6.6kV Soft Starter
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6.6kV Soft Starter

6.6kV Soft Starter

The 6.6kV soft starter is a solid-state medium-voltage soft starter engineered for three-phase induction motors. It controls motor acceleration, deceleration, and protection by adjusting the output voltage via thyristor conduction angle regulation. This allows smooth starting and stopping operations, which greatly reduces inrush current to the power supply and decreases mechanical stress on driven equipment and couplings. As a result, electrical grid disturbances are minimized and mechanical parts are protected from shock loads.

Product Introduction

 

The 6.6 kV soft starter is a solid-state, medium-voltage device designed for three-phase induction motors. It controls motor acceleration, deceleration, and protection by adjusting the output voltage through thyristor conduction angle regulation. This enables smooth starting and stopping operations, greatly reducing inrush current to the power supply and decreasing mechanical stress on driven equipment and couplings. As a result, electrical grid disturbances are minimized, and mechanical components are protected from shock loads.

 

Medium-voltage systems are inherently complex-your starter shouldn't complicate them further. RENLE's RNMV-EI medium-voltage soft starter simplifies operation with user-friendly features such as plain-language diagnostics, eliminating the need for code deciphering. Built-in monitoring, status indicators, and comprehensive I/O options save space and reduce auxiliary costs, while also speeding up commissioning. Real-time motor performance curves and current readings offer clear visibility into operating conditions. With intuitive feedback in everyday language, the RNMV-EI enables straightforward starting control-no manual decoding required.

Rated voltage: 3kV/3.3kV/4.16kV/

6kV/6.6kV/10kV/

11kV/13.8kV

Rated power:

250kW-15000kW;

Starting current: Adjustable range 1.5-5 times;

Adopt serial thyristor valve group and dual power supply trigger technology;

Products advantages

hv soft starter
01.

5G Industrial Ethernet & Cloud Connectivity

This system leverages 5G industrial Ethernet combined with a cloud platform to deliver comprehensive remote technical support for field equipment. It enables a complete operational cycle, from data acquisition and waveform display to remote diagnostics and software updates.

02.

Multi-Protocol Communication Support

The starter offers extensive connectivity options, supporting protocols including Modbus RTU, Modbus TCP, and PROFIBUS DP. Multiple reserved interfaces facilitate easy parameter configuration and real-time data monitoring. Additionally, with dedicated software tools, users can perform remote waveform analysis, data downloads via FTP/TFTP, and seamless software upgrades.

mv soft starter board

Operation Panel Description

 

This 6.6kV Soft Starter series of Intelligent high-voltage solid-state soft starting cabinets use PLC andHMI (Human-Machine Interface, refer to touchscreen) as peripheral application extensions,PLC as peripheral terminal function extensions, and HMI as Intelligent high-voltage solid and state soft starting cabinet status monitoring and parameter modification.

Main screen

Function Overview

The 6.6kV Soft Starter main components include:

one HMI

one DC24V Power Supply

one vacuumcontactor for bypass

three CT

 

three voltage sensors

main controller

power modul 

 

Function Items

Function Description

Start Up

Constant Current

Current ramp

Stop

Coast to stop

Soft stop

Protect

Zero sequence overcurrent protection

Component overheat protection

Grounding protection

Undervoltage protection

Transient ovecurrent

Time limit current (start-up)

Output open-phase

Trigger board power protection

RC Current Protection

SCR Overvoltage trigger protection

I/O

Programmable input (10)

AQ

Programmable analog output (1)

Communication

One Modbus_RTU/PROFIBUS_DP (RS485)

One Modbus_TCP/IP (RJ45)

CAN Bus

One Modbus_RTU (RS485) used to connect the HMI of the cabinet

 

Medium voltage Starter Selection Table

 

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

2300*800*1500

0.7

150

3.3

650

RNMV-033150

2300*800*1500

0.7

150

6

1250

RNMV-060150

2300*800*1500

0.7

150

6.6

1350

RNMV-066150

2300*800*1500

0.7

150

10

2000

RNMV-100150

2300*800*1500

0.75

150

11

2240

RNMV-110150

2300*800*1500

0.75

330

3

1350

RNMV-030330

2300*1000*1500

0.78

330

3.3

1500

RNMV-033330

2300*1000*1500

0.78

330

6

2700

RNMV-060330

2300*1000*1500

0.8

330

6.6

3000

RNMV-066330

2300*1000*1500

0.8

330

10

4500

RNMV-100330

2300*1000*1500

0.8

330

11

5000

RNMV-110330

2300*1000*1500

0.8

500

3

2000

RNMV-030500

2300*1100*1500

0.85

500

3.3

2240

RNMV-033500

2300*1100*1500

0.85

500

6

4000

RNMV-060500

2300*1100*1500

0.85

500

6.6

4500

RNMV-066500

2300*1100*1500

0.85

500

10

6800

RNMV-100500

2300*1100*1500

1

500

11

7600

RNMV-110500

2300*1100*1500

1

700

3

2800

RNMV-030700

2300*1200*1500

1

700

3.3

3150

RNMV-033700

2300*1200*1500

1

700

6

5800

RNMV-060700

2300*1200*1500

1.2

700

6.6

6300

RNMV-066700

2300*1200*1500

1.2

700

10

9600

RNMV-100700

2300*1200*1500

1.25

700

11

10000

RNMV-110700

2300*1200*1500

1.25

1000

3

4000

RNMV-0301000

2300*1400*1500

1.5

1000

3.3

4500

RNMV-0331000

2300*1400*1500

1.5

1000

6

8200

RNMV-0601000

2300*1400*1500

1.8

1000

6.6

9100

RNMV-0661000

2300*1400*1500

1.8

1000

10

13500

RNMV-1001000

2300*1400*1500

1.8

1000

11

15000

RNMV-1101000

2300*1400*1500

1.8

 

Technical Parameters

 

Data Name Working Range
Frequency 50Hz/60Hz±2Hz(selected according to user's grid)
Overload capacity 400% control nominal value 60s
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.

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