DIN RAIL SERIES ( WRT-6
Contents
1. current fault event User s guide for self reclosing protection equipment 6 of 11 Version 1 1 Manual WRT 6 25 3 OPERATION MODE Features of the WRT 6 25 as a residual current protective device Built in measuring differential transformer inner diameter of 25 mm Sensitivity set at 30 mA or 300 mA adjustable in factory Delay time between successive reclosing actions set at 1 minute Allowable number of reclosing attempts set at 10 Period of 30 minutes to be waited before the internal counter of reclosing actions is reset to zero Features of the WRT 6 25 as a overcurrent short circuit protective device Allowable number of reclosing attempts set at 2 Delay time between successive reclosing actions set at 1 minute Period of 30 minutes to be waited before the internal counter of reclosing actions is reset to zero The electric motorized circuit breaker guarantees the effective protection against overcurrent or short circuit 10 kA DIN VDE These circuit breakers can be either single phase or three phase plus neutral The circuit breaker can be closed or open either directly over the own circuit breaker or by means of a command given by the relay After a trip due to an overload or a short circuit event the circuit breaker will automatically switch to its ON position back up to 2 attempts once passed the set delay time 1 min The circuit breaker can be manually reclosed at any time ju2. Manual WRT 6 25 RESIDUAL CURRENT AND OVERCURRENT SHORT CIRCUIT PROTECTION EQUIPMENT EQUIPPED WITH SELF RECLOSING SYSTEM DIN RAIL SERIES WRT 6 25 USER S MANUAL User s guide for self reclosing protection equipment Version 1 1 Manual WRT 6 25 USER S GUIDE FOR SELF RECLOSING PROTECTION EQUIPMENT 1 Introduction 2 Equipment description 2 1 Residual current protective system 2 2 Overcurrent and short circuit protective system 2 3 Tripping coil F3 3 Operation mode 4 General specifications 4 1 Circuit breaker of M41 series 4 2 Relay WRT 6 25 4 3 Tripping coil F3 5 Safety warnings 6 Connection diagram 7 Dimensions User s guide for self reclosing protection equipment 2 of 11 Version 1 1 Manual WRT 6 25 1 INTRODUCTION The device provides an overcurrent short circuit and residual current protection for either single or three phase with or without neutral wire power systems with self reclosing ability for a residual current and or overcurrent fault In case of a trip the electronic relay tries a reclosing action up to 10 times for a residual current fault and up to 2 times for an overcurrent fault The device guaranties the power system to be cut either due to a residual current or overcurrent fault so offering a complete protection of the electrical mains This system is specially suitable for those installations which due to their location are difficult to be controlled cooling ch
3. ambers facilities at countryside etc This protection equipment with self reclosing system for DIN rail mounting is basically formed by following elements 1 Electric motorized circuit breaker model FA with 2 or 4 poles 2 Tripping coil F3 3 Control relay WRT 6 25 The control relay of the WRT 6 25 system delivers following features and functions Counter of reclosing actions Display of instantaneous residual current Transformer for residual current detection purposes Free voltage auxiliary contact for the indication of the relay latched situation Independent signaling leds for partial trips or latches oP eh Index 1 of 13 Version 1 1 Manual WRT 6 25 2 EQUIPMENT DESCRIPTION 2 1 Residual current protective system Two types are distinguished according to the rated sensitivity of the residual current protection system e Code 550554 WRT 6 25 0 03 rated sensitivity lan 30 mA e Code 550555 WRT 6 25 0 3 rated sensitivity la n 300 mA The frontal cover incorporates three push buttons one display and diverse signaling leds Two terminals marked as E1 E2 in the lower part of the WRT 6 25 relay provides an optional indication of the locked situation of the equipment once the maximum allowable number of reclosing attempts is reached either by residual current or overcurrent short circuit fault Push buttons description Test Test to check the residual protection system out Reset Reclosin
4. ectly over the own circuit breaker or by means of a command given by the relay After a trip due to an overload or a short circuit event the circuit breaker will automatically switch to its ON position back up to 2 attempts provided the fault in the installation has disappear once passed the set delay time 1 min The circuit breaker can be manually reclosed at any time just pressing the button RESET in the relay The circuit breaker motor incorporates A yellow lever which permits the circuit breaker to be locked once it has been opened in order to avoid this could be neither mechanically or manually put to the OFF position back The circuit breaker can also be locked in the OFF position by means of a padlock 6 mm passing hole User s guide for self reclosing protection equipment 5 of 11 Version 1 1 Manual WRT 6 25 A set of auxiliary contacts to inform about the circuit breaker status A closed contact means that the circuit breaker is in the OFF position C os Gf ejam SS ees eee Pe WK SPECIFICATIONS OF M41 SERIES Rated current In A 6 10 16 20 25 32 40 50 63 URAIA o 1 2 3 4 55 C to 55 C 2 3 Tripping coil F3 Ga The tripping coil F3 is an emission type I 4 coil powered at 230 V e mo This coil enables a quick and safety trip of the circuit breaker when this receive the pertinent command from the residual current relay WRT 6 25 in case of a residual
5. ed in the OFF position to avoid not controlled reclosing actions to occur 5 2 Residual current protective relay The TEST push button permits the user to check the correct operation of both the relay and the circuit breaker The RESET push button enables Resetting to zero the internal counter of total reclosing actions Reclosing at any time the residual current and overcurrent short circuit protective system User s guide for self reclosing protection equipment 9 of 11 Version 1 1 Manual WRT 6 25 6 Connection diagram Fl A2 OO oO Oo ta Latching signal i LIN LOAD User s guide for self reclosing protection equipment 10 of 11 Version 1 1 Manual WRT 6 25 7 DIMENSIONS WRT 6 25 0 03 WRT 6 25 0 3 75 _ 105 7 i 70 i 25 Fixing DIN 46277 EN 50022 M41 2P F3 M41 3P N F3 144 rice f Oi SiGie lee User s guide for self reclosing protection equipment 11 of 11 Version 1 1
6. g of the relay and reset to zero of internal counters of reclosing actions Select Change of display values Display functions No of reclosing actions Rd led Instantaneous value of the measured residual current Cd led User s guide for self reclosing protection equipment 4 of 11 Version 1 1 Manual WRT 6 25 Description of signaling leds Sign Led description Power Power supply OFF Residual current amp or overload amp or short circuit fault Indication of the circuit breaker status Em Fixed on latched situation after 2 reclosing attempts by overload amp or short circuit trip Indication of the residual current relay status Ed Fixed on latched situation after 10 reclosing attempts by residual current trip Indication of the total number of reclosing actions 3 digit display Indication of instantaneous residual current the value keeps in display after the relay sensitivity has been exceeded Cd When ON the display shows the residual current value Rd when ON the display shows the total number of reclosing actions 2 2 Overcurrent and short circuit protective system M41 Series Range from 6 to 63 A The electric motorized circuit breaker guarantees the effective protection against overcurrent or short circuit 10 kA DIN VDE These circuit breakers can be either single phase or three phase plus neutral type The circuit breaker can be closed or open either dir
7. reclosing actions 1 minute Time period to be waited before the internal counter of reclosing actions is reset to zero once the power supply has 30 minute been restored and no other fault event occurs in the meantime Test to the residual current protective TEST Push button system To reclose the system and reset to zero RESET Push button the counter of reclosing actions Switch of the visualization mode between the number of reclosing SELECT Push button actions and the value of the residual current Operation temperature 0 to 45 C Storage temperature 15 to 60 C NO free voltage contact relay for the indication of a complete locked Auxiliary signal Terminals E1 E2 situation of the equipment either for the residual current or overcurrent short circuit reclosing system User s guide for self reclosing protection equipment 8 of 11 Version 1 1 Manual WRT 6 25 4 3 Tripping coil F3 Operation voltage 230 Vac 5 SAFETY WARNINGS 5 1 Circuit breaker M41 Repetitive switching ON OFF actions may give rise to 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 switched ON When the downstream installation is being manipulated the yellow lever of the FA circuit breaker must be continuously plac
8. st pressing the button RESET in the relay The circuit breaker motor incorporates A yellow lever which permits the circuit breaker to be locked once it has been opened in order to avoid this could be neither mechanically or manually put to the OFF position back The circuit breaker can also be locked in the OFF position by means of a padlock 6 mm passing hole A set of auxiliary contacts to inform about the circuit breaker status A closed contact means that the circuit breaker is in the OFF position short circuit overload or manual disconnection User s guide for self reclosing protection equipment 7 of 11 Version 1 1 Manual WRT 6 25 4 GENERAL SPECIFICATIONS 4 1 Circuit breaker of M41 series 230 Vac 2 wires Operation rated voltage 400 230 Vac III N Rated current In A 6 10 16 20 25 32 40 63 4 2 Relay WRT 6 25 Auxiliary voltage 230 V a c Built in differential transformer Diameter of 25 mm Residual current lan 30 or 300 mA adjustable in factory Counter of reclosing actions Visualization of the instantaneous residual current and hold in display in case of trip by residual current fault 3 digit display Allowable number of reclosing actions in case of trip by residual current fault 10 reclosing actions Allowable number of reclosing actions in case of trip by overcurrent short circuit reclosing actions fault Delay time between
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