CIRCUTOR RGU2 User Manual

Earth leakage relay

RGU-2

INSTRUCTION MANUAL

(M98251301-03-13B)

RGU-2 Earth Leakage Relay

Instruction Manual

RGU-2 Earth Leakage Relay

SAFETY PRECAUTIONS

Follow the warnings described in this manual with the symbols shown below.

DANGER

Warns of a risk, which could result in personal injury or material damage.

ATTENTION

Indicates that special attention should be paid to a speci c point.

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  re.

Read the manual carefully prior to connecting the unit. Follow all installation and maintenance instructions 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 noti cation.

DISCLAIMER

CIRCUTOR, SA reserves the right to make modi cations to the device or the unit speci ca-

tions 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

speci cations and the most updated manuals.

www.circutor.com

Instruction Manual

RGU-2 Earth Leakage Relay

SAFETY PRECAUTIONS ��3 DISCLAIMER �� 3 CONTENTS �� 4 REVISION LOG �� 5 1�- VERIFICATION UPON RECEPTION �� 6 2�- PRODUCT DESCRIPTION �� 6 3�- UNIT INSTALLATION �� 7

3�1�- PRIOR RECOMMENDATIONS �� 7 3�2�- INSTALLATION �� 8 3�3�- UNIT TERMINALS �� 8 3�4�- CONNECTION DIAGRAM �� 9

3�4�1� AS A PROTECTION ELEMENT (MRCD) �� 9 3�4�2� AS A MONITOR (RCM) �� 10

4�- START-UP �� 10

4�1�- DEFAULT CONFIGURATION �� 10 4�2�- BASIC SETUP �� 11 5�- OPERATION �� 11 5�1�- KEYBOARD FUNCTIONS �� 12

5�2�- DISPLAY �� 12

5�3�- LED INDICATORS ��14

5�4�- INPUTS �� 14

5�5�- OUTPUTS �� 15

5�5�1� TRIP RELAY, TRIP �� 15 5�5�2� AUXILIARY RELAY, AUX�� 15

5�6�- PROGRAMMING �� 16

5�6�1 TRIP CURRENT IΔn and TRIP DELAY TIME td ��16

5�6�2 PROGRAMMING THE AUXILIARY RELAY, AUX �� 17

5�6�3 FREQUENCY AND STATUS OF THE OUTPUT RELAY CONTACTS �� 18 5�6�4 LOCKING THE KEYBOARD �� 19

5�7�- TRIP EVENTS ��20 5�7�1� EARTH LEAKAGE CURRENT INTENSITY TRIP �� 20

5�7�2� LOCAL / EXTERNAL TEST TRIP�� 21 5�7�3� UNDERVOLTAGE / POSITIVE SAFETY PROTECTION TRIP �� 21 5�7�4� INPUT SENSOR ERROR TRIP �� 21

5�8�- RECLOSING SYSTEM �� 22

5�8�1� “MANUAL” RECLOSING SYSTEM WITH THE RESET KEY �� 22 5�8�2� RECLOSING SYSTEM WITH THE EXTERNAL TEST/RESET INPUT �� 22

6�- TECHNICAL FEATURES �� 23

6�1�- DIMENSIONS �� 24 7�- MAINTENANCE AND TECHNICAL SERVICE �� 25 8�- WARRANTY �� 25 9�- CE CERTIFICATE �� 26 APPENDIX A: TRIP CURVES �� 27

Instruction Manual

RGU-2 Earth Leakage Relay

REVISION LOG

Table 1: Revision log�

Date Revision Description

10/13 M98251301-03-13A Initial Version

11/13 M98251301-03-13B Modied Figure 1

Instruction Manual

RGU-2 Earth Leakage Relay

1�- VERIFICATION UPON RECEPTION

Check the following points when you receive the unit:

a) The unit meets the specications described in your order.

b) The unit has not suffered any damage during transport. c) Perform an external visual inspection of the unit prior to switching it on. d) Check that it has been delivered with the following:

- a seal to lock the programming button.

- installation guide.

If any problem is noticed upon reception, immediately contact the transport company and/or CIRCUTOR's after-sales service.

2�- PRODUCT DESCRIPTION

RGU-2 is a protection and/or measurement relay (MRCD/RCM). It is a smart earth leakage

protection system composed of the following elements:

- A detecting element or sensor,

- A relay,

- A circuit breaker,

The unit is fully programmable. It is supplied with the following:

- 3 Keys, used to TEST/RESET and program the unit.

- 2 operation LEDs that display the unit's status.

- LCD Display that displays messages and operation values.

- An LED Bar that displays qualitative level of leakage information.

- Plug-in terminal strips.

The unit is characterised by its reduced dimensions (2 modules mounted on a DIN rail).

It has been designed for single-phase, three-phase or three-phase with neutral low voltage electrical installations. It is suitable for all neutral rates (VT, TN, IT), either as the main protection element (MRCD) or for complementary purposes (RCM). In the case of VT/TN-S systems, it can be used as a MRCD (IEC 60947-2) or a RCM (IEC

62020). It can only be installed as an RCM in other systems.

Instruction Manual

RGU-2 Earth Leakage Relay

3�- UNIT INSTALLATION

3.1.- PRIOR RECOMMENDATIONS

In order to use the unit safely, it is critical that individuals who handle it follow the safety measures set out in the standards of the country where it is being used, use the personal protection unit necessary, and pay attention to the various warnings indicated in this instruction manual.

The RGU-2 unit must be installed by authorised and qualied staff.

The power supply plug must be disconnected and measuring systems switched off before handling, altering the connections or replacing the unit. It is dangerous to handle the unit while it is powered.

Also, it is critical to keep the cables in perfect condition in order to avoid accidents, personal injury and damage to installations.

The manufacturer of the unit is not responsible for any damages resulting from failure by the user or installer to heed the warnings and/or recommendations set out in this manual, nor for damages resulting from the use of non-original products or accessories or those made by other manufacturers.

In the event an anomaly or malfunction is detected in the unit, refrain from using it to make any measurements.

Inspect the work area before making any measurements. Do not take measurements in dangerous areas or where there is a risk of explosion.

Disconnect the unit from the power supply (unit and measuring system power supply) before maintaining, repairing or handling the unit's connections. Please contact the after-sales service if you suspect that there is an operational fault in the unit.

Instruction Manual

RGU-2 Earth Leakage Relay

3.2.- INSTALLATION

The unit is installed on a DIN rail.

All active conductors that supply the loads or the part of the installation where the earth leakage protection with this unit is required must pass through the sensor associated with the unit.

The unit must be mounted inside an electric panel.

Likewise, it must be connected to a fuse-protected power circuit, in accordance with its power

supply range and consumption. In turn, the power circuit must be tted with a circuit breaker

switch or an equivalent device, in order to be able to disconnect the unit from the power supply mains.

Note: The connection diagram suggests a cable section of 1- 1.5 mm. Recommended torque 0.5-0.6 Nm.

Terminals, opening covers or removing elements can expose parts that are hazardous to the touch while the unit is powered

3.3.- UNIT TERMINALS

Table 2: Unit terminals�

Unit terminals

1, 2 : External current sensor input. 8: External Test/Reset input with button.

3, 6, 10, 12: Not used 9, 11: Auxiliary Power Supply

4: Prealarm/Fault relay output: NO Contact 13: Trip relay output: NO Contact

5: Prealarm/Fault relay output: COM Contact 14: Trip relay output: NC Contact

7: External Test/Reset input with button. 15: Trip relay output: COM Contact

Figure 1:Unit terminals�

Instruction Manual

RGU-2 Earth Leakage Relay

3.4.- CONNECTION DIAGRAM

3�4�1� AS A PROTECTION ELEMENT (MRCD)

A�- SHUNT COIL TRIP (Manual reclosing system with RESET)

Figure 2: Connection diagram of the unit as a protection element: shunt coil trip�

B�- UNDERVOLTAGE COIL TRIP (Manual reclosing system with RESET)

Figure 3:Connection diagram of the unit as a protection element: undervoltage coil trip�

Instruction Manual

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