INSTRUCTION MANUAL
Contents
1. the type of functioning of the TRIP relay in position 1 the relay is energized at rest FAIL SAFE in position O the relay is de energized at rest f selection of the type of functioning of the ALARM relay in position 1 the relay is energized at rest FAIL SAFE in position O the relay is de energized at rest IM208 U v1 01 pag 2 4 WIRING DIAGRAMS Example of wiring diagram with switch SUPPLY with opening coil with output relay N L1L2L3 energized fail safe off l l X L The output contacts can be used to signal the relay tripped The ALARM relay allows ouput relay ouput relay to signal the current besides AL ARED TRIP the 60 of threshold set if ALARM ON is selected test remote input signal RESET current output auto reset E L R 2 power supply Vaux connection at toroidal current transformer connection contacts output relay terminals 11 12 terminals 7 8 9 of TRIP relay ELR 2 230 to connect at measure coil the contact 7 8 is normally closed if terminals 1 2 100 125V ca terminals 13 14 FAIL SAFE OFF is selected or without terminals 2 3 220 240V ca to connect at test coil power supply terminals 1 3 380 415V ca with FAIL SAFE TRIP ON the contact will connection reset at distance or automatic be normally opened in condition of rest ELR2 115 reset terminals 1 2 100 125V ca cc terminals2. 15 16 terminals 4 5 6 of ALARM relay TRIP2 to connect at a external botton with contact the contact 4 5 is normally closed if FLR 2 24 normally open FAIL SAFE OFF is selected or without z _9 to realize the function of automatic reset to power supply ee ee short circuit the terminals with FAIL SAFE ALARM ON the contact will be normally opened in condition of rest FUNCTIONALITY When the device is installed and correctly supplied its green LED will be on and the output relays commuted if the functions FAIL SAFE ON relays normally energized are selected The eventual trip of relays can depend by an interruption of the toroid relay circuit or by a presence of earth leakage current higher than the value set The function FAIL SAFE allows the commutation of output relay besides at the normal intervention for the overcoming of the current threshold also for damage of relay or for absence of power supply When the instrument switch on the relays will commute normally energized after in the condition of trip or if the power supply is absent the relays come back de energized If the ALARM ON is set the ALARM TRIP2 output relay will commute when the current measured reach the 60 of the threshold set in this way it s possible to have a signalling of increase of the earth leakage current but not yet at the level to need the opening of the line under control If the ALARM OFF is set the two output relays will commute together in the w
3. INSTALLATION Only a qualified technician can do the installation The instrument installation must be done in total absence of voltage The instrument must be intact and it haven t damages caused of transport The power supply must be compatible with the tool range To fix the device at the panel insert the two bracket into apposite button holes in the side of the enclosure and to shut the screw The transparent cover is fixed at the upper part at joint To remove the cover it s necessary to act on the two hooks in a side of the frontal part of the instrument with a screwdriver The wire of connection between the relay and the toroidal current transformer must be twisted or shielded in presence of strong electromagnetic noises or considerable length It s better to use a cable with a section of 1 mm and a length lower than 30 meters The toroidal current transformer must be connected at the terminals 1 2 coil of measure and the terminals 3 4 coil of test for the function of test The relay trip if the connection is interrupted function of permanent control of the efficiency of the connection circuit To test the device it s possible to use the bottom of TEST that caused the intervention of relay after the delay set ELR 2 instruction manual IM208 U v1 01 pag 1 4 ELR 2 DESCRIPTION PROGRAMMING Earth leakage Relay rel differenziale di terra t sec T El a i s H FAIL SAFE Legenda 1 current tr
4. INSTRUCTION MANUAL IM208 U v1 01 E LR 2 EARTH LEAKAGE RELAY GENERALITY The device type ELR 2 is an amperometric relay of maximum homopolar differential current to use to control the insulation towards earth of networks of energy supplier of electric machines etc The device must be joined at a suitable toroidal current transformer of the CT line in the way to point out the earth cme dt leakage current of the system to control and to protect The toroidal current transformer point out the vectorial sum of the currents present on the active conductor of single phase line three phase with or without neutral inside the toroidal current transformer will pass all phase conductor and if present the neutral but none protection conductor must pass in the way to point up the leakage current towards earth depend of the insulation level line under control When the current read exceed the threshold value set the two exchanging contacts available in output will commute in the way to protect the line under control using opportune opening coils switch or contactor or to signal at distance the low insulation condition of the line or equipment under control INTRODUCTION The ELR 2 has standard dimensions DIN 96x96mm with depth very limited in the way to use it in application where the space available is limited A wide range of current and time of delay calibration allows to use it in a lot of application both like signalling of low ins
5. ay to use a contact for the opening the switch jointed and the other for a signalling at distance of tripping relay To realize the automatic reset it s necessary to short circuit the terminals 15 16 in the way that if the current measured descend under the level of the threshold set the relay will rearm automatically If after the trip the power supply disappears the relay will rearm automatically If it s impossible to rearm the relay depends by a current measured upper than the threshold or the connection between relay and toroidal current transformer is interrupted ELR 2 instruction manual IM208 U v1 01 pag 3 4 TECHNICAL FEATURES Auxiliary power supply Maximum consumption Current tripping adjustment range IAn Tripping time adjustment range t Signalling Alarm tripping External toroidal current transformer and accessories Output relay voltage free contacts Functions programmable Working temperature Storing temperature Relative humidity Insulation test Position of mounting Type of connection Protection degree Mounting DIN 43700 Standards Electromagnetic compatibility DIMENSIONS ELR 2 230 100 125V 220 240V 380 415V 50 60Hz 10 ELR 2 115 100 125V cc dc 50 60Hz 10 ELR 2 24 24 48Vcc de 50 60Hz 20 0 025 0 25A forK 0 1 0 25 2 5A forK 1 2 5 25A forK 10 0 02 0 5 sec for K 1 0 2 5sec for K 10 TR serie function alarm output function fail safe for both outputs automatic exter
6. ipping setting potentiometer 2 tripping time setting potentiometer 3 push button for test 4 push button for manual reset 5 signalling green LED for auxiliary supply presence 6 signalling yellow LED of alarm tripped 7 signalling red LED of relay tripped 8 screw terminals for the connection of the power supply and contacts of output relays 9 screw terminals for the connection at the toroidal current transformer and for the reset at distance or automatic instruction manual REAR PANEL QQOOOO 45 sn CE 005A Mane in ITALY D ELR 2M 230 ELR 2M 24 ELR 2M 115 D ELR 2 230 D ELR 2 24 ELR 2 115 V aux 1 2 115V ac 2 3 230V ac 1 3 400Vac V aux V 4 2 24Vacide 4 2 115V acide 4 3 48V acide ouput relay ouput relay Vax y Al TRIP TRIP 2 2 3 4 5 6 7 8 9 SSIS alarm on tx1 t IAx0 1 off off FAIL SAFE 10 microiswitches of programming a selection of the activation alarm function in position 1 the alarm function is disabled in position 0 the alarm function is enabled b selection of the multiplying constant of tripping time in position 1 K 10 in position 0 K 1 c d selection of the multiplying constant of tripping current with c d in position 0 K 0 1 with c in position 1 d in position 0 K 1 with c d in position 1 K 10 e selection of
7. nal reset or manual reset 2 5 kV 60 sec CEI 41 1 IEC 255 VDE0664 IEC755 CEI 64 8 EN 61008 1 1999 11 EN 62020 1999 09 EN 61543 1996 09 EN61326 1 1998 04 EN 61326 A1 1999 05 CEI EN 50081 1 CEI EN 50082 2 Contact the technical assistance or refer at specific document for applications don t described in this manual NOTE At reason of the evolution of standards and products the company reserves to modify in every time the features of the product described in this document that it s necessary to verify preventively The liability of the producer for damage caused by defect of the product can be reduced or deleted when the damage is caused joint by a defect of product or for blame of the damaged or a person of which the damaged is responsible Article 8 85 374 CEE contrell elettronica srl 26900 Lodi ITALY Via S Fereolo 9 Tel 39 0371 30207 30761 Fax 39 0371 32819 http www contrel it E mail contrel contrel it ELR 2 instruction manual IM208 U v1 01 pag 4 4
8. ulation and like protection line according with the norms CEI 64 8 to realize adequate vertical and horizontal selectivity etc The device has on input circuits of the measure circuit opportune filters doing it exempt by external noises permanent control function of efficiency of internal circuit permanent control of connection between relay and toroidal current transformer and coil continuity with test at 4 wires in the way to verify the efficiency of system relay toroidal current transformer The functioning is insured also with sinusoidal current and unidirectional button type A according to norms IEC 755 On the front it s possible to program the tripping current 25mA 25 A the tripping delay 0 02 5 sec the activation of the alarm threshold and the type of functioning of output relays The device has two contacts in exchange in output for tripping and prealarm both for the application with a closed contact and opened contact the possibility of functioning with the manual or automatic reset the connection for eventually bottom of reset at distance an apposite transparent cover of frontal protection and lateral screw terminals MODELS In basis of power supply there are three models ELR 2 230 100 125Vca 220 240Vca 380 415Vca ELR 2 24 24V calcc 48V ca cc ELR 2 110 100 125V ca cc On request are available others power supplies ACCESSORIES AND OPTION accessories transparent cover of frontal protection
Download Pdf Manuals
Related Search