Electronic Circuit Breaker ESS20-0... Description Electronic circuit breaker type ESS20-0.. is designed to ensure selective disconnection of individual loads in systems which are powered by a DC 24 V switch-mode power supply. DC 24 V power supplies, which are widely used in industry today, will shut down the output in the event of an overload with the result that one faulty load in the system can lead to complete disconnection of all loads. As well as an unidentified failure this also means stoppage of the whole system. Through selective disconnection the ESS20-0.. responds much faster to overload or short circuit conditions than the switch-mode power supply. This is achieved by a combination of active current limitation and well-proven circuit breaker technology including physical isolation. The ESS20-0.. limits the highest possible current to 1.8 or 1.5 times the selected rated current of the circuit breaker. Thus it is possible to switch on capacitive loads of up to 75,000 µF lamp loads, but they are disconnected only in the event of an overload or short circuit. For optimal adjustment to the application conditions the current rating of the ESS20-0.. can be selected in fixed values from 0.5 A...10 A and in adjustable variants 1 A/2 A or 3 A/6 A. Failure and status indication are provided by a bicolour LED and an integral signal contact. The ESS20-0.. features a width of only 12.5 mm and can be plugged into the E-T-A power distribution socket Module 17plus and SVSxx (for ESS20-003) ensuring ease of installation and saving space in control cabinets. US patent number: US 6,490,141 B2 Features Selective load protection with physical isolation in the event of a fault. All types of loads can be connected (small DC motors etc. on request). Active current limitation (1.8 or 1.5 times rated current IN = 8 A or 10 A) for safe connection of capacitive loads up to 75,000 µF and on overload/short circuit. Electronic trip characteristic. Reliable overload disconnection with 1.1 x IN plus, even with long load lines or small cable cross sections (see table 2). Selectable current ratings (fixed values 0.5 A...10 A or two steps: 1 A/2 A or 3 A/6 A). Manual ON/OFF button (push-push actuation). Clear status and failure indication. Width per unit only 12.5 mm. Plug-in mounting utilising power distribution system Module 17plus or SVSxx (for ESS20-003), see product group 7. l l l l l l l l l l Approvals Authority Norm Voltage ratings Current ratings VDE EN 60934 DC 32 V 0.5 A…10 A UL UL 1077 DC 28 V 0.5 A…10 A l The user should ensure that the cable cross sections of the relevant load circuit are suitable for the current rating of the ESS20 used. Automatic start-up of machinery after shut down must be prevented (Machinery Directive 98/37/EG and EN 60204-1). In the event of a short circuit or overload the load circuit will be disconnected electronically by the ESS20. 1646 Technical data (Tambient = 25 °C, operating voltage US = DC 24 V) Operating data Operating voltage US Current rating IN Power consumption Trip current (bimetal) DC 24 V (18...32 V) fixed current ratings: 0.5 A, 1 A, 2 A, 3 A, 4 A, 6 A, 8 A, 10 A switchable: 1 A/2 A or 3 A/6 A typically 13 mA typically 0.3 A (only in the event of a failure, before physical isolation) Status indication Bicolour LED: by means of Green: unit is ON, power-MOSFET is switched on Orange: in the event of overload or short circuit until physical isolation LED not lighted: push button in OFF position potential-free signal contact (change over contact) OFF-position of push button Reverse polarity internal bimetal (fail-safe element) trips, protection of US push button moves into OFF position Load circuit Load output Power-MOSFET switching output (high side switch) Max. data of load with side-by-side mounting see table 1 Voltage drop at IN see table 1 Overload disconnection typically 1.1 x IN (1.05...1.35 x IN) Short-circuit current IK typically 1.8 x IN / active current limitation Trip time see time/current characteristics for physical isolation typically 5 sec at Iload > 1.1 x IN for electronic disconnection typically 5 sec...100 ms at Iload > 1.8 x IN or 1.5 x IN Temperature disconnection internal temperature monitoring with physical isolation Low voltage monitoring load outputOFF at US < 7 V ON at US >16 V Starting delay tstart typically 0.3 sec after every switch-on and after applying US Notes l ESS20-0.. Disconnection of load circuit single pole (switch contact) - by push-push actuation of the blue push button - upon electronic fault disconnection (overload, short circuit) - with reverse polarity Free-wheeling circuit external free-wheeling diode recommended with inductive load Several load outputs must not be connected in parallel. www.e-t-a.de 1 4 Electronic Circuit Breaker ESS20-0... Technical data Ordering information (Tambient = 25 °C, operating voltage US = DC 24 V) Type No. Fault indication, signal output ESS20 Electronic Circuit Breaker with current limitation (e.g. typically Fault indications potential-free auxiliary contact change-over 1.8 times rated current or 1.5 x IN, see table 1) (SC-SO / SC-SI) simultaneously with Version physical isolation 0 with physical isolation in the event of a failure max. DC 30 V / 0.5 A, min. 10 V / 10 mA Control input Signal output ESS20-001 blue push button in ON position: 0 without control input (single signalisation N/O) signal contact SC-SI is closed Signal output blue push button in OFF position: 1 signal contact N/O (single signalisation) signal contact SC-SI is open 2 signal contact N/C (single signalisation) Signal output ESS20-003 blue push button in ON position: 3 signal contact changeover (group signalisation) (group signalisation N/C) signal contact SC-SO is closed Operating voltage (SC-SI is copen) DC 24 V rated voltage DC 24 V blue push button in OFF position: Current rating signal contact SC-SO is open 0.5 A (SC-SI is closed) 1 A Visual indication LED lighted in ORANGE 2 A (until physical isolation) 3 A General data 4 A 6 A Backup fuse for ESS20-0.. not required because of the integral 8 A redundant fail-safe element (thermal E–T–A circuit breaker) 10 A push button in OFF position when 1 A/2 A (selectable) fail-safe element has tripped. 3 A/6 A (selectable) Blade terminals 6.3 mm to EN 60934-6.3-0.8 ESS20 - 0 0 3 - DC 24 V - 3 A/6 A ordering example Housing material plastics material (recommended type) Mounting of housing plug-in mounting utilising power distribution system Module 17plus or SVSxx Ambient temperature 0...+50 °C (without condensation, see Preferred types Preferred types Standard current ratings (A) 0.5 1 ESS20-003-DC24V ESS20-001-DC24V 2 3 4 6 8 10 1/2 3/6 x x x x x x x x x x x x x x x x x x x x Dimensions 60 operating area Dimensions (W x H x D) Mass 102 ON Supplementary Protectors for use in Electrical Equipment IEC/EN 60934 (fixed current ratings) 12.5 x 105 x 60 mm approx. 65 g 105 OFF Approvals CE logo UL 1077, File E67320 mounting area Table 1: voltage drop, current limitation, max. load current max. load current at 100 % ON duty TU = 40 °C 0.5 A 100 m V 1A 140 mV 2A 180 mv 1.8 x IN 1.8 x IN TU = 50 °C 0.5 A 0.5 A 1A 1A 2A 2A 5A 7A 10 A 280 mV 10 A 9A 1 A/2 A 140 mV/280 mV 1.8 x IN 1 A/2 A 1 A/2 A 3 A/6 A 140 mV/280 mV 1.8 x IN 3 A/6 A 3 A/5 A Label OK xA 2 adjustable xA Attention: when mounted side-by-side without convection the ESS20-0.. should not carry more than 80 % of its rated load with 100 % ON duty because of the integral thermal circuit breaker. OK 6A 8A 1.8 x IN 1.5 x IN 1.5 x IN OK 280 mV 220 mV OK 6A 8A xA 4A xA 4A xA 3A 1.8 x IN xA 3A 190 mV xA 140 mV 4A blade terminals EN 60934-6.3-0.8 6 x 6,8 = 40,8 xA 3A 1.8 x IN 1.8 x IN reverse plug-in protection 6,8 12,5 active current limitation (typically) 12,5 typically voltage drop UON at IN 12,2 current rating IN 10,3 4 EN 60204-1) Storage temperature -20...+70 °C Humidity 96 hrs/95 % RH/40 °C to IEC 60068-2-78, test Cab. climate class 3K3 to EN 60721 Vibration 3 g, test to IEC 60068-2-6 test Fc Degree of protection housing: IP30 DIN 40050 terminals: IP00 DIN 40050 EMC emission: EN 61000-6-3 (EMC directive, CE logo) susceptibility: EN 61000-6-2 Insulation co-ordination 0.5 kV/2 pollution degree 2 (IEC 60934) re-inforced insulation in operating area Dielectric strength (see dimensions) operating area test voltage AC 1000 V installation area test voltage AC 500 V load circuit-signal contact test voltage AC 500 V Insulation resistance > 100 MΩ (DC 500 V) (OFF condition) [LINE (+) – LOAD (+)] LED This is a metric design and millimeter dimensions take precedence ( mm ) inch www.e-t-a.de 1646 Electronic Circuit Breaker ESS20-0... Terminal wiring diagrams (e. g. adjustable 3 A/6 A) Basic circuit diagrams (e. g. adjustable 3 A/6 A) ESS20-001-… LOAD (+) SI S0 SC LINE (+) Gnd (-) status indication green / orange rated current IN 3A 6A Rsense SO SI SC LOAD (+) signal output load output electronic control unit ON / OFF current measurement short circuit / overload control LINE (+) DC 24 V SI Made in Germany Electronic Supplementary Protector ESS20-001-DC24V-3A/6A ESS20-001-... (single signalisation N/O) GND (-) ESS20-002-… status indication green / orange rated current IN 3A 6A Rsense SO SI SC LOAD (+) signal output load output electronic control unit LOAD (+) SI S0 SC LINE (+) Gnd (-) ON / OFF current short circuit / measurement overload control LINE (+) DC 24 V SI Made in Germany Electronic Supplementary Protector ESS20-002-DC24V-3A/6A ESS20-002-... (single signalisation N/C) 4 GND (-) ESS20-003- … control status indication green / orange rated current IN 3A 6A Rsense SO SI SC signal output 1646 www.e-t-a.de LOAD (+) electronic control unit LOAD (+) SI S0 SC LINE (+) Gnd (-) ON / OFF current short circuit / measurement overload Made in Germany LINE (+) DC 24 V SI ESS20-003-DC24V-3A/6A Electronic Supplementary Protector ESS20-003- ... (group signalisation with change over) GND (-) load output 3 Electronic Circuit Breaker ESS20-0... Time/Current characteristic curve (TA = 25 °C) disconnection typically 1.1 x IN 1.8 x IN l The trip time is typically 5 s in the range between 1.1 and 1.8 x IN*1). l Electronic current limitation starts at typically 1.8 x IN*1) which means that under all overload conditions (independent of the power supply and the resistance of the load circuit) the max. overload until disconnection will not exceed 1.8 x IN*1) times the current rating. Trip time is between 100 ms (short circuit current IK) and 5 sec (at overload with high line attenuation). l Without the current limitation activated at typically 1.8 x IN*1) a considerably higher overload current would flow in the event of an overload or short circuit. l After detection of an overload or short circuit the LED changes colour from GREEN to ORANGE. The LED will no longer be lighted after the circuit breaker has tripped. l Resetting the circuit breaker is not possible before the integral bimetal has cooled down (approx. 10 sec). 10000 1000 trip time in seconds 100 current limitation typically 1.8 x IN 10 5 1 0. 1 0.01 0 1 2 5 IK 4 3 ...times rated current *1) current limitation typically 1.8 x IN times rated current at IN = 0.5 A...6 A current limitation typically 1.5 x IN times rated current at IN = 8 A...10 A Table 2: Reliable trip of ESS20 Reliable trip of ESS20 with different cable lengths and cross sections Resistivity of copper 0 = 0.0178 (Ohm x mm2) / m US = DC 19.2 V (= 80 % v. 24 V) voltage drop of ESS20 and tolerance of trip point (typically 1.1 x IN = 1.05...1.35 x IN) have been taken into account. ESS20-selected rating IN (in A) ➞ 3 e. g. trip current Iab = 1.25 x IN (in A) ➞ 4 Rmax in Ohm = (US / Iab) - 0.050 ➞ 6 3.75 7.5 5.07 2.51 ➞ ESS20 trips after 3...5 s The ESS20 reliably trips from 0 Ohm to max. circuitry resistance Rmax Cable cross section A in mm2 ➞ 0.14 0.25 0.34 0.5 0.75 1 1.5 5 1.27 0.71 0.52 0.36 0.24 0.18 0.12 10 2.54 1.42 1.05 0.71 0.47 0.36 0.24 cable resistance in Ohm = (R0 x 2 x L) / A cable length L in meter (= single length) 15 3.81 2.14 1.57 1.07 0.71 0.53 0.36 20 5.09 2.85 2.09 1.42 0.95 0.71 0.47 25 6.36 3.56 2.62 1.78 1.19 0.89 0.59 30 7.63 4.27 3.14 2.14 1.42 1.07 0.71 35 8.90 4.98 3.66 2.49 1.66 1.25 0.83 40 10.17 5.70 4.19 2.85 1.90 1.42 0.95 45 11.44 6.41 4.71 3.20 2.14 1.60 1.07 50 12.71 7.12 5.24 3.56 2.37 1.78 1.19 75 19.07 10.68 7.85 5.34 3.56 2.67 1.78 100 25.34 14.24 10.47 7.12 4.75 3.56 2.37 125 31.79 17.80 13.09 8.90 5.93 4.45 2.97 150 38.14 21.36 15.71 10.68 7.12 5.34 3.56 175 44.50 24.92 18.32 12.46 8.31 6.23 4.15 200 50.86 28.48 20.94 14.24 9.49 7.12 4.75 225 57.21 32.04 23.56 16.02 10.68 8.01 5.34 250 63.57 35.60 26.18 17.80 11.87 8.90 5.93 Example 1: max. length at 1.5 mm2 and 3 A ➞ 214 m Example 2: max. length at 1.5 mm2 and 6 A ➞ 106 m Example 3: mixed wiring: R1 = 40 m in 1.5 mm2 and R2 = 5 m in 0.25 mm2: (Control cabinet – sensor/actuator level) R1 = 0.95 Ohm, R2 = 0.71 Ohm Total (R1 + R2) = 1.66 Ohm 4 www.e-t-a.de 1646 Electronic Circuit Breaker ESS20-0... Accessories for ESS20-0.. Single mounting sockets (up to 16 A max. load) 17-P10-Si 17-P70-Si 11 12 24 23 2(i) 12.5 .492 80 3.15 symmetrical rail EN 50022-35x7.5 adapter X20040901 polarization recess polarized recess 12.5 .492 50 1.97 4.4 .173 75 2.95 6 x .268 = 1.61 6.8 .268 10 .394 2 .079 6 .236 max. 30 max. 1.18 G-profile EN 50035-G32 Connector bus links -P10 X 210 588 01/ 1.5 mm2, (AWG 16), brown (up to 13 A max. load) X 210 588 02/ 2.5 mm2, (AWG 14), black (up to 20 A max. load) X 210 588 03/ 2.5 mm2, (AWG 14), red (up to 20 A max. load)) X 210 588 04/ 2.5 mm2, (AWG 14), blue (up to 20 A max. load) 100 quick-connect tabs 6.3 (.250) DIN 46247 tinned brass, insulated ~70 ~2.76 Busbar (10-way) (supplied as a complete package) for type 17 socket (for max. 100 A continuous load), more positions available on request X 211 157 01 with terminal X 211 157 02 without terminal Phoenix terminal AKG 35 max.cross section 35 mm2 (AWG 2) 50 1.97 57.4 2.26 64 2.52 64 2.52 2(k) 25 .984 21 .827 45.8 1.80 5 .197 41.3 1.63 1 50 1.97 57.4 2.26 6 x 6.8 = 40.8 10 .394 12.5 .492 10 .394 1.4 .055 33.3 1.31 8.5 .335 24 2(i) 23 6.5 .256 25.8 1.02 11 2.8 .110 6.3 .248 depth 10 mm (.394 in.) 22.2 polarized blade terminals 7.4 DIN 46244-A6.3-0.8 (QC .250) .874 .291 6.25 12.5 .246 .492 4.4 .173 -P70 10 .394 slot for fitting labels from Phoenix, Weidmüller 7.4 .291 3.5 .138 blade terminal DIN 46244 part 2 C profile (2xA2.8-0.8) (QC 2x.110) -P10 2(k) 12 6-way mounting socket 63-P10-Si 17-P10-Si-20025 17-P70-Si-20025 polarized blade terminal DIN 46244-A6.3-0.8 (QC .250) 1 2-way mounting socket 23-P10-Si (with adapter) cylinder head screw washer M4x4 ISO1207 A 4.3 DIN 125 nickel plated nickel plated 2 .079 Dimensions Cu rail, tin-plated 4 Module 17plus For technical data see section Power Distribution Systems 12,5 pressure-relief joint (1.1mm (.043 in.) thick constriction 154.8 6.09 Electronic Supplementary Protector 12.8 .504 5.4 .213 125 4.92 17 .669 9 .354 147,7 Insulating sleeving for busbar (10-way) Y 303 824 01 ESS20-xxx-DC24V-xxA 7 .276 Made in Germany 10 .394 M4 female connector Modul 17plus This is a metric design and millimeter dimensions take precedence ( mm ) inch Made in Germany 6 115 6 symmetrical rail EN 50022-35x7.5 right-side terminal block 14 11 12 2 12 2 1 Line 1 Line 14 slot for busbar 11 25 left-side terminal block module All dimensions without tolerances are for reference only. 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. 1646 www.e-t-a.de 5 Electronic Circuit Breaker ESS20-0... 4 6 www.e-t-a.de 1646