TGRB Series Medium and High Voltage Step-down Compensation Soft Starter Cabinet

The TGRB series medium and high voltage step-down compensation soft starter cabinet adds capacitor compensation between the motor's starting step-down autotransformers, making the overall combination scientifically rational. Capacitors are paralleled in the system to provide part of the reactive power needed during the motor's starting process, thus reducing the impact of large direct starting currents on the electrical grid.

Classification:

Soft Start Class

Product Message>

1. Overview

The TGRB series medium and high voltage step-down compensation soft starter cabinets can be widely applied in fields such as steel, chemical, metallurgy, building materials, coal mining, etc., for the starting of fans, pumps, compressors, air separation units, and other large and medium-sized motors.

2. Performance Features

◆ Suitable for altitudes not exceeding 1000 meters; ambient temperature: -20 to 40°C; relative humidity not exceeding 90%;

◆ Wide range of operating voltages and powers, motor voltage: 3 to 10kV; applicable motor power: 1000 to 50000kW;

◆ Small impact on the power grid during startup, with grid voltage drop within 5 to 15%, no harmonics;

◆ During startup, grid-side current is 1.5~2.5 times the motor's rated current, providing high starting torque to meet the requirements of different loads;

◆ Equipped with a human-machine interface display, offering intuitive and simple operation with Chinese display. It allows setting of motor start times and other parameters, with the option to query historical start curves (this is an optional feature);

◆ Capable of detecting start current and voltage drop, with support of open communication and MODBUS (or PROFIBUS) communication protocols, uploading data to the DCS via RS485 interface (this is an optional feature);

◆ Small size, simple structure, easy to operate and basically maintenance free.

3. Performance Parameter Table　

Item	Functions and Indicators
Applicable motor voltage	3kV-10kV (special design for 11kV motors is required)
Applicable motor power	1000kW~50000KW
Starting current	1.5~2.5 times rated current
Running mode	After the soft start is completed, the bypass contactor is engaged
Number of starts	2-3 times/hour
Rated short-circuit withstand capacity	≤4kA
Starting power grid voltage drop	5%~15%
Starting features	The start has minimized impact on the power grid and no harmonics
Soft starting time	0~120s adjustable
Protection rating	IP40
Overall structure	Cabinet type
Monitoring	A man-machine interface is provided, and the motor start time can be set; the starting current and voltage drop can be detected
Operating environment	The altitude shall be no more than 1,000m; The upper limit is 40 ℃ (the average temperature within 24 hours shall not exceed 35 ℃), and the lower limit is -20 ℃; The relative humidity shall not exceed 90%; The installation site shall be free of conductive dust or corrosive gases.

4. Primary Scheme Diagram

5. Model Description

6. Selection Reference　　

Model	Applicable motor voltage (kV)	Applicable motor power (kW)	*Dimensions WDH (mm)*	Number of soft starter cabinets
TGRB-1000	3~10	1000~2000	110012002300	2
TGRB-2000	3~10	2000~3000	120013002300	2
TGRB-3000	3~10	3000~4000	120015002300	2
TGRB-4000	3~10	4000~5000	110012002300+80015002300	2 (4 pcs in total)
TGRB-5000	3~10	5000~6000	110013002300+80015002300	2 (4 pcs in total)
TGRB-6000	3~10	6000~7000	120015002300+80015002300	2 (4 pcs in total)
TGRB-7000	3~10	7000~8000	120015002300+100015002300	2 (4 pcs in total)
TGRB-8000	3~10	8000~9000	130015002300+100015002300	2 (4 pcs in total)
TGRB-9000	3~10	9000~10000	130015002300+100015002300	2 (4 pcs in total)
TGRB-10000	3~10	10000~15000	150016002300+100015002300	2 (4 pcs in total)
Dimensions above 10000kW depending on site conditions

7. Instructions for Ordering

◆ Users can provide the main transformer capacity, bus voltage, bus distance, minimum short-circuit capacity of the power grid, and bus power factor values when placing an order;

◆ Users need to provide the motor model and manufacturer, motor rated power, motor power factor, motor efficiency, motor rated torque, motor rotor GD2 value, motor rated voltage, motor rated current, and driving load conditions;

◆ Provide the shaft power of the loaded equipment and the rated torque of the mechanical equipment;

◆ This soft starter does not have the function of protecting the motor. The user must provide a high-voltage switchgear (or specify the high-voltage switchgear when ordering from us) as protection for the motor. Synchronous motors can match with our excitation cabinet;

◆ If users have special requirements, please contact us, and we can design separately according to the specified requirements.

Key words:

TGRB Series Medium and High Voltage Step-down Compensation Soft S

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