Electronic circuit breaker ESS30-Sxxx-DC24V Description The electronic circuit protector ESS30-S with physical isolation is the globally unique electronic overcurrent protection for DC 24 V applications as a “low energy breaker”. It meets the requirements to DIN EN 60934 and UL 1077 as a Supplementary Protector in central and decentralised energy supply units. The compact device can be plugged into the terminal block systems 17plus and 18plus and is also suitable for the SVS power distribution systems, ensuring quick and easy installation. DC 24 V switch-mode power supplies are widely used in automation today. In the event of an overload, however, they turn down the output voltage which is intended to power all connected loads. So if there is a failure in a single load of the system, the supply voltage will break down also in all other load circuits. Not only does this frequently cause undefined fault conditions, but it can even lead to machine stoppages or system downtimes. In this context selectivity means that type ESS30-S responds faster to any overload or short circuit conditions in a load circuit than the switch-mode power supply. This is ensured by the combination of active electronic current limitation and well-proven circuit breaker technology including physical isolation. The max. possible overcurrent is limited to typically 1.2 times rated current (see table 1). This allows switching on capacitive loads of up to 40,000 µF, but a disconnection will only be effected in the event of an overload or short circuit. For adjustment to the load conditions the current rating can be selected in fixed values from 0.5 A to 10A. Visual status indication is by means of a multicoloured LED and by integral signal outputs. The manual ON/OFF switch on the device itself allows start-up of certain individual load circuits and reset after disconnection on grounds of overcurrent. As soon as the ESX30-S detects an overload or short circuit in its load circuit, it blocks the load output transistor and disconnects the current flow in the faulty circuit. Physical isolation is activated. After remedy of the failure, the load output of the ESS30-S is re-activated manually by actuating the ON/OFF switch on the device. Features and Benefits l l l l l l l l l l l l l Low Energy Breaker with 30 % reduction of power loss compared to competitive product Ambient temperatures up to 60 °C Selective load protection with physical isolation in the event of a failure Compact design, 30 % height reduction compared to equivalents at a width of only 12.5 mm One trip curve for all loads (DC 24 V motors upon request) Active current limitation when switching on capacitive loads up to 40,000 µF and in case of overload/short circuit Fixed current ratings from 0.5 A to 10 A Reliable overload disconnection typically from 1.2 x IN even with long load lines or small cable cross sections Manuel ON/OFF switch (push-push actuation) Clear status indication by means of LED Integral fail-safe element, adjusted to current rating Width per channel only 12.5 mm Can be plugged into side-by-side mounted power distribution modules 17plus, 18plus and SVSxx ESS30-S... Technical data (Tamb = 25 °C, UB = DC 24 V) Operating data Operating voltage UB DC 24 V (18...30 V) Current ratings IN fixed ratings: 0.5 A; 1 A; 2 A; 3 A; 3,6 A; 4 A; 6 A; 8 A; 10 A; Standby current I0 in ON condition: typically 4 mA Trip current (bimetal) typically 0.4 A (only under fault condition, till physical isolation) l multicoloured LED: Visual status indication green: - device is ON (S1 = ON) load circuit connected orange: - overload or short circuit until electronic disconnection red: -device switched OFF electronically load circuit OFF - undervoltage (UB < 14 V) OFF: - manually OFF (S1 = OFF) load circuit physically isolated or device is dead-voltage 4 l Potential-free signal contact l On/off position of the switch S1 Load circuit Load output power MOSFET switching output (plus switching) Overload and short typically 1.2 x IN circuit disconnection with active current limitation Trip times for see time/current characteristic electronic disconnection overload trip time typically 500 ms short circuit trip time depending on current rating (see table 1) for physical isolation typically 5 s (3 ... 9 s) Temperature disconnectioninternal temperature monitoring with physical isolation Undervoltage with hysteresis, no reset required: monitoring »OFF« at UB < 14 V of load output »ON« at UB > 17 V Switch-on delay tStart typically 2 ms after each ON operation, reset and after applying of UB Capacitive loads up to 40,000 µF Free-wheeling diodeexternal free-wheeling diode recommended for inductive load Parallel connection of several load outputs not allowed 1617 www.e-t-a.de 1 Electronic circuit breaker ESS30-Sxxx-DC24V Technical data (Tamb = 25 °C, UB = DC 24 V) Order numbering code Error message: Signal output F potential-free signal contact switches simultaneously with physical isolation, max. DC 30 V / 2 A, min. DC 12 V / 10 mA Signal output ESS30-S003 blue push button is in ON position: Signal change over contactsignal contact 13-14 is closed 13-12 is open blue push button is in OFF position: signal contact 13-14 is open 13-12 is closed Visual status indication LED green UB is applied and switch S1 is ON and no overload, no short circuit 4 l device switched off (switch S1 is OFF) OFF condition LED off l load circuit physically isolated l no operating voltage UB LED orangeoverload conditions > 1.2 times rated current until, electronic disconnection LED redelectronic disconnection upon overload, short circuit or undervoltage General data Fail-safe elementback-up fuse for ESS30-S.. not required due to integral redundant fail-safe element (protective element) Blade terminals 6.3 mm to EN 60934-6.3-0.8 Housing material moulded Mountingpluggable into power distribution systems for side-by-side mounting (module 17plus or 18plus by E-T-A) Ambient temperature0...+60 °C (without condensation, cf. EN 60204-1) Storage temperature -40...+70 °C Humidity96 hours at 95 % RH, 40 °C to IEC 60068-2-78,-Cab climate class 3K3 to EN60721 Vibration 3 g test to IEC 60068-2-6, test Fc Degree of protection operating area IP30 EN 60529 installation area IP00 EN 60529 EMC requirements noise emission: EN 61000-6-3 (EMC directive, CE logo) susceptibility: EN 61000-6-2 Insulation co-ordination 0.5 kV / pollution degree 2 (IEC 60934) reinforced insulation in operating area Dielectric strength (see also dimensions) operating area test voltage AC 1000 V installation area test voltage AC 500 V load circuit auxiliary contact test voltage AC 500 V Insulation resistance > 100 MΩ (DC 500 V) between (OFF condition) LINE (+) and LOAD (+) Dimensions (w x h x d)12.5 x 78.5 x 60 mm (tolerances to DIN ISO 286 part 1 IT13) Operating force ON 5...8 N OFF 7...10 N Mass approx. 39 g 2 Ttype ESS30 Electronic circuit breaker with current limitation Mounting S Version 0 with physical isolation in the event of a failure Signal input 0 without signal input Signal output: 3 d ouble auxiliary change over contact (min. 12 V/10 mA; max. 30 V/2 A) Operating voltage DC 24 V voltage rating DC 24 V Current ratings 0.5 A 1A 2A 3A 3.6 A 4A 6A 8A 10 A ESS30 - S 0 0 3 - DC 24 V - 6 A ordering example Notes lThe user has to ensure that the cable cross section of the load circuit in question complies with the current rating of the ESS30-S used. l In addition special precautions must be taken in the system or machine (e.g. use of a safety PLC) which reliably prevent an automatic re-start of parts of the system (cf. Machinery Directive 2006/42/EG and EN 60204-1, Safety of Machinery). In the event of a failure (short circuit/overload) the load circuit will be disconnected electronically with physical isolation of the contacts by the ESS30-S. Approvals of ESS30-S Approval authority Standard Rated voltage Current ratings VDE EN 60934 DC 24 V 0.5 A…10 A UL UL 1077 DC 24 V 0.5 A…10 A www.e-t-a.de 1617 Electronic circuit breaker ESS30-Sxxx-DC24V Table 1: Voltage drop, current limitation, trip times, fail-safe element, max. load current current rating typical active current IN voltage drop limitation UON at IN typically trip time IKS typically 1) trip time IOL typically fail-safe element max. load current at 100 % ON duty 2) TAmb = 40 °C TAmb = 50 °C TAmb = 60 °C 0.5 A 90 mV 1.2 x rated current 500 ms 500 ms 2A 0.5 A 0.5 A 0.5 A 1A 100 mV 1.2 x rated current 500 ms 500 ms 2A 1A 1A 1A 2A 110 mV 1.2 x rated current 500 ms 500 ms 4A 2A 2A 2A 3A 150 mV 1.2 x rated current 500 ms 500 ms 6.3 A 3A 3A 3A 3.6 A 155 mV 1.2 x rated current 350 ms 500 ms 6.3 A 3.6 A 3.6 A 3.6 A 4A 160 mV 1.2 x rated current 280 ms 500 ms 6.3 A 4A 4A 4A 6A 170 mV 1.2 x rated current 150 ms 500 ms 10 A 6A 6A 6A 8A 190 mV 1.2 x rated current 280 ms 500 ms 15 A 8A 7.5 A 7A 10 A 210 mV 1.2 x rated current 200 ms 500 ms 15 A 9.5 A 9A 8.5 A Note: When mounted side-by-side without convection the devices can only carry max. 80 % of their rated current continuously (100 % ON duty) due to thermal effect. 1) short circuit 2) overload 4 Connection diagram ESS30-S003-... (Example) Dimensions ESS30-S 60 Example ESS30-S003 fail-safe G 1617 N Y 72,5 ON 78,5 OFF 2 Load + 12 SI 14 SO 11 GND 13 SC 6 x 6,8 = 40,8 50 blade terminals to EN 60934-6,3x0,8 GND (-) 12,3 LOAD (+) load output A 6,8 reverse plug-in protection 14 12 13 SO SI SC signal output M installation area 1 Line + activation operating condition green / orange / red R 10,3 ON / OFF E Electronic Circuit Breaker ESS30-S003-DC24V-0.5A Made in Germany operating area electronic control unit Rsense Short circuit/ current overload measurement Line (+) DC 24 V www.e-t-a.de 3 Electronic circuit breaker ESS30-Sxxx-DC24V ESS30-S Signal output / (connection diagrams) Connection diagram ESS30-S003-... (Example) The auxiliary contacts are shown in OFF or fault condition mounting area operating area ESS30-S003 1 Line + 11 GND R M A N Y 12 SI SC 13 E 14 SO GND 11 G 13 SC LINE + 1 Electronic Circuit Breaker ESS30-S003-DC24V-0.5A Made in Germany without signal input with signal output f single signal, change-over 2 Load + SO 14 SI 12 2 LOAD + operating condition 13-14 closed; 13-12 open fault condition 13-12 open; 13-14 closed Typical time/current characteristic (Tamb = 25 °C) min. 1.05 x IN max. 1.35 x IN 10000 l 1000 trip time in seconds 4 l The electronic current limitation typically begins at 1.2 x IN. This means: under all overload conditions (independent of power supply and load circuit resistance) typically 1.2 times rated current is applied until disconnection. The corresponding current limitation value ILimit depends on the current rating of the device IN. 100 10 1 0,5 l 0,1 0,01 0 trip time depends on rated current (see table 1) 4 he overload trip time is typically 500 ms T (e.g. ESS30-S...-6A) 1 2 disconnection and current limitation typically 1.2 x IN 4 3 ...times rated current 5 IK Without the current limitation getting into effect at typically 1.2 x IN there would be a much higher overcurrent in the event of an overload or short circuit. l Reset of the circuit breaker is only possible approximately 10 sec after tripping. www.e-t-a.de 1617 Electronic circuit breaker ESS30-Sxxx-DC24V Mounting examples for ESS30-S Module 17plus For technical data see section Power Distribution Systems Retaining clip Y 311 978 01 Retaining clip for ESS30-S G E R M A N Y Installation example with ESS30-S with optional retaining clip Module 18plus For technical data see section Power Distribution Systems ON 107 (OFF 113) 4 7,5 130±0.8 13,1 1617 www.e-t-a.de 5 Electronic circuit breaker ESS30-Sxxx-DC24V 4 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. 6 www.e-t-a.de 1617