WRRT-3 SERIES USER`S MANUAL
Contents
1. 9 2 Overcurrent circuit breaker In case of failure the circuit breaker can be easily replaced This must be disconnected from the power system and removed from the DIN EN 50 022 rail Precautions to consider are Repetitive connection disconnection actions may provoke a high heating level and even a damage of the remote control system After all reclosing attempts are completed the fault in the installation must be solved before the circuit breaker is again manually connected 9 3 Earth leakage protection relay The RRT 3 relay is similar for all types regardless those are single or three phase models and their rated currents All necessary elements to perform control and setting actions over the El 3 are placed at its own front plate The TEST push button permits the user to check the correct operation of both the relay and the circuit breaker EI RESET push button permits the user To reset to zero the RRT 3 internal counter of total reclosing actions To reclose at any time the overcurrent earth leakage protection system 9 4 Safety warnings A The user should take into account all installation instructions referred in this manual as well as the equipment main features Note that with the instrument powered on the terminals could be dangerous to touching and cover opening or elements removal actions may allow accessing dangerous parts The equipment is factory shipped in proper operation co2. m CIRCUTOR DIFFERENTIAL AND OVERCURRENT PROTECTION SYSTEM WITH SELF RECLOSING FEATURE WRRT 3 SERIES USER S MANUAL M 981 207 99 B CIRCUTOR S A WRRT RRT3 SERIES Page 1 Differential and overcurrent protection system with SELF RECLOSING feature Page 1 Introduction 2 1 1 Connection warnings EUM 2 WRRT 3 Series models 2 Descriptio RT 3 4 Earth leakage protection systems 5 5 Overcurrent protection systems from 6 to 63 A 8 6 Connection terminals for check and control actions 11 7 WRRT 3 Main features 12 8 Power circuit connection procedure 13 9 Operation mode and maintenance 13 9 1 Circuit elements 22 2 13 9 2 Overcurrent circuit 14 9 3 Earth leakage protection relay 14 9 4 Safety warnings 2 14 10 WRRT 3 connection drawings 15 WRRT RRT3 SERIES Page 2 1 INTRODUCTION The WRRT 3 series provides an overcurrent and earth leakage protection for either single or three phase mains with or without the neutral wire with self reclosing ability for an earth leakage and or overcurrent event In case of a trip the equipment tr
3. open in order to avoid this could be neither mechanically or manually manipulated The circuit breaker can also be locked at the open position with a padlock 6 mm 2 passing hole The assembly system of the FA21 T into the WRRT 3 set is done on a DIN 50 022 53 mm width rail The FA21 T circuit breaker provides a set of auxiliary contacts to inform about its status terminals 3 4 in the WRRT 3 a closed contact means the circuit breaker is open short circuit or overload event or manual disconnection WRRT RRT3 SERIES Page 10 FA21 T Main features Rated currents In A 6 10 16 20 25 32 40 50 63 Rated voltage Un 240 V 415V a c Rated breaking capacit 10 000 A DIN VDE 0641 6 78 No of poles 1 2 3 4 Characteristic a Type U as per DIN VDE 0660 part 101 09 82 Magnetic trip between 6 amp 9 In t lt 0 1s b D DIN VDE 0641 EN60898 Magnetic trip between 5 amp 10 In lt 0 15 Frequency 50 60 2 Protection class IP 40 DIN 40050 Storage temperature 55 C to 65 C Operation temperature 25 C to 55 C Case colour RAL 7035 FA21 T tripping characteristic 50 60 Hz current amp 20 C time f 121418 2 25 3354 5 6 1012 13 18 x Hated current WRRT RRT3 SERIES Page 11 6 CONNECTION TERMINALS FOR CHECK AND CONTROL ACTIONS The WRRTS is equipped with a connection terminal placed at the right
4. top to perform following functions a system is provided with a circuit to measure the earth leakage current this output provides a voltage signal with a 1mV mA ratio A C This signal can be either directly measured over the own connection terminals terminals 1 2 or remotely trough a measuring network This signal is not related with the voltage supply and so can be even measured when the relay is not powered b Besides two free voltage contacts are available in the WRAT 3 to inform about the status of the equipment terminals 3 4 Trip indicating signal Free voltage normally open contact terminals 5 6 Latch indicating signal This indicates that the equipment is latched as the fault persists after all reclosing attempts Free voltage normally open contact Contact characteristics Rated voltage 250 V a c Rated current In 2 A cos 0 5 ind OUTPUT SIGNALS 1 6 WRRT RRT3 SERIES Page 12 7 WRRT 3 MAIN FEATURES Operation voltage 220 V a c 2 wires 880 220 V a c Rated currents A a c 6 10 16 20 25 32 40 63 Earth leakage residual current 30 300 mA User selectable Ifn indication by led at frontal side earth leakage failure event overcurrent failure event Delay time between successive 1 1 5 min User selectable through reclosing attempts the push button Td Tdl or Tdh Time period to be waited before 30 60 min User select
5. able through the the internal counter of reclosing push button Tc Tcl or Tch actions is reset to zero once the power supply has been restored and no other fault event occurs TEST push button To test the earth leakage protection system reclosing actions transformer relay circuit breaker Connection terminals For signaling actions measurement of earth leakage current and checking of circuit breaker status zd C Storage temperature 15 to 60 Dimensions 166 x 246 x 138 mm w x h x d WRRT RRT3 SERIES Page 13 8 POWER CIRCUIT CONNECTION PROCEDURE Cable entrance to the WRRT 3 power circuit is at the top of the case The cable exit is done through the bottom of the case Before any adjustment replacement maintenance or repairing operation is carried out the instrument must be disconnected from any power supply source 9 OPERATION MODE AND MAINTENANCE Any maintenance or repairing action can be performed by not specialized operators must thanks to friendly use design 9 1 Circuit elements Electrical motorized automatic circuit breaker FA21 T model Earth leakage protection relay with self reclosing feature RRT3 Differential transformer WKE RRT3 Connection terminal Sensitivity selector 30 300 mA Enclosure for WRRT 3 set All elements can suffer either mechanic ageing or an electric damage and have been designed for an easy replacement WRRT RRT3 SERIES Page 14
6. ay with self reclosing feature RRT3 e Indication of number of total reclosing actions Rd no resent to zero as per ER i3 009 specification e Visualization of earth leakage current in mA Cd 2 Electrical motorized overcurrent circuit breaker from 6 to 63 A 3 Sensitivity selector 30 or 300 mA placed inside the case at the upper right corner 4 Connection terminal for check and control actions Power OFF Ed O O osa WRRT RRT3 SERIES Page 4 Dimensions 166 gt j 135 7 9 Z8EL WRRT RRT3 SERIES Page 5 4 EARTH LEAKAGE PROTECTION SYSTEM The earth leakage protection system consists of a Measuring differential transformer type WKE that sends the signal to the electronic relay b Electronic earth leakage protection relay with self reclosing feature type RRT3 Allowable setting actions are Tripping earth leakage current Ifn 0 03 or 0 3 A Selection of the tripping earth leakage current 30 300 mA is done by means of a switch placed inside the case between two successive reclosing attempts Time delay Time period to be waited before the internal counter of reclosing actions is reset to zero once the power supply has been restored and no other earth leaka
7. dication Led description _ Earth leakage amp or overload amp or short circuit fault amp or overload amp or short circuit fault Em MEE UO of lock due to overload amp or short circuit fault 2 attempts Ed Indication of lock due to earth leakage fault 10 attempts Td of low waiting time between successive reclosing attempts 1 Th Td Indication of long waiting time between successive reclosing attempts 1 5 min D Indication of low waiting time to reset to zero internal counters of reclosing actions 30 min Th Tc Indication of long waiting time to reset to zero internal counters of reclosing actions 60 min 0 03 Indication of the earth leakage protection relay sensitivity setting In 30 mA 0 3 Indication of the earth leakage protection relay sensitivity setting In 300 mA 11 Cd Indication of visualization on display of the earth leakage current in mA 12 Indication of visualization on display of the total number of reclosing actions Power OFF Em Ed TI Th TI Th 0 03 A RRT3 Rd WRRT RRT3 SERIES Page 8 5 OVERCURRENT PROTECTION SYSTEMS FROM 6 63A D 28 08 9604 i 196 o6 Umax 250 Imax 2 0 5 A 95 05 a Functional elements D Terminal for control wiring 2 Manual switch Position Motor d
8. ge or overcurrent fault occurs Time clear 30 or 60 min user selectable The RRT 3 relay is similar for all types regardless those are single or three phase models and their rated currents NOTE All above times can only be modified provided no trip has occurred RRT 3 relay mains elements A 3 digits LED DISPLAY This display placed at the front of the RRT 3 relay permits the user to visualize these parameters e Number of total reclosing actions Rd no reset to zero as ER i3 009 specification Earth leakage current in mA WRRT RRT3 SERIES Page 6 B PUSH BUTTONS 5 push buttons All previous setting actions are carried out through the 5 available push buttons in the RRT 3 No Push button description n Test to check the earth leakage protection system out Reclosing of the WRRT 3 and reset to zero of RRT 3 internal counters of total reclosing actions Choice of delay time between successive reclosing actions Choice of waiting time to reset to zero the internal counters of total reclosing actions TI amp Th Choice of display mode e Indication of total reclosing actions Rd e Visualization of earth leakage current in mA Cd Power OFF Q 003A O WRRT RRT3 SERIES Page 7 C LIGHTING INDICATIONS 12 Leds The RRT 3 is equipped with several lighting indicators and push buttons to perform control and check actions over the installation No In
9. ies a reclosing action up to 10 times for an earth leakage fault event up to 2 times whether the overcurrent protection has tripped out The WRRT 3 guaranties the supply mains to be cut either due to an earth leakage or overcurrent fault so offering a complete protection over the electrical mains This system is specially suitable for those installations that due to their location are difficult to be controlled cooler chambers facilities at countryside etc 1 1 Connection warnings The manual you hold in your hands contains information and warnings about the WRRT 3 that the user should respect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions 2 WRRT 3 SERIES MODELS Standard available models are following listed ones Single phase equip Three phase equip Current Type Type In A WRHRT 3 06A WRRT 3 IV 06A WRHRT 3 1 10A WRRT 3 IV 10A 10 WRHRT 3 1 16A WRRT 3 IV 16A 16 WRRT 3 11 20A 20 WRRT 3 Il 25A 25 WRRT 3 Il 32A 32 WRRT 3 40A 40 WRRT 3 Il 50A 50 WRRT 3 Il 63A 63 Operation voltage 220 V a c 2 wires or 380 V a c 220 V III N On request Other rated currents Other power supply voltages WRRT RRT3 SERIES Page 3 3 DESCRIPTION 3 is basically formed by following elements 1 Earth leakage protection system Differential transformer WKE RRT3 Earth leakage protection rel
10. nditions WRRT RRT3 SERIES Page 15 10 WRRT 3 CONNECTION DRAWINGS IN J1 Tn A K J2 BOR 08 E 1 Measuring J9 J8 J11 J1 701 Pod IN i Common D y i gt test E EAE LI Lol C ocking L 7 7 D
11. rive ready for operation Position 0 Motor drive switched off mcb switchecd off and mechanically inhibited Hole for padlock Locking possible in O and Display of supplementary switch functions H auxiliary switches S fault signalling switches Terminals for supplementary switches b Installation Snap onto support rail DIN EN 50022 05 78 35 mm wide C FA21 electrical connection a Terminals for motor drive control wiring and mcb output terminal b Terminals for auxiliary and fault signalling switches and mcb input terminal WRRT RRT3 SERIES Page 9 The electrical motorized automatic circuit breaker FA21 T model provides the overcurrent or thermal protection of the facility 10 DIN VDE The FA21 T can be either for single phase or three phase plus neutral operation mode The automatic circuit breaker can be closed or open either directly in the own circuit breaker or by means of a command given by the RRT 3 relay After a trip due to an overload or a short circuit event the circuit breaker will automatically try to restore to its closing position up to 2 attempts whether the fault in the installation has disappear once passed the set time 1 or 1 5 min The circuit breaker can be reclosed at any time just pressing the button RESET in the RRT 3 relay The FA21 T circuit breaker incorporates a device yellow stick that permits the circuit breaker to be locked once it has been
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