RSBT4855CVC Carlo Gavazzi

RSBT4855CVC, Soft Starter Soft Starter of Two and 3 Phase Scroll Compressors RSBD48 Models. CV (biphasic), RSBT48.. CV (three-phase), RSBT4855CVC, RSBDyRSBTson soft starters for Scroll compressors up to 95A rated current. They are equipped with an adaptive algorithm that makes the starter automatically adapt to the compressor it is controlling, ensuring an optimal reduction of the irruption intensity. RSBD controls two phases and RSBT controls 3 phases with integrated bypass relays to bridge semiconductors after the up ramp. The equipment is supplied in a DIN rail box or for panel mounting (accessories included). The RSB series starters also include two switched relays for bypass and alarm indication. The maximum operating temperature is 75°C (with a deviation from 40°C). RSB versions. CVC are equipped with serial communication port "Modbus RTU" for start/stop and communication of relevant instant variables that can be transmitted to the host control system., RSBT4855CVC, Automatic Adaptive Algorithm (patented) The RSBD and RSBT series of soft starters include an innovative automatic adaptive algorithm (patented) that ensures optimal start-up intensity at each compressor start.. This feature is active at every compressor start.. The soft starter automatically sets the appropriate parameters to perform an optimal reduction of the inrush current, while maintaining an upward ramp time of <1s. In case of rotor lock alarm/up ramp time, the parameters set by default are automatically reset. During successive compressor starts-ups, the automatic adaptive function will be activated by optimizing these parameters automatically once again. Specific operating mode of HP RSB., RSBD and RSBT starters must attempt a soft start of the compressor within the specified intensity range. Depending on the load requirements, the intensity limit will gradually increase to a default maximum intensity limit, then RSB. , RSBD and RSBT will go into bypass mode. If the ramp does not run after a maximum of 1 second, the incomplete ramp alarm will be triggered (5 red LED flashes) and the RSB., RSBD and RSBT starters will go into recovery mode for 5 min. If with the second consecutive attempt, RSB., RSBD and RSBT trigger the incomplete ramp alarm again, user intervention will be necessary to zero the RSB power..., as it may indicate a real blocked rotor condition. Self-adaptive balancing of intensity (for RSBD models) RSBD soft starters use a two-phase control strategy with two anti-parallel thyristors via L1-T1 and L3-T3. The L2-T2 phase is the uncontrolled phase. During each start, the RSBD soft starter measures a number of parameters and dynamically adjusts the starting parameters to reduce the intensity imbalance in the L2-T2 phase, obtaining a smoother start of the engine.