Electronic circuit breaker EBU Description The electronic circuit protector type EBU (Electronic Breaker Unit) provides selective overcurrent protection in AC 230 V UPS systems. It consists of an MCB approved for short circuit interruptions up to 10 kA and of an add-on electronic circuitry, taking over measuring and evaluation tasks. The product is available with the typical MCB ratings 4 A, 6 A, 10 A and 16 A with B and C characteristics and is directly operated at the output of the corresponding UPS. UPS units often do not supply sufficient power in the event of a short circuit to trip standard MCBs. The electronic AC circuit breaker can individually be adjusted to the UPS unit and will therefore reliably trip in the event of a short circuit. Optimal adjustment of the load’s current rating allows detection and disconnection of an overload in the load circuit. This helps exclude the fatal disconnection of the entire output voltage of the UPS unit. The Electronic Breaker Unit EBU allows a reduction in size of one third for UPS units because power reserves do no longer have to be kept available for tripping. The EBU increases system availability, reduces overall costs and simplifies electrical planning. Typical applications Electronic overcurrent protection by means of electronic AC circuit breakers is ideally suited to the selective protection of uninterruptible power supplies (UPS) in industrial plants. EBU ensures the power safety provided by AC UPS systems. Benefits Enhanced system availability through effective protection Reduction of overall costs by a 1/3 more efficient rating l Easy planning with a variable overcurrent protection l l AC 230 V ±10% Current ratings IN 4 A, 6 A, 10 A, 16 A Frequency 50 Hz Rated insulation voltage AC 250 V Rated voltage and current rating range of the auxiliary contact DC 110 V / 0.3 A – 33 W DC 30 V / 1.1 A – 33 W AC 120 V / 0.5 A – 60 VA AC 240 V / 0.25 A – 60 VA Min. load of aux. contact 3 mA at 24 V (valid for standard industrial surroundings, no aggressive gases) Reference ambient -35 °C...+60 °C temperature Method of operation S-type 4 mechatronic / trip free (positively trip-free) Max.* cable length (outgoing wire) from generator to EBU Type No. EBU Electronic circuit breaker for AC UPS applications Mounting method T rail mounting Design A adjustability IN UPS + IN load Number of poles 1 1-pole, 1-pole protected electronically 2 2-pole, 1-pole protected electronically Version 0with physical isolation by means of MCB 4230-T Signal input 0 without signal input Signal output 3 auxiliary change-over contact Operating voltage AC 230 V voltage rating AC 230 V Characteristic curve Bthermal 1.05 - 1.30 IN; magnetic 3.2 - 4.8 IN Cthermal 1.05 - 1.30 IN; magnetic 6.4 – 9.6 IN Current rating range 4 A (only Characteristic curve C) 6A 10 A 16 A 1638 Rated voltage UN Mode of trip / degree of trip-free behaviour Order numbering code EBU10 - T A 1 - 0 0 3 - AC 230 V - C - 10 A Preferred types Characteristic curve C Technical data B6 B10 B16 C4 C6 C10 C16 31 m/ mm2 19 m/ mm2 12 m/ mm2 24 m/ mm2 17 m/ mm2 10 m/ mm2 6 m/ mm2 Typical electrical operational values Voltage drop in V at 1 x IN IN (A) 4 6 10 16 V 0,77 0,53 0,35 0,3 Insulation co-ordination (except signalling) Rated impulse voltage 4 kV; overvoltage category III; pollution degree 2; reinforced insulation in the actuating area Rated impulse voltage: 2.5 kV Insulation co-ordination of the signalling Note: The Si contacts are not suitable for connection to SELV control voltage. Insulation resistance > 100 MOhm (DC 500 V) Degree of protection II Endurance mechanical (contacts) 20,000 cycles electronic > 15 years within specification potentiometer min. 1000 steps ordering example www.e-t-a.de 1 Electronic circuit breaker EBU Technical data Operating behaviour (endurance) IEC 60947-2 Rated service short- circuit rupture capacity (Ics) to IEC 60947-2 Rated ultimate short- circuit rupture capacity (Icu) IEC 60947-2 Signalling Auxiliary contacts LED status indication Mounting values Mounting method Mounting position Technical data 1500 cycles; UN (AC); 1*IN; cos phi= 0.8 + 8500 cycles mechanically + 12 cycles; UN (AC); 6*IN; cos phi= 0.5 3 cycles (O-CO-CO); UN (AC); 7500 A; cos phi = 0.5 Terminals - s crew terminals input side (cage clamps) horizontal busbar connection possible with comb busbars - push-in terminal on output side and on aux. contacts Cable cross section Line N Load Si Tightening torque Mass 2 cycles (O-CO); UN (AC); 10,000 A; cos phi = 0.5 1…25 mm² 1…10 mm² 0.5…4 mm² 0.5…1.5 mm² 2 Nm max. approx. 230 g 1-pole approx. 330 g 2-pole Environmental tests (typical values) Vibration (sinusoidal) test to IEC 60068-2-6, ± 0.38 mm (10 – 57 Hz), 5 g test Fc (57 – 500 Hz) 10 frequency cycles per axis Shock 30 g (11 ms) test to IEC 60068-227, test Ea Humidity 48 hours at 95% RH, temperature test to IEC 60068-2-78, +40°C test Cab Degree of protection operating area IP 40 terminal area IP00 Storage temperature -40 °C ...+70 °C 1 change over contact (terminals 11, 12, 14) terminals 11-12 closed in OFF or error condition terminals 11-14 open in OFF or error condition normal condition: green after adjustment orange blinking IN UPS / load: for 5 s error condition (electrical trip) red error condition (no voltage applied): off symmetrical rail any Max. operating currents depending on ambient temperature 4 Rated current IN (A) Max. operating currents depending on ambient temperature T (A) -35°C -30°C -25°C -20°C -15°C -10°C -5°C 0°C +5°C +10°C 4 5.08 5.00 4.92 4.84 4.76 4.68 4.60 4.52 4.40 4.32 6 7.70 7.58 7.46 7.34 7.21 7.09 6.96 6.83 6.70 6.56 10 13.89 13.62 13.35 13.07 12.81 12.53 12.23 11.93 11.63 11.33 16 20.78 20.43 20.08 19.75 19.40 19.05 18.70 18.33 17.96 17.58 Rated current IN (A) Max. operating currents depending on ambient temperature T (A) +15°C +20°C +25°C +30°C +35°C +40°C +45°C +50°C +55°C +60°C 4 4.24 4.20 4.08 4.00 3.88 3.76 3.64 3.56 3.44 3.32 6 6.42 6.27 6.14 6.00 5.84 5.68 5.52 5.36 5.19 5.01 10 11.01 10.67 10.34 10.00 9.63 9.24 8.85 8.45 8.01 7.55 16 17.20 16.80 16.40 16.00 15.55 15.11 14.66 14.20 13.71 13.21 All dimensions without tolerances are for reference only. E-T-A reserves the right change specifications at any time in the interest of improved design, performance and cost effectiveness, the right to make changes in these specifications without notice is reserved. Product markings may not be exactly as the ordering codes. Errors and omissions excepted. 2 www.e-t-a.de 1638 Electronic circuit breaker EBU Dimensions Installation drawing mounting area operating area EBU10-T 1 pole 65,7 52,8 69 ± 2 (max. 72 mm) rail EN 60715-35 x 7,5 45.3 Schematic diagram IN UPS Status indication green / orange / red Label IN Load EBU10-T 2 pole electronic control unit signalling current / control voltage measurement 45 ± 0.5 95 ON / OFF Line N I> I> 4 11 14 12 Load 70,4 N N EBU10-TA1-... EBU10-TA2-... 65,7 Connection and operating elements 1 2 3 4 5 6 7 8 9 rail EN 60715-35 x 7,5 70 ± 2 (max. 74 mm) 45.3 Toggle MCB Status indication MCB Adjustment of operating range UPS Adjustment of trip range load LED status indication of EBU10-T Screw terminal line Screw terminal neutral conductor Push-in terminal load Push-in terminal signalling (change over contact) 7 95 5 4 Label 1638 (1) (N) (2.1/2.2) (11/12/14) 6 2 45 ± 0.5 3 (IN UPS in [A]) (IN load in [A]) 1 9 8 www.e-t-a.de 3 Electronic circuit breaker EBU Time/current characteristics Curve B Curve C 1000 1000 100 100 trip time in seconds 10000 trip time in seconds 10000 10 10 1 1 0,1 0,1 0,01 0,8 1 2 4 6 8 10 20 0,01 0,8 1 40 ... times rated current 2 4 6 8 10 20 ... times rated current 40 Ambient temperature 30 °C Ambient temperature 30 °C 4 Electronic trip curve: Type B thermal magnetic electronically variable 1.05 ... 1.30 × IN 3.2 ... 4.8 × IN I (t > 100 s)= 1.05 x IN, load I (t > 10 s) = 1.6 x IN, load I (t > 1 s) = 2.7 x IN, load I (t < 20 ms) = 1,5 x IN, UPS Type C 1.05 ... 1.30 × IN 6.4 ... 9.6 × IN I (t > 300 s)= 1.05 x IN, load I (t > 30 s) = 1.3 x IN, load I (t > 3 s) = 2.3 x IN, load I (t > 0.3 s) = 5.2 x IN, load I (t < 20 ms) = 1,5 x IN, UPS Tolerance of electronic trip curve (at 23°C) Type B Type C 4 t > 100 s t < 20 ms 1,05…1,17 IN Load 1,33…1,5 IN,UPS t > 300 s t < 20 ms 1,05…1,17 IN Load 1,31…1,5 IN,UPS www.e-t-a.de 1638 Electronic circuit breaker EBU Adjustment of electronic time-current characteristics (example) Step 1: selection of EBU Selection of trip characteristic and current rating: uninterruptible power supply / UPS current rating = 12 A Characteristic curve C ⇒ inrush current SMPS Current rating: ⇒ 10 A cable protection for cable cross section 1.5mm² EBU10-TA1-003-AC230V-C-10A UPS current rating =12 A Load SMPS DC 24 V: IN = 3 A Step 2: adjustment of EBU to UPS rating Step 3: adjustment of EBU to load EBU ⇒ IN UPS: adjustment to 12 A ⇒ rated current UPS = 12 A EBU ⇒ IN UPS: adjustment to 3 A ⇒ rated current load = 3 A 4 Setting options: IN, UPS: IN, load: single phase rated current of the UPS unit at cont. load rated current of the connected load Recommendation: IN, UPS: IN, load: smaller or equal to the determined value higher or equal to the determined value Setting parameters: B6 B10 IN, UPS IN, load B16 IN, UPS IN, load C4 IN, UPS IN, load C6 IN, UPS IN, load C10 IN, UPS IN, load C16 IN, UPS IN, load IN, UPS IN, load 7 OFF 11 OFF 17 OFF 4.3 OFF 7 OFF 11 OFF 17 OFF 7.5 2 12 3 19 4 5.5 1.3 8 2 12 3 21 4 8 2.5 13 3.5 21 5 6.5 1.6 9 2.5 14 3.5 25 5 8.5 3 14 4 23 6 7 2.0 11 3 16 4 28 6 9 3.5 15 5 25 7 8.5 2.3 12 3.5 21 5 34 7 9.5 4 16 6 28 8 10 2.6 14 4 25 6 38 8 10 4.5 17 7 29 10 11 3.0 16 4.5 28 7 43 10 11 5 19 8 31 12 13 3.3 18 5 34 8 57 12 12 5.5 21 9 34 14 14.5 3.6 21 5.5 38 9 64 14 13 6 22 10 35 16 17 4.0 25 6 43 10 68 16 In the OFF condition the electronic trip curve only takes effect in the short circuit range 1638 www.e-t-a.de 5 Electronic circuit breaker EBU Accessories Busbar EBU10-Tx1 16mm² 80 A / 250 V AC (1-pole devices) Screw Screw terminal terminal 6 –– 50 50 mm² mm² connection connection from from the the side, side, 32 32 x x4 4 mm mm 6 Y 312 284 01 Y Y 312 312 288 288 01 01 N L N L N L 16 L 48,75 48,75 32,25 32,25 1020 N 4 4 35,2 27,1 27,1 4 7,5 52,8 20 20 15,9 33,3 Screw Screw terminal terminal 6 6 –– 50 50 mm² mm² connection connection from from above, above, 32 32 x x4 4 mm mm Y 312 312 289 289 01 01 Y Busbar EBU10-Tx2 16 mm² 80 A / 250 V AC (2-pole devices) 16,5 16,5 Y 312 285 01 N N L L N N L 35,2 52,8 70,4 4 N Mounting examples 16 L 27,1 27,1 52,5 52,5 1020 N 44 20 20 4 7,5 Mounting examples examples (1-pole; (1-pole; end end caps caps not not shown) shown) Mounting 15,9 33,3 End cap for busbars, 2-/3-pole Y 308 506 01 Label, packing unit 50 pcs X 222 977 50 Mounting Mounting examples examples (2-pole; (2-pole; end end caps caps not not shown) shown) 6 www.e-t-a.de 1638