Circutor RGU-10 B RCM User manual

INSTRUCTION MANUAL
Residual current device and monitor
RGU-10 B
RGU-10 B RCM
(M087B01-03-20A)

2
RGU-10 B, RGU-10 B RCM
Instruction Manual

3
Instruction Manual
RGU-10 B, RGU-10 B RCM
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.

4
RGU-10 B, RGU-10 B RCM
Instruction Manual
CONTENTS
SAFETY PRECAUTIONS .........................................................................................................................................................3
DISCLAIMER ..........................................................................................................................................................................3
CONTENTS.............................................................................................................................................................................4
REVISION LOG .......................................................................................................................................................................5
SYMBOLS...............................................................................................................................................................................5
1. VERIFICATIONS UPON RECEPTION..................................................................................................................................6
2. DESCRIPTION OF THE PRODUCT.....................................................................................................................................6
3. INSTALLING THE DEVICE.................................................................................................................................................8
3.1.- PRELIMINARY RECOMMENDATIONS ........................................................................................................................8
3.2.- INSTALLATION .........................................................................................................................................................9
3.2.1.- INSTALLATION OF DEVICE IN PANEL................................................................................................................9
3.3.- TERMINALS OF THE DEVICE.................................................................................................................................. 10
3.4.- CONNECTION DIAGRAMS........................................................................................................................................11
3.4.1.- RGU10 B: TRIP BY SHUNT COIL......................................................................................................................11
3.4.2.- RGU10 B: TRIP BY UNDERVOLTAGE COIL...................................................................................................... 12
3.4.3.- RGU10 B RCM................................................................................................................................................ 13
4. OPERATION ................................................................................................................................................................... 14
4.1.- GENERAL DESCRIPTION......................................................................................................................................... 14
4.2.- DESCRIPTION OF THE DEVICE ............................................................................................................................... 15
4.3.- LEDs INDICATORS.................................................................................................................................................. 15
4.4.- KEYBOARD FUNCTIONS ......................................................................................................................................... 16
4.5.- DISPLAY................................................................................................................................................................. 16
4.6.- OPERATION............................................................................................................................................................ 17
4.7.- TROUBLESHOOTING OR REASONS FOR TRIPPING................................................................................................. 19
4.7.1.- POOR TOROID CONNECTION ALARM............................................................................................................... 19
4.7.2.- PREALARM TRIP.............................................................................................................................................. 19
4.7.3.- TRIP BY LEAKAGE CURRENT .......................................................................................................................... 19
4.7.4.- REMOTE TRIP .................................................................................................................................................. 19
5. CONFIGURATION .......................................................................................................................................................... 21
5.1.- ADIRECT SETTING.................................................................................................................................................. 21
5.1.1.- SETTING THE SENSITIVITY TRIP..................................................................................................................... 21
5.1.2.- DELAY SETTING AND MAIN RELAY CURVE .................................................................................................... 21
 5.1.3.- POSITIVE SECURITY SETTING OF THE MAIN RELAY........................................................................................22
5.1.4.- SETTING THE PREALARM RELAY ...................................................................................................................22
6. TECHNICAL FEATURES..................................................................................................................................................24
7. TECHNICAL SERVICE......................................................................................................................................................26
8. WARRANTY....................................................................................................................................................................26
9. CE CERTIFICATE ............................................................................................................................................................27

5
Instruction Manual
RGU-10 B, RGU-10 B RCM
REVISION LOG
Table 1: Revision log.
Date Revision Description
11/20 M087B01-03-20A Nueva versión
Note: The images of the devices are for illustrative purposes only and might differ from the original
device.
SYMBOLS
Table 2: Symbols.
Symbol Description
In compliance with the relevant European directive.
In accordance with the CMiM directive.
In accordance with the UKCA directive (UK Conformity Assessed)
The device complies with the 2012/19/EC European directive. Do not dispose of the device in a
household waste container at the end of its useful life. Observe the local electronic device recy-
cling regulations.
Direct current.
~Alternating current.

6
RGU-10 B, RGU-10 B RCM
Instruction Manual
1. VERIFICATIONS UPON RECEPTION
The following must be checked upon reception of the device:
a) The device has been supplied according to the specifications in your order.
b) The device has not been damaged during transport.
c) Perform an external visual inspection of the device before connecting it.
d) Check that it has been supplied with the following:
- An installation guide.
Immediately contact the carrier and/or CIRCUTOR’s after-sales service if you de-
tect any problem in the device upon reception.
2. DESCRIPTION OF THE PRODUCT
RGU-10 B is a electronic type B earth leakage current protection and monitoring relay. It has 2
programmables outputs relays: main trip relay and prealarm relay. It has one free voltage input for
external TRIP/RESET.
Allows the setting and adjustment of all parameters required for complete protection and maintenance
checking in the installation.
The RGU-10 B measures, calculates and displays the earth leakage current in three-phase, balanced or
unbalanced industrial systems.
Measurements are in true effective value, via one earth leakage current input, from the WG-xx-TB and
WGC-xx-TB families external measuring toroid.
Under normal operating conditions the main values determining earth leakage protection in an instal-
lation are shown on the display. These include sensitivity, delay and instant current leakage.
Under normal operating conditions the backlit display is green. However, after any event causing a
main relay to trip, the backlight is red, indicating the reason.

7
Instruction Manual
RGU-10 B, RGU-10 B RCM
There are 2 models of the device:
RGU-10 B, protective device (IEC 60947-2 M).
RGU-10 B RCM monitoring device (IEC 62020).
Main features:
- Measuring in true effective value (TRMS)
- Type B differential (IEC 60947-2 Annexed M)
- Insulation against transients (IEC 61008.1)
- High frequency filtering (IEC 61008.1)
- Trip setting between 80 and 100% I∆n
- Inverse curve (IEC 61008.1)
- Associated standard: IEC 61008.1, IEC755, IEC 60947-2 M
- 3 modules. DIN rail. In a panel using front accessory
- Displaying instant leakage values.
- Backlit LCD display.

8
RGU-10 B, RGU-10 B RCM
Instruction Manual
3. INSTALLING THE DEVICE
3.1.- PRELIMINARY RECOMMENDATIONS
The operators using and handling the device must follow the safety measures estab-
lished in the country where the device will be used to guarantee its safe operation,
using personal protective equipment if needed.
The RGU-10 B device must be installed by authorised and qualified staff.
Disconnect the device from the mains and disconnect the measuring devices before handling, chang-
ing the connections of or replacing the device. Handling the device while it is connected is hazardous
to people nearby.
The cables must be in perfect working order to prevent accidents or injuries to people and/or damage
to the facilities/installations.
Limit the operation of the device to measuring the specified current or voltage values.
The manufacturer of the device shall not be held responsible for any damage resulting from the user
or installation company failing to observe the warnings and/or recommendations indicated in this
manual nor for any damage resulting from the use of non-original products or accessories or those
from other brands.
Do not use the device to take measurements if you detect an anomaly or malfunction.
Check the environment in which the device is installed before taking a measurement. Do not use the
device to take measurements in dangerous, explosive, wet or damp environments.
Disconnect the device from the mains and from the power supply (both the device and
its measuring system) before performing any maintenance work, repairs or handling
any of the connections of the device.
Contact the after-sales service if you detect that the device is not working properly.

9
Instruction Manual
RGU-10 B, RGU-10 B RCM
3.2.- INSTALLATION
While the device is connected, the terminals, opening the cover or removing ele-
ments can expose parts that are hazardous to the touch. The device must not be
used until the installation process is complete.
The device is installed on a DIN rail or on a panel (drilled panel 67+1 x 67+1mm, according to DIN 43 700
using accessory). All connections must remain inside the electrical board.
It has an LED indicator that indicates the presence of voltage. Even if this LED is not
on, the user must still verify that the unit is disconnected from all power supplies.
Through the core balance transformer must pass all live conductors supplyng electrical energy to loads
or part of the installation which requires it to earth leakage protection with this device. In single-phase
installation (phase and neutral, L and N), three phase - 3 wires (three phases, L1, L2 and L3) or three
phases - 4 wires (L1, L2, L3 and N).
The device must be connected to a power supply circuit protected by fuses in line with the range and
power consumption. In turn, the supply circuit must be provided with a circuit breaker or equivalent
device to disconnect the device from the mains.
3.2.1.- INSTALLATION OF DEVICE IN PANEL
A 72x72 mm front adapter accessory is used to install the device on a panel. All connections must re-
main inside the electrical board.
The front adapter accessory has a base, a frame two tabs and three screws, Figure 1.
Figure 1:Adapter accessory.
The steps to follow to perform the installation of the adapter accessory are:
1.- The base is mounted on top of the device.
2.- The device is attached by screwing the holes in the device on the upper right corner and lower left
corner on the front of device.

10
RGU-10 B, RGU-10 B RCM
Instruction Manual
3.- The front frame is attached to cover the mounting points.
4.- Three green pressure tabs on the side runners of the base are attached.
5.- The device is mounted in the hole in the panel with the adapter.
6.- The tabs run towards the panel to obtain the mounting pressure.
Figure 2: Installation of adapter accessory.
3.3.- TERMINALS OF THE DEVICE
Table 3:Terminal description RGU-10 B.
Terminals of the device
1: External input trip - Reclose 9: Transformer input 1S2
2: External input trip - Reclose 10: Power supply
4: Prealarm relay (Common) 11: Power supply
5: Prealarm relay (NC) 13: Tripping relay (NO)
6: Prealarm relay (NO) 14: Tripping relay (NC)
8: Transformer input 1S1 15: Tripping relay (Common)
8 9
1 2 4 5 6
10
11
13 14 15
Reset
Test
B
Figure 3:Terminals RGU-10 B.

11
Instruction Manual
RGU-10 B, RGU-10 B RCM
3.4.- CONNECTION DIAGRAMS
Note: It is recommended that meshed cable is used to connect the toroid over large distances.
3.4.1.- RGU10 B: TRIP BY SHUNT COIL
NL1 L2 L3
CARGA
S1
S2
LOAD
TypeWGC
S1S2
ON / OFF externo
External ON/OFF
8 9
1 2 4 5 6
10
11
13 14 15
Reset
Test
B
Disparo por BOBINA DE EMISIÓN
(Rearme manual)
Trip by SHUNT COIL
(Manual reclose)
Figure 4: RGU-10 B: Trip by shunt coil.

12
RGU-10 B, RGU-10 B RCM
Instruction Manual
3.4.2.- RGU10 B: TRIP BY UNDERVOLTAGE COIL
NL1 L2 L3
CARGA
S1
S2
LOAD
TypeWGC
S1S2
ON / OFF externo
External ON/OFF
8 9
1 2 4 5 6
10
11
13 14 15
Reset
Test
B
Disparo por BOBINA DE MÍNIMA
(Rearme manual)
Trip by UNDERVOLTAGE COIL
(Manual reclose)
Figure 5: RGU-10 B: Trip by undervoltage coil.

13
Instruction Manual
RGU-10 B, RGU-10 B RCM
3.4.3.- RGU10 B RCM
NL1 L2 L3
CARGA
S1
S2
LOAD
TypeWGC
S1S2
ON / OFF externo
External ON/OFF
Aux. Supply
230 V a.c.
8 9
1 2 4 5 6
10
11
13 14 15
Reset
Test
B
Figure 6: RGU-10 B RCM.

14
RGU-10 B, RGU-10 B RCM
Instruction Manual
4. OPERATION
4.1.- GENERAL DESCRIPTION
RGU-10B
Instant current
leakage Display
Backlit LCD
display
Small size
3 módule
DIN rail
Panel (Adapter accessory)
Prealarm
relay
Programming of
parameters
ASSOCIATED
BREAKING DEVICE
Contactor,
connection by
undervoltage coil Earth leakage device
with trip coil
ASSOCIATED
MEASURING DEVICE
WG-xx-TB and
WGC-xx-TB toroidal
family
Figure 7: General description.

15
Instruction Manual
RGU-10 B, RGU-10 B RCM
4.2.- DESCRIPTION OF THE DEVICE
The front of the equipment which is formed by the display, buttons and LEDs, is protected with a seal-
able plastic cover which has the appropriate holes to access the RESET, TEST and PROG/PAG keys.
ON LED
Prealarm LED
RESET key
SENSITIVITY key
TEST key
PROG / PAG key
RESET PREALARM key
SAFETY key
DELAY key
Figure 8: Description LEDs and button.
4.3.- LEDs INDICATORS
The device has 2 indicators LEDs, Figure 8.
Table 4: LEDs description: ON LED.
ON LED
State Description
Off The device is not operating or is not receiving power supply voltage.
Green The device is operating. It is receiving power supply voltage.
Red The device has tripped.
Table 5: LEDs description: PREALARM LED.
PREALARM LED
State Description
Off There is no pre-alarm trip.
On Pre-alarm trip without reclosing.
On
flashing Pre-alarm trip in reclosing situation.

16
RGU-10 B, RGU-10 B RCM
Instruction Manual
4.4.- KEYBOARD FUNCTIONS
The device has 7 keys, Figure 8.
1.- Keys accessible with sealed cover and tool
RESET, Starts the device after a trip.
TEST, Carries out a trip to check the proper operation of the relay.
PROG/PAG, Access to prealarm programming.
2.- Access to prealarm programming
Keys with dual function. With a long press, the device is entered to set the values. With a short press,
the option within a series of values defined in the device is selected.
SENSITIVITY (Id), It allows to choose between the values of 100, 300, 500 mA , 1 and 3 A
DELAY (td), It allows to choose between the values of 100, 200, 300, 400, 500, 750 ms and
1 s.
3.- Keys accessible with sealed cover and tool
Flush buttons.
SAFETY (Std/+), This allows the output contacts polarity to be set for both the main relay
and the prealarm.
●With normal safety (Std) the relay is activated with a fault, the status is NO.
●With positive safety (+) the relay is activated on supplying the device and is deactivated with
the fault, the status is NC.
RESET PREALARM (AUTO),This allows the automatic re-establishment of the prealarm signal
to be enabled.
●In Automatic Mode (REC), if the detected leakage current is below the preset prealarm thresh-
old, the relay becomes de-activated.
●In manual mode, the device has to be RESET from the alarm screen in order to re-establish
the prealarm system.
4.5.- DISPLAY
The device has a backlit display with green or red light, depending on the state of the device.
The background to the screen in normal mode is green. The parameters required for earth leakage
protection, sensitivity and delay in its associated units are displayed. It also displays the current leak-
age current.

17
Instruction Manual
RGU-10 B, RGU-10 B RCM
If the device trips through any event, the screen’s background changes to red and the reason for the
trip is displayed.
Figure 9: Display RGU-10B.
Display messages by device trip, Table 6.
Table 6: Display messages by device trip.
Message Cause of trip
TESt Test
EXT Remote signalON/OFF
ALAR Trip of a leakage current
Other display messages, Table 7.
Table 7: Other display messages.
Message Description
SAVE Validate configuration values
EXIT Exits programming mode
ERRt Poor toroid connection
OVR Current leakage reading off scale
4.6.- OPERATION
When the device is powered at its rated voltage, the green LED ON the front is on, the backlit LCD is
green indicating the software and hardware version. After a short while, the version disappears and
the default display values appear on the display.
Figure 10:Initial screens.
The display shows the delay and sensitivity settings as well as the instant leakage current reading.
While the device is operating, the display shows the following symbols while the device is being pro-
grammed and set, Figure 11.

18
RGU-10 B, RGU-10 B RCM
Instruction Manual
Trip sensitivity
Instant current
leakage
Prealarm
conguration
Prealarm reclosing
Contact
polarity
Trip delay
Figure 11: Descripción display.
In normal operating status the display shows the following parameters associated with the earth leak-
age protection, Table 8.
Table 8: Parameters visible by display.
Parameter Units
Instant current leakage mA/A
Programmed trip delay, td ms/s
Programmed sensitivity of trip, Id = I∆NmA/A
Contact status: Tripping relay + (contact 13-15 NO)/nothing (contact 13 - 15 NC)
+ (contact 14-15 NC)/nothing (contact 16 - 15 NO)
The RGU-10B allow the display and setting of all required parameters to complete the earth leakage
protection adjustment with prealarm, Table 9.
Table 9: Adjustment parameters.
Parameter Units
Programmed prealarm trip delay ms/s
Sensitivity of pre-alarm in % I∆N%
Contact status: Prealarm relay + (contact 4-6 NO)/nothing (contact 4 - 6 NC)
+ (contact 4-5 NC)/nothing (contact 4 - 5 NO)
Operating frequency Hz

19
Instruction Manual
RGU-10 B, RGU-10 B RCM
4.7.- TROUBLESHOOTING OR REASONS FOR TRIPPING
4.7.1.- POOR TOROID CONNECTION ALARM
After a certain time the device will carry out a test to detect the presence of the sensor or associated
earth leakage transformer.
Also the “ERRt” error message will permanently appear on the RGU-10 B display.
A short-circuit in the transformer secondary will also be detected as an error.
When this error is detected, the correct connection with the earth leakage transformer has to be en-
sured and a RESET made to re-establish proper working. If the transformer is detected again, normal
status is returned and the error message disappears.
Figure 12: Alarm by poor toroid connection.
4.7.2.- PREALARM TRIP
In the event of the defaults current exceeding the programmed prealarm threshold, the yellow LED
will come on, the green backlit LCD will show the leakage level and the prealarm output relay will be
activated.
In automatic mode (REC) when the prealarm situation is removed, normal status is resumed (LED and
signal relay).
In manual mode, the device has to be RESET to unblock the prealarm.
4.7.3.- TRIP BY LEAKAGE CURRENT
When the leakage current exceeds the value programmed in the trip relay, the red and yellow LEDs
remain on and the LCD backlit in red with the message ALARM. To reconnect press RESET to return to
the initial status.
4.7.4.- REMOTE TRIP
When a trip is forced (input terminals 1-2, by applying 230 Vac) the device is tripped and disabled and
an “EXT” message is shown on the display in red and also the LED is on. It has to remain permanently
in this situation until the change in status no longer exists. It is not possible to manually reset or reset
using communications.

20
RGU-10 B, RGU-10 B RCM
Instruction Manual
Figure 13: Remote trip.
When it is remotely reset (input terminals 1-2, removing the 230 Vac) the device is reconnected with
the display backlit in green, LED ON in green as in normal status.