RSGT

RSGT
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RSGT

Product catalog summary
Overview
The RSGT is a compact, user-friendly three-phase soft starter for AC induction motors up to 90 Arms. It offers soft starting and stopping, integrated electronic overload protection (Class 10), and Modbus communication over RS485, suitable for compressors, pumps, and fans.
Key Features
  • Soft starting and stopping of AC motors.
  • Integrated electronic overload protection (Class 10).
  • Wrong phase sequence detection and torque control during ramp-down.
  • Dry run detection for pumps and serial communication via Modbus.
Benefits
  • Easy setup with only three settings: FLC, ramp-up, and ramp-down.
  • Compact design with various housing sizes based on current ratings.
  • Integrated diagnostic functions for enhanced protection.
  • Guided model selection tool for appropriate soft starter model selection.
Specifications
  • Operational voltage: 220-600 VAC with a tolerance of +10% to -15%.
  • Control voltage options: 110-400 VAC, 24 VAC/DC, 100-240 VAC.
  • Rated operational current ranges from 12 to 90 Arms.
Applications
  • Compressors: Scroll, screw, piston, and centrifugal types.
  • Pumps: Hydraulic, centrifugal, and piston types.
  • Fans: Centrifugal fans and vacuum blowers.
  • Rotating machinery: Agitators, mixers, saws, grinders, crushers, and conveyors.
Installation and Operation
  • Fast installation with a self-learning algorithm for optimal motor starts and stops.
  • Ramp-up and ramp-down settings for smooth motor operation.
  • HP mode for handling locked rotor conditions during ramp-up.
Technical Details
  • Material: PA66 with IP20 protection grade.
  • Assembly: DIN or panel mount.
  • Weight varies by model size.
  • Overvoltage category: Cat. III.
Additional Information
  • Includes a selection guide for different motor ratings and trip classes.
  • Compatible components and accessories are available for enhanced functionality.
Specifications
The document outlines specifications for RSGT soft starters, including control voltage requirements, rated insulation voltage, dielectric strength, and control input current. It specifies the control voltage range for different models and the rated AC frequency. The document also details the dielectric withstand voltage and rated impulse withstand voltage.
Procedures
The document provides procedures for connecting the RSGT soft starters, including wiring diagrams and terminal markings. It emphasizes the importance of correct phase sequence and provides troubleshooting steps for common alarms such as wrong phase sequence and line voltage out of range.
Standards and Compliance
The RSGT soft starters comply with various standards, including EN 60947-4-2:2012 and UL 60947-4-2. The document also details electromagnetic compatibility (EMC) standards for emissions and immunity, specifying the levels of electrostatic discharge, radiated radio frequency, and electrical fast transient that the devices can withstand.
Performance and Ratings
The document includes performance ratings for different RSGT models, specifying the maximum number of starts per hour at various operational currents and surrounding temperatures. It also provides current and power ratings in kW and HP for different voltage levels.
Environmental Conditions
The working temperature range for the RSGT soft starters is -20°C to +60°C, with derating applicable for temperatures above 40°C. The document specifies storage temperature, relative humidity, pollution degree, and installation altitude.
Connection Specifications
Details on connection specifications are provided, including conductor types, terminal screws, and maximum tightening torque. The document specifies the use of copper conductors and provides stripping lengths for different conductor types.
Troubleshooting and Alarms
The document outlines various alarms and their indications, such as wrong phase sequence and line voltage out of range. It provides LED status indications and relay status indications for different operational states. Troubleshooting steps are provided for each alarm, along with actions required for recovery.
Alarm Descriptions and Recovery Procedures
  • Current Unbalance Alarm: Triggered if a current unbalance > 20% is detected for > 5 seconds. Recovery is automatic after 5 minutes. Check connections on the soft starter and motor terminals.
  • Locked Rotor Alarm: Triggered if current ≥ 5xFLC for 100 msec. Recovery is automatic after 5 minutes. Ensure FLC setting matches motor nameplate current and check motor windings.
  • Dry-run Alarm: Triggered if < 50% of FLC current flows for 5 seconds. Recovery is automatic after 5 minutes. Verify FLC setting and motor load.
  • Over-temperature Alarm: Triggered if internal temperature exceeds safe limits. Recovery depends on cooling period. Ensure starts/hr and surrounding temperature are within limits.
  • Overload Alarm: Triggered if current > 1.05 x FLC during ramp-up or bypass. Recovery depends on cooling period. Check FLC setting and load blockages.
  • Supply Voltage Unbalance Alarm: Triggered if voltage difference > 20% for ≥ 5 seconds. Recovery is automatic after 5 minutes. Check voltage levels and connections.
  • Shorted Thyristor Alarm: Triggered if a thyristor is shorted. Not resettable; replace the unit.
  • Internal Fault Alarm: Triggered by internal circuitry fault. Not resettable; replace the unit.
Remote Reset of Alarms
To reset alarms via R1-R2 terminals, set alarm reset mode to MANUAL and short R1, R2 for 1 second.
Short Circuit Protection
Type 1 protection implies non-functionality post-short circuit. Suitable for circuits delivering ≤ 5,000 Amperes (10,000 for RSGT 70-90 models) with specified fuses. Refer to the table for maximum fuse ratings and model specifications.
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Catalog excerpts

RSGT-1

RSGT Three phase AC motor soft starter Benefits • Easy to use. RSGT is equipped with a self-learning algorithm that automatically adjusts the start parameters to optimise the motor starts and stops. • Fast installation and set-up. Only 3 settings are required (FLC, ramp-up and ramp-down). • Compact dimensions. 12 - 25 Arms in 45mm wide housing, 32 - 55 Arms in 75mm wide housing, 70 - 90 Arms in 120mm housing. • Integrated protection. Diagnostic functions provide additional protection. RSGT is also equipped with an overload protection (Class 10). • Less stresses on motors. The control on all the 3-phases results in better current reduction and no current imbalance during motor start. • Torque control during ramp-down. Smoother deceleration of the load. • Load condition monitoring. The RSGT is equipped with a Modbus/RTU communication port (2-wire connection). • Guided model selection. Easy to use selection tool to select the appropriate soft starter model depending on the application type. Description RSGT is an extremely compact and easy to use 3-phase soft starter for AC induction motors rated up to 90 Arms. The starting parameters can be easily set-up through 3 selector switches. The integrated motor overload protection (Class 10) and Modbus communication result in a higher installation flexibility. Applications RSGT soft starters are the ideal solution for 3-phase fixed speed AC induction motor applications where there is the need to reduce the starting current and/or minimise stresses on the motor during start and stop. The RSGT offers a number of integrated diagnostic functions that can replace additional components inside the electrical panel. Typical applications include: compressors, pumps and fans. Main functions • • • • • • • Soft starting and soft stopping of AC motors Integrated electronic overload protection (Class 10) Wrong phase sequence detection Torque control during ramp-down Top of ramp and alarm relay indication Dry run detection for pumps Serial communication (Modbus) over RS485

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RSGT-2

References Order code RSGT Enter the code entering the corresponding option instead of Code Soft starter General purpose Three phase control 90 Arms 110 - 400 VAC (+10%, - 15%) control voltage (Uc) Supply voltage: internally supplied 24 VAC/DC (+10%, - 10%) control voltage (Uc) Supply voltage: internally supplied 24 VAC/DC (+10%, - 10%) control/supply voltage Supply voltage: externally supplied 100 - 240 VAC (+10%, - 15%) control/supply voltage Supply voltage: externally supplied Rated operational current @ 40 °C With integrated motor overload protection (Class 10) Without communication With...

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RSGT-3

Selection guide Operational voltage: 400 VAC Rated operational current (Ie) 12 Arms 16 Arms Operational voltage: 600 VAC Control/supply Control/supply voltage voltage 100 - 240 VAC 24 VAC / DC RSGT6012GGV10 RSGT6012FFV10 Further reading Information RSGT 45 mm instruction manual http://cga.pub/?6ca01b RSGT 75/120 mm instruction manual RSGT troubleshooting guide RSGT 45mm Monitor software Modbus communication protocol

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RSGT-4

Selection guide and typical application settings Category Fans Feeders Rotating machinery Scroll compressor Screw compressor Piston compressor Centrifugal compressor Hydraulic pump Centrifugal pump (start time <10sec) Centrifugal pump (start time >10sec) Piston pump Vacuum blowers Screw feeder Trip Class Note: when using the RSGT on high inertia loads (Trip Class 20, 30) ensure that enough time is left between starts to allow the RSGT to cool down. For Trip Class 20 and Class 30 applications we recommend the use of an external overload protection due to the higher FLC setting that is required...

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RSGT-5

Selection guide (220 - 400 VAC) Motor FLC [A] 1.8 • * Contact Carlo Gavazzi representative for further information. • Option “E0”: 110 - 400 VAC or option “F0”: 24 VAC/DC. Selection guide (480 - 600 VAC) Motor FLC [A] • * Contact Carlo Gavazzi representative for further information. • Option “GG”: 100 - 240 VAC or option “FF”: 24 VAC/DC. Caution: the actual motor Amps may be higher or lower than the average values listed above. We suggest to use the actual motor current as listed on the motor nameplate. Use this table as a guide only.

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RSGT-6

Carlo Gavazzi compatible components Purpose Component name/code PC interface cable (Isolated USB to TTL cable) Finger guards 6 pcs per box For RSGT 75/120mm models only Rated voltage: 12 VDC Power consumption: 0.6 W

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RSGT-7

Ramp-up time selector Sets the desired motor starting time. Ramp-down time selector Sets the desired motor stopping time. Alarm. Indicates that the RSGT is in alarm. The number of flashes indicates the alarm type. Ramping/bypass. Indicates whether RSGT is in ramping (flashing) or bypass (fully ON). Note: Ramping (no HP): 2 Hz flashing. Ramping (with HP): 10 Hz flashing. Scan to link to troubleshooting guide. Sets the motor full load current (FLC). The FLC setting is used by the RSGT for the overload protection and for the maximum current allowed during motor start. Simulate overload alarm (press...

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RSGT-8

Mode of operation The RSGT series of soft starters works on two distinct self-learning algorithms depending on the ramp-up time settings. Ramp-up Ramp-down 1 to 20 seconds (for RSGT 45mm) 1 to 30 seconds (for RSGT 75/120mm) 0 seconds Mode of operation • When the ramp-up selector is in position 1 or 2, the RSGT will follow a self-learning current limit algorithm. • As soon as A1-A2 (or ST for RSGT60 models) control voltage signal is applied, the RSGT will start to ramp-up the motor. • At the very first start the current limit will be 4 x FLC setting. • In the subsequent starts, the RSGT will automatically...

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RSGT-9

Features General RSGT 45 mm Protection grade Overvoltage category

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RSGT-12

Power Supply Operational voltage range Supply current at Idle Blocking voltage Rated insulation voltage Dielectric withstand voltage: Supply to input Supply to heatsink Integrated varistor Control voltage range (Uc) Maximum pick-up voltage Minimum drop out voltage Supply voltage range (Us) Rated insulation voltage (Ui) Dielectric strength: Dielectric withstand voltage Rated impulse withstand voltage Control input current Input to output response time (Mains supply already present) Input to output response time (Mains supply applied with control) Integrated varistor Note 1: for the Canadian application,...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.