2-10kV Medium Voltage Thyristor Motor Soft Starter Built-in Input Breaker

Short Description:

Medium voltage motor soft starter is a high voltage motor soft start designed with up-to date concept, mainly applicable to the control of and protection for the starting and stopping of squirrel-cage type asynchronous and synchronous motors. The motor starter is composed of several thyristors in series-parallel, bypass contactor, main control unit, current transformer, voltage transformer, arrester. It can meet different current and voltage requirements.

Medium voltage motor soft starter is widely used in electric industry with rated voltage 3000 to 10000V, building materials chemical industry,metallurgy, steel and paper-making industries etc., and can perform well if used together with various kinds ofelectromechanical devices including water pumps, fans, compressors, crashers, agitators and conveyer belt etc., It is the ideal device for starting and protecting high voltage motors.

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Features

High voltage motor soft starter built-in input breaker is the new type ac motor start device to replace the conventional star-delta starter, self-coupling voltage-drop starter and magnetic control voltage-drop starter. The start current can be lower than about 3 times of the motor rated current, could start repeatedly and continuously. High voltage motor soft starter built-in input breaker is our company's patented product, you do not need to add more KYN28 input switchgear, save your project investment.

The current transformer detects three-phase current and is used for current limiting and protection. Voltage transformer detects three-phase voltage. It is used for triggered phase detection and voltage protection for overvoltage and undervoltage. The MCU controller controls the thyristor for phase angle trigger control, simultaneously reduces the voltage on the motor, limits the starting current, and smoothly starts the motor until the motor runs at full speed. After the motor is running at full speed, switch to the bypass contactor. The medium voltage motor soft starter continues to detect the parameters of the motor to protect the motor. The high voltage motor soft starter can reduce the inrush current of the motor and reduce the impact on the power grid and the motor itself. At the same time, it also reduces the mechanical impact on the motor loading device, prolongs the service life of the device and reduces the failure of the motor. The keyboard&display module display all the parameters and status data of the motor soft starter.

1. Free of maintenance: Thyristor is an electric device without contacts. Different from other kinds of products that need frequent maintenance on liquid and parts etc., it turns the mechanical life into the service life of electronic components, so it needs no maintenance after running for many years, so the high voltag motor soft starter is very reliable.
2. Easy installation and operation: High voltage motor soft starter is a complete system for controlling and protecting the starting of motor. It can put into operation only with the power line and motor line connected. High voltage motor soft starter can be tested electrically under low voltage before operating with high voltage.
3. Backup: The high voltage motor soft starter comes equipped with a vacuum contactor which can be used to start the motor directly. If soft start fails, the vacuum contactor can be used to start the motor directly to ensure the continuity of the production.

4. High voltage motor soft starter comes equipped with an electromagnetic blocking device for fear of entering the high voltage device in the electrified state, make the high voltage soft starter very safe.
5. Advanced optical fiber transmission technique realizes the triggering detection of high voltage thyristor and the isolation between LV control loops, High and low voltages are isolated through optical fibers to ensure system security.
6. DSP microcontroller is used to perform central control which is real-time and high efficient with high reliability and excellent stability.
7. LCD/touch screen display system in both Chinese and English with human-friendly operation interface, display all the parameters and status of the soft starter.
8. RS-485 communication port can be used to communicate with the upper computer or centralized control center, you could control the soft starter remotely.
9. All of the high voltage motor soft starter circuit boards be tested by aging experiments before dispatch.

Specification

Basic parameters
Type of load	Three phase squirrel cage asynchronous and synchronous motors
AC voltage	3kv, 6kv, 10kv, 11kv
Power frequency	50/60hz±2hz
Phase sequence	Allowed to work with any phase sequence
Bypass contactor	Built-in bypass contactor
Control power supply	AC220V±15%
Transient over voltage	Dv/dt snubber network
Ambient condition	Ambient temperature: -20°C -+50°C
	Relative humidity: 5%----95% no condensation
	Altitude less than 1500m (derating when altitude ismore than 1500m)
Protection function
Phase lose protection	If any phase of the input three-phase power supply is missing, the system will alarm and stop.
Over-current protection	During bypass operation, if the measured operating current exceeds the overcurrent setting value, the system will trigger alarm and stop within the set period.
Module overheating	The system will trigger alarm and stop if the temperature of the driving modules is greater than 85 degree as detected by the fiber optic.
Start-up timeout	During the motor start-up process, if the motor fails to accelerate to full speed within the start-up timeout limit, the system will trigger alarm and stop.
Unbalanced current	If the motor imbalance current exceeds the set value, the system will trigger alarm and stip within the set period.
Overload protection	When the operating current reaches the level set for overload protection, the system will trigger alarm and stop.
Over-voltage protection	If the detected grid voltage of the input three-phase power supply exceeds the overvoltage protection set value, the system will trigger alarm and stop within the set period.
Under-voltage protection	If the input three phase power supply's grid voltage falls below the underoltage protection set value, the system will trigger alarm and stop within the set period.
Short circuit protection	If the measured current exceeds the set value of short circuit overcurrent, the system will trigger alarm and stop within the set period.
Output phase loss protection	If there is a phase loss at the output end connected to the motor, the system will trigger alarm and stop.
Leakage protection	If the zero-sequence current exceeds the set value, the system will trigger the alarm and stop within the set period.
Over frequency protection	When the start-up frequency eceeds the set time limit within a short period.
Communication
Protocol	Modbus RTU
Interface	RS485

Model

Model	Voltage level	Rated current	Dimensions of the cabinet
	(kV)	(A)	H(mm)	W(mm)	D(mm)
NMV-500-3-E	3	113	2300	1000	1500
NMV-900-3-E	3	204	2300	1000	1500
NMV-1250-3-E	3	283	2300	1200	1500
NMV-1800-3-E	3	408	2300	1500	1500
NMV-2000-3-E	3	453	2300	1500	1500
NMV-2000-3 and above	3	＞450	To be ordered
NMV-500-6-E	6	57	2300	1000	1500
NMV-1000-6-E	6	113	2300	1000	1500
NMV-1500-6-E	6	170	2300	1000	1500
NMV-2000-6-E	6	226	2300	1000	1500
NMV-2500-6-E	6	283	2300	1200	1500
NMV-3000-6-E	6	340	2300	1200	1500
NMV-3500-6-E	6	396	2300	1500	1500
NMV-4000-6-E	6	453	2300	1500	1500
NMV-4000-6 and above	6	＞450	To be ordered
NMV-500-10-E	10	34	2300	1000	1500
NMV-1000-10-E	10	68	2300	1000	1500
NMV-1500-10-E	10	102	2300	1000	1500
NMV-2000-10-E	10	136	2300	1000	1500
NMV-2500-10-E	10	170	2300	1000	1500
NMV-3000-10-E	10	204	2300	1200	1500
NMV-3500-10-E	10	238	2300	1200	1500
NMV-4000-10-E	10	272	2300	1200	1500
NMV-5000-10-E	10	340	2300	1500	1500
NMV-6000-10-E	10	408	2300	1500	1500
NMV-6000-10-E and above	10	＞450	To be ordered

In order to better understand your needs, before you order the high voltage motor soft starter, you need offer some more informations for us to confirm.

1. Motor parameters

2. Load parameters

3. Power supply parameters

4. Dimension of high voltage motor soft starter and input output type

5. Other parameters

Application

China Supply 3kv 6kv 10kv Pump Compressor Medium Voltage Thyristor Motor Soft Starter

The high voltage motor soft starters are widely used in paper mill, coal mine, petroleum, electric power, chemical industry, water conservancy, military industry, metallurgy, steel, shipbuilding, sewage treatment, light industry, railway, building materials, municipal engineering, pharmaceutical and other industrial fields. Application examples Water pump: (e.g., water supply, drainage, sewage treatment, oil pump, coal mine underground pump) Air compressor: (e.g., centrifugal, plunger, screw, turbine) Mill rolling machine, extruder blower, fan, centrifuge mixer, large winch.

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Customer service

1. ODM/OEM service is offered.

2. Quick order confirmation.

3. Fast delivery time.

4. Convenient payment term.

At present, the company is vigorously expanding overseas markets and global layout. We are committed to becoming one of the top ten export enterprises in China’s electrical automatic product, serving the world with high-quality products and achieving a win-win situation with more customers.