






Catalogue


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

02
1. Introduction

PRO range of relays provide reliable and high performance

protection.

The IRU-PRO is a relay for AC Voltage supervision with

universal application, it protects the three phase network
against over, under voltage, unbalance or earth faults in
isolated networks. Beside the pure RMS value measurement
of the line voltage the IRU-PRO evaluates the symmetrical
components (U1, U2 & U0 sequence system). By evaluating
these components relay IRU-PRO can detect the phase
sequence, voltage unbalance and earth faults.

2. Features & Characteristics

03
 4. Voltage Protection

3. Model for Voltage Protection



Model Pts Zero Negative Positive

Sequence Sequence Sequence
calculation calculation calculation
IRU-PRO-O 3 Numerical x x
IRU-PRO-U 3 Numerical x x
IRU-PRO-UO 3 Numerical x x
IRU-PRO-UOR 4 External PT x x
4.1 Under / Over Voltage

04
 4.6 Front Plate


        



4.2 Zero Sequence Over Voltage

IRU-PRO relays will operate from the zero sequence voltage,
which is calculated internally or from the residual voltage,
which is measured directly or internally.

4.3 Negative Sequence Over Voltage

5.0 Setting Groups

         
       


4.4 Positive Sequence Over Voltage
6.0 Measurments

        

4.5 Output Trip Contact
 
 


05
7. Event Record Star Connection
Any change of state of logic inputs, output contacts or
protection functions will be recorded in the non-volatile
memory of the IRU-PRO relays with a maximum of 100 events.
When the memory is full, the oldest events will be deleted.
Each event can be retrieved locally to a PC using the IRU-PRO
support software through front USB port or can be viewed on
LCD.

8. Fault Record
The IRU-PRO relays can store the last 10 faults that have
occurred in non-volatile memory. Fault1 is the latest fault. 11. Hardware & Case
Each record provides the following information:
         

       



9. Communication
One communication port is available on IRU-PRO relay based
on ordering information. This front USB port provides a local
communication with PC. The front end software provided for
relay is fully Windows TM compatible.

The front end software of IRU-PRO relays has following

functions:

10. User Interface

The user interface for IRU-PRO relays comprises:

06


        



       


          



         





07
14. Setting Procedure
MENU DISPLAY DESCRIPTION

08
Setting Procedure

MENU DISPLAY DESCRIPTION

09
Setting Procedure
MENU DISPLAY DESCRIPTION

10
Setting Procedure
MENU DISPLAY DESCRIPTION

11
15. Technical Data




16. VT Ratios

17. Accuracy

12
18. Setting Ranges (IRU-PRO-UOR-XX)

13
19. Connection Diagrams

* External PT Ve (on A7 & A8) will be only in IRU-PRO-UOR

Star Connection

14
 Delta Connection

20. Cases & Dimensions



144.00

15
Dimension Details 








22




Installation depth: 111 mm

16
21. Ordering Information

17
 IRU-Pro


   




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

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   
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   
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   
   
   
   
   