BA9026

Power Electronics Softstarter with softstop BA 9026 ministart • • • • • • • • • • • • • 0223497 Increases the life of squirrel cage motors and mechanical drives Easily fitted to existing installations 3-phase control softstart and softstop For motors up to 3 kW Start current limited to 2 to 3 times rated motor current Semiconductors bridged after softstart Adjustable ramp time, starting torque and deceleration time LED indication DIN rail mounted Galvanic isolation of control input and auxiliary power supply Integrated overtemperature monitoring Wide motor voltage range 200 to 460 V AC Width 45 mm Function diagram Approvals and marking X1 / X2 L1 / L2 / L3 Applications • • • • • Motor with gear, belt or chain drive Fans, pumps, conveyor systems, compressors Packaging machines, door-drives Start current limiting on 3-phase motors Reduces on off current on transformers and P.S.U's Function Softstarts are electronic devices designed to enable 1-phase or 3-phase induction motors to start smoothly. The BA 9026 slowly ramps up the current on three phases, therefore allowing the motor torque to build up slowly. This reduces the mechanical stress or the machine and prevents damage to conveyed material. When the motor is up to full speed the semiconductors in BA 9026 are bridged to prevent internal power losses and heat build up to addition BA 9026 allows a softstop function prolonging the stop time of the motor preventing high counter torques from abruptly stopping the motor. Indication LED green LED yellow LED red ON ON ON = = = power connected power semiconductors bridged overtemperature A1 / A2 T1 / T2 / T3 M Mot n t0 t 0 : start t0-t1 : ramp up time t2-t 3 : ramp down time t1 t2 t3 t M7038_a Principle of operation Block diagram For direct on line or star delta applications, terminals L1, L2, L3 are connected to the mains contactor, with the motor connected to terminals T1, T2, T3. A 24 V DC auxiliary supply is connected to terminals A1, A2 and a 24 V DC control signal connected to terminals X1-X2. When power is connected to terminals L1, L2, L3 and 24 V DC is present at terminals X1-X2, the softstart will commence. Potentiometer "tan " (0,5-5s) adjustst the ramp time (time motor takes to get to full speed) and potentiometer "Man" adjusts the start voltage (50-80 % nomV). When the softstart is complete the internal semiconductors are automatically bridged. When 24 V DC is removed from terminals X1-X2, the softstop function will commence for the deceleration time period set on potentiometer "tab" (0,5-5s) and deceleration voltage level set on potentiometer "Mab " (30-80 % nomV). Notes Motor load must always be connected as continuous operation of the softstart with no load may cause overheating of the motor and softstart. It is recomended that the softstart is protected by superfast semiconductor fuses rated as per the current rating of the softstart of motor. However, standard line and motor protection is acceptable, but for high starting frequencies motor winding temperature monitoring is recommended. All technical data in this list relate to the state at the moment of edition. We reserve the right for technical improvements and changes at any time. 1 BA 9026 / 12.11.02 d Technical data Nominal voltage: Nominal frequency: Rated current: Nominal motor power PN at 400 V: 200 V: Min. motor power: Start torque: Ramp time: Deceleration time: Recovery time: Switching frequency: Auxiliary voltage A1/A2: Power consumption: Residual ripple: Control input Voltage range X1+/X2: Softstart: Softstop: General data Temperature range: Storage temperature: Testing voltage: Degree of protection: Climate resistance: Wire connection: Mounting: Weight: Dimensions Width x height x depth: Standard type BA 9026 3 AC 200 ... 460 V 50/60 Hz 3 kW Article number: 0046450 • Nominal voltage: 3 AC 200 ... 460 V • Nominal motor power: 3 kW • Width: 45 mm Ordering example BA 9026 3AC 200 ... 460 V 50/60 Hz 3 kW Nominal frequency Nominal motor power Nominal voltage Type Installation This units must be mounted on a vertical mounting area with the connections in a vertical plane, i.e. top to bottom. Ensure that no external heat source is placed below the unit and a 40 mm air gap is maintained above and below. Other devices may be directly mounted either side of the unit. Control input If a voltage of more than 13 V DC is connected to terminals X1+/X2, the device begins with softstart. If the voltage falls below 5 V DC the device will softstop. stock item 45 x 74 x 121 mm 0 ... + 55 ° C -25 ... + 75 °C 2,5 kV Housing: IP 40 IEC/EN 60 529 Terminals: IP 20 IEC/EN 60 529 0 / 055 / 04 IEC/EN 60 068-1 up to 2,5 mm2 stranded ferruled DIN-rail mounting 300 g DC: 0 ... 28,8 V > 13 V I> I> S1 L1 L2 A1 X1 L3 (+) (+) BA9026 T1 U M 3 T2 V T3 W M6436_a A2 X2 Softstart and softstop E. DOLD & SÖHNE KG • D-78114 Furtwangen e-mail dold-relays@t-online.de • internet http://www.dold.com • Postf. 1251 • Tel. +49 7723 654 0 • Telefax +49 7723 654 356 2