178B8587
Wake Industrial LLC is not an authorized distributor of this product.
MPN: VLT2881PT4B20SBR0DBF00A00C1
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The 178B8587 is a low voltage drive manufactured by Danfoss. As part of the VLT 2800 Low Voltage Drives series, it offers a power rating of 15.0 kW / 20 HP and supports supply voltages of 3 x 380-480 V. The drive features an enclosure rated at IP20 and provides a starting torque of 160% for 1 minute.
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Product Description:
The 178B8587 is a compact variable speed drive designed for industrial machines by Danfoss with the specific model code VLT2881PT4B20SBR0DBF00A00C1. It belongs to the VLT 2800 series and delivers a nominal power of 20.0 HP. The drive operates on a three-phase mains supply with an input voltage range of 380 - 480V and tolerance of ±10%, along with supported frequencies of 50/60 Hz for global compatibility.
The 178B8587 drive is designed in a cabinet book style format, with an enclosure rating of IP-20 that makes it suitable for indoor environments where controlled cabinet conditions are present. It uses a D-frame structure with overall dimensions of 505 mm height, 200 mm width and 244 mm depth. The unit carries a net weight of 17.0 kg and it is supplied with standard hardware that includes an integrated brake chopper but missies out an RFI noise filter from its assembly. It also does not provide fieldbus option and no additional application options are included either. This 178B8 drive comes with a built-in SLCP display for parameter access and monitoring. Its printed circuit boards are supplied with protective coating to improve durability and it offers a rated kVA capacity of 22.20. The unit’s leakage current is more than 3.50 mA that needs proper earthing for safe operations and it is equipped with heavy DC link capacitor assembly that remains charged even after the power cutoff.
The 178B8587 drive connects to main supply lines at its terminal 91, 92, 93, 94 that are labelled as L1, L2, L3 and PE. Its relay output point supports 250 VAC load with a rating of maximum 3 A and its analog output is available at terminal 42 that supports up to 20 mA. The unit uses VLT motion control tool MCT 10 for setting up with PC for parameterization and its front panel possess navigation keys as well for operator interfacing.
Frequently Asked Questions about 178B8587:
Q: What is the purpose of the heavy DC-link capacitor in VLT2881PT4B20SBR0DBF00A00C1 (178B8587)?
A: It stores energy to smooth out voltage fluctuations and maintain stable DC bus voltage during load changes. This helps in reducing voltage ripple and improves drive reliability under dynamic loads.
Q: How does the integrated brake chopper benefits?
A: The brake chopper diverts excess regenerative energy when the driven load decelerates, preventing over-voltage faults. It ensures controlled braking without requiring external braking resistor or manual intervention.
Q: Why is protective coating applied on the printed circuit boards in the 178B8587 drive?
A: The coating helps resist moisture, dust, and chemical contaminants, extending PCB life in harsh industrial environments. It improves insulation and reduces corrosion on solder joints and component leads.
Q: What safety implications does the leakage current > 3.5 mA have for VLT2881PT4B20SBR0DBF00A00C1?
A: Its higher leakage current requires proper earthing/grounding to avoid shock hazards and interference. Without adequate grounding, sensitivity of protective devices or personnel risk might increase.
Q: How important is the SLCP display onboard?
A: The SLCP display allows local parameter access, monitoring, and diagnostics without needing external PC-tool. It aids fast commissioning and troubleshooting at the drive itself.
