TBRQ+SVG Variable-Frequency Soft Starter with Reactive Power Compensation Cabinet

The TBRQ+SVG variable-frequency soft starter with reactive power compensation cabinet is a comprehensive, intelligent motor-control device independently developed by Xiangyang Tenghui Electrical Manufacturing Co., Ltd. At its core, the device employs a high-speed DSP chip for control and utilizes “high-to-high” technology—direct high-voltage input and direct high-voltage inverter output—and integrates series-connected multi-level power-unit technology. This equipment seamlessly combines multiple functions, including soft starting, dynamic reactive-power compensation, voltage regulation, and harmonic mitigation, with each performance metric surpassing that of conventional equipment. It is a truly high-performance, multifunctional, and integrated intelligent solution.

Classification:

Soft Start Class

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I. Overview

The TBRQ+SVG variable-frequency soft starter with reactive power compensation cabinet is a comprehensive, intelligent motor-control device independently developed by Xiangyang Tenghui Electrical Manufacturing Co., Ltd. At its core is a high-speed DSP chip, and it employs “high–high” topology—direct high-voltage input and direct high-voltage inverter output—and integrates series-connected multi-level power-unit technology. This device seamlessly combines soft starting, dynamic reactive-power compensation, voltage regulation, and harmonic mitigation, with each performance parameter surpassing that of conventional equipment. It is a truly high-performance, multifunctional, integrated smart solution.

The high-voltage TBRQ+SVG variable-frequency starting cabinet features a high power factor, high reliability, high efficiency, low harmonic distortion, low losses, easy maintenance, and a compact footprint, making it a truly intelligent motor control device that significantly enhances grid stability and reliability while improving the overall grid environment.

After employing this device, the motor’s inrush current is limited to no more than twice its rated current, and the power factor can be stabilized at or above 0.99. It is suitable for a wide range of applications, including power systems, industrial settings, high-speed rail and urban rail transit, wind and solar power generation, telecommunications, and data centers.

The system can also incorporate SVG functionality; upon startup, users can select the “SVG Function” to perform power-factor correction for the cabinet’s grid, achieving a power factor of 0.95 or higher.

II. Model Naming for TBRQ+SVG Variable-Frequency Soft Starter with Reactive Power Compensation Cabinet

III. Performance Parameter Table for TBRQ+SVG Variable-Frequency Soft Starter with Reactive Power Compensation Cabinet

Project		Functions and Parameters
Input	Rated Voltage/Frequency	Three-phase: 3 kV / 3.3 kV / 6 kV / 6.6 kV / 10 kV / 11 kV, 50 Hz / 60 Hz
Input	Permitted Scope	Voltage fluctuation range: −20% to +15%, with a transient tolerance of −30%; frequency: ±5%.
Output and Basic Specifications	Run Command Channel	Setpoints can be configured via the HMI, control terminals, or communication interfaces, with switching between these methods possible through terminal selection.
	Performance Features	Starting and switching current: The starting and switching current shall not exceed 1.5 times the motor’s rated current. Starting power factor: ≥0.99. Start-up time: adjustable from 10 to 60 seconds. Seamless switching: After the variable-frequency start-up frequency rises to 50 Hz, the system automatically switches to line frequency. Built-in pre-charge function: prevents excessive inrush current during transformer energization, which could trip the upstream switchgear. The power units are configured in a cascaded topology, allowing for interchangeability and easy disassembly. Chinese/English HMI optional SVG Function: Can compensate the power factor of a single motor to 0.95 or higher.
	Frequency-Defined Channel	Human-machine interface, communication, AI1, AI2, AI3
	Auxiliary frequency setting	Implement flexible auxiliary frequency fine-tuning and reference frequency synthesis.
	Analog Input	Three-channel analog signal input, with options for voltage- or current-type signals; supports both positive and negative inputs.
	Analog Output	Four-channel analog signal output, with selectable ranges of 0–4 to 20 mA or 0–2 to 10 V, programmable.
	Digital Input	8-channel optional multi-function digital inputs
	Digital Output	2-channel multifunction digital output; 3-channel multifunction relay output
	Communications	Built-in RS485 communication interface, supporting Modbus-RTU protocol and Profibus-DP (optional).
Protection function		Overcurrent, overvoltage, undervoltage, phase loss at input or output, output short circuit, output ground fault, overheating, motor overload, external fault, analog input disconnection, stall prevention, and overheat protection for motor PTC or Pt100, among others.
Optional accessories		One-to-one automatic bypass cabinet, one-to-two automatic bypass cabinet, one-to-three automatic bypass cabinet, communication module, human-machine interface
Environment	Place of Use	Altitude below 2,000 meters, indoor environment, protected from direct sunlight, and free from dust, corrosive gases, flammable gases, oil mist, water vapor, dripping water, salt spray, and similar conditions.
	Operating environment temperature/humidity	−10 to +40°C / 20% to 90% RH, no condensation
	Vibration	Less than 5.9 m/s² (0.6 g)
Structure	Protection Level	IP30 or higher
Structure	Cooling method	Forced air cooling with fan control

IV. Basic Principles

The structure of the TBRQ+SVG series high-voltage variable-frequency soft-start cabinet system is shown in the figure above and consists of a phase-shifting transformer, power-unit controllers, and bypass vacuum contactors. The 3 kV series comprises 9 (or 12 for the plateau version) power units, with three (or four) power units connected in series to form one phase. The 6 kV series includes 15 (or 24 for the plateau version) power units, with five (or eight) power units connected in series to form one phase, while the 10 kV series features 24 (or 30) power units, with eight (or ten) power units connected in series to form one phase.

V. Model Specifications

5.1 3 kV class

Soft-start cabinet model	Rated capacity (kVA)	Rated Output Current (A)	Motor adaptation (kW)	Soft-start cabinet model	Rated capacity (kVA)	Rated Output Current (A)	Motor adaptation (kW)
TBRQ+SVG-03-160	200	39	160	TBRQ+SVG-03-800	1000	192	800
TBRQ+SVG-03-200	250	49	200	TBRQ+SVG-03-900	1125	216	900
TBRQ+SVG-03-220	275	54	220	TBRQ+SVG-03-1000	1250	240	1000
TBRQ+SVG-03-250	315	61	250	TBRQ+SVG-03-1120	1400	276	1120
TBRQ+SVG-03-280	350	68	280	TBRQ+SVG-03-1250	1563	308	1250
TBRQ+SVG-03-315	400	77	315	TBRQ+SVG-03-1400	1750	345	1400
TBRQ+SVG-03-355	450	86	355	TBRQ+SVG-03-1600	2000	395	1600
TBRQ+SVG-03-400	500	96	400	TBRQ+SVG-03-1800	2250	443	1800
TBRQ+SVG-03-450	560	108	450	TBRQ+SVG-03-2000	2500	493	2000
TBRQ+SVG-03-500	630	120	500	TBRQ+SVG-03-2240	2800	552	2240
TBRQ+SVG-03-560	700	135	560	TBRQ+SVG-03-2500	3150	616	2500
TBRQ+SVG-03-630	800	154	630	TBRQ+SVG-03-2800	3500	690	2800
TBRQ+SVG-03-710	900	171	710	TBRQ+SVG-03-3150	4000	778	3150

5.2 6 kV class

Soft-start cabinet model	Rated capacity (kVA)	Rated Output Current (A)	Motor adaptation (kW)	Soft-start cabinet model	Rated capacity (kVA)	Rated Output Current (A)	Motor adaptation (kW)
TBRQ+SVG-06-160	200	20	160	TBRQ+SVG-06-1120	1400	138	1120
TBRQ+SVG-06-200	250	25	200	TBRQ+SVG-06-1250	1600	154	1250
TBRQ+SVG-06-220	275	28	220	TBRQ+SVG-06-1400	1750	173	1400
TBRQ+SVG-06-250	315	31	250	TBRQ+SVG-06-1600	2000	198	1600
TBRQ+SVG-06-280	350	35	280	TBRQ+SVG-06-1800	2250	222	1800
TBRQ+SVG-06-315	400	39	315	TBRQ+SVG-06-2000	2500	247	2000
TBRQ+SVG-06-355	450	44	355	TBRQ+SVG-06-2240	2800	277	2240
TBRQ+SVG-06-400	500	50	400	TBRQ+SVG-06-2500	3150	309	2500
TBRQ+SVG-06-450	560	56	450	TBRQ+SVG-06-2800	3500	346	2800
TBRQ+SVG-06-500	630	62	500	TBRQ+SVG-06-3150	4000	384	3150
TBRQ+SVG-06-560	700	69	560	TBRQ+SVG-06-3550	4500	439	3550
TBRQ+SVG-06-630	800	78	630	TBRQ+SVG-06-4000	5000	495	4000
TBRQ+SVG-06-710	900	88	710	TBRQ+SVG-06-4500	5600	557	4500
TBRQ+SVG-06-800	1000	99	800	TBRQ+SVG-06-5000	6300	619	5000
TBRQ+SVG-06-900	1125	111	900	TBRQ+SVG-06-5600	7000	693	5600
TBRQ+SVG-06-1000	1250	123	1000	TBRQ+SVG-06-6300	7900	780	6300

5.3 10 kV class

Soft-start cabinet model	Rated capacity (kVA)	Rated Output Current (A)	Motor adaptation (kW)	Soft-start cabinet model	Rated capacity (kVA)	Rated Output Current (A)	Motor adaptation (kW)
TBRQ+SVG-10-200	250	15	200	TBRQ+SVG-10-1600	2000	115	1600
TBRQ+SVG-10-250	315	19	250	TBRQ+SVG-10-1800	2250	130	1800
TBRQ+SVG-10-280	350	21	280	TBRQ+SVG-10-2000	2500	144	2000
TBRQ+SVG-10-315	400	24	315	TBRQ+SVG-10-2240	2800	162	2240
TBRQ+SVG-10-355	450	27	355	TBRQ+SVG-10-2500	3150	182	2500
TBRQ+SVG-10-400	500	30	400	TBRQ+SVG-10-2800	3500	205	2800
TBRQ+SVG-10-450	560	34	450	TBRQ+SVG-10-3150	4000	230	3150
TBRQ+SVG-10-500	630	38	500	TBRQ+SVG-10-3550	4500	260	3550
TBRQ+SVG-10-560	700	42	560	TBRQ+SVG-10-4000	5000	290	4000
TBRQ+SVG-10-630	800	47	630	TBRQ+SVG-10-4500	5600	324	4500
TBRQ+SVG-10-710	900	53	710	TBRQ+SVG-10-5000	6300	360	5000
TBRQ+SVG-10-800	1000	60	800	TBRQ+SVG-10-5600	7000	403	5600
TBRQ+SVG-10-900	1125	68	900	TBRQ+SVG-10-6300	7900	454	6300
TBRQ+SVG-10-1000	1250	75	1000	TBRQ+SVG-10-7100	8900	510	7100
TBRQ+SVG-10-1120	1400	84	1120	TBRQ+SVG-10-8000	10000	580	8000
TBRQ+SVG-10-1250	1600	94	1250	TBRQ+SVG-10-9000	11250	653	9000
TBRQ+SVG-10-1400	1750	105	1400	TBRQ+SVG-10-10000	12500	725	10000

VI. The external dimensions and weight are as follows:

6.1 3kV class

Soft-start cabinet model	L	W	H	Weight (kg)	Soft-start cabinet model	L	W	H	Weight (kg)
TBRQ+SVG-03-160	3200	1000	2200	2500	TBRQ+SVG-03-800	4200	1300	2300	4100
TBRQ+SVG-03-200	3200	1000	2200	2550	TBRQ+SVG-03-900	4200	1300	2300	4300
TBRQ+SVG-03-220	3200	1000	2200	2600	TBRQ+SVG-03-1000	4200	1300	2300	4400
TBRQ+SVG-03-250	3200	1000	2200	2680	TBRQ+SVG-03-1120	4200	1300	2300	4550
TBRQ+SVG-03-280	3200	1000	2200	2750	TBRQ+SVG-03-1250	4600	1300	2300	4700
TBRQ+SVG-03-315	3200	1000	2200	2830	TBRQ+SVG-03-1400	4600	1300	2300	4950
TBRQ+SVG-03-355	3500	1000	2200	3000	TBRQ+SVG-03-1600	4600	1300	2300	5200
TBRQ+SVG-03-400	3500	1000	2200	3200	TBRQ+SVG-03-1800	4600	1300	2300	5500
TBRQ+SVG-03-450	3500	1200	2200	3300	TBRQ+SVG-03-2000	4900	1300	2300	5800
TBRQ+SVG-03-500	3500	1200	2200	3500	TBRQ+SVG-03-2240	4900	1300	2300	6200
TBRQ+SVG-03-560	3500	1200	2200	3650	TBRQ+SVG-03-2500	4900	1400	2300	6500
TBRQ+SVG-03-630	3900	1200	2200	3750	TBRQ+SVG-03-2800	4900	1400	2300	7000
TBRQ+SVG-03-710	3900	1200	2300	3950	TBRQ+SVG-03-3150	4900	1400	2300	7500

6.2 6 kV class

Soft-start cabinet model	L	W	H	Weight (kg)	Soft-start cabinet model	L	W	H	Weight (kg)
TBRQ+SVG-06-160	5025	1250	2200	2800	TBRQ+SVG-06-1120	5175	1250	2200	4850
TBRQ+SVG-06-200	5025	1250	2200	2900	TBRQ+SVG-06-1250	5175	1250	2200	5100
TBRQ+SVG-06-220	5025	1250	2200	3000	TBRQ+SVG-06-1400	5960	1550	2300	5500
TBRQ+SVG-06-250	5025	1250	2200	3150	TBRQ+SVG-06-1600	5960	1550	2300	6000
TBRQ+SVG-06-280	5025	1250	2200	3250	TBRQ+SVG-06-1800	5960	1550	2300	6500
TBRQ+SVG-06-315	5025	1250	2200	3350	TBRQ+SVG-06-2000	5960	1550	2300	7000
TBRQ+SVG-06-355	5025	1250	2200	3400	TBRQ+SVG-06-2240	5960	1550	2300	7200
TBRQ+SVG-06-400	5025	1250	2200	3500	TBRQ+SVG-06-2500	5960	1550	2300	7600
TBRQ+SVG-06-450	5025	1250	2200	3550	TBRQ+SVG-06-2800	6900	1550	2300	8000
TBRQ+SVG-06-500	5025	1250	2200	3650	TBRQ+SVG-06-3150	6900	1550	2300	8500
TBRQ+SVG-06-560	5175	1250	2200	3750	TBRQ+SVG-06-3550	6900	1550	2300	9000
TBRQ+SVG-06-630	5175	1250	2200	3900	TBRQ+SVG-06-4000	6900	1550	2300	9800
TBRQ+SVG-06-710	5175	1250	2200	4000	TBRQ+SVG-06-4500	7200	1750	2300	10300
TBRQ+SVG-06-800	5175	1250	2200	4200	TBRQ+SVG-06-5000	7200	1750	2300	11000
TBRQ+SVG-06-900	5175	1250	2200	4450	TBRQ+SVG-06-5600	7200	2200	2300	11500
TBRQ+SVG-06-1000	5175	1250	2200	4600	TBRQ+SVG-06-6300	7200	2200	2300	12000

6.3 10kV class

Soft-start cabinet model	L	W	H	Weight (kg)	Soft-start cabinet model	L	W	H	Weight (kg)
TBRQ+SVG-10-200	5860	1250	2200	3000	TBRQ+SVG-10-1600	6410	1250	2200	6500
TBRQ+SVG-10-250	5860	1250	2200	3150	TBRQ+SVG-10-1800	6410	1250	2200	6900
TBRQ+SVG-10-280	5860	1250	2200	3250	TBRQ+SVG-10-2000	6410	1250	2200	7200
TBRQ+SVG-10-315	5860	1250	2200	3350	TBRQ+SVG-10-2240	7090	1550	2300	7500
TBRQ+SVG-10-355	5860	1250	2200	3450	TBRQ+SVG-10-2500	7090	1550	2300	8000
TBRQ+SVG-10-400	5860	1250	2200	3500	TBRQ+SVG-10-2800	7090	1550	2300	8500
TBRQ+SVG-10-450	5860	1250	2200	3600	TBRQ+SVG-10-3150	7090	1550	2300	9000
TBRQ+SVG-10-500	5860	1250	2200	3650	TBRQ+SVG-10-3550	7090	1550	2300	9500
TBRQ+SVG-10-560	5860	1250	2200	3750	TBRQ+SVG-10-4000	7090	1550	2300	10800
TBRQ+SVG-10-630	5860	1250	2200	4000	TBRQ+SVG-10-4500	8580	1550	2300	11000
TBRQ+SVG-10-710	5860	1250	2200	4200	TBRQ+SVG-10-5000	8580	1550	2300	11800
TBRQ+SVG-10-800	5860	1250	2200	4400	TBRQ+SVG-10-5600	8580	1550	2300	12500
TBRQ+SVG-10-900	5860	1250	2200	4500	TBRQ+SVG-10-6300	8580	1550	2300	13000
TBRQ+SVG-10-1000	5860	1250	2200	4950	TBRQ+SVG-10-7100	8700	1550	2300	15000
TBRQ+SVG-10-1120	6110	1250	2200	5100	TBRQ+SVG-10-8000	8700	1750	2300	16000
TBRQ+SVG-10-1250	6110	1250	2200	5500	TBRQ+SVG-10-9000	8700	2200	2300	17800
TBRQ+SVG-10-1400	6410	1250	2200	6000	TBRQ+SVG-10-10000	8700	2200	2300	19500

Note: Due to continuous equipment upgrades, please confirm the external dimensions and weight with the manufacturer before placing an order.

VII. Single-Line Diagram (Soft Start)

Explanation: The system first performs a variable-frequency soft start by closing switch AH4. Once the variable-frequency system completes its soft-start sequence—after detecting the grid’s frequency, amplitude, and phase—it seamlessly transitions to line-frequency operation without disturbance, at which point bypass switch AH5 closes. The soft-start system then ceases operation. Subsequently, the selector switch is set to “SVG mode,” whereby the existing variable-frequency system, again performing frequency, amplitude, and phase detection, dispatches reactive power to be injected into the grid via switch AH3 for compensation.