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a
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p
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Page 2 
 
Checks on receipt. 
 
This manual assists in the installation and use of the RGU-10/RGU-10C earth leakage relay so that the best possible 
use can be gained from it. Please check the following points on receipt of the relay: 
 
•  The equipment delivered matches your order specifications. 
•  Check that the equipment has not been damaged during delivery. 
•  Check that  it has the correct instruction manual. 
 
 
 
 
This manual contains information and warnings about the RGU-10/RGU-10C which must be 
followed to guarantee the proper operation of all instrument functions and to maintain it in a 
safe condition. 
Installing and maintenance for this relay must be carried out by a qualified person. 
CONTENTS 
 
General features   ..........................………......………….......................................... page  4 
 
Installation and start-up    ...................................………...........…………............................ page  6 
 
Connection diagram    ………...........................................................…………............... page  9 
 
Description.      ……...................…………...........................................................  page     16 
 
Operation.      …….................................................………….............................  page     18 
 
Equipment settings.    ……...............................................................…………...............  page     21 
 
Setting communication SETUP  ......………..............…………......................................................  page     23 
 
Setting measuring SETUP   ...............………...................…………........................................  page     25 
 
Menu diagrams for SETUP  ………................................................………….......................... page 26 
 
MODBUS Protocol    …….................................................................………….............  page 27 
 
MODBUS memory map    ......………...............………….....................................................  page     27 
 
RS485 Connections    ……......................................…………........................................  page     29 
 
Scada PowerStudio applications  ……....................................................…………..........................  page     30