Product Overview
The medium voltage variable speed drive system undergoes rigorous inspection and performance testing before leaving the factory, ensuring the quality and performance of each individual unit shipped. An integrated design concept has been adopted, including transformer cabinets, power cabinets, control cabinets, optional bypass cabinets, and all internal connections. Users only need to connect the medium-voltage input/output cables, low-voltage control power supply, and control signal lines. The system features integrated transportation and unilateral maintenance, making it convenient and user-friendly for on-site installation, maintenance, and commissioning.
Technical features
Mining Flameproof Design
The enclosure employs a flameproof design, complying with national mining product safety certification, ensuring safe operation in mine environments with explosive hazardous gases such as methane and coal dust.
High Strength & High Protection
The robust cabinet structure can withstand mechanical shock and vibration during underground transportation and installation. With a high protection rating of IP65, it effectively defends against high humidity, water spray, and dust in underground environments.
Environmental Adaptability
Designed for a wide temperature range (-5°C to +40°C) and equipped with high-performance heating and cooling systems, it adapts to complex underground climate conditions. The units feature a semi-sealed structure, providing strong environmental adaptability and high reliability.
Efficient Maintenance & Reliability
Drawer-type Modular Structure
The innovative drawer-type cabinet structure supports quick plug-and-play of power units, reducing maintenance time by 50%, making it ideal for use in confined underground spaces.
Film Capacitors
The unit DC support uses metallized film capacitors, which offer higher reliability, maintenance-free operation, and a longer lifespan (up to 10 years) compared to electrolytic capacitors.
Automatic Unit Bypass
Using neutral drift technology, it can automatically and seamlessly bypass faulty units, ensuring continuous operation without affecting normal production and maintaining the continuity of underground operations.
Intelligent Control & Cloud Connectivity
RENLE medium voltage variable speed drive leverages industrial Ethernet and 5G technology, enabling cloud-edge intelligence. It supports remote monitoring, data analysis, fault prediction, and efficient technical support, empowering mine digitalization.
The true-color touchscreen, multi-language support, and virtual gauges for real-time display of key parameters, along with clear text diagnostics, facilitate operation and troubleshooting by underground personnel.
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Model Description
Typical Applications
The RENLE medium voltage variable speed drive is widely used in various mining applications, including:
- Main Ventilation Fans
- Main Drainage Pumps
- Mine Hoists
- Belt Conveyors
- Compressors
- Local Ventilation Fans (must meet relevant explosion-proof ratings)
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We are committed to providing global mining customers with safe, efficient, and intelligent medium-voltage VSD solutions, contributing to the development of green, safe, and intelligent mines.
Technical Parameters
|
Name |
Item |
Specification |
|
Input |
1000 Series Power |
3-phase 6kV/10kV, frequency: 50/60Hz |
|
Input voltage range |
Voltage: -10% to +10%; Frequency: ±2% |
|
|
Output |
1000 Series |
3-phase 6kV/10kV, frequency: 50/60Hz |
|
Frequency |
0~ 50/60Hz |
|
|
Setting resolution |
0.01 Hz |
|
|
Overcurrent |
120% of rated output current for 1 minute every 10 minutes; |
|
|
Control |
Control method |
V/F control with PG vector control and without PG vector control. |
|
Synchronous |
The frequency converter follows the voltage phase and frequency of the power grid, achieving a state of grid connection and smooth switching from frequency converter to power frequency without impact |
|
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Torque |
Automatic torque boost during startup to reach above 150%. |
|
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Slip compensation |
Compensates for speed drop under load to enhance mechanical robustness. |
|
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Upper and lower |
Upper and lower frequency limits can be set. |
|
|
Skip frequency |
Skip frequency can be set in 3 groups. |
|
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Speed tracking |
The inverter can automatically search for the motor speed and smoothly restart operation when the motor is coasting due to power loss. |
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Acceleration and |
Acceleration and deceleration time can be independently set from 0.1 to 3600 seconds. |
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Acceleration and |
Linear or S-curve profiles can be selected to meet various application requirements. |
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Operating modes |
Local operation, on-site operation, remote operation. |
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Stopping methods |
Option to choose between coasting stop or deceleration stop. |
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PID closed-loop |
Can be applied to various closed-loop control systems such as flow, pressure, temperature, and |
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Neutral drift |
By bypassing a power unit and using neutral drift technology, the three-phase output stays |
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Automatic unit |
When a unit malfunctions, the inverter can automatically bypass the faulty unit and continue operating using neutral drift technology without the need for manual intervention. If more than two units |
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Power failure |
In the event of an abnormal power outage, the inverter can automatically restart and restore to its |
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Frequency setting |
Analog input signal setting: Configurable via a 4-20mA current signal. Multiple frequency segment |
|
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Fieldbus |
Modbus, Tcp/ip, PROFIBUS-DP |
|
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Operating state |
Relay output: selectable to indicate operating states such as running, stopped, fault, etc. |
|
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During operation/stop |
Display frequency, current, voltage, etc. |
|
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During setting |
Display the set menu number or set parameter value |
|
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During functional |
Display active function information or prompts. |
|
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During alarms, |
Display various alarms and faults. |
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Overload protection |
To monitor the output current of the inverter and protect the inverter in case of overload. |
|
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Overvoltage |
To detect the overvoltage of the DC busbar unit and protect the inverter in case of input overvoltage. |
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Surge voltage |
To monitor surge voltages between input power lines and line-to-ground, protecting the inverter. |
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Under-voltage |
To monitor the input voltage and protect the inverter in case of under-voltage. |
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Overheat protection |
To monitor the temperature rise of the heat sink and protect the inverter when it exceeds the set value. |
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Short-circuit |
To monitor short circuits or overcurrent on the output side of the inverter, protecting the inverter. |
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Motor overload |
To monitor the motor for overload during operation and protect the motor. |
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Open phase |
To monitor the input voltage for phase loss and protect the inverter. |
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Place of use |
Indoors, at an altitude below 1000 meters, with no corrosive or flammable gases; free from dust, oil mist, water droplets, etc., preventing direct sunlight exposure, and without strong magnetic field interference. Altitudes above 1000 meters require derating for use. |
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Operating |
-5℃+40℃ |
|
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Operating humidity |
5~95%RH (non-condensing) |
|
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Vibration |
≤0.5g |
|
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Storage temperature |
-40℃+70℃ |
|
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Ingress protection |
IP30 (Please specify other protection ratings when ordering) |
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