Product details

Product Overview:

High voltage soft starter is a novel motor control device that integrates motor soft start, soft stop, light load energy saving and multiple protection functions. Its main composition is the three opposite parallel gates and their electronic control circuits connected in series between the power supply and the controlled motor. Use different methods to control the conduction angle of the three opposite parallel gates, so that the input voltage of the controlled motor changes according to different requirements, and different functions can be realized.

How it works:

The high-voltage soft start cabinet adopts computer control technology and power electronics technology, and the switching element of the main loop adopts high-voltage and high-power thyristors, which realize the output voltage by controlling the thyristors, and the starting current is optimally controlled according to the starting conditions to achieve the smooth start and stop of the motor.

The high-voltage soft start cabinet can reduce the voltage applied to the motor by controlling the thyristors, and then smoothly increase the motor torque by slowly controlling the voltage and current applied to the motor, until the motor accelerates to full speed operation, which can effectively reduce the starting current, and the thyristor static and dynamic voltage equalization protection measures should have the characteristics  of technology, compact structure, safety and reliability, and convenient maintenance

The high-voltage soft start cabinet adopts welded structure, which has the characteristics  of good dust resistance, compact structure, and beautiful appearance

The high-voltage soft start cabinet can reduce the voltage applied to the motor by controlling the thyristors, and the starting current is adjustable by 1~5 times the rated current.   

The high-voltage soft-start cabinet adopts signal multi-stage processing and isolation technology, which has strong anti-interference ability.    

The high-voltage soft start cabinet can accurately collect the synchronization signal and current signal of the high-voltage main loop, effectively realizing closed-loop control.   1.3.7 The high-voltage solid-state soft starting device has a bypass function, and after the start is completed, it will cut to the power frequency operation without disturbance.   

Protection Functions 

There are 6 levels of overload protection, which are protected according to the set overload protection curve.

Overcurrent protection: 20-500% Ie realizes overcurrent protection during operation by detecting the current during operation;   

Overvoltage protection: when the main grid voltage rises to 120% of the rated voltage, delay 1~10S (adjustable), trip protection;   

Undervoltage protection: when the main grid voltage is lower than 70% of the rated voltage, the delay time is 1~10S (adjustable), trip protection;   

Phase Loss Protection: When any phase is missing, trip protection;

Phase sequence protection: Phase sequence detection can be set to protect when phase sequence errors are detected.   

Phase current imbalance: The current imbalance of the main loop exceeds the set value (0~100% adjustable), trip protection;    

Thyristor over-temperature protection: trip protection when the temperature of the thyristor radiator exceeds 85°C;

Starting overtime protection: within the set long starting time (0~120S adjustable), the motor still does not reach full speed, trip protection;   

Zero-sequence protection: trip protection when leakage current is detected

With self-test program: boot self-test

Technical features and configuration  

Maintenance-free: Triac is a contactless electronic device, unlike other types of products that require frequent maintenance of liquids and components, turning the mechanical life into the service life of electronic components, and there is no need for downtime and maintenance for several years of continuous operation.   

Easy to install and use: SQ1-10KV-4000KW is a complete motor start control and protection system. Allow the entire system to be electrically tested using low voltage before operating at increased voltage.   

It adopts high-voltage power thyristors, with a modular structure and modular design, which is easy to install and maintain.   

With multiple overvoltage absorption and protection technologies  

The vacuum contactor with built-in direct starting capacity can work in the direct start mode during maintenance or when there is a fault to ensure the continuity of production.   

It uses a 32-bit ARM core microcontroller to perform central control, which is real-time and efficient, intuitive display, high reliability and good stability.   

The use of foreign high-anti-interference digital trigger and optical fiber isolation technology makes the high and low voltage of the device reliably isolated.   

It adopts Chinese LCD display system and has a user-friendly operation interface.   

RS-485 communication interface, standard MODBUS protocol. It can communicate with the host computer or the centralized control center.     

The circuit boards have undergone strict aging experiments and are treated with three proofs, and the motherboard and control board CPU are all selected from original products.  

Voltage sampling adopts electromagnetic voltage transformer, good sampling linearity, strong anti-interference, no zero drift 

The high-voltage soft-start cabinet has three-phase voltage and three-phase current display. Protection functions: phase loss, undervoltage, overvoltage, overcurrent, overload, etc., RS485 interface is used to lead to centralized monitoring.   

The high-voltage soft start cabinet bus is made of electrolytic copper, with a purity of 99.99%, and the ampacity carrying capacity and cross-sectional area are supported by high insulation material molds according to the design requirements.

The high-voltage soft-start cabinet reserves the signal contacts of the system

Technical Parameters

Equipment Number	AQ1
Equipment Model	KRMV-10KV-500KW
Primary Busbar
Single Line Diagram - Rated Voltage 10KV
Equipment Purpose	High Voltage Soft Starter Device
Power Equipment	Capacity (kW)	500kW
	Voltage (V)	10kV
	Current (A)	24A
	Soft Starter System	HYSQ-15
Components	Model	Specification
	Contact	JZC5-10/630A AC220V
	High Voltage Circuit Breaker	XRNP1-10/0.5A
	Current Transformer	LZZBJ9-10 50/5A 0.5/10P10
	Zero Sequence Transformer	LXK-120 50/5
	Arrester	HY5WS-17/50
	Controller Protection	Valve Group Protection, Over-voltage, Undervoltage, Ground Fault
	Principle Diagram/Operation Mode	Soft Start/Direct
External Dimensions (Width*Height*Depth)	1000*2300*1500

Solid state high-voltage soft start cabinet is a standard motor starting and protection device used to control and protect high-voltage AC motors. The standard HYSQ1 product is mainly composed of the following components: high-voltage triac module, triac protection component, fiber optic trigger component, vacuum switch component, signal acquisition and protection component, system control and display component.

Triac module: The triac with the same parameters in each phase is installed together in series and parallel. Depending on the peak voltage requirements of the grid used, the number of SCR series connections is selected differently.

Valve body protection unit: including an overvoltage absorption network composed of RC network and a voltage equalization protection network composed of a voltage equalization unit.

Optical fiber trigger parts: strong trigger pulse circuit is used to ensure the consistency and reliability of triggering; Utilizes fiber optic triggering for reliable high and low voltage isolation.

Vacuum switch parts: After the start-up is completed, the three-phase vacuum contactor is automatically suctioned, and the motor is put into the power grid for operation.

Signal acquisition and protection components: The voltage and current signals of the main loop are collected through voltage transformers, current transformers, lightning arresters, and zero-sequence current transformers, and the main CPU controls and protects them accordingly.

System control and display components: 32-bit ARM core microcontroller performs central control, Chinese LCD HMI display.

1.1. Conditions of use

Ambient temperature: -25°C~+50°C

Place of use: indoors, not exposed to direct sunlight, no dust, corrosive gas, flammable and explosive gas, oil mist, water vapor, dripping water or salt rain and moisture resistant

Humidity: 5%-95%, no bead condensation

Vibration: less than 5.9m/sec² (=0.6g)

No metal shavings, conductive dust, Places of corrosive gases and violent vibrations

Altitude: ≤1500 meters (more than 1500 meters need to be reduced for capacity);

1.2. Technical parameters

Load type: three-phase medium and high voltage squirrel cage asynchronous, synchronous motor

Rated voltage: 3KV, 6KV, 10KV±30% Power

supply frequency: 50Hz

Adaptive power:

Full load current of motor: 15-9999

adjustable starting

voltage: (20~100%) Ue adjustable

starting current: (20~100%) Ie adjustable

Current limit multiple: 100-500% Ie adjustable

Start/stop time: 0-120S adjustable

Four types of start control curves: Voltage ramp starting index curve

Voltage ramp starting linear curve

Current ramp starting index curve

Current ramp starting linear curve

Jump voltage: 20-100% Ue adjustable Jump time: 0-2000ms adjustable

Start

frequency: 1-6 times/hour

Every two intervals are not less than 10 minutes

Grounding method: three-phase, neutral point is not grounded

Communication interface: RS-485 interface

Cooling method: natural air cooling

Main circuit inlet and outlet line mode: down in and out

Control

mode: one drag one

Protection level: IP32

1.3, working principle

1.3.1 The high-voltage solid-state soft start device adopts computer control technology and power electronics technology, and the switching element of the main loop adopts high-voltage and high-power thyristors, which realize the output voltage by controlling the thyristors, and the starting current is optimally controlled according to the starting conditions to achieve the smooth start and stop of the motor.

1.3.2 The high-voltage solid-state soft start device can reduce the voltage applied to the motor by controlling the thyristor, and then smoothly increase the motor torque by slowly controlling the voltage and current applied to the motor, until the motor accelerates to full speed, which can effectively reduce the starting current.

It has the characteristics of good dust resistance, compact structure, and beautiful

appearance 1.3.4 The high-voltage solid-state soft starting device can reduce the voltage applied to the motor by controlling the thyristor, and the starting current is adjustable by 1~5 times the rated current.

1.3.5 The high-voltage solid-state soft start device adopts signal multi-stage processing and isolation technology, which has strong anti-interference ability.

1.3.6 The high-voltage solid-state soft start device can accurately collect the synchronization signal and current signal of the high-voltage main circuit, and effectively realize closed-loop control.  1.3.7 The high-voltage solid-state soft starting device has a bypass function, and after the start is completed, it will cut to the power frequency operation without disturbance.

1.4. Protection function

1.4.1 Overload protection has a total of 6 protection levels, which are protected according to the set overload protection curve;

1.4.2 Overcurrent protection: 20-500%Ie realizes overcurrent protection during operation by detecting the current during operation;

1.4.3 Overvoltage protection: When the main grid voltage rises to 120% rated voltage, delay 1~10S (adjustable), trip protection;

1.4.4 Undervoltage protection: when the voltage of the main grid is lower than 70% of the rated voltage, the delay time is 1~10S (adjustable), trip protection;

1.4.5 Phase Loss Protection: When any phase is missing, trip protection;

1.4.6 Phase sequence protection: Phase sequence detection can be set to protect when phase sequence error is detected;

1.4.7 Phase current imbalance: The current imbalance of the main loop exceeds the set value (0~100% adjustable), trip protection;

1.4.8 Thyristor over-temperature protection: trip protection when the thyristor radiator temperature exceeds 85°C;

1.4.9 Starting timeout protection: within the set long starting time (0~120S adjustable), the motor still does not reach full speed, trip protection;

1.4.10 Zero-sequence protection: trip protection when leakage current is detected

1.4.11 With self-test program: power on self-test

1.5. Technical characteristics and configuration

1.5.1 Maintenance-free: Triac is an electronic device without contacts, unlike other types of products that require frequent maintenance of liquids and components, etc., turning the mechanical life into the service life of electronic components, and there is no need for downtime maintenance for several years of continuous operation.

1.5.2 Easy to install and use: ZDGR is a complete motor start control and protection system. Allow the entire system to be electrically tested using low voltage before operating at increased voltage.

1.5.3 High-voltage power thyristors are adopted, with modular structure and modular design, which is easy to install and maintain.

1.5.4 With multiple overvoltage absorption and protection technologies

1.5.5 Built-in vacuum contactor with direct starting capacity, the motor can work in direct start mode during maintenance or when there is a fault to ensure the continuity of production.

1.5.6 The 32-bit ARM core microcontroller is used to perform central control, which is efficient in real time, intuitive in display, high in reliability and stable.

1.5.7 The famous foreign high-anti-interference digital trigger and optical fiber isolation technology are used to make the high and low voltages of the device reliably isolated.

1.5.8 Adopt Chinese LCD display system, and the operation interface is user-friendly.

1.5.9 RS-485 communication interface, standard MODBUS protocol. It can communicate with the host computer or the centralized control center.

1.5.10 The circuit boards have undergone strict aging experiments and are treated with three-proof treatment, and the motherboard and control board CPU are all original products.

1.5.11 Voltage sampling adopts electromagnetic voltage transformer, good linearity, strong anti-interference, no zero drift

1.5.12 The high-voltage solid-state soft start device has three-phase voltage and three-phase current display. Protection functions: phase loss, undervoltage, overvoltage, overcurrent, overload, etc., RS485 interface is used to lead to centralized monitoring.

1.5.13 The busbar of the high-voltage solid-state soft starter is made of electrolytic copper, with a purity of 99.99%, and the current carrying capacity and cross-sectional area are supported by high insulation material molds according to the design requirements.

1.5.14 High voltage solid-state soft start device reserved system signal contacts

(1) Output signal contacts:

operating state signal: normally open contact Stop state signal: normally closed contact

Fault state signal: normally open contact 4~20mA analog output signal

(2) External input signal contact:

Remote Start Signal Input: Passive Normally Open Contact Remote Shutdown Signal Input: Passive Normally Closed Contact

DCS Starting Signal Input: Passive Normally Open Contact DCS Shutdown Signal Input: Passive Normally Closed Contact

Switchgear Ready Signal Input: Passive Normally Open Contact

1.6. Operation/Control Mode

4.7.1 Input Method: Menu, Chinese LCD HMI Display;

4.7.2 It has local, remote (external dry contact), DCS, and communication (485 interface, Modbus) control functions;

1.7. Overall dimensions

The

external dimensions of the soft start cabinet are 1000×1500×2300 (width× depth, × height), and the internal layout meets the requirements of safety, convenient wiring, and convenient maintenance.

2. Starting characteristics

2.1. Soft start control mode

Soft start and soft stop voltage (current) characteristic curve

HYSQ1 series soft start device has a variety of starting methods: current limit soft start, voltage linear curve start, voltage index curve start, current linear curve start, current index curve starting; A variety of parking methods: free parking, soft parking, brake brake, soft stop + brake brake, and also have jogging function. Users can choose different starting and parking methods according to different loads and specific usage conditions.

2.1. Soft start of current limiting

When using the current limiting soft start mode, the starting time is set to zero, and after the soft starting device gets the starting command, its output voltage increases rapidly until the output current reaches the set current limit value Im, the output current does not increase, and the current begins to drop after the motor accelerates for a period of time, and the output voltage increases rapidly until the full voltage output is completed.

2.2. Voltage index curve

The output voltage rises exponentially at a set starting time, while the output current increases at a certain rate, and when the starting current increases to the limit value Im, the current remains constant until the starting is completed. When using this mode, both the start-up time and the current limit multiple need to be set.

2.3. Voltage linear curve

The output voltage rises according to the linear characteristics at the set starting time, and the output current increases at a certain rate, and when the starting current increases to the limit value Im, the current remains constant until the starting is completed.

2.4. Current index curve

The output current rises exponentially at a set starting time, and when the starting current increases to the limit Im, the current remains constant until the starting is completed. When using this mode, both the start-up time and the current limit multiple need to be set.

2.5. Linear curve of current

The output current rises according to the linear characteristics at the set starting time, and when the starting current increases to the limit value Im, the current remains constant until the starting is completed.

2.6. The jump torque is soft started

The jump torque soft start mode is mainly used on load motors with large static resistance, and overcomes the large static friction moment by applying an instantaneous large starting torque. In this mode, the output voltage quickly reaches the set burst voltage, and when the preset burst time is reached, it drops to the starting voltage, and then starts smoothly according to the set starting voltage current and starting time until the start is completed.

2.7. Free parking

When the soft stop time and brake time are set to zero at the same time, it is the free stop mode, and after receiving the stop command, the soft start device first blocks the control relay of the bypass contactor and then blocks the output of the thyristor of the main circuit, and the motor stops freely according to the load inertia.

2.8. Soft parking

When the soft stop time is not set to zero, the stop in the full voltage state is soft stop, in this way, the soft start device first disconnects the bypass contactor, the output voltage of the soft start device gradually drops to the set soft stop end voltage value in the set soft stop time, and the starting device turns into a brake state (braking time is not zero) or stops freely at the end of the soft stop process.

2.9. Brake brake

When the soft start device sets the brake time and the brake time relay output is selected, the brake time relay output signal remains valid during the stop (braking) time when the soft start device stops freely. The time relay output signal is used to control the external brake unit or the mechanical brake electrical control unit

2.10. Soft stop + brake

When the soft start device sets the soft stop time and the brake time is set, the soft start device first disconnects the bypass contactor, and the output voltage of the soft start device gradually drops to the set soft stop end voltage value in the set soft stop time, and the soft stop process is finished and brakes within the set braking time.