................................................2.1
2.2 Unpacking........................................................................................................................................................2.1
2.3 Mounting..........................................................................................................................................................2.1
2.4 Wiring –output relay and digital inputs........................................................................................................2.2
2.5 Current transformers (CT).............................................................................................................................2.4
2.6 Circuit breaker status and control connections ..........................................................................................2.4
2.7 Communications.............................................................................................................................................2.4
2.8 Control power..................................................................................................................................................2.6
2.9 System grounding...........................................................................................................................................2.6
2.10 Hipot testing ....................................................................................................................................................2.6
3. HOW TO USE THE MENU..................................................................................................3.1
3.1 Menu structure................................................................................................................................................3.1
3.2 Menu access...................................................................................................................................................3.1
3.3 Menu surfing....................................................................................................................................................3.1
3.4 Selecting and storing keys............................................................................................................................3.1
3.5 Quick surfing guide.........................................................................................................................................3.2
3.6 Symbols used in the text ...............................................................................................................................3.2
3.7 Menu structure................................................................................................................................................3.3
3.8 How to use SETPOINTS and ACTUAL VALUES keys.............................................................................3.5
4. "SETPOINTS" MENU...........................................................................................................4.1
4.1 Setpoints page 1: SETPOINT ACCESS.................................................................................................4.1
4.1.1 Relationship between Function and Output Relay............................................................4.2
4.2 Setpoints page 2: SYSTEM SETUP........................................................................................................4.3
4.3 Setpoints page 3: Ph PROTECTIONS....................................................................................................4.5
4.4 Setpoints page 4: Gnd. PROTECTIONS................................................................................................4.7
4.5 Setpoints page 5: NOT AVAILABLE........................................................................................................4.8
4.6 Setpoints page 6: AUTORECLOSE.........................................................................................................4.9
4.7 Setpoints page 7: OUTPUT RELAYS................................................................................................... 4.11
4.8 Setpoints page 8: DIGITAL INPUTS..................................................................................................... 4.13
4.9 Setpoints page 9: EVENT RECORDER.............................................................................................. 4.13
4.10Setpoints page 10: DATE & TIME.........................................................................................................4.14
4.11Setpoints page 11: COMMUNICATIONS............................................................................................ 4.15
4.12Setpoints page 12: CALIBRATION MODE......................................................................................... 4.15

CURRENT PROTECTION RELAY - IPR-A Manual P/N: IPR-A2 GBM 30/06/2019
5. MENU "ACTUAL VALUES" .............................................................................................. 5.1
5.1 Actual values 1: CURRENT DATA .......................................................................................................5.1
5.2 Actual values 2: LAST TRIP DATA.......................................................................................................5.1
5.3 Actual values 3: EVENTS........................................................................................................................ 5.2
5.4 Actual values 4: MAINTENANCE DATA.............................................................................................5.2
5.5 Actual values 5: AUTORECLOSE.........................................................................................................5.3
6. AUTOMATIC OPERATION................................................................................................ 6.1
6.1 Automatic operation condition...................................................................................................................... 6.1
7. EVENTS RECORDER.......................................................................................................... 7.1
7.1 Definition of “event” and storing................................................................................................................... 7.1
7.2 Events format..................................................................................................................................................7.1
8. TROUBLESHOOTING......................................................................................................... 8.1
9. WARRANTY............................................................................................................................ 9.1
APPENDIX A –Tables and time-current curves.............................................................A.1
ANSI curves..........................................................................................................................................................................A.2
IAC curves ............................................................................................................................................................................A.3
IEC curves ............................................................................................................................................................................A.4
Diagrams...............................................................................................................................................................................A.5

Chapter 1: General information
CURRENT PROTECTION RELAY - IPR-A Manual P/N: IPR-A2 GBM 30/06/2019
1.1
1. General Information
1.1 DESCRIPTION
Thanks to the measuring of phase and ground currents by means of current transformers (CT), IPR-A current
protection relay can perform protection functions according to ANSI, IAC or IEC standards. Thanks also to the
indications at the digital inputs the device can inform for example about the status of circuit breaker or
disconnector to which it is coupled, operate on the outputs and disable some functions.
1.2 APPLICATIONS
•Primary or secondary protection for generation and distribution systems.
•Protection of transformers, overhead lines, cables, motors and generators.
•It allows the opening of the disconnector within the limits of its capacity, leaving the circuit interruption to the
back-up fuses in case of short-circuit.
1.3 PROTECTION AND FUNCTIONALITY
Description ANSI
•CT primary ratio selectable in 5 A steps (10 A 5000 A).
•Instantaneous phase overcurrent..................................................................................................................... 50
•Instantaneous ground overcurrent........................................................................................................50N / 50G
•Inverse-time phase overcurrent........................................................................................................................ 51
Inverse-time ground overcurrent ..........................................................................................................51N / 51G
Inverse-time negative sequence overcurrent ................................................................................................... 46
with curve selection according to ANSI, IAC or IEC/BS142:
- moderately inverse
- normally inverse
- very inverse
- extremely inverse
- definite time
•Autoreclosure................................................................................................................................................... 79
•Current Unbalance
•Overload alarm level
•KA accumulated per phase on circuit breaker interruption
•Integral relay test with or without the output contacts intervention
•1 trip relay
•3 auxiliary relays that can be associated with the various functions (2 programmable relays and 1 relay
controlling any loss of auxiliary voltage -SERVICE-).
Information
The following information concerns the use of the Actual values and the Setpoints.
OVERCURRENT PROTECTION
IPR-A continuously checks the 3 phase currents and the ground current in the line by means of its CTs and
activates an alarm and/or the circuit breaker trip when a value exceeds the set level (called Pickup level):
1. possibility of separately setting of the timed and instantaneous overcurrent;
2. no intrinsic delay of the device is added to the instantaneous intervention;
3. separate managing of the phase and ground overcurrent setpoints;
4. phase and ground overcurrent alarm and trip delay according to time-current curve set and to the entity of
current.

Chapter 1: General information
CURRENT PROTECTION RELAY - IPR-A Manual P/N: IPR-A2 GBM 30/06/2019
1.2
The 5 selectable time-current curve shapes are the following:
- moderately inverse
- normally inverse
- very inverse
- extremely inverse
- definite time
The 3 programmed curve types are the following:
- ANSI
- IAC
- IEC / BS142
All curve shapes have a time multiplier (M) allowing modifying the trip time.
For the 3 possible curve types and their shapes see: →Appendix A
REMARK: when selecting the curve for the circuit breaker trip, make sure the max. input current to IPR-A
does not exceed 100 A for more than 1 second the wrong combination of time and current could
damage the unit and consequently provoke the loss of protection.

Chapter 1: General information
CURRENT PROTECTION RELAY - IPR-A Manual P/N: IPR-A2 GBM 30/06/2019
1.3
1.4 DIGITAL MEASUREMENT
1. RMS current of each phase
2. Ground RMS current
1.5 SIGNALLING AND PROGRAMMING
•LCD & LED display indication
•Indication and storage of fault conditions and their values
•Indication on the system status
SYSTEM STATUS
LED
- circuit breaker or disconnector closed
[BREAKER CLOSED]
- circuit breaker or disconnector open
[BREAKER OPEN]
- circuit breaker or disconnector earthed
[BREAKER EARTHED]
- function ANSI 79 - Reclosure - active
[RECLOSURE ENABLED]
- function ANSI 79 - Reclosure –Reclosing in progress
[RECLOSURE IN PROGRESS]
- reaching of the inverse-time overcurrent pickup level
PICKUP I > (51)
- reaching of the instantaneous phase overcurrent pickup level
PICKUP I >> (50)
- reaching of the inverse-time ground overcurrent pickup level
PICKUP Io > (51N/G)
- reaching of the of the instantaneous ground overcurrent pickup level
PICKUP Io>> (50N/G)
•Indication of the relay status
RELAY STATUS
LED
- LED “On”: the output relay has tripped to open the circuit breaker or
disconnector. It stays “on” even when the output relay is programmed with
PULSED mode
- LED “Off”: it switches off when pressing RESET key only if the condition
causing the fault is no more present
[TRIP]
- intervention for reaching the phase or ground currents alarm setpoint
[ALARM]
- relay "out of service" due to internal fault
[OUT OF SERVICE]
1.6 COMMUNICATION
•Remote communication using a PC or a PLC by 2 RS485 ports or 1 RS232 port
•Local and remote setting of the relay protections and features
•Fault and event recorder for statistical analysis
•Self-explicative program requiring no additional programming
•Remote opening or closing of the circuit breaker or disconnector
1.7 SPECIFICATION
SUPPLY VOLTAGE
24÷310 Vdc, –15%, +10%
24÷240 Vac, –15%, +10%, 50/60Hz
POWER CONSUMPTION
7W, 12 VA (max)
TEMPERATURE RANGES
Operational: from 0 °C to +50 °C
Storage: from –20 °C to + 70 °C
RELATIVE HUMIDITY
Max.: 90% (non condensing)

Chapter 1: General information
CURRENT PROTECTION RELAY - IPR-A Manual P/N: IPR-A2 GBM 30/06/2019
1.4
DIELECTRIC WITHSTAND VOLTAGE
2 KV 60 s
BURN IN
48 hours at 50 °C
ENVIRONMENTAL FEATURES
The relay must be installed in a room with the following
features:
- indoor,
- dry, not dusty and not corrosive atmosphere.
CONSTRUCTION
In compliance with VDE, UL, CEI standards.
OUTPUT CONTACT
Load: resistive (p.f.= 1)
inductive (p.f.= 0.4; L/R = 7 ms)
Rated load: 250 Vac, 8 A or 30 Vcc, 8 A with p.f.=1
250 Vac, 5 A or 30 Vcc, 5 A with p.f.=0.4
Max. operating Voltage: 250 Vac, 125 Vcc
Max. operating Current: 8 A
Capacity: 2000 VA, 240 W with p.f.=1
1250 VA, 150 W with p.f.=0.4
DIGITAL INPUT
Type: Dry contacts
Output: 24 Vdc, 10 mA (stabilized)
LED INDICATORS
Relay status: Trip, Alarm, Service
System status: Closed circuit breaker, open circuit
breaker, earthed circuit breaker,
reclosure enabled, reclosure in
progress and reaching of:
Pickup level I > (51)
Pickup level I >> (50)
Pickup level I0 > (51N/G)
Pickup level I0 >> (50N/G)
Display (LCD): 16 x 2 digits
Display accuracy: Load current: 1% @ 100% CT
COMMUNICATIONS
Type: 1 4-wire RS232 port + 2 2-wire RS485
ports, Full duplex, 1200÷19200 baud
Protocol: Modbus RTU
Functions: Reading/Writing of setpoints
Reading of actual values
Executing of commands
TERMINAL BLOCK
Fixed, for cables with section: 4 mm2(12 AWG).
FRAME
Auto-extinguishing ABS with frontal in polycarbonate (IP54).
MOUNTING
The relay has to be jointed to the structure fixing it by stirrup
with screws.
DIMENSION
144 x 144 x 141 mm (→Fig. 2.1 –IPR-A overall dimensions)
FRONT PANEL CUT-OUT
137 x 137 mm
WEIGHT
1.5 Kg
APPLICABILITY
System: three-phase;
Frequency: 50 and 60 Hz;
Current: max. 5000 A;
Voltage: max. 69 kV
PHASE AND GROUND CT INPUTS
Secondary rated current: CT: 1 A or 5 A (specify with order).
Sampling: True RMS at 16 samples per
cycle.
Bandwidth: 0÷100 Hz
CT burden: 0.25 VA per phase at rated
secondary current.
Continuous: 10 A
Current withstand capacity: 100 A per 1 s
OVERCURRENT CURVES
Selection of phase and ground curves according to ANSI, IAC
or IEC.
•Moderately inverse
•Normally inverse
•Extremely inverse
•Definite time
The curves are valid up to 18 times the CT rated current
INVERSE-TIME PHASE OVERCURRENT
(51)
Pickup level: 4÷300% CT, Steps: 1%
Time multiplier: 0.1÷20.0; Steps: 0.1
Dropout level: Time resets to zero whenever
current level drops below the pickup
level.
Accuracy: ± 3% of the setting.
Delay: included in ± 3% or in ±20 ms, per
>150% of pickup level.
INSTANTANEOUS OVERCURRENT
(50)
Pickup level: 4÷1800% of CT, Steps: 10%
Current accuracy: ± 3% of the setting
Time accuracy: 35 ms max. per > 150% of the set
value
Saturation: 18 times the CT rated current.