Microsoft Word SB200 manual 620 doc I SENLAN INVERTER USER’S MANUAL SB200 Series Inverter High Performance General Space Verctor Control Input 3 Phase 400v class Capacty 1 5 ~ 400kw Version 1 3 Hope S[.]
NOTES ON SAFETY
Notes on Safety
The inverter must not be installed at places with combustibles or in the vicinity of combustibles; otherwise there may cause fire
The inverter must not be installed in an environment exposed to flammable gases; otherwise There may cause explosion
Confirm that the HV indicator lamp is thoroughly extinguished and the positive/negative busbar voltage is below 36V; otherwise there may be a risk of electric shock
Confirm that no wiring operation is permitted unless the power supply is thoroughly disconnected; otherwise there may be an electric shock hazard
Don’t try to connect the DC terminals (P+/N-) directly with a dynamic braking resistor; otherwise there may be a fire hazard
The terminal voltage of the power supply must not exceed the rated voltage; otherwise there may be inverter damage
The earth terminal of the inverter must be properly and reliably earthed in compliance with the applicable national technical specifications; otherwise there may be an electric shock hazard;
(3) Inspection Prior to Connection to Power Supply
Before connecting to the power supply, ensure that all wiring for electrical peripherals is properly installed, with particular attention to safety-critical components such as air circuit breakers and fault alarm devices Proper wiring is essential for the safe operation of the system and to prevent electrical faults Checking wiring integrity prior to power connection helps ensure reliable performance and enhances overall safety.
Prior to connection to the power supply, remember to close the cover of the inverter; otherwise there may be an electrical shock or explosion
The inverter is essential for controlling the high-speed operation of electric motors Before using the inverter at frequencies above the rated motor frequency, it is important to verify that both the motor and electrical components can safely support high-speed performance, ensuring reliable and efficient operation.
(4) Notes on Connection to Power Supply and Operation
Prior to a trial operation, check that all parameters are correctly set
The front cover must not be opened when the power supply is available, for the high voltage within may cause an electrical shock
Do not try to operate an inverter with wet hands; otherwise there may be an electrical shock
To ensure proper inverter self-start functionality, factory settings should be configured to “ALLOWED.” When terminal control is available and operation signals are active, the inverter will automatically self-start upon connection to the power supply, facilitating efficient and reliable operation.
Do not try to start up or shut down the inverter by direct disconnection from the power supply
Reconfigure the relevant parameters after the execution parameters are initialized
When the restart function is activated—such as during fault self-reset or after an instantaneous power failure—it is crucial to avoid approaching the electric motor or mechanical load while the inverter is preparing for startup Ensuring safety during this process prevents accidents and equipment damage, making it essential to stay clear until the inverter has fully re-initialized Proper safety precautions should be followed to avoid risks associated with inverter restarts and motor operation.
(5) Notes on Transportation and Packaging
Do not pile more inverters than allowed by the packing cases
Do not put weights on inverters
Do not leave the cover open while the inverters are in transit
Do not apply forces to the control panel or the cover while the inverters are being handled; otherwise personal injuries or property damage may occur
(6) Disposal on Expiration of Service Life
Dispose of the inverter as industrial waste
Explosions may occur if the electrolytic capacitor within the inverter is being burnt
Toxic gases may be emitted when the plastic parts of the inverter are burnt.
Caution
An SB200 inverter must be used in an environment conforming to the product specification; otherwise there may be a fault or shortened product life
Comparison with Line Frequency Operation
The SB200 series are PWM voltage inverters that produce an output voltage with a specific level of harmonics, affecting overall performance Compared to traditional line frequency power supplies, these inverters can cause slightly higher voltage loss, increased temperature rise, and more noise in the working motor.
When the power supply voltage is relatively high or the motor wiring spans a long distance, it is essential to consider the insulation strength of both the cables and the motor to ensure safety and reliable operation.
Constant-Torque Low-Speed Operation
Prolonged low-speed operation of a conventional inverter-driven motor can lead to increased motor temperatures due to reduced heat dissipation To maintain motor safety and efficiency during extended constant-torque low-speed operations, it is essential to choose a variable-frequency motor or implement forced air cooling solutions Proper thermal management ensures reliable motor performance and prevents overheating under continuous low-speed conditions.
Using an adapted inverter with the motor enables overload protection, enhancing operational safety To prevent damage, ensure the motor matches the inverter's rated capacity; if not, adjust the protective parameters accordingly or implement additional protection measures Proper configuration and protection are essential for safe and reliable motor operation.
Operation at a Frequency above the Rated Motor Frequency
When operating a motor above its rated frequency, users must ensure that the motor bearings and mechanical components can accommodate the increased speed range It is also essential to monitor for potential increases in vibration and noise levels, which may indicate stress on the motor's parts and the need for further inspection or adjustments.
Mechanical devices requiring lubrication, such as the gearbox and gears, may be damaged by deteriorating lubrication caused by prolonged low-speed operation Confirm that prior to lubrication
During load elevation, regenerative torque often occurs, which can trigger inverter shutdowns due to overvoltage protection To prevent this, it is essential to select appropriately rated braking units Proper braking unit selection ensures safe dissipation of regenerative energy, maintaining inverter stability and protecting equipment during load changes Incorporating suitable braking solutions enhances operational safety and reduces downtime caused by overvoltage faults.
Mechanical Resonance Points of Load-Carrying Devices
Load-carrying devices can experience mechanical resonance at specific inverter output frequency ranges, which may lead to vibration issues To mitigate this, installing vibration-resistant rubber pads under the motor’s base plate effectively dampens resonance effects Alternatively, configuring the inverter to operate outside these resonance frequencies helps prevent such vibrations, ensuring smoother operation and prolonging equipment lifespan.
Motor Insulation Check Prior to Connection to the Inverter
Before commissioning or restarting a motor after long shutdowns, it is essential to perform an insulation test using a 500V megger to prevent inverter damage caused by deteriorated winding insulation The insulation resistance should be at least 5MΩ; motors with lower ratings should not be used Since inverters supply power in PWM mode, motors with poor insulation are more vulnerable to insulation damage, highlighting the importance of thorough testing to ensure reliable operation and prevent costly repairs.
Capacitors or Pressure-Sensitive Elements to Improve Power Factor
The inverter's output voltage is PWM-based, so installing power factor correction capacitors or lightning protection resistors at the output terminal can cause inverter trips or component damage It is essential to remove any such capacitors or resistors to ensure safe and reliable inverter operation.
Contactor, etc Installed at the Output Terminal of the Inverter
Ensure that any installation of contactors or similar devices between the inverter’s output terminal and the motor is performed only when the inverter has no power output, as making or breaking connections while the inverter is energized can cause damage Properly switching off the inverter before installing contactors helps prevent potential inverter damage and ensures safe operation Always follow safety protocols and manufacturer instructions to avoid harming the inverter or associated equipment during installation.
Control terminals are recommended for safely managing the startup and shutdown of the inverter, ensuring proper operation It is strictly prohibited for users to directly start or shut down the inverter using circuit-breakers like contactors on the input terminal, as this can lead to equipment damage or safety hazards Proper control methods should always be followed to maintain inverter reliability and safety.
Application beyond the Rated Voltage
The SB200 inverter series should only be used within its specified input voltage range Applying the inverter beyond its rated voltage is not recommended, as it could cause damage or malfunction If higher or lower voltage ranges are required, it is essential to use a suitable step-up or step-down transformer to ensure safe and reliable operation Proper voltage adaptation ensures optimal performance and prevents equipment failure.
Switching from 3-Phase Input to Single Phase Input
Converting from a 3-phase to a single-phase input increases voltage and current ripples in the busbar, which can negatively impact the lifespan of capacitors in the main circuit Elevated ripple levels also degrade inverter performance, highlighting the importance of proper input configuration for optimal system efficiency and reliability.
Switching to a single-phase input is generally not recommended If it becomes necessary to use a single-phase power supply, users must disable phase-failure protection and reduce the inverter's capacity to a maximum of 60% of its original rating For inverters rated at 30kW or higher that require conversion to a single-phase input, it is essential to connect the single-phase input terminals to Terminals R and S; failing to do so will prevent the inverter from operating correctly.
The inverter has an inbuilt lightning overvoltage protector capable of self-protection against induced lightning shocks
Quick startups or shutdowns during inverter operation necessarily induce high-frequency leakage currents, which may sometimes cause misoperations of the leakage protection circuit
In the event of the aforesaid problems, reduce the carrier frequency and the length of the lead-in wire appropriately; besides, the leakage protector must be correctly installed
Keep the following points in mind when installing a leakage protector:
1) It is more proper to install the protector at the input terminal of the inverter and behind the air circuit-breaker (not a fuse circuit-breaker)
2) The selected leakage protector must be insensitive to higher harmonics (sensitivity: Above 30mA) or specially suited for inverter applications If a common leakage protector is selected, it must have sensitivity above 200mA and an action time above 0.1s
1) When the ambient temperature exceeds 40℃, the inverter must be derated by 5% for every increment of one degree Celsius Also, forced external heat dissipation must be provided
2) At 1,000m above sea level, the thinner air will deteriorate the heat dissipation effect of the inverter Therefore, the inverter must be derated by 1% for every increment of 100m
3) When the set carrier frequency exceeds the factory settings, the inverter must be derated by 5% for every increment of 1kHz.
PRODUCT SPECIFICATION
Universal Technical Specification of SB200 Inverter Series
Rated Voltage/Frequency 3-phase, 380V; 50/60Hz
Range Voltage: 320-420V; voltage unbalance: