Name: China 3.3kV Soft Starter Manufacturers Suppliers Factory - Customized 3.3kV Soft Starter - RENLE
Brand: RENLE
SKU: 277113416

Product Function

The 3.3kV Soft Starter uses a series connection of controlled silicon valve groups with dual-power-supply triggering technology.
Drive and data acquisition are implemented via fiber optic communication multiplexing technology.
Touchscreen human-machine interface (HMI) allows real-time system monitoring, data collection from valve groups (RC average voltage, RC peak voltage, etc.), and modification or configuration of system control parameters.
Equipped with OBD and software-based dual overvoltage protection functions.
Valve group limit data are collected after each startup to assess system condition.
Synchronous use of phase-locked loop (PLL) and three-phase conduction compensation control algorithms.
Protection functions include under-voltage, phase loss, overcurrent, overheating, thyristor overvoltage, trigger failure, voltage imbalance, RC current abnormality, thyristor failure, fiber optic communication interruption, and trigger power supply abnormality; any abnormal condition prevents startup.* Supports Modbus RTU, PROFIBUS-DP, CAN, and TCP/IP communication protocols with corresponding interface configuration.
Enables remote software updates, debugging, waveform monitoring, and fault analysis via the Internet.
Connects to cloud servers via industrial Ethernet and 5G to provide data for big data analysis and AI algorithms, fully leveraging cloud computing to perform online analysis and diagnosis of motor operating status, fault warnings, and optimized control.

Soft Start Function

Strong Load Adaptability with Three Start Control Modes:

1. Constant Current Start:** During startup, the current quickly rises to the specified value and maintains it until the motor reaches full speed.

2. Current Ramp Start:** The current increases gradually to the maximum starting current until the motor reaches full speed.

3. Pulse-Choke Start:** Designed primarily for heavy-duty loads.

Optional Free-Stop or Soft-Stop Function:** Suitable for various applications, such as preventing water hammer in pumps, to meet specific operational requirements.

3.3 KV Soft Starter Technical Features

Medium-voltage series thyristor valve groups designed to handle high voltage.
Fiber-optic isolated triggering ensures safe and reliable control.
Advanced voltage balancing and protection technologies safeguard device security.
Effective cooling (air or water) manages high power losses.
High-performance controller enables precise phase control and multiple start/stop strategies.
Comprehensive protection functions cover the motor, the soft starter, and the grid.
Modular, high-insulation structure suitable for high-voltage environments.
Bypass operation reduces operational losses.
Powerful monitoring and communication capabilities facilitate integration and management.

These features enable 3.3kV Soft Starter to address issues associated with direct-on-line starting of high-voltage, high-power motors-such as mechanical shock, grid voltage sags, and electrical stress-ensuring smooth, controllable, and reliable starting and stopping. When selecting a soft starter, specific motor parameters (power, rated current), load characteristics (fan, pump, compressor, conveyor, etc.), grid conditions, and application requirements (e.g., starting torque, start time limitations) must be considered to determine the most suitable model and control mode.

Schematic Diagram of Input and Output Interfaces

Schematic Diagram Of Input And Output Interfaces

System Composition

Each thyristor series valve group includes: thyristor, driving board, power supply and optical fiber board, and voltage sharing RC;

Thyristor: The main power device, with specifications determined by the device current and system voltage.

Driving Board: Conveys control commands from the main control board to switch the thyristors on and off.

Power Supply and Fiber Optic Board: Receives instructions from the main control board to provide driving power and control signals to the driving board, and returns data collected by the driving board to the main control board.

Voltage-Sharing RC: Balances the voltage distribution across the thyristors in the series valve group and accelerates thyristor turn-off.

Technical Parameters

Data Name	Working Range
Frequency	50Hz/60Hz±2Hz(selected according to user's grid)
Overload capacity	400% control nominal value 60s
Overload capacity	500% control nominal value 30s
Applicable motor	Three-phase squirrel-cage asynchronous and synchronous motor

Application environment
Temperature	Cabinet temperature 0°C~40°C, (Heater is optional for -20°C~0°C)
Humidity	5%~95% relative humidity
Altitude	Below 2000m. Derating is necessary for altitude above 2000m.
Place	Indoors, no explosive or corrosive gas, with low dust
Cooling	Natural cooling

Structural features
Protection level	IP4X
Operation power supply	2kVA AC220V supplied by the user (can be specified).
Main circuit	The number of thyristors is determined by the model.
Communication protocol	Integrated Modbus RTU, Modbus TCP, CAN and PROFIBUS DP communication protocols, equipped with interface.
Communication interface	RJ45
Operation interface	7-inch touch screen (HMI) which monitors system status in real-time. Used for setting and modifying parameters.
Event record	It can continuously record events and historical curves with time and date stamps within 10 days.
Performance monitoring	Current, voltage, power factor, module temperature, RC average and peak voltage, RC current, etc.
Input and output options	10 channels of 24VDC programmable inputs, 2 channels of 16A and 4 channels of 5A programmable outputs, 1 analog programmable output (4~20mA).
User management	Multi-level user password protection (can be specified).
Interface language	Chinese, English, Russian (can be specified)
Thyristor	Thyristor valve group in series
Drive and data	Dual power supply triggering, optical fiber communication multiplexing technology;
	Adopting synchronous phase-locked loop, three-phase conduction compensation algorithm;
	Equipped with OBD and software double overvoltage function;
	After startup is completed, the valve group limit data are counted for evaluating the system status.
Monitoring	HMI window, used for real-time monitoring of system status, collection of valve group data and setting and modification of control parameters.
Protection	Undervoltage, overvoltage, phase loss, overheating, abnormal voltage sharing, abnormal RC current, thyristor failure, optical fiber communication interruption, abnormal triggering power supply etc.
Cloud service	Remote software update, commissioning, data waveform monitoring and fault analysis is realized through InterNet;
	After connecting to the cloud server through industrial Ethernet + 5G, the soft starter provides data for big data analysis and related AI algorithms;
	makes full use of the computing power of the cloud platform to realize online analysis and diagnosis of motor operating status, and realizes fault pre-warning and optimized control.
Cabinet color	Selected by the user.

Start data
Starting current	Adjustable within 4 times of the rated current of the motor.
Starting time	Adjustable within 10~60 seconds.
Number of starts	6 times per hour at an ambient temperature of 25°C.
Starting interval	No less than 5 minutes between two starts.

Protection parameters
Transient overcurrent	Protection range 200%~800%
Inverse time overcurrent	The protection time is 1 minute for 1.5 times, used for protecting the motor during bypass operation.
Incoming line undervoltage	Range: 0%~100%
Grounding	Ground protection is identified by zero-sequence current.
Output phase loss	Set the threshold 1.0%~50% according to the parameters by comparison of the three-phase output current.
Thyristor breakdown	Set action threshold through parameters by monitoring voltage of each level of thyristors.
RC current	Monitor RC current of each level of thyristors and identity RC working status. Current deviation can be set.
Trigger failure	During startup, the number of triggering failure exceeds the set parameter value within 2 seconds of detection window, so protection acts.
Start timeout	The start time exceeds the set value.
Triggering power	If the power of the triggering board is lower or higher than the hardware protection value, protection of triggering board power acts.
Temperature	SCR temperature exceeds the set parameters.
Thyristor overvoltage	During the starting process, each level of SCR is equipped with OBD protection. During one starting process, the number of overvoltage automatic triggering reaches the set parameter, the protection is performed.

Product Selection table

Valve group current (A)	Voltage (kV)	Max. power of universal motor (kW)	Specifications	Cabinet dimensions (H×W×D,mm)	Weight (t)
Valve group current (A)	Voltage (kV)	Max. power of universal motor (kW)	Specifications	Cabinet dimensions (H×W×D,mm)	Weight (t)
150	3	630	RNMV-030150	23008001500	0.7
150	3.3	650	RNMV-033150	23008001500	0.7
150	6	1250	RNMV-060150	23008001500	0.7
150	6.6	1350	RNMV-066150	23008001500	0.7
150	10	2000	RNMV-100150	23008001500	0.75
150	11	2240	RNMV-110150	23008001500	0.75
330	3	1350	RNMV-030330	230010001500	0.78
330	3.3	1500	RNMV-033330	230010001500	0.78
330	6	2700	RNMV-060330	230010001500	0.8
330	6.6	3000	RNMV-066330	230010001500	0.8
330	10	4500	RNMV-100330	230010001500	0.8
330	11	5000	RNMV-110330	230010001500	0.8
500	3	2000	RNMV-030500	230011001500	0.85
500	3.3	2240	RNMV-033500	230011001500	0.85
500	6	4000	RNMV-060500	230011001500	0.85
500	6.6	4500	RNMV-066500	230011001500	0.85
500	10	6800	RNMV-100500	230011001500	1
500	11	7600	RNMV-110500	230011001500	1
700	3	2800	RNMV-030700	230012001500	1
700	3.3	3150	RNMV-033700	230012001500	1
700	6	5800	RNMV-060700	230012001500	1.2
700	6.6	6300	RNMV-066700	230012001500	1.2
700	10	9600	RNMV-100700	230012001500	1.25
700	11	10000	RNMV-110700	230012001500	1.25
1000	3	4000	RNMV-0301000	230014001500	1.5
1000	3.3	4500	RNMV-0331000	230014001500	1.5
1000	6	8200	RNMV-0601000	230014001500	1.8
1000	6.6	9100	RNMV-0661000	230014001500	1.8
1000	10	13500	RNMV-1001000	230014001500	1.8
1000	11	15000	RNMV-1101000	230014001500	1.8

Applications

We strive to support more industries in their development by providing high-quality products.

The RNMV-CI medium-voltage 3.3kV Soft Starter can be used in a wide range of industries, including electric power, metallurgy, petroleum, petrochemical, mining, building materials, chemical industry, and municipal applications. It provides a compact, stable, and reliable soft-starting solution for controlling medium-voltage motors. With a comprehensive set of motor and system protection functions, Renle's soft starters deliver reliable performance even in the harshest environments. Featuring abundant user interfaces and a modular design, our intelligent soft starters can meet the starting requirements of large and medium-sized general machinery in modern industries.

We are always ready to provide you with the right solutions!


Electric power industry	Steel industry	Chemical industry	Petroleum Industry

Coal industry	Water conservancy industry	Paper industry	Machinery manufacturing

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