Double Pole Electronic Circuit Breaker ESS22-T Description The electronic circuit breaker type ESS22-T extends the E-T-A product range of electronic circuit protection for DC 24 V applications. It is a double pole version providing physical isolation. It meets the requirements of the machinery directive 2006/42/EC and the affiliated standard EN 60204-1 “Safety of Machinery, Electrical Equipment of Machines”, para 9.4.3.1. The combination of active electronic current limitation in the event of a short circuit and overload disconnection from 1.1 times rated current provides double pole selective protection of DC 24 V load systems. 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 ESS22-T responds much faster to overload or short circuit conditions than the switch-mode power supply. This is achieved by active current limitation. The ESS22-T limits the highest possible current to typically 1.4 times the selected rated current. Thus it is possible to switch on capacitive loads of up to 20,000 µF, but they are disconnected only in the event of an overload or short circuit. For optimal alignment with the characteristics of the application the current rating of the ESS22-T can be selected in fixed values from 0.5 A...10 A. Failure and status indication are by a multicolour LED and integral signal contacts. Remote operation is possible by means of a physically isolated control input. The manual ON/OFF button allows separate actuation of individual load circuits. The ESS22-T, with a width of only 22.5 mm, can be snapped onto symmetrical rails ensuring ease of installation and saving space in control cabinets. Upon detection of overload or short circuit in the load circuit, the MOSFET of the load output will be blocked to interrupt the current flow. In addition the load output will be physically isolated by a mechanical switching element. Upon failure remedy the load output of the ESS22-T is re-activated manually by operating the ON/OFF switch on the device or optionally by the physically isolated reset input and/or the control input. US patent number: US 6,490,141 B2 Features l l l l l l l l l l l l l l Double pole electronic circuit breaker with physical isolation at load output Double protection of “load+ path” through electronic protection and failsafe element Double protection of “load- path” through electronic protection and failsafe element Selective load protection, electronic trip curve Active current limitation for safe connection of capacitive loads up to 20,000 µF, DC motors and on overload/short circuit Fixed current ratings 0.5 A...10 A Low voltage monitoring Manual ON/OFF button Physically isolated control input for ON/OFF optional Physically isolated reset input RE optional Clear status and failure indication through multicolour LED Two signal contacts (break contact and make contact) Width per unit 22.5 mm Rail mounting Approvals Authority Standard Rated voltage Current ratings VDE EN 60934 DC 32 V 0.5 A…10 A UL UL 1077 C22.2 No 235 DC 30 V 0.5 A…10 A 1646 ESS22-T Technical data Operating data Operating voltage US Current rating IN Closed current I0 (Tambient = 25 °C, operating voltage US = DC 24 V) 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 ON condition: typically 27 mA with signal output: typically 37 mA l multicolour LED: Status indication by means of GREEN: - unit is ON, load circuit switched on ORANGE: - in the event of overload or short circuit until disconnection RED: - after overload/short circuit disconnection - upon low voltage in ON condition - after switch-on till the end of the ON delay period OFF: - switched off by means of switch or control input - no operating voltage applied l potential-free signal contact l ON/OFF condition of switch Load circuit Load output Power-MOSFET and relay switching output with physical isolation, plus and minus-switching Overload disconnection typically 1.1 x IN (1.05...1.35 x IN) Short-circuit current IK active current limitation typically 1.4 x IN (see table 1) Trip times see time/current characteristics typically 3 s at ILoad > 1.1 x IN typically 100 ms…3 s at ILoad > 1.4 x IN Temperature disconnection internal temperature monitoring with electronic disconnection Low voltage monitoring OFF at typically < 16.0 V ON at typically > 17.5 V automatic switch ON or OFF Starting delay tStart typically 0.5 sec after every switch-on, after reset and after applying US Disconnection of load circuit double pole, with physical isolation - manually on the breaker via ON/OFF switch (OFF) - after overload/short circuit disconnection - via external control input - at low voltage - no operating voltage applied www.e-t-a.de 1 4 Double Pole Electronic Circuit Breaker ESS22-T Technical data Technical data (Tambient = 25 °C, operating voltage US = DC 24 V) Reset after overload or short circuit disconnection - remedy the external overload or short circuit failure - manual RESET on the breaker via ON/OFF switch - no reset with voltage interruptions (status memory) - no reset possible via external control input IN - external reset optionally possible via reset input RE Free-wheeling circuit external free-wheeling diode recommended with inductive load Load outputs must not be connected in parallel Status output SF ESS22-TA-0x1 Electrical data potential-free signal contact 1 break contact, terminal 11-12 (closed in OFF or failure condition) 1 make contact, terminal 13-14 (open in OFF or failure condition) max. DC 30 V / 0.5 A, min. 10 V / 10 mA Fault signal output fault conditions: - ON/OFF switch is in OFF position (manually) - after overload/short circuit disconnection - external control input (OFF) - low voltage - no operating voltage US Control input IN+/INESS22-TA-01x / ESS22-TA-03x Electrical data control input (IN+/IN-) is physically isolated from load circuit (optocoupler) voltage max. + DC 32 V high > DC 12 V ≤ DC 32 V (switch on) low ≤ DC 5 V > 0 V (switch off) current consumption typically 3…9 mA (DC +12 V…32 V) 4 Reset function ESS22-TA-03x A non-conducting load output (after an overload/short circuit disconnection) can be reset externally via the control input. In order to do that the control input has to be switched off for >100 ms Links Reset input RE+ / REElectrical data Reset signal RE General data Fail-safe element manual ON/OFF switch on breaker is linked to the external control input IN+ by means of an AND function ESS22-TA-02x reset input (RE+ / RE-) physically isolated from load circuit (optocoupler) voltage: max. + DC 32 V high > DC 12 V ≤ DC 32 V low ≤ DC 5 V > 0 V power consumption typically 3…9 mA (DC +12 V…32 V) min. pulse duration for RESET 100 ms The electronically blocked load output (blocked after overload/short circuit disconnection) may be reset via an external reset pulse (+ DC 24 V). A common reset signal can be applied to several devices simultaneously. RESET - pulse/edge from low (min. 100 ms) to high (min. 100 ms) 2 (Tambient = 25 °C, operating voltage US = DC 24 V) Terminals Screw terminalsM3 Max. cable cross section Rigid / flexible 0.14 – 2.5 mm2 (AWG 26-14) Wire stripping length8 mm Tightening torque (EN 60934) 0.5 – 0.6 Nm Loop through option redundant LINE and LOAD terminals, max. cont. load for line entry 10 A Housing material moulded Mounting symmetrical rail to EN 50022-35x7.5 Ambient temperature 0...+50 °C (without condensation, see EN 60204-1) Storage temperature -20...+70 °C Humidity Vibration Degree of protection Standards, directives Insulation co-ordination (IEC 60934) Insulation voltage Dielectric strength Reverse polarity protection Dimensions Mass 96 hrs/95 % RH/40 °C to IEC 60068-2-78, test Cab. climate class 3K3 to EN 60721 3 g, test to IEC 60068-2-6 test Fc housing: IP20 DIN 40050 terminals: IP20 DIN 40050 CE logo to EMC directive emitted interference: EN 61000-6-3 immunity to interference: EN 61000-6-2 surge voltages: EN 61000-4-5 0.5 kV/2 pollution degree 2 DC 500 V between the physically isolated areas: load circuit in OFF condition, signal input and signal outputs max. DC 32 V integral see following page (tolerances to DIN ISO 268 part 1 ± IT 13) approx. 110 g Table 1: voltage drop, current limitation, max. load current current rating IN typically voltage drop UON at IN active current limitation (typically) max. load current at 100 % ON duty Tamb = 40 °C Tamb = 50 °C 0.5 A 80 mV 1.4 x IN 0.5 A 0.5 A 1A 110 mV 1.4 x IN 1A 1A 2A 140 mV 1.4 x IN 2A 2A 3A 100 mV 1.4 x IN 3A 3A 4A 130 mV 1.4 x IN 4A 4A 6A 180 mV 1.4 x IN 6A 6A 8A 130 mV 1.4 x IN 8A 7A 10 A 170 mV 1.4 x IN 10 A 9 Attention: when mounted side-by-side without convection the ESS22-T should not carry more than 80 % of its rated load with 100 % ON duty due to thermal effects. failsafe element aligned to rated current (back-up fuse) www.e-t-a.de 1646 Double Pole Electronic Circuit Breaker ESS22-T Ordering information Time/Current characteristic curve (TA = 25 °C) Type No. ESS22 double pole electronic circuit breaker, with current limitation Mounting and design TA rail mounting, with ON/OFF switch Version 0 with double pole physical isolation at load output Signal input 0 without signal input 1 with control input IN-/IN+; without reset function upon overload 2 with reset input RE-/RE+ 3 with control input IN-/IN+; with reset function upon overload (only for ESS22-TA-xxx) Signal output 0 without signal output (only for version TA-00) 1 signal contacts: 1 make contact, 1 break contact Operating voltage DC 24 V rated voltage DC 24 V Current rating 0.5 A 1A 2A 3A 4A 6A 8A 10 A ESS22 - TA - 0 0 1 - DC 24 V 4A disconnection typically 1.1 x IN current limitation typically 1.4 x IN 10000 1000 trip time in seconds 100 10 3 1 0.1 0.01 0 1 2 IK 4 3 ...times rated current l The trip time is typically 3 s in the range between 1.1 and 1.4 x IN l Electronic current limitation occurs at typically 1.4 x IN which means that under all overload conditions (independent of the power supply and the resistance of the load circuit) the max. overload before disconnection will not exceed 1.4 x IN) times the current rating. Trip time is between 100 ms and 3 sec (depending on overload or at short circuit). l Without this current limitation a considerably higher overload current would flow in the event of an overload or short circuit. ordering example Please note: l The user should ensure that the cable cross sections of the relevant load circuit are suitable for the current rating of the ESS22-T used. l 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 ESS22-T ensures double pole physical isolation of the load circuit. Dimensions Preferred types ESS22-TA-... Standard current ratings (A) 0.5 1 2 3 4 6 8 10 x x x x x x x x ESS22-TA-001-DC24V 92 3.62 Schematic diagram ESS22-TA-011 13 11 1.1 1.2 3.1 LINE+ external control input 3.2 A1 A2 B1 IN+ LINE- 85 3.35 line entry DC 24 V symmetrical rail EN 50022-35x7.5 (not included in delivery) Preferred types 4 22.5 .886 ok 3A on off reset ESS 22-T B2 IN- Failsafe electronic protection with current limitation |> |> LED electronic control unit main contacts Si LOAD+ 12 14 2.1 ON/OFF/RESET switch LOAD- 2.2 4.1 4.2 load 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 3 Double Pole Electronic Circuit Breaker ESS22-T Terminal wiring diagrams ESS22-TA-... (Example) Terminal connection ESS22-TA-031-DC 24 V-xxx A ESS22-TA-000-DC 24 V-xxx A Example: B2 IN14 13 11 symmetrical rail LOAD+ 2.1 2.2 4.1 4.2 LOAD- B1 A2 3.1 3.2 LINE- 4.1 4.2 LOAD- LINE+ 1.1 1.2 GERMANY LOAD+ 2.1 2.2 Elektronischer Schutzschalter Electronic Supplymentary Protector ESS22-TA-031-DC24V-xxA IN+ A1 3.1 3.2 LINE- 12 LINE+ 1.1 1.2 LINE+ / LINE1.1/1.2/3.1/3.2 IN+ / INA1/A2/B1/B2 GERMANY Elektronischer Schutzschalter Electronic Supplymentary Protector ESS22-TA-000-DC24V-xxA ESS22-TA-011-DC 24 V-xxx A break contact / make contact 11/12/13/14 LOAD+ / LOAD2.1/2.2/4.1/4.2 GERMANY Elektronischer Schutzschalter Electronic Supplymentary Protector ESS22-TA-011-DC24V-xxA LINE+ 1.1 1.2 3.1 3.2 LINE- 11 IN+ A1 12 A2 13 B1 B2 IN- 14 LOAD+ 2.1 2.2 4.1 4.2 LOAD- 4 ESS22-TA-031-DC 24 V-xxx A GERMANY Elektronischer Schutzschalter Electronic Supplymentary Protector ESS22-TA-031-DC24V-xxA LINE+ 1.1 1.2 3.1 3.2 LINE- 11 IN+ A1 12 A2 13 B1 B2 IN- 14 LOAD+ 2.1 2.2 4 4.1 4.2 LOAD- www.e-t-a.de 1646