Circutor RGU-100B User manual

INSTRUCTION MANUAL
Protection and monitoring relay
RGU-100B
(M256B01-03-20A)

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RGU-100B
Instruction Manual

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Instruction Manual
RGU-100B
SAFETY PRECAUTIONS
DANGER
Warns of a risk, which could result in personal injury or material damage.
ATTENTION
Indicates that special attention should be paid to a specific point.
Follow the warnings described in this manual with the symbols shown below.
If you must handle the unit for its installation, start-up or maintenance, the following should be
taken into consideration:
Incorrect handling or installation of the unit may result in injury to personnel as well as damage to the
unit. In particular, handling with voltages applied may result in electric shock, which may cause death
or serious injury to personnel. Defective installation or maintenance may also lead to the risk of fire.
Read the manual carefully prior to connecting the unit. Follow all installation and maintenance in-
structions throughout the unit’s working life. Pay special attention to the installation standards of the
National Electrical Code.
Refer to the instruction manual before using the unit
In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can result
in injury or damage to the unit and/or installations.
CIRCUTOR, SA reserves the right to modify features or the product manual without prior notification.
DISCLAIMER
CIRCUTOR, SA reserves the right to make modifications to the device or the unit specifications set
out in this instruction manual without prior notice.
CIRCUTOR, SA on its web site, supplies its customers with the latest versions of the device specifica-
tions and the most updated manuals.
www.circutor.com
CIRCUTOR, recommends using the original cables and accessories that are supplied
with the device.

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CONTENTS
SAFETY PRECAUTIONS .........................................................................................................................................................3
DISCLAIMER ..........................................................................................................................................................................3
CONTENTS.............................................................................................................................................................................4
REVISION LOG .......................................................................................................................................................................6
SYMBOLS...............................................................................................................................................................................6
1. VERIFICATION UPON RECEPTION.................................................................................................................................... 7
2  PRODUCT DESCRIPTION .................................................................................................................................................7
3. INSTALLATION OF THE DEVICE .......................................................................................................................................9
3.1.- PRELIMINARY RECOMMENDATIONS ........................................................................................................................9
3.2.- INSTALLATION ....................................................................................................................................................... 10
3.3.- PANEL ADAPTER 72 x 72 mm................................................................................................................................ 10
3.4.- DEVICE TERMINALS................................................................................................................................................11
3.5.- WGB TRANSFORMERS........................................................................................................................................... 12
3.5.1. PANEL INSTALLATION ....................................................................................................................................... 12
3.5.2. INSTALLATION ON A DIN RAIL.......................................................................................................................... 13
3.5.3.- TRANSFORMER TERMINALS ........................................................................................................................... 14
3.5.4.- TRANSFORMER LEDs ...................................................................................................................................... 14
3.6.- CONNECTION DIAGRAMS....................................................................................................................................... 15
3.7.- INSTALLATION CONNECTIONS ............................................................................................................................... 16
4. OPERATION ................................................................................................................................................................... 17
4.1.- LED INDICATORS .................................................................................................................................................... 17
4.2.- DISPLAY ................................................................................................................................................................. 18
4.3.- KEYBOARD FUNCTIONS......................................................................................................................................... 19
4.4.- DIGITAL OUTPUT .................................................................................................................................................. 19
4.5.- RELAY .................................................................................................................................................................... 19
4.6.- DIGITAL INPUT....................................................................................................................................................... 19
5. DISPLAY.........................................................................................................................................................................20
5.1.- CLOCK SETUP MENU..............................................................................................................................................20
5.2.- PROBLEMS OR CHANGES IN THE INSTALLATION.................................................................................................. 21
5.3.- DISPLAY SCREENS.................................................................................................................................................22
5.4.- TRIP DISPLAY SCREENS.........................................................................................................................................23
5.5.- TEST SCREEN ........................................................................................................................................................24
5.6 .- DIRECT SETTINGS ................................................................................................................................................25
5.6.1.- PASSWORD ......................................................................................................................................................25
5.6.2.- TRIP CURRENT................................................................................................................................................25
5.6.3.- DELAY AND RELAY CURVE ..............................................................................................................................26
5.7.- EVENT MENU ..........................................................................................................................................................26
5.8.- OTHER SCREENS ....................................................................................................................................................28
6. CONFIGURATION ...........................................................................................................................................................29
6.1.- RS-485 COMMUNICATIONS ...................................................................................................................................30
6.1.1.-BAUD RATE .......................................................................................................................................................30
6.1.2.- PERIPHERAL NUMBER.................................................................................................................................... 31
6.1.3.- DATA FORMAT ................................................................................................................................................. 31
6.2.- PREALARM ............................................................................................................................................................32
6.2.1.- PREALARM CURRENT.....................................................................................................................................32
6.2.2.- PREALARM OPERATION .................................................................................................................................32
6.4.1.- PASSWORD......................................................................................................................................................33
6.3.- CLOCK SETUP ........................................................................................................................................................33
6.4.- PASSWORD ............................................................................................................................................................33
6.5.- INSTALLATION.......................................................................................................................................................34
6.5.1.- SAVE INSTALLATION .......................................................................................................................................34
6.6.- MENU EXIT .............................................................................................................................................................34
7. RS485 COMMUNICATIONS...........................................................................................................................................35
7.1.- CONNECTIONS ........................................................................................................................................................35
7.2.- MODBUS PROTOCOL ..............................................................................................................................................35
7.3.- MODBUS COMMANDS............................................................................................................................................36
7.3.1.- VARIABLES OF THE RGU100B AND INSTALLATION ......................................................................................36
7.3.2.- CHANNEL VARIABLES .....................................................................................................................................37
7.3.3.- TRIPPING DUE TO TEST OR COMMUNICATIONS .............................................................................................38

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7.3.4.- EVENTS........................................................................................................................................................... 38
7.3.5.- DEVICE CONFIGURATION VARIABLES.............................................................................................................39
8. TECHNICAL FEATURES..................................................................................................................................................42
8.1.- RGU-100B..............................................................................................................................................................42
8.2.- WGB.......................................................................................................................................................................44
9. MAINTENANCE AND TECHNICAL SERVICE ...................................................................................................................46
10. GUARANTEE ................................................................................................................................................................46
11. CE CERTIFICATE ...........................................................................................................................................................47
ANNEX A. DIRECT SETTINGS............................................................................................................................................ 50
ANNEX B. SETUP MENU.................................................................................................................................................... 51

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REVISION LOG
Table 1: Revision log.
Date Revision Description
01/20 M256B01-03-19A First Version
09/20 M256B01-03-20A Changes in the following sections:
3.6
Note: The images of the devices are for illustrative purposes only and may differ from the original
device.
SYMBOLS
Table 2: Symbols.
Symbol Description
In accordance with the relevant European directive.
Device covered by European Directive 2012/19/EC. At the end of its useful life, do not discard of
the device in a household refuse bin. Follow local regulations on electronic equipment recycling.
Direct current.
~Alternating current.

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1. VERIFICATION UPON RECEPTION
Upon reception of the device check the following points:
a) The device meets the specifications described in your order.
b) The device has not suffered any damage during transport.
c) Perform an external visual inspection of the device prior to switching it on.
d) Check that it has been delivered with the following:
- An installation guide
If any problem is noticed upon reception, immediately contact the transport com-
pany and/or CIRCUTOR's after-sales service.
2  PRODUCT DESCRIPTION
The RGU-100B is a type-B earth leakage protection and monitoring device (IEC 60755), compatible
with the earth leakage transformers in the WGB product range, and includes adjustable prealarm
leakage sensitivity and integrated RS-485 communications.
The device features:
-Display for displaying the parameters.
- 3 keys to browse through the different screens and program the device.
-Digital output, as a prealarm function.
- Digital input for external trip.
- RS-485 communications.
The WGB are a range of electronic, type-B earth leakage protection and monitoring transformers (IEC
60755) to be used with RGU-100B and CBS-400B earth leakage protection and monitoring relays.
Circutor has 4 models, depending on the maximum current of the monitored circuit (In):
WGB-35, for In: 80 A.
WGB-55 for In: 160 A.
WGB-80 for In: 250 A.
WGB-110 forIn: 400 A.

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The transformers have:
- 6 LEDs providing information about the transformer's status.
- 2 RJ45 connection and power supply ports.

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RGU-100B
3. INSTALLATION OF THE DEVICE
3.1.- PRELIMINARY RECOMMENDATIONS
In order to use the device safely, personnel operating it must follow the safety meas-
ures that comply with the standards of the country where it is to be installed; operators
must wear the required personal protective equipment (rubber gloves, approved facial
protection and flame-resistant clothing) to prevent injuries from electric shock or arcs
caused by exposure to current-carrying conductors, and they must heed the various
warnings indicated in this instruction manual.
The RGU-100B device must be installed by authorised and qualified staff.
The power supply plug must be disconnected and measurement systems switched off before handling,
altering the connections or replacing the device. It is dangerous to handle the device while it is pow-
ered.
Cables must always be kept in perfect condition to avoid accidents or injury to personnel or installa-
tions.
Restrict the operation of the device to the specified measurement category, voltage or current values.
The manufacturer of the device is not responsible for any damage resulting from failure by the user
or installer to heed the warnings and/or recommendations set out in this manual, nor for damage
resulting from the use of non-original products or accessories or those made by other manufacturers.
Do not use the device to take any measurements if an anomaly or malfunction is detected.
Check the surrounding environment before starting to take measurements. Do not take any measure-
ments in hazardous or explosive environments.
Before carrying out maintenance, repair or handling of any of the device's connections,
the device must be disconnected from all power sources, both from the device's own
power supply and the measurement's.
Contact the after-sales service if you detect that the device is not working properly.

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3.2.- INSTALLATION
When the device is on, its terminals, opening covers or removing elements may ex-
pose the user to parts that are hazardous to touch. Do not use the device until it is
fully installed.
The device must be installed inside a medium or low voltage electric panel or enclosure, with DIN rail
mounting (IEC 60715).
The device has a LED (CPU) that indicates voltage presence. Even in the case that the
aforesaid LED is off, the user still needs to check the device is disconnected from any
power supply.
The device must be connected to a power circuit protected by a fuse according to its power and con-
sumption rating. It must be fitted with a circuit-breaker or equivalent device to disconnect the device
from the power supply.
3.3.- PANEL ADAPTER 72 x 72 mm
Note: The 72 x 72 mm panel adapter is a separately sold accessory.
CIRCUTOR has a panel adapter for RGU-100B devices so that it can be installed on 72 x 72 mm panels.
Figure 1 illustrates how the panel adapter is connected to an RGU-100B.
Before installing the adapter, the device must be disconnected from all power and
measurement supplies.
Figure 1: Installation of the panel adapter.
Table 3: Technical characteristics of the Panel Adapter.
Technical Specifications
Protection degree IP40
Enclosure Self-extinguishing V0 plastic


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68 mm
68 mm
Figure 2: Cut in the panel.
3.4.- DEVICE TERMINALS
WGB
3
1
23
21
20
19
24
22
9
11
Figure 3: Terminals of the RGU-100B: Upper - Lower.
Table 4: List of RGU-100B terminals.
Device terminals
9: A1 +, Power supply 21: TRIP, Digital input for external trigger
11: A2 -, Power supply 22: GND for RS-485 and Digital input TRIP
1: R1, Output relay channel 1 (NO) 23: B-,RS-485
3: C1, Output relay channel 1 (Common) 24: A+, RS-485
19: Prealarm, Digital output (NO) WGB: WGB transformer Connection
20: Prealarm, Digital output (Common)

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3.5.- WGB TRANSFORMERS
When the device is on, its terminals, opening covers or removing elements may ex-
pose the user to parts that are hazardous to touch. Do not use the device until it is
fully installed.
The transformer is designed for wall-mounting or DIN-rail assembly with an accessory for installa-
tion.
The WGB is a feed-thru busbar type transformer, where the conductor cables to be measured must
pass through the inner hole or window of the transformer.
3.5.1. PANEL INSTALLATION
For panel installation, 4 clamping clips, are provided with the transformer, see Figure 4.
Figure 4: Clamping clip.
The clamping clips which must be installed on the WGB as shown in Figure 5.
Figure 5: Position of the clamping clips.

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3.5.2. INSTALLATION ON A DIN RAIL
For installation on a DIN rail, a support bracket is provided with the device, see Figure 6.
Figure 6: Support bracket.
The steps to ensure proper installation are:
1.- Attach the bracket to the DIN rail. Be sure the side marked FRONT is visible. The bracket can be in-
stalled in 2 ways, depending on how the WGB is to be positioned, Figure 7.
2.- Mount the WGB on the bracket, Figure 7.
Figure 7: Installation on a DIN rail.

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Note: To remove the bracket from the DIN rail, use a screwdriver to pry it off, Figure 8.
Figure 8: To remove the bracket use a screwdriver.
3.5.3.- TRANSFORMER TERMINALS
2
1
Figure 9: WGB terminals.
Table 5: List of WGB terminals.
Device terminals
1, 2 Connection terminals to the RGU-100B
3.5.4.- TRANSFORMER LEDs
WGB transformers have 6 indicating LEDs.
Power Supply
TRIPChannel
Figure 10: WGB transformer LEDs

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RGU-100B
- Power (Blue color), indicates that the device is supplied power.
- TRIP: (Red color), indicates that a leakage current trip has occurred.
(Red blinking), indicates that a prealarm has been generated.
- Channel (Green color), indicates the channel used for the WGB.
Table 6: Channel LEDs.
LEDs Description
Channel Channel 1
3.6.- CONNECTION DIAGRAMS
3
1
Alimentación Auxiliar
Power Supply
A1
A2~ / -
~ / +
9
11
R1
WGB 19
TRIP
21 22
Transformador WGB
WGB Transformer
R1
C1
RGU-100B
CBS-400B
Alimentación / Power Supply
Figure 11: RGU-100B Connection diagram.

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3.7.- INSTALLATION CONNECTIONS
All active conductors that supply the loads or part of the installation where protection is required must
pass through the associated WGB transformers.
Connect the WGB transformer to the RGU-100B using the RJ45 cable, Figure 12.
WGB
RGU-100B
RJ45
Channel 1
Figure 12: RGU-100B - WGB connection.
Note: If a RJ45 connection cable other than the one supplied with the WGB is used, it must have a
cross-section of 4 x 2 x AWG24/7. The cable must be a maximum length of 9 metres.
Connect the output relay of the RGU-100B.
If the installation is modified and it involves new transformer, a replacement of the WGB, the RGU-
100B will detect this change and light the screens in yellow, see "5.2.- PROBLEMS OR CHANGES IN THE
INSTALLATION".
Figure 13: Change in the installation.

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RGU-100B
4. OPERATION
4.1.- LED INDICATORS
The RGU-100B device has 2 LEDs:
- CPU, white color, indicates that the device is on.
- ALARM,
Table 7: ALARM LED.
LED Description
ALARM
Red blinking:
Indicates that a prealarm has been generated.
Red ON:
Indicates that a trip has been generated.
CPU
ALARMA
ALARM
Figure 14: RGU-100B LED indicators.

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4.2.- DISPLAY
The device has a backlit LCD display that is split into two areas (Figure 15):
Data area
Unit and status areas
Figure 15: RGU-100B display areas.
The data area, which displays all the values measured by the device.
The unit and device status area, which displays the different statuses, units and device in-
formation (Table 8).
Table 8: Display icons.
Icon Description Icon Description
Alternating current Prealarm activated
Direct current The device clock has not been set up
Channel: CH1 channel 1 A trip has been generated
Programming screen
Programming menu:
Locked with a password.
Unlocked.
Internal device error, contact SAT
The device's display can change color, indicating:
Yellow color:
The installation has changed, see "5.2.- PROBLEMS OR CHANGES
IN THE INSTALLATION".
Red color:
The relay has tripped due to leakage current, see "5.4.- TRIP DIS-
PLAY SCREENS".
An Individual test has been carried out, see “5.5.- TEST SCREEN”.
An error was detected in the WGB.

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4.3.- KEYBOARD FUNCTIONS
The RGU-100B has 3 keys to browse through the different screens and program the device.
Function of the keys (Table 9):
Table 9: Function of the keys on display screens.
Key Short keystroke Long keystroke (3s)
Previous screen Performs a TEST on the channel
Next screen If tripped, the channel's relay is RESET
-Access to the direct settings, the setup menu or the event
menu, depending on the screen being displayed.
4.4.- DIGITAL OUTPUT
The device has a digital output (terminals 19 and 20 of Figure 3) that is activated when a prealarm is
generated, see "6.2.- PREALARM".
4.5.- RELAY
The RGU-100B has 1 output relay (terminals 1 and 3 of Figure 3) to carry out a trip on the channel. See
"5.6.- DIRECT SETTINGS" to configure the trip parameters.
4.6.- DIGITAL INPUT
The device has a digital input, TRIP, (terminals 21 and 22 of Figure 3) to carry out a trip.

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5. DISPLAY
When starting the device, the initial screen is displayed, showing the version of the device, Figure 16,
and after 3 seconds, the clock setup menu appears.
Figure 16: Initial Screen.
5.1.- CLOCK SETUP MENU
Each time the device is switched on, the current date and time has to be configured.
If no key is pressed for 60 seconds, the device goes to the main display screen without updating the
date and time. The display screen shows the icon , indicating that the RGU-100B clock has not
been configured.
Figure 17 shows the year setup screen.
Figure 17: Clock setup: Year.
Press key to increase the year value, and key to reduce it.
Press key to confirm the value and skip to the month configuration screen, Figure 18.
Figure 18: Clock setup: Month.
Press key to increase the month value, and key to reduce it.
Press key to confirm the value and skip to the day configuration screen, Figure 19.