Electronic Circuit Breaker ESS1 for System SVS1
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1 Electronic Circuit Breaker for System SVS Description The electronic circuit breaker is designed to ensure selective disconnection of individual s in industrial systems which are powered by a DC 24 V switch mode power supply. Selectivity means that the responds faster to over or short circuit conditions than the power supply. The has four major tasks:. In the event of an over or short circuit in a circuit, even the shortest break-down of the output voltage of the power supply to values below 8 V must be prevented under all circumstances. Otherwise all other components fed by the power supply will respond unpredictably to the voltage dip. Result: reset, re-start, standstill of components or whole system. The voltage dip is caused by the characteristic overcurrent behaviour of the power supply (straight characteristic curve, fold-back curve, hiccup mode etc.). 2. Selective protection/disconnection must be ensured even at worst-case over conditions. Long feed lines prevent the occurrence of a significant short circuit current (see table ). 3. The current limited switch-on of s with high input capacitance must be ensured without increase of rated current adjustment. Electronic DC24V components contain big input capacitors for suppression or back-up of voltage dips. 4. Fault indication Features Electronic circuit breaker for protecting system components (sensors, actuators, field bus couplers, control units etc.) which are powered by a DC 24 V switch mode power supply. Connection of all types (resistive, inductive, capacitive). Alternative current ratings ( or ) can be selected by means of the switch on the device. Over- and short-circuit proof switching output with active limitation of inrush and short-circuit currents. Over-dependent trip characteristics ( thermal-magnetic circuit breaker style, but much narrower trip curve tolerances). Power Mosfet switching output, high side switch. Additional disconnection by electromechanical switch in the event of over. RED actuator button: reset or manual trip. Visual status indication: GREEN LED: O.K. signal YELLOW LEDs (,, 80, % of rated current): current indication RED LED (0 %): flashing or lighted after tripping Fault indication through auxiliary contact (N/C, break contact). Integral thermal circuit breaker (with VDE, UL, CSA approval) serving as a fail-safe element in the circuit and providing reverse polarity protection. Option: control input -.../SVS-... Technical data (T U ambient temperature= 25 C, operating voltage U B = DC 24 V) Operating data Operating voltage U B DC 24 V (DC V) Current rating I N or (selected by means of a switch) Current consumption I 0 typically 3 ma ( output non-conductive) OK signal GREEN LED lighted when operating voltage is applied Reverse polarity protection U B integral with the device -> internal failsafe-element tripped (see»reset«on connection side), LEDs are unlit Insulation voltage AC 500 V (control circuit, circuit, fault indication) Load circuit Load output Power-MOST switching output (high side switch) Max. data of DC 24 V / 5 A (resistive, inductive, ( % ON duty) capacitive, lamp ) Voltage drop at I N typically 220 mv / typically 4 mv / Over disconnection typically. x I N Trip times see time/current characteristic curve: t v : I > x I N typ. 5 s, LED RED (0 %) flashing until disconnection occurs t v 2: I > 2 x I N typ. 5 s... ms, LED RED (0 %) lighting after disconnection, fault indication F closed Short-circuit current I K active current limitation max. 2 x I N ( or 2 A) Trip time t K (at I K ) typically ms Temperature disconnection: internal temperature monitoring with physical isolation, LED RED (0 %) lighting after disconnection, fault indication F Load current indication 4 YELLOW LEDs (,, 80, %) or RED LED (0 %) signalling utilization of the set current rating in % (e.g. higher than %) Starting delay t start typically s upon application of U B after each switch-on Free-wheeling circuit integral bi-directional transil diode; external free-wheeling diode recommended for inductive s Disconnection of circuit single pole (switch contact) - by manual operation of the RED button - upon electronic fault disconnection (over, short-circuit) 05/0 25
2 Electronic Circuit Breaker for System SVS Technical data (T ambient = 25 C, operating voltage U B = DC 24 V) Several outputs must not be connected in parallel Control circuit (option) Control input EC/EO - to customer requirement: possibly physically isolated via opto coupler/ control voltage U S / control current I S / switching frequency f max / control signal (U S = >><<) Switching times /t on / t off / leakage current/ protection Fault indication Fault indication F potential-free auxiliary contact (-), break contact (N/C), DC 30 V / max. A Status of fault indication Contact closed in the event of power failure or when the switch (RED button) has tripped upon: - over/short-circuit in the circuit (RED LED lights). The fault indicated by that LED is stored until the RED operating button is reset. - manual disconnection of the device Signal delay typically 50 ms Reverse polarity of U B internal fail-safe element will trip General data Ambient temperature 0... C (without condensation, see EN 204-) Storage temperature C Blade terminals.3 mm to DIN 4244-A, 3-0,8 for E-T-A Power distribution system SVS-xx-... Backup fuse for not required because of the integral redundant fail-safe element (thermal E T A circuit breaker) Housing material aluminium Mounting of housing Plug-in for distribution system SVS for symmetric rail mounting Vibration 3 g, test to IEC 8-2- test Fc Degree of protection Housing: IP20 DIN 050/IEC 529 Terminals: IP00 DIN 050/IEC 529 EMC Emission: EN (EMC directive, CE logo) Susceptibility: EN --2 Dimensions (W x H x D) 7.5 x x 55 mm Mass approx. 80 g Ordering information Type No. Electronic Circuit Breaker for DC 24 V applications Version 0 standard Control input 0 without control input with control input 8.5 V...30 V (option) Signal output 0 without auxiliary contact with auxiliary contact (N/O) Input voltage DC 24 V voltage rating DC 24 V ( V) Current rating / adjustable (by slide switch) DC 24 V - / ordering example Basic circuit diagram RESET-button (red) On/Off LOAD ( ) Gnd % % 80% % OK yellow yellow yellow yellow red green electronic control unit EC Gnd Control input R sense E0 Fault indication F Reset DC 24 V LINE (+) Fail-Safe Current rating I N Shown on the switched-off and de-energised condition. The red reset button is in the tripped (OFF) position, the auxiliary contacts of the fault indication (-) are closed /0
3 - Electronic Circuit Breaker for System SVS Time/Current characteristic curve 00 disconnection point typ.. x I N 0 trip time in s 0 current limitation max. 2 x I N IK min..05 x I N max..25 x I N...times rated current short-circuitdisconnection typ. ms Explanation of the characteristic curve: The trip time is typically 5 s in the range between.05 and 2 x I N. Electronic current limitation starts at 2 x I N which means that under all over conditions (independent of the power supply and the resistance of the circuit) the max. over until disconnection will not exceed two times the current rating. Without the current limitation activated at 2 x I N a much higher over current would flow in the event of an over or short circuit. Trip time after activation of current limitation is between 5 s and ms (short circuit). Terminal wiring diagram Dimensions + SO EO EC OFF ON RESET fail-safe element Elektronischer Schutzschalter Electronic Circuit Breaker -00-DC24V-3A/A On/Off control unit LOAD ( ) Gnd Reset LINE (+) blade terminal A to DIN 4244 (QC.250) ON OFF OFF ON reverse plug-in protection x.8 =.8 x.28 = OK 80 This is a metric design and millimeter dimensions take precedence ( mm ) inch 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. 05/0 253
4 Electronic Circuit Breaker for System SVS Matrix of the switching conditions Operating mode Trouble-free Over: Short-circuit: temperature internal- (unit without operation I =...2 x I N I >2 x I N disconnection failure Control input) (> 50 C/ 302 F) * **) Load output ON OFF OFF OFF = conductive = non-conductive = non-conductive = non-cond. Load circuit -pole yes, yes, yes, discon. (through no after approx. 5 s after approx. after approx. switching contact) 5 s... ms ms Indication GREEN LED lighted lighted lighted lighted not O. K.-signal lighted RED LED not lighted LED flashes for LED flashes for LED (I>0 % von I N ) approx. 5 sec, approx. 5 sec, flashes LED flashes LED flashes momentarily, momentarily, momentarily, lighted after lighted after lighted after tripping tripping tripping YELLOW LEDs LEDs none of the LEDs none of the none of the Load current lighted, lighted after LEDs lighted LEDs indication (>,, dependent on tripping after tripping lighted after 80, % von I N ) current tripping Fault indication F open closed closed closed aux. contact RED actuator/ ON tripped tripped tripped reset button - With manual operation (RED button pulled): fault indication F, RED LED also lighted. * Upon response of the internal temperature control (chip temperature of power semiconductors is +50 C / +302 F for a short period of time) the current is disconnected. The circuit breaker trips and the red LED (I > 0 %) is lighted. If the is to be switched off again, a short cooling down period must be taken into account due to the temperature hysteresis of the semiconductor chip. The cooling down period will be approx. 5 sec dependent on the energy absorption (behaviour similar to thermal circuit breaker). **) Electronic control unit defective - internal fail-safe element has tripped (see»reset«on terminal side of the ). Reliable trip of with different cable lengths and cross sections Specific conductivity of copper R 0 = (Ohm x mm 2 ) / m U B = DC 9.2 V (= 80 % v. 24 V) voltage drop of and tolerance of trip point (typically. x I N = x I N ) have been taken into account. -selected rating I N (in A) 3 trip current I ab = max..25 x I N (in A) trips after typically 5 s R max in Ohm = (U B /I ab ) Table : Electronic Circuit Breaker for DC 24 V The reliably trips from 0 Ohm to max. circuitry resistance R max Cable cross section A in mm cable length L in meter cable resistance in Ohm = (R 0 x 2 x L) / A (= single length) Example : max. length at.5 mm 2 and 24 m Example 2: max. length at.5 mm 2 and 0 m Example 3: mixed wiring: R = m in.5 mm 2 and R2 = 5 m in 0.25 mm 2 : (Control cabinet sensor/actuator level) R = 0.95 Ohm, R2 = 0.7 Ohm Total (R + R2) =. Ohm /0
5 Power Distribution System SVS for Description The E-T-A power distribution system SVS is designed to accommodate the electronic circuit breaker series ESSx. It distributes the current supplied by a switch mode power supply up to A to 4, 8, 2 or channels. Mains connection is via screw terminals. The individual circuit breakers can be plugged in. Loads are connected via cage clamp screwless terminals. The power distribution includes integral wiring of the signalisation of the individual channels which can be combined to group signals A and B. The SVS can be snapped onto a DIN symmetrical rail. SVS-XX-... Features Power distribution system for short-circuit limited DC 24 V applications up to max. A continuous Three screw terminals (max. 0 mm 2 /AWG 8) for: - DC 24 V (+) (green) - DC 24 V (green) - (functional earth) (green) for connecting the switched-mode power supply Modular design -positions: - SVS--...: channels - SVS-2-...: 2 channels - SVS : 8 channels - SVS : 4 channels Load outputs (L) per channel (complete with Combicon screwless connectors, wiring 4 x max. 2.5 mm 2 (AWG 4)/ without connector sleeve): - () group output (+) internally bridged across all channels (for special applications) - () output (+), per channel - DC 24 V - () functional earth Signal output (S) per channel (complete with Combicon screwless connectors, wiring 3 x max. 2.5 mm 2 (AWG 4)/ without connector sleeve): - () single output - (SA) signal group A - (SB) signal group B 2 Group signal outputs (output or further connection) (complete with Combicon screwless connectors, wiring 3 x max. 2.5 mm 2 (AWG 4)/ without connector sleeve): - (SAS) signal group A --> group signal - (SBS) signal group B --> group signal - (S) common return wire for groups A/B (protected by a Amp. E-T-A Circuit Breaker F/S) Option: control input (E) - not used - Ordering information Type SVS Power distribution system Short-circuit limited DC 24 V applications Max. A continuous 3 screw terminals max. 0 mm 2 (AWG 8) for - DC 24 V (+) /DC 24 V / functional earth Version, number of channels (K) 04 4 channels (K...K4) 08 8 channels (K...K8) 2 2 channels (K...) channels (K...K) Load outputs (L) per channel L2 (+), (on request) L3 (+),, (on request) L4 4 outputs per channel () group output (+) internally bridged across all channels () output (+), per channel DC 24 V () functional earth Signal outputs (S) without signal outputs (option) S - with signal output (S) per channel: () single output (SA) signal group A (SB) signal group B - with group signal outputs: (SAS) signal group A group signal (SBS) signal-group B group signal (S) common return wire for groups A/B Control input (E) E0 without control input E with control input (E) per channel (option) Fitting variants C0 not fitted C complete with Combicon screwless connectors (cage clamp) max. 2.5 mm 2 ( AWG 4) without connector sleeve SVS - - L4 - S - E0 - C ordering example 05/0 255
6 Power Distribution System SVS for Dimensions SVS Combicon screwless connector (cage clamp) wire bridge, insulation (accessory) slot for fitting labels.57 thermal overcurrent circuit breaker ( A) 25 for group signal protection 4.92 K4 = 7 K8 = 89 = 2 K = 333 K4 = 4. K8 = 7.44 = 0.28 K = 3. E symmetrical rail EN x7.5 G-profile EN G32 EAS ECS EBS EAS ECS EBS SAS S SBS SAS S SBS S SVS-- DC 24 V (+) (+) K K4 K5 K K7 K8 K9 K0 K K4 K5 K L channel K E - control input channel (option) S - signal output, per channel L - output, per channel terminals power supply Connection diagram SVS-(n) X3.2 S X3. X3.3 SAS SBS S SAS SBS K X4. X4.2 X4.3 SA SB SA SB SA SB SA Kn SB X4 X42 X43 X(+n) X3 X32 F/S RESET (+) (+) (+) (+) DC 24 V DC 24 V (+) X X2 X3 X(0+n) X.4 X3 X2 X X.3 X.2 X. K channel channel 2 channel 3 Kn channel n n = 4, 8, 2, 25 05/0
7 Power Distribution System SVS for Dimensions SVS-, fitted with wire bridge insulation (accessory) slot for fitting labels Combicon screwless connector (cage clamp) K4 = 7 K8 = 89 = 2 K = 333 K4 = 4. K8 = 7.44 = 0.28 K = 3. E symmetrical rail EN x7.5 G profile EN G32 S EAS ECS EBS SAS S SBS EAS ECS EBS SAS S SBS EA EO EB SVS-- OK DC 24 V (+) (+) channel K terminals power supply K K4 5 K5 K 7 K7 8 K8 9 K9 0 K0 K K4 5 K5 K L E - control input per channel (option) S - signal output per channel L - output per channel Schematic diagram SVS-(n) control input group A group B signalisation mains power supply DC 24 V group A group B + - functional earth Fe group output (+) bridged across all channels K Kn channel: K K4 Kn This is a metric design and millimeter dimensions take precedence ( mm ) inch 05/0 257
8 Power Distribution System SVS for Example of signal group Accessories Signal output of channel K4: Insulated wire bridge (accessory) placed: [] [SB] This means that [] of K4 has been assigned to the group signal of signal group B [SBS]. [] single output [SB] signal group B [SA] signal group A K4 = 7 Insulated wire bridge Y Group connection of signal outputs () - (SA) or () - (SB) - Group connection of control inputs (option) EAS ECS EBS EAS ECS EBS SAS S SBS SAS S SBS SVS-- EA DC 24 V (+) This is a metric design and millimeter dimensions take precedence ( mm ) inch (+) K K4 K5 channel K 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 /0
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