Presentation Soft starters 5 6 7 65_Ver.-EN.fm/
Presentation (continued) Soft starters Applications The Altistart 8 soft start - soft stop unit is a controller with 6 thyristors which is used for the torque-controlled soft starting and stopping of three-phase squirrel cage asynchronous motors in the power range between and kw. It offers soft starting and deceleration functions along with machine and motor protection functions as well as functions for communicating with control systems. These functions are designed for use in state-of-the-art applications in centrifugal machines, pumps, fans, compressors and conveyors, which are primarily to be found in the construction, food and beverages and chemical industries. The highperformance algorithms of the Altistart 8 contribute significantly to its robustness, safety and ease of setup. The Altistart 8 soft start - soft stop unit is a cost-effective solution which can: # Reduce machine operating costs by reducing mechanical stress and improving machine availability # Reduce the stress placed on the electrical distribution system by reducing line current peaks and voltage drops during motor starts The Altistart soft start - soft stop unit offer comprises ranges: # Three-phase voltages to 5 V, 5/6 Hz # Three-phase voltages 8 to 69 V, 5/6 Hz In each voltage range, the Altistart soft start - soft stop units are dimensioned for standard and severe applications. Functions The Altistart 8 soft start - soft stop unit ( ) is supplied ready for use in a standard application with motor protection class (see page 656/5). It comprises a built-in terminal ( ) which can be used to modify programming, adjustment or monitoring functions in order to adapt and customise the application to meet individual customer requirements. # Drive performance functions: 5 Exclusive Altistart torque control (patented by ) 5 Constant control of the torque supplied to the motor during acceleration and deceleration periods (significantly reducing pressure surges) 5 Facility for adjusting the ramp and the starting torque 5 The starter can be bypassed using a contactor ( ) at the end of the starting period whilst maintaining electronic protection (bypass function) 5 Wide frequency tolerance for generator set power supplies 5 The starter can be connected to the motor delta terminals in series with each winding # Machine and motor protection functions: 5 Built-in motor thermal protection 5 Processing of information from PTC thermal probes 5 Monitoring of the starting time 5 Motor preheating function 5 Protection against underloads and overcurrents during continuous operation # Functions facilitating the integration of the unit into control systems: 5 logic inputs, logic outputs, relay outputs and analogue output 5 Plug-in I/O connectors 5 Function for configuring a second motor and easy-to-adapt settings 5 Display of electrical values, the state of the load and the operating time 5 RS 85 serial link for connection to Modbus Options A remote terminal ( ) can be mounted on the door of a wall-fixing or floor-standing enclosure. PowerSuite advanced dialogue solutions: # PowerSuite Pocket PC with PPC type terminal ( 5 ), # PowerSuite software workshop ( 6 ). A range of wiring accessories for connecting the starter to PLCs via a Modbus connection ( 7 ). Bus communication and Ethernet, Fipio, DeviceNet and Profibus DP network communication options Characteristics: pages 65/ to 65/5 pages 65/ to 65/5 pages 65/ to 65/5 pages 65/ to 65/7 65_Ver.-EN.fm/
Characteristics Soft starters Environment Conformity to standards The electronic starters have been developed and performance tested in accordance with international standards, in particular with the starter product standard EN/IEC 697--. &marking Products have CE marking in accordance with the harmonised standard EN/IEC 697--. Product approvals UL, CSA Pending: DNV, C-Tick, Ghost, CCIB Degree of protection Starters ATS 8D7/ to 8C/ IP (IP in the absence of connections) Starters ATS 8C/ to 8M/ IP () Vibration resistance Conforming to IEC 668--6.5 mm from to Hz gn from to Hz Shock resistance Conforming to IEC 668--7 5 g for ms Starter noise level () Starters ATS 8D/ to D7/ dba 5 Starters ATS 8D6/ to C/ dba 58 Starters ATS 8C/ to C7/ dba 5 Starters ATS 8C/ to C/ dba 5 Starters ATS 8C/ to C66/ dba 55 Starters ATS 8C79/ to M/ dba 6 Fans Starters ATS 8D7/ and D/ Natural convection Starters ATS 8D/ to M/ Forced convection. The fans are activated automatically when a temperature threshold is reached. For flow rate see page 65/5. Ambient temperature around the unit Operation C -...+ without derating (between + and + 6, derate the nominal current of the Altistart by % for each C). Storage, conforming to C - 5...+ 7 IEC 697-- Maximum relative humidity Conforming to IEC 668-- 95% without condensation or dripping water Maximum ambient pollution Conforming to IEC 666- Level Maximum operating altitude m without derating (above this, derate the nominal current of the Altistart by.% for each additional m). Limit to m. Operating position Maximum permanent angle in relation to the normal vertical mounting position Electrical characteristics Operating category Conforming to IEC 697-- AC-5a Three-phase supply voltage Starters ATS 8///Q V -5% to 5 + % Starters ATS 8///Y V 8-5% to 69 + % Frequency Hz 5/6 ± 5% (automatic) 5 or 6 ± % (must be set) Nominal starter current Starters ATS 8///Q A 7... Starters ATS 8///Y A 7 to Motor power Starters ATS 8///Q kw to 6 Starters ATS 8///Y kw/hp 5.5 to 9/5 to Voltage indicated on the motor rating plate Starters ATS 8///Q V to 5 Starters ATS 8///Y V 8 to 69 Starter control circuit supply voltage Starters ATS 8///Q V - 5% to 5 + %, 5/6 Hz Starters ATS 8///Y V - 5% to + %, 5/6 Hz Maximum control circuit consumption (with fans operating) Relay output ( configurable outputs) Starters ATS 8D7/ to C7/ W Starters ATS 8C/ to C/ W 5 Starters ATS 8C/ to M/ W 8 relay outputs (R, R, R), normally open contacts "N/O" Minimum switching capacity: ma for $6 V. Maximum switching capacity on inductive load:.8 A for " V and $ V (cos ϕ=.5 and L/R=ms). Maximum nominal operating voltage " V. Factory setting: R assigned as the "fault relay" (configurable) R assigned as the "end of starting relay" to control the starter bypass relay R assigned as "motor powered" (configurable) () Protective covers can be fitted to the power terminals of ATS 8C/ to C/ starters. ATS 8C/ to 8M/ starters have protection on the front panel and on the sides. () Starters located m away. The noise levels may change depending on the characteristics of the fans. pages 65/ and 65/ pages 65/ to 65/5 pages 65/ to 65/5 pages 65/ to 65/7 65_Ver.-EN.fm/
Characteristics (continued) Soft starters Electrical characteristics (continued) Logic inputs LI ( configurable inputs) logic inputs, impedance. kω, isolated: Stop, Run, LI, LI. + V power supply (maximum V) I max. 8 ma State if U < 5 V and I < ma State if U > V and I > 5 ma Internal source available x + V output, isolated and protected against short-circuits and overloads. Accuracy ± 5%. Max. current ma. Logic outputs LO (configurable) logic outputs LO and LO with V common, compatible with level PLC, according to standard IEC 65A-68. + V power supply (minimum: + V, maximum: + V). Maximum output current: ma if supplied externally Analogue output AO (configurable) Current output - ma or - ma Maximum load impedance: 5 Ω Accuracy ± 5% of the maximum value Input for PTC probe Total resistance of probe circuit 75 Ω at 5 C, according to IEC 6 78-A Maximum I/O connection capacity.5 mm (AWG ) Communication RS 85 multidrop serial link integrated in the starter, for Modbus, with RJ5 type connector Transmission speed 8, 96 or 9 bps Maximum number of Altistart 8 connected: 8 Other uses: - connection to a remote terminal or - connection to a PC or - connection to other buses and networks via communication options. Protection Thermal Built-in, starter and motor (calculated and/or thermal protection with PTC probes) Line protection Phase failure, indicated by output relay Current settings The nominal motor current In can be adjusted from. to. times the starter nominal current. Adjustment of the maximum starting current from.5 to 7 times the motor In, limited to 5 times the starter nominal current. Starting mode By torque control with starter current limited to 5 In maximum. Factory setting: In for standard operation on 5 s torque ramp Stopping mode Freewheel stop "Freewheel" stop (factory setting) Controlled stop on torque ramp Programmed between.5 and 6 s (for pump applications) Braked stop Controlled dynamically by the flux Electromagnetic compatibility EMC () Standards Test levels Examples (sources of interference) Summary of immunity tests carried out with the Altistart 8 IEC 6-- level Electrostatic discharge: - by contact - in the air IEC 6-- level Radiated electromagnetic fields IEC 6-- level Rapid electrical transients: - power supply cables - control cables IEC 6--5 level Shock wave: - phase/phase - phase/earth IEC 6-- level Damped oscillating waves 6 kv 8 kv Contact off an electrically charged individual V/m Equipment transmitting radio frequencies kv kv kv kv Opening/closing of a contactor Oscillating circuit on the line supply kv - M Hz Radiated and conducted emissions According to IEC 697--, class A, on all starters According to IEC 697--, class B, on starters up to 7 A: ATS 8D7/ to 8C7/. Must be bypassed at the end of starting () The starters conform to product standard IEC 697--, in particular with regard to EMC. This standard ensures a level of immunity for products and a level of emitted interference. In steady state, the interference emitted is below that required by the standard. During acceleration and deceleration phases, low level loads may be affected by low frequency interference (harmonics). To reduce this interference, connect chokes between the line supply and the Altistart 8 (see page 658/). Note: # Power factor correction capacitors can only be used upstream of the Altistart and only powered up at the end of starting. # The starter must be earthed to conform to the regulations concerning leakage currents (6 ma). When the use of an upstream "residual current device" for protection is required by the installation standards, an A-Si type device must be used. Check its compatibility with the other protective devices. If the installation involves several starters on the same line supply, each starter must be earthed separately. - pages 65/ and 65/ pages 65/ to 65/5 pages 65/ to 65/5 pages 65/ to 65/7 65_Ver.-EN.fm/
Characteristics (continued) Soft starters Torque characteristics Curves indicating changes in the torque depending on the starting current of a threephase asynchronous motor. Curves : direct line starting Curves : starting in current limiting mode Torque curve Ts indicates the total torque range available depending on the limiting current Is. Limiting the starting current Is to a preset value Is will reduce the starting torque Ts to a value which is almost equal to the square of currents Is/Is. Example: For motor characteristics: Ts = Tn for Is = 6 In, limit the current to Is = In (.5 Is) resulting in a starting torque Ts = Ts x (.5)² = Tn x.5 =.75 Tn Starting current Direct line starting current Starting current limited to Is I/In 6 5 Id,5,5,75 Starting torque Direct line starting torque Starting torque with current limited to Is C/Cn 6 5 Cd Cr,5,5,75 pages 65/ and 65/ pages 65/ to 65/5 pages 65/ to 65/5 pages 65/ to 65/7 65_Ver.-EN.fm/
Characteristics (continued) Soft starters Conventional starting using current limitation or voltage ramp With current limitation Is, the accelerating torque applied to the motor is equal to the motor torque Ts minus the resistive torque Tr. The accelerating torque increases in the starting range as the speed changes and is at its highest at the end of acceleration (curve ). This characteristic means that the load is taken up very abruptly, which is not recommended for pump type applications. Example of speed curve for starting with current limitation Current applied to the motor (I/In) Motor speed I/In,5 Starting with the Altistart 8 Example of speed curve for starting with torque control Current applied to the motor (I/In) Motor speed Torque control on the Altistart 8 applies the torque to the motor during the entire starting phase if the current required (curve ) does not exceed the limiting current. The accelerating torque can be virtually constant over the entire speed range (curve ). It is possible to set the Altistart in order to obtain a high torque on starting for a rapid motor speed rise whilst limiting its temperature rise, and a lower accelerating torque at the end of starting for gradual loading. This control function is ideal for centrifugal pumps or for machines with high resistive torque on starting. I/In t,5 Stopping with the Altistart 8 # Freewheel stop: the motor comes to a freewheel stop. # Decelerated stop: this type of stop is ideal for pumps and can be used to effectively reduce pressure surges. Torque control on the Altistart 8 reduces the effect of hydraulic transients even if the load increases. This type of control makes adjustment easy. # Braked stop: this type of stop is suitable for high inertia applications as it reduces the stopping time of the machine. t pages 65/ and 65/ pages 65/ to 65/5 pages 65/ to 65/5 pages 65/ to 65/7 65_Ver.-EN.fm/5