Circutor RGU-10 User manual

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RG GU U – – 1 10 0 / / R RG GU U – – 1 10 0C C
E
El le ec ct tr ro on ni ic c e ea ar rt th h l le ea ak ka ag ge e p pr ro ot te ec ct ti io on n
r re el la ay y
User manual
Extended version
M 982 032 01 / 03 / 06 A
© CIRCUTOR, S.A.

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RG GU U- -1 10 0 / / R RG GU U- -1 10 0C C e el le ec ct tr ro on ni ic c e ea ar rt th h l le ea ak ka ag ge e p pr ro ot te ec ct ti io on n r re el la ay y
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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

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RG GU U- -1 10 0 / / R RG GU U- -1 10 0C C e el le ec ct tr ro on ni ic c e ea ar rt th h l le ea ak ka ag ge e p pr ro ot te ec ct ti io on n r re el la ay y
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SMALL 3 MODULE SIZE
DIN RAIL
PANEL (ADAPTER ACCESSORY)
BACKLIT
LCD DISPLAY
GREEN Normal operation
status.
RED Trip status by fault or
other event.
INSTANT CURRENT
LEAKAGE DISPLAY
PRE-ALARM
RELAY
SENSITIVITY from 50 to
80%I∆N
DELAY from 20 ms to 10
seconds
OUTPUT RELAY
CONTACT STATUS
RS-485 MODBUS
COMMUNICATIONS
SETTING OF PARAMETERS
SENSITIVITY from 30 mA to
30 A
DELAY from 20 ms to 10
seconds
ASSOCIATED
BREAKING DEVICE
CONTACTOR. Connection by
undervoltage coil
EARTH LEAKAGE DEVICE
WITH TRIP COIL
TRIP COIL
· MINIMUM Voltage
· Current EMISSION
ASSOCIATED
MEASURING DEVICE
EARTH LEAKAGE TOROID.
WG/WGS FAMILY

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GENERAL FEATURES
The RGU-10 earth leakage relay is type A programmable electronic earth leakage protection equipment with two
independent relays 4, the main output for checking the cut off device and performing the protection function and the
pre-alarm relay for installation prevention and maintenance.
Allows the setting and adjustment of all parameters required for complete protection and maintenance checking in
the installation. A series of parameters may be set directly from the keypad (buttons) and by setting menus on the
instrument itself.
Before starting the earth leakage device carefully read sections: power supply, connection diagram and setting.
The RGU-10 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/WGS family external measuring toroid.
Under normal operating conditions the main values determining earth leakage
protection in an installation are shown on the display. These include sensitivity,
delay and instant current leakage.
Bearing in mind the high degree of protection required by installations, the equipment
has a display and LED indicators for the different events which usually occur.
Data displayed or pre-alarm indication, trips, leakage readings, etc. assist in providing
sufficient information for proper maintenance.
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.
The version for RS485 communications and appropriate software allows
setting, data and information to centralised for the proper monitoring and
checking of the maintenance of electricity lines.
The measurement of earth leakage current from which the RGU-10/RGU-10C
operates by indicating the instant leakage current, pre-alarm or trip is
determined by the WG series earth leakage transformers. The inner diameter
of the transformer is defined by the installation's wiring dimensions.
EARTH LEAKAGE TRANSFORMERS, WG SERIES
Weight (g)
Useful
diameter
(mm)
Type Code

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MAIN FEATURES
 Measuring in true effective value (TRMS)
 Type A differential. IEC 61008.1
 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, IEC 38
Other features:
 3 modules. DIN rail. In a panel using front accessory, code M5ZZF1
 Displaying instant leakage values.
 Backlit LCD display.
 Built-in RS485 communications (Modbus RTU®). RGU-10C only
Available models:
RGU-10 SERIES CODE
RGU-10 P11941
RGU-10C P11944

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RG GU U- -1 10 0 / / R RG GU U- -1 10 0C C e el le ec ct tr ro on ni ic c e ea ar rt th h l le ea ak ka ag ge e p pr ro ot te ec ct ti io on n r re el la ay y
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INSTALLATION AND START-UP
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. The equipment must not be
switched on until it is finally connected to the electrical board.
IF THE EQUIPMENT IS HANDLED IN A WAY NOT SPECIFIED BY THE MANUFACTURER, THE EQUIPMENT'S
PROTECTION MAY BE COMPROMISED
When it is likely that the equipment has lost its protection (i.e. with visible damage), it must be disconnected from the
auxiliary supply. In this event, contact a qualified technical service representative.
INSTALLING THE EQUIPMENT
Check the following points before switching the equipment on:
 Power supply voltage.
 Operating conditions.
 Safety.
A. Power supply voltage:
 Standard version:
- Power supply : 230 Vac ±20%
- Frequency : 50-60 Hz
- Terminals 10-11 : A1-A2
- Burden: 6 VA
 Special Version:
- Power supply : 24...230 Vac // 400 Vac // 12...230 Vdc
- Frequency : 50-60 Hz
- Terminals 10-11 : A1-A2
B. Main/pre-alarm relay output switch contacts:
- Main output terminal contacts : 13-14-15
- NA output terminal : 13
- NC output terminal : 14
- Output common terminal : 15
- Pre-alarm output terminal contacts : 4-5-6
- NA output terminal : 6
- NC output terminal : 5
- Output common terminal : 4
- Material : AgCdO
- Rated current/Maximum instant current : 6 / 10 Aac
- Rated voltage/Maximum switching voltage : 230 Vac
- Rated load in AC : 2,500 V·A
- Contacts protected by varistor : 275 Vac
- Mechanical useful life : 10·106
- Ambient temperature range : - 40…+85 ºC
- Electrical useful life for AC loads Cut off power for DC loads

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C. External input for Trip/Rearm:
- Terminals : 1 – 2
- Type of input : Optocoupled
- Maximum voltage / Maximum power : 110 – 230 Vac ±20% / 0.7 W
D. Earth leakage current measurement circuit
Scale range Full scale Resolution display
30 mA 75 mA ±1 mA
300 mA 750 mA ±1 mA
3 A 7.5 A ±0.1 A
30 A 75 A ±1 A
E. Operating conditions:
- Operating temperature : -10 ºC / +50ºC
- Relative humidity : 5 to 95 % RH (without condensation)
- Altitude : up to 2,000 metres
F. Safety:
- Designed for category III installations, 300 Vac (EN 61010).
- Protection against electric shock by class II double insulation.
INSTALLATION AND MOUNTING
The equipment is installed on a DIN rail or on a panel (drilled panel 65+0.8 x 65+0.8 mm, according to DIN 43 700 using
accessory M5ZZF1). All connections must remain inside the electrical board.
Note that when the instrument is switched on, the terminals may be dangerous when touched and opening or
removing parts may access dangerous areas. Therefore, the equipment must not be used until it is properly
installed.
A 72x72 mm front adapter accessory is used to install the equipment on a panel. All connections must remain inside
the electrical board.
The front adapter accessory has a base, a frame two tabs and three
screws.
1. The base is mounted on top of the equipment.
2. The equipment is attached by screwing the holes in the
equipment on the upper right corner and lower left corner on the
front of equipment.
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 equipment is mounted in the hole in the panel with the
adapter.
6. The tabs run towards the panel to obtain the mounting
pressure.

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Connection diagram features
The connection for the equipment using 0.5 mm2diameter cable.
Recommended tightening torque is 0.5-0.6 Nm.
Length of cable to strip 5-7 mm.
It is recommended that meshed cable is used to connect the toroid over large distances.
Terminal list
No. Terminal description
1 Voltage input ON/OFF external L
2 Voltage input ON/OFF external N
3
4 Output common contact pre-alarm
5 NC output contact pre-alarm
6 NA output contact pre-alarm
7
8 Toroid current input 1S1
9 Toroid current input 1S2
10 Power supply voltage input A1
11 Power supply voltage input A2
12
13 NA output contact trip
14 NC output contact trip
15 Output common contact trip
Note: Terminals 3, 7 and 12 are free.

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CONNECTION DIAGRAMS
RGU-10/RGU-10C connection with current emission coil. In the event of powering the equipment before the breaking
device (AUTOMATIC SWITCH) in an earth leakage trip situation because of a fault, test or toroid error:
1. Note the cause of the trip on the red display.
2. Reset the breaking device.
3. Press the RESET equipment.
Power supply from
24 to 230 Vac
400 Vac power
supply

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RGU-10/RGU-10C connection with current emission coil. The following has to be taken into consideration in the
event of powering equipment after the breaking device.
1. The breaking device has to be a manually resettable device.
2. After dripping, the equipment is disconnected losing all information on the reasons for the trip. The system is
reset only by resetting the breaking device. It is reconnected by the power supply.
Power supply from
24 to 230 Vac
400 Vac power
supply

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RG GU U- -1 10 0 / / R RG GU U- -1 10 0C C e el le ec ct tr ro on ni ic c e ea ar rt th h l le ea ak ka ag ge e p pr ro ot te ec ct ti io on n r re el la ay y
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The equipment operates to its maximum whenever it is supplied from the installation itself before the breaking device
or from an independent auxiliary power supply. However if the power supply from the installation is below the
breaking device the system continues to be properly protected even though with limitations in terms of its
disconnection performance through lack of power supply.
Others types of power supply voltages for the equipment, independent of the installation itself:
Power supply from
24 to 120 Vdc

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RGU-10/RGU-10C connection with undervoltage coil. Power supply to the equipment is before the breaking device.
This breaking device may be an automatic switch or contactor.
Using a CONTACTOR the protection is reset by pressing RESET, or by using an AUTOMATIC SWITCH. The
breaking device must be rearmed beforehand.
Power supply from
24 to 230 Vac
400 Vac power
supply

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RG GU U- -1 10 0 / / R RG GU U- -1 10 0C C e el le ec ct tr ro on ni ic c e ea ar rt th h l le ea ak ka ag ge e p pr ro ot te ec ct ti io on n r re el la ay y
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Other equipment's power supply voltages:
Power supply from
24 to 120 Vdc

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CONNECTING THE EQUIPMENT IN POSITIVE SAFETY
This installation mode provides the most conservative protection from the point of view of personal and property
safety in electrical installations.
With this type of equipment connection and setting, persons all goods are protected against faults where the earth
leakage relay loses its protection capacity. The last order from the relay is to open the installation in the event of this
power supply problems to the equipment itself or through lack of voltage in the installation (neutral or face fault).
1. The breaking device has the power to trip using the undervoltage coil, either internally (CONTACTOR) or
externally (AUTOMATIC SWITCH).
2. The equipment is set by programming by pressing the Std/+ key in positive safety mode. The "+"symbol appears
on the display.
3. The equipment's power supply has to be the same as the installation or section it is protecting.
Positive
safety

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When this type of safety is used using the current emission coil, it can only be assured that the system will trip went
the earth leakage relay is not operating correctly.
1. The breaking device has the power to trip using the maximum current coil. (AUTOMATIC SWITCH).
2. The equipment is set by programming by pressing the Std/+ key in positive safety mode. The "+"symbol appears
on the display.
Positive
safety

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DESCRIPTION
The front of the equipment which is formed by the display, buttons and LEDs, is protected with a sealable plastic
cover which has the appropriate holes to access the RESET, TEST and SETTING keys.
Generic functions of the LEDs and front keypad:
The equipment has to light indicators or LEDs.
Green / Red dual colour LED
 Off, the equipment is not operating or is not receiving power supply voltage.
 On in green, the equipment is operating. It is receiving power supply voltage.
 On in red, the equipment has tripped.
Yellow LED. Indication of pre-alarm
 Off, there is no pre-alarm trip.
 On, constant, pre-alarm trip without reclosing.
 On, flashing, pre-alarm trip in re-closing situation.
The equipment has seven buttons described according to the degree of accessibility.
Accessible with sealed cover and tool.
RESET button
 Starts the equipment after a trip.
TEST button
 Carries out a trip to check the proper operation of the relay.
PROG/PAG button
 Dual purpose button.
 With a short press, the PRE-ALARM setting is entered.
 With a long press, the equipment's SETUP program is entered.
- DELAY SETTING
- SETUP MENU ROTATION
- SENSITIVITY SETTING
- SAFETY SETTING
- GREEN LED: Equipment on
- RED LED: Leakage trip
- YELLOW LED: Pre-alarm
- RESET BUTTON
- TEST BUTTON
- SETUP SETTING
- PRE-ALARM SETTING
- RESET PRE-ALARM
SETTING

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Accessible with cover raised. Keys with dual function. With a long press, the equipment is entered to set the values.
With a short press, the option within a series of values defined in the equipment is selected.
SENSIVITY button, I∆N
 This allows values between 30, 100, 300, 500 mA , 1 and 3 A to be selected
 This scale can be extended using the SETUP program to add 5, 10 and 30 A to the above values.
DELAY button, td
 This allows 20, 100, 200, 300, 400, 500, 750 500 ms and 1 second to be selected.
 This scale can be extended using the SETUP program to add 3, 5 and 10 seconds to the above values.
 This person also allows browsing within the SET UP MENU.
Accessible with sealed cover and tool. Flush buttons.
NORMAL OR POSITIVE SAFETY button
 This allows the output contacts' polarity to be set for both the main relay and the pre-alarm.
 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 equipment and is deactivated with the fault, the
status is NC.
ALARM RESET button
 This allows the automatic re-establishment of the pre-alarm signal to be enabled.
 In Automatic Mode (REC), if the detected leakage current is below the preset pre-alarm threshold, the relay
becomes de-activated.
 In manual mode, the equipment has to be RESET from the alarm screen in order to re-establish the pre-alarm
system.
The equipment displays and sets or these directly set parameters by direct setting or by programming the SETUP
program from the display.
Backlit display, LCD
 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 leakage current.
 If the equipment trips through any event, the screen's background changes to red and the reason for the trip is
displayed.

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OPERATION
When the equipment 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.
The display shows the delay and sensitivity settings as well as the instant leakage current reading.
While the equipment is operating, the display shows the following symbols while the equipment is being
programmed and set.
In normal operating status the display shows the following parameters associated with the earth leakage protection.
PARAMETER UNIT
Instant current leakage intensity mA / A
Preset trip delay, tdmS / S
Sensitivity of trip preset, Id = I∆NmA / A
Main relay contact status + (contact 14-15 NA) / nothing (contact 14 - 15 NC)
+ (contact 16-15 NC) / nothing (contact 16 - 15 NA)
Setting setup Setting by
communications
Trip delay
Contact polarity
Pre-alarm reclosing
Pre-alarm setting
Trip sensitivity
Instant current
leakage

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The RGU-10/ RG5-10C allow the display and setting of all required parameters to complete the earth leakage
protection adjustment with pre-alarm and communications.
PARAMETER UNIT
Preset pre-alarm trip delay mS / S
Sensitivity of pre-alarm in % I∆N%
Pre-alarm relay contact status. + (contact 6-5 NA) / nothing (contact 6 - 5 NC)
+ (contact 4-5 NC) / nothing (contact 4 - 5 NA)
Operating frequency (*) Hz
Peripheral No. (*) -
Baud rate (*) Bauds
Type of parity (*) -
(*) RGU-10C only
TROUBLESHOOTING OR REASONS FOR TRIPPING
POOR TOROID CONNECTION TRIP. After a certain time the equipment will carry out a test to detect the presence
of the sensor or associated earth leakage transformer. If it does not detect either of the above, the LCD and LED will
be red. Also the "ERRt" error message will permanently appear on the LCD. 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 ensured and a RESET made to re-establish proper working. If the transformer is detected
again, normal status is returned and the error message disappears.
PRE-ALARM TRIP. In the event of the defaults current intensity exceeding the preset pre-alarm threshold, the yellow
will come on, the green backlit LCD will show the leakage level and the pre-alarm output relay will be activated. In
automatic mode (REC) when the pre-alarm situation is removed, normal status is resumed (LED and signal relay). In
manual mode, the equipment has to be RESET to unblock the pre-alarm.
FAULT TRIP. When the equipment is tripped by a current fault, the red and yellow LED comes on and the backlit
LCD is red. For current from the last cycle which tripped the relay is displayed. To reconnect press RESET to return
to the initial status.

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REMOTE TRIP. When a trip is forced (input terminals 1-2, by applying 230 V) the equipment 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.
When it is remotely reset (input terminals 1-2, removing the 230 V) the equipment is reconnected with the display
backlit in green, LED ON in green as in normal status.
For the RGU-10C, a remote trip/reset can also be made via RS485 communications. The equipment remains
tripped showing this incidence on the display with a "REM" message in red with also the LED ON. It has to remain
permanently in this situation until the change in status no longer exists.
It is reset when the remote reset is carried out using RS485 communications, applying 230 V between the
remote 1-2 input terminals or by pressing the reset button. The equipment is reconnected with the display backlit in
green, LED ON in green as in normal status.
TRIP MESSAGES ON THE EQUIPMENT
CAUSE OF TRIP MESSAGE DISPLAY
TEST TESt
Poor toroid connection ERRt
Remote signal ON/OFF EXT
RS485 Communications REM
Current leakage Instant value
OTHER DISPLAY MESSAGES
MESSAGE
SAVE Enters setting values
EXIT Exits setting mode
OVR Current leakage reading off scale