178B4789
Wake Industrial LLC is not an authorized distributor of this product.
MPN: VLT5072PT5C20STR3DLF00A00C0
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The 178B4789 frequency converter operates on three phases with a mains voltage range of 380-500/460-500 V AC, features an IP20 enclosure class, and includes a local control panel display. Part of the VLT 5000 Frequency Converters series by Danfoss, it has a compact enclosure type and a net weight of 54 kilograms.
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Product Description:
The 178B4789 is a powerful frequency converter. It refers to the product VLT5072PT5C20STR3DLF00A00C0. This unit is manufactured by Danfoss for industrial motor control use. It belongs to the VLT 5000 Frequency Converters series.
The 178B4789 converter is intended for 75 kW or 100 horsepower motors. It can handle a three-phase voltage range of 380 to 500 volts. It runs in high overload torque mode, delivering 160% for 60 seconds. The rated output current is 90 A at 380 to 440 volts. It has an input range of 441 to 500 volts and draws 78 amps. In overload conditions, the max output current can exceed 116 A. The input frequency tolerance spans from 48 to 62 Hz. The output frequency can be changed between 0.5 and 1000 Hz. It produces 0 to 100% of the input voltage as output. It has 8 digital inputs with 24 VDC PNP logic. It supports two analog voltage or thermistor inputs. A separate analog current input provides 0/4 to 20 mA scaling. There are two analog outputs that accept 0/4 to 20 mA signals. Four encoder inputs can handle pulse signals with a frequency of up to 65 kHz. Two programmable relay outputs are provided for logic control. It has perfect galvanic separation and a 24 VDC internal supply. An external 24 VDC input is also accessible. It maintains control precision of ±0.5% in open loop mode. Closed loop control can increase accuracy to ±0.1% at high speeds. Under high torque, the ambient temperature can only rise to 45°C.
The Danfoss 178B4789 enclosure is Compact IP20 with a standard ST hardware configuration. It contains R3 class A1 and B RFI filters. It comes with a DL keypad display by default. The RS-485 communication support is completely enabled. There is no built-in fieldbus in the drive. EN 55011 and EN 61000 standards are used to ensure EMC compliance. It includes precautions against overheating and short circuit issues.
Frequently Asked Questions about 178B4789:
Q: What is the advantage of having 0–100% output voltage in 178B4789 Frequency Converter?
A: This allows precise control over motor speed and torque delivery. It supports variable load operations without hardware changes.
Q: How does sensorless vector control in this drive improve performance?
A: It enhances dynamic response and torque control without using external sensors. This reduces cost and improves system reliability.
Q: Why does the 178B4789 Frequency Converter include galvanic isolation?
A: Galvanic isolation protects control circuits from electrical noise and surges. It improves safety and signal integrity in industrial environments.
Q: How does the ±0.1% closed loop speed accuracy of 178B4789 Frequency Converter help industrial applications?
A: It supports consistent motor speed in critical systems like conveyors or extruders. This leads to high process stability and reduced error margins.
Q: How does the 3C2 environment class rating benefit 178B4789 Frequency Converter installations?
A: It allows usage in environments with chemical exposure or airborne contaminants. This increases the lifespan of uncoated electronic components.
