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 ESS20-0.. 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 F (T = 25 C, operating voltage U = DC 24 V) Technical data ambient S lamp loads, but they are disconnected only in the event of an overload or short circuit. Operating data For optimal adjustment to the application conditions the current rating Operating voltage U DC 24 V (18...32 V) S of the ESS20-0.. can be selected in fixed values from 0.5 A...10 A and Current rating I fixed current ratings: 0.5 A, 1 A, 2 A, 3 A, N in adjustable variants 1 A/2 A or 3 A/6 A. Failure and status indication 4 A, 6 A, 8 A, 10 A are provided by a bicolour LED and an integral signal contact. switchable: 1 A/2 A or 3 A/6 A Power consumption typically 13 mA The ESS20-0.. features a width of only 12.5 mm and can be plugged Trip current (bimetal) typically 0.3 A into the E-T-A power distribution socket Module 17plus and SVSxx (only in the event of a failure, before physical isolation) (for ESS20-003) ensuring ease of installation and saving space in Status indication Bicolour LED: control cabinets. by means of Green: unit is ON, power-MOSFET is switched on US patent number: US 6,490,141 B2 Orange: in the event of overload or short circuit until physical isolation LED not lighted: push button in OFF Features position potential-free signal contact (change- l Selective load protection with physical isolation in the event of a fault. over contact) l All types of loads can be connected (small DC motors etc. on OFF-position of push button 4 request). Reverse polarity internal bimetal (fail-safe element) trips, l Active current limitation (1.8 or 1.5 times rated current I = 8 A or N protection of U push button moves into OFF position S 10 A) for safe connection of capacitive loads up to 75,000 F and Load circuit on overload/short circuit. Load output Power-MOSFET switching output l Electronic trip characteristic. (high side switch) l Reliable overload disconnection with 1.1 x I plus, even with long N Max. data of load load lines or small cable cross sections (see table 2). with side-by-side mounting see table 1 l Selectable current ratings (fixed values 0.5 A...10 A or two steps: Voltage drop at I see table 1 N 1 A/2 A or 3 A/6 A). l Overload disconnection typically 1.1 x I (1.05...1.35 x I ) Manual ON/OFF button (push-push actuation). N N l Clear status and failure indication. Short-circuit current I typically 1.8 x I / active current K N l Width per unit only 12.5 mm. limitation l Plug-in mounting utilising power distribution system Module 17plus Trip time see time/current characteristics or SVSxx (for ESS20-003), see product group 7. for physical isolation typically 5 sec at I > 1.1 x I load N for electronic disconnection typically 5 sec...100 ms at I > 1.8 x I load N or 1.5 x I N Approvals Temperature disconnection internal temperature monitoring with physical isolation Authority Norm Voltage ratings Current ratings Low voltage monitoring load output OFF at U < 7 V S VDE EN DC 32 V 0.5 A10 A ON at U >16 V 60934 S Starting delay t typically 0.3 sec after every switch-on start UL UL 1077 DC 28 V 0.5 A10 A and after applying U S Disconnection of load circuit single pole (switch contact) - by push-push actuation of the blue push button Notes - upon electronic fault disconnection (overload, short circuit) l The user should ensure that the cable cross sections of the relevant - with reverse polarity load circuit are suitable for the current rating of the ESS20 used. l Automatic start-up of machinery after shut down must be prevented Free-wheeling circuit external free-wheeling diode (Machinery Directive 98/37/EG and EN 60204-1). In the event of recommended with inductive load a short circuit or overload the load circuit will be disconnected Several load outputs must not be connected in parallel. electronically by the ESS20. 1730 www.e-t-a.de 1OK OK OK xA xA xA xA xA xA OK xA xA Electronic Circuit Breaker ESS20-0... Electronic Circuit Breaker ESS20-0... (T = 25 C, operating voltage U = DC 24 V) Technical data Ordering information ambient S 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 I , see table 1) N (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 redundant fail-safe element (thermal 8 A ETA 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 EN 60204-1) Storage temperature -20...+70 C Preferred types Standard current ratings (A) Humidity 96 hrs/95 % RH/40 C to 0.5 1 2 3 4 6 8 10 1/2 3/6 IEC 60068-2-78, test Cab. climate class 3K3 to EN 60721 x x x x x x x x x x ESS20-003-DC24V Vibration 3 g, test to IEC 60068-2-6 test Fc ESS20-001-DC24V x x x x x x x x x x Degree of protection housing: IP30 DIN 40050 terminals: IP00 DIN 40050 4 Dimensions EMC emission: EN 61000-6-3 (EMC directive, CE logo) susceptibility: EN 61000-6-2 60 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 operating area installation area test voltage AC 500 V load circuit-signal contact test voltage AC 500 V Insulation resistance > 100 M (DC 500 V) (OFF condition) LINE (+) LOAD (+) Approvals CE logo UL 1077, File E67320 Supplementary Protectors for use in Electrical Equipment mounting area IEC/EN 60934 (fixed current ratings) Dimensions (W x H x D) 12.5 x 105 x 60 mm Mass approx. 65 g Table 1: voltage drop, current limitation, max. load current current typically voltage active current max. load current at rating I drop U at I limitation (typically) 100 % ON duty N ON N reverse plug-in T = 40 C T = 50 C U U protection 6,8 0.5 A 100 m V 1.8 x I 0.5 A 0.5 A N blade terminals 1 A 140 mV 1.8 x I 1 A 1 A N 6 x 6,8 = 40,8 EN 60934-6.3-0.8 2 A 180 mv 1.8 x I 2 A 2 A N 3 A 140 mV 1.8 x I 3 A 3 A N 4 A 190 mV 1.8 x I 4 A 4 A N 6 A 280 mV 1.8 x I 6 A 5 A Label N 8 A 220 mV 1.5 x I 8 A 7 A N 10 A 280 mV 1.5 x I 10 A 9 A N 1 A/2 A 140 mV/280 mV 1.8 x I 1 A/2 A 1 A/2 A N 3 A/6 A 140 mV/280 mV 1.8 x I 3 A/6 A 3 A/5 A N adjustable LED 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. mm This is a metric design and millimeter dimensions take precedence ( ) inch 2 www.e-t-a.de 1730 10,3 12,2 102 ON 105 OFF 12,5 12,5