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137U3997 Danfoss iC7-Automation 355kW/500 3 phase low-harmonic drive
Danfoss 137U3997 iC7-Automation enclosed drive, a 355 kW three phase low-harmonic variable frequency drive designed for demanding industrial motor control and automation applications.
£69,098.25
Why Choose the Danfoss 137U3997 iC7-Automation Enclosed Drive?
The Danfoss 137U3997 is a high-performance iC7-Automation enclosed drive designed for demanding industrial motor control applications requiring efficient, reliable and low-harmonic operation. As part of the advanced Danfoss iC7-Automation drive range, this enclosed variable frequency drive is engineered for precise control of large three-phase motors in automation, process and infrastructure environments.
This air-cooled enclosed drive combines robust cabinet construction with advanced Danfoss drive technology, helping support dependable operation in industrial electrical rooms and plant drive areas. Its low-harmonic configuration helps improve power quality, while integrated Modbus TCP communication and functional safety options make it suitable for modern automation systems.
With a rated output power of 355 kW / 500 HP, a 658 A current rating and a three-phase 380–500 V AC supply, the Danfoss 137U3997 is ideal for large motors used in pumps, fans, compressors, conveyors and process machinery. Its IP54 / UL Type 12 enclosed format provides enhanced protection for demanding industrial installations.
Key Advantages
- High-power enclosed variable frequency drive for demanding industrial applications.
- 355 kW / 500 HP rated output power for large motor control systems.
- 658 A current rating suitable for heavy-duty automation equipment.
- Three-phase 380–500 V AC input for industrial power networks.
- Low-harmonic drive design supporting improved electrical power quality.
- IP54 / UL Type 12 enclosure for robust enclosed installation.
- Integrated STO and SS1-t functional safety with fieldbus support.
Key Features
- Danfoss iC7-Automation enclosed drive series.
- 355 kW / 500 HP rated output power.
- 658 A current rating.
- Three-phase 380–500 V AC mains voltage.
- Low-harmonic drive configuration.
- IP54 / UL Type 12 protection rating.
- EMC Category C3 classification.
- Modbus TCP OS7MT communication interface.
- Control Panel 2.8 OPX20 included.
- Standard I/O and relay option OC7C1.
- Common-mode output filter included.
Reliable Low-Harmonic Motor Control for Industrial Systems
Variable frequency drives such as the Danfoss 137U3997 regulate motor speed and torque by controlling output voltage and frequency. This helps improve process control, reduce mechanical stress and optimise energy use across large motor-driven systems.
The iC7-Automation enclosed drive platform is designed for demanding applications where uptime, power quality and automation integration are essential. Its low-harmonic configuration supports cleaner electrical performance, while the enclosed cabinet format helps simplify installation in industrial plant rooms and control environments.
Typical Applications
- Large industrial pumps and pumping stations.
- Fans, blowers and ventilation systems.
- Compressors and process equipment.
- Conveyors and heavy material handling systems.
- Water and wastewater treatment plants.
- Industrial production and process automation.
- Plant drive rooms and infrastructure motor control systems.
Technical Specifications
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| Power | 355 kW | |
|---|---|---|
| Current | 658 A | |
| Voltage | 500 V | |
| Phase | Three Phase | |
| IP Rating | IP54 | |
| Series | iC7-Automation | |
| Product code | 137U3997 | |
| Product type | Enclosed variable frequency drive | |
| Drive category | Air-cooled enclosed drive | |
| Drive configuration | Low-harmonic drive | |
| Rated output power | 355 kW / 500 HP | |
| Current rating | 658 A | |
| Input voltage | 380–500 V AC | |
| Input phases | 3-phase | |
| Input frequency | 50 / 60 Hz | |
| Output frequency | 0–599 Hz | |
| Protection rating | IP54 / UL Type 12 | |
| EMC category | C3 | |
| Frame size | AE11 + IE11 | |
| Functional safety | STO, SS1-t, fieldbus | |
| Control panel | Control Panel 2.8 OPX20 | |
| Standard I/O | I/O and Relay Option OC7C1 | |
| Output filter | Common-mode Filter OFXC1 | |
| Cooling method | Air cooled | |
| Dimensions (H × W × D) | approx. 2305 × 1608 × 685 mm | |
| Net weight | approx. 1147.9 kg | |
| Gross weight | approx. 1437.9 kg | |
| EAN | 5715253723990 |
Frequently Asked Questions
What is the Danfoss 137U3997 used for?
The Danfoss 137U3997 is used to control the speed and torque of large three-phase AC motors in demanding industrial automation, process and infrastructure applications.
What motor power is supported by this drive?
This enclosed drive has a rated output power of approximately 355 kW / 500 HP.
What supply voltage does the drive require?
The Danfoss 137U3997 operates from a three-phase 380–500 V AC supply.
What protection rating does this drive have?
The drive has an IP54 / UL Type 12 enclosed protection rating for robust industrial installations.
What safety features are included?
The drive includes Safe Torque Off (STO) and SS1-t functional safety features with fieldbus support.
Trusted by Industrial Automation Engineers Worldwide
Danfoss iC7-Automation enclosed drives are used by engineers and plant operators to deliver reliable high-power motor control, efficient operation and flexible integration in demanding industrial systems.
