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RQ-4 soft starter
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RQ-4 soft starter
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Detailed introduction
Role
RQ-4 motor soft starter is a new type of motor starting and protecting device, which combines power electronic technology, microprocessor and automatic control. It can smoothly start/stop the motor without step, avoid mechanical and electrical shock caused by traditional starting methods such as direct starting, star/triangle starting, and self-coupling step-down starting, and can effectively reduce the starting current And distribution capacity to avoid capacity increase investment. At the same time, RQ-4 soft starter internal integrated current transformer, users do not need external.
Features
◆ Unique SCR trigger closed-loop control algorithm
The unique SCR closed-loop control function is specially designed for standard and heavy loads. Users can select current limiting start and voltage ramp start according to load conditions to achieve an absolutely smooth starting effect without torque oscillation.
◆ High control precision, real-time and high efficiency
High-performance Cortex-M3 32-bit core CPU execution center control, high speed, high precision, strong anti-interference ability.
◆ Beautiful appearance
Patent protection of the main circuit three-in-six-out structure, built-in current transformer scheme, convenient wiring, high reliability.
◆ Standard MODBUS-RTU protocol that can be matched
Users can order according to the needs of the scene, optional with standard MODBUS-RTU communication protocol or not.
◆ Integrated advanced protection function
It has the protection functions of input and output phase loss, overload, overcurrent, phase current imbalance, thyristor over temperature, etc., and protects the motor and related equipment in all directions.
◆ Full refractory material
The following 90KW is a full plastic shell structure, made of flame retardant ABS material, the upper cover of 90KW and above power section is a plastic shell structure, and the main frame is made of aluminum-zinc plate material, which has heat resistance and corrosion resistance.
◆ External lead panel
The panel can be led to the operating surface of the equipment for remote operation through the fuselage interface, which is convenient for on-site use.
◆ Simple maintenance
The monitoring signal coding system composed of 4-digit digital display monitors the working status of the system equipment 24 hours a day, and provides fast fault diagnosis.
Soft starter model description
Soft starter model description
Basic Wiring Schematic Diagram
The soft starter terminals 1L1, 3L2, 5L3 are connected to the three-phase power supply, and 2T1, 4T2, 6T3 are connected to the motor. The soft starter can select whether to detect the phase sequence through parameter setting. When the bypass contactor is used, one side of the contactor is connected to the soft starter 1L1, 3L2, 5L3, and the other side is connected to B1, B2, B3.
Note: The communication interface is an optional function port, which adopts the connection terminal of the optical fiber crystal head. As shown in the figure, it is 1 pin to 8 pins from top to bottom. Please refer to Terminal Definitions for specific terminal definitions.
Terminal Description
RQ-4 series soft starter has 12 external control terminals, providing convenience for users to realize external signal control, remote control and system control.
| Terminal Number |
Terminal Name |
Description |
||
| Lord Back Road |
1L1、3L2、5L3 |
AC power input terminal |
Connect to three-phase AC power supply, bypass contactor |
|
| 2T1、4T2、6T3 |
Soft start output terminal |
Connect three-phase asynchronous motor |
||
| B1、B2、B3 |
Bypass contactor terminal |
To bypass contactor |
||
| Control system Back Road |
X1/1 |
Analog Output-(AO-) |
0 ~ 20mA or 4 ~ 20mA Output load impedance (150-500 Ω) |
|
| X1/2 |
Analog output (AO) |
|||
| X1/3 |
COM |
public end |
||
| X1/4 |
External control starting terminal (RUN) |
X1/4 and X1/3 short circuit start |
||
| X1/5 |
External control stop terminal (STOP) |
X1/5 and X1/3 disconnect and stop |
||
| X1/6 |
Bypass output relay (K11, K12) |
When the output is valid, the K11-K12 is closed, and the contact capacity is AC250V/5A, DC30V/5A |
||
| X1/7 |
||||
| X1/8 |
Fault output relay (K21, K22) |
When the output is valid, the K21-K22 is closed, and the contact capacity is AC250V/5A, DC30V/5A |
||
| X1/9 |
||||
| X1/10 |
PE |
PE |
||
| X1/11 |
L |
Control power supply (220VAC) |
AC110V--AC220V±15% 50/60Hz |
|
| X1/12 |
N |
|||
| Communication Interface |
1、2 |
GND |
Power ground |
The terminal definition is used in conjunction with the basic wiring schematic diagram in Chapter 4. |
| 3、4 |
A |
Communication terminal |
||
| 5, 6 |
B- |
|||
| 7、8 |
24V |
Power supply positive |
||
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Mingcheng Green Valley Wisdom Industrial Park, Renmin East Road, Jingkai District, Changsha, Hunan Province.China
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