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RSBT4855CVC – 3 PH COMP. SOFT START 220-480V 3P MODBUS
Carlo Gavazzi RSBT4855CVC three-phase soft starter, a 55 A motor starting controller with Modbus communication designed for scroll compressors and industrial motors.
£914.28
Why Choose the Carlo Gavazzi RSBT4855CVC Soft Starter?
The Carlo Gavazzi RSBT4855CVC is an advanced three-phase soft starter designed for smooth acceleration and controlled starting of scroll compressors and industrial motors. As part of the high-performance Carlo Gavazzi RSBT soft starter series, it provides reduced starting current, improved motor protection and reliable operation in HVAC, refrigeration and industrial automation systems.
This soft starter uses electronic motor control technology with three-phase control to reduce electrical and mechanical stress during motor startup. The integrated bypass function minimises heat generation during normal operation, while the DIN rail and panel mounting options allow flexible installation inside industrial control cabinets.
With a rated operating current of 55 A AC, an operating voltage range of 187–528 V AC and a 24 V AC/DC and 110–400 V AC control supply, the RSBT4855CVC is suitable for three-phase motors up to 22 kW at 400 V AC. It also includes RS-485 Modbus communication and relay outputs for integration into modern automation systems.
Key Advantages
- Advanced three-phase soft starter designed for scroll compressors and industrial motors.
- 55 A rated operating current for higher-power motor applications.
- Reduced motor starting current compared with direct-on-line starting.
- Integrated bypass function improves efficiency during normal motor operation.
- RS-485 Modbus communication enables automation system integration.
- DIN rail and panel mounting capability for flexible installation.
Key Features
- Carlo Gavazzi RSBT soft starter series.
- Three-phase motor control with three controlled phases.
- 55 A rated operating current.
- 187–528 V AC operating voltage range.
- 24 V AC/DC and 110–400 V AC control supply.
- Integrated bypass relay for efficient operation.
- RS-485 Modbus RTU communication interface.
- Two relay outputs for status and alarm monitoring.
- DIN rail / panel mounting format.
Reliable Motor Starting for Industrial Applications
Soft starters such as the Carlo Gavazzi RSBT4855CVC gradually control motor starting conditions to reduce current peaks, mechanical shock and stress on connected equipment. This improves system reliability and helps extend the service life of motors and compressors.
The RSBT series is designed for OEM machine builders, HVAC engineers and industrial automation specialists requiring dependable motor starting solutions. Its integrated bypass, communication capability and flexible mounting options allow seamless integration into modern control systems.
Typical Applications
- Three-phase scroll compressors.
- HVAC and refrigeration systems.
- Industrial motor control panels.
- OEM machinery and automation systems.
- Pumps and motor-driven equipment.
- Industrial applications requiring reduced starting current.
Technical Specifications
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| Motor Protection | No | |
|---|---|---|
| Current | 55 A | |
| Voltage | 230 V, 400 V, 480 V | |
| Phase | Three Phase | |
| Coil / Supply Voltage | 110–400 V AC, 24 V AC/DC | |
| Manufacturer | Carlo Gavazzi | |
| Series | RSBT | |
| Model | RSBT4855CVC | |
| Product type | Three-phase soft starter | |
| Application | Scroll compressors and industrial motor starting | |
| Rated operating current | 55 A AC | |
| Operating voltage | 187–528 V AC | |
| Motor power at 230 V | up to 15 kW | |
| Motor power at 400 V | up to 22 kW | |
| Control supply voltage | 24 V AC/DC and 110–400 V AC | |
| Number of phases | 3-phase | |
| Controlled phases | 3 | |
| Internal bypass | Yes | |
| Communication | RS-485 Modbus | |
| Relay outputs | 2 | |
| Protection rating | IP20 | |
| Mounting type | DIN rail / panel mounting | |
| Dimensions (W × H × D) | 120 × 150 × 150 mm | |
| Weight | approx. 2.8 kg |
Frequently Asked Questions
What is the Carlo Gavazzi RSBT4855CVC used for?
The RSBT4855CVC is a three-phase soft starter designed for controlled starting of scroll compressors and industrial motors.
What motor power can the RSBT4855CVC handle?
The soft starter supports three-phase motors up to approximately 22 kW at 400 V AC.
What voltage does the RSBT4855CVC operate from?
The unit operates from a 187–528 V AC three-phase supply with a 24 V AC/DC and 110–400 V AC control supply.
Does the RSBT4855CVC include communication features?
Yes, the RSBT4855CVC includes RS-485 Modbus communication for integration with compatible automation systems.
How is the RSBT4855CVC installed?
The RSBT4855CVC supports DIN rail and panel mounting inside industrial control cabinets.
Trusted by Industrial Automation Engineers
Carlo Gavazzi RSBT soft starters provide reliable motor starting control for industrial automation, HVAC and compressor applications requiring efficient and controlled acceleration.
