Danfoss FC-051P18KT4E20H3BXCXXXSXXX Inverter

Featuring compact structure, high-efficiency control and reliable performance, Danfoss FC-051P18KT4E20H3BXCXXXSXXX inverter delivers outstanding performance in fields including fans & water pumps, material handling, food & textile industry, water treatment, achieving an average energy-saving rate of 30-50%. It also extends service life of equipment, improves product quality and cuts maintenance costs. Reasonable configuration shall be conducted according to load characteristics, ambient conditions and control requirements during model selection to maximize its technical advantages.

1. Model Code Definition

2. Core Technical Specifications

3. Full Series Model List (380-480V Three-phase)

4. Cross-brand Equivalent Model Comparison

Obsolete Replacement: FC-051 is still mainstream without direct discontinued substitutes. For function upgrade, choose Danfoss FC-301 series with richer functions and support for PROFINET and other advanced communication protocols.

5. Application Environment & Industry Cases

Applicable Scenarios

Fans & Water Pumps: HVAC systems, water treatment plants, cooling towers, realize 30%-50% energy saving via variable frequency speed regulation

Material Conveying: Conveyors, hoists, packaging machinery, achieve smooth start/stop and precise speed control

Food & Beverage Industry: Filling lines, labeling machines, sterilization equipment, adapt to humid environment with PCB coating protection

Textile Machinery: Spinning machines, weaving machines, satisfy low-speed high-torque demands

Small Machine Tools: Drilling machines, milling machines, grinders, realize accurate speed adjustment

Non-recommended Scenarios

Heavy-duty impact loads: Such as crushers and punch presses (FC-302 series is recommended)

Explosion-proof occasions: Special explosion-proof models required (FC-051 has no explosion-proof certification)

Altitude above 1000m: Derating operation needed (1% power reduction per 100m rise)

Ambient temperature over 50°C: Additional cooling measures or derating operation required

Typical Application Cases

1. Constant Pressure Water Supply System

Adopt FC-051P18KT4 to control 18.5kW water pump with closed-loop control via pressure sensor, realizing 40% energy saving, stabilizing pipeline pressure and extending equipment service life.

2. Packaging Production Line

Four sets of FC-051 series inverters including 18.5kW model are applied to control conveyor speed for synchronous operation, lowering product damage rate and greatly reducing downtime frequency.

3. Central Air-conditioner Fan System

Applied in shopping mall air conditioner fans to adjust rotating speed automatically by ambient temperature, saving about 28,000 RMB electricity fee annually per unit and reducing operating noise.

6. Air Freight Compliance & Certification

Air Freight Regulations

Built-in Capacitor: Equipped with DC bus electrolytic capacitors without lithium batteries, UN38.3 test report is not required

Transport Classification: Non-dangerous goods, deliverable as common electronic products by air

Packaging Requirements

Power off completely with capacitors discharged for more than 5 minutes

Fixed in anti-static package to avoid collision damage

Mark with labels of “Fragile Electronic Equipment” and “This Side Up”

Main Certifications

7. Common Faults & Troubleshooting Guide

8. Selection Rules & Quick Tips
9. Power Matching: Inverter rated current ≥ 1.1 times motor rated current to cope with starting impact
10. Voltage Confirmation: Input voltage shall stay within 380-480V with fluctuation ≤±10%
11. Brake Configuration: Models with code B have built-in brake choppers, external brake resistors required (power ≥ 30% of motor power)
12. Heat Dissipation: Keep ventilation space over 10cm for M5 frame; derate 10% power per 5°C rise above 40°C
13. Communication Expansion: Additional Modbus/Profibus modules need separate purchase for network communication
14. Recommended Key Accessories

Full Analysis on Application Cases of Danfoss FC-051P18KT4E20H3BXCXXXSXXX (18.5kW) Inverter

1. Overview of Core Application Fields

This 18.5kW/37A/380-480V inverter with built-in brake chopper and coated PCB board is widely applied relying on VVC+ vector control, IP20 protection and high cost performance:

HVAC industry: Central air conditioner fans, cooling towers, water pumps

Water treatment: Constant pressure water supply, aeration tanks, sludge return pumps

Material handling: Heavy-duty conveyors, elevators, logistics sorting lines

Food industry: Filling machines, sterilization equipment, packaging machines

Textile industry: Spinning machines, weaving machines, setting machines

Building material machinery: Mixers, light-duty crushers

2. Detailed Introduction of Five Typical Application Cases

Case 1: Constant Pressure Water Supply for Residential Communities

Original power frequency water supply system suffered from severe pressure fluctuation, high power consumption and frequent pump startup-stop. After adopting FC-051 constant pressure frequency conversion control system with pressure sensor feedback, it realizes sleep & wake-up automatic operation, cutting daily power consumption greatly, stabilizing water supply pressure and prolonging pump service life obviously.

Case 2: Central Air-conditioner Fan System in Shopping Malls

Replace fixed-speed fan operation with variable frequency temperature closed-loop control, set minimum frequency to avoid fan surging, realize intelligent speed regulation according to indoor temperature, save massive electricity cost annually and lower operating noise effectively.

Case 3: Food Packaging Production Line Multi-machine Linkage

Adopt multi-speed regulation and synchronous follow-up control to match operating speed of different conveying equipment. Built-in brake chopper achieves rapid stop, reduces material stacking and product damage rate, and improves overall production efficiency. Coated PCB adapts to humid and dusty food workshop environment.

Case 4: Spinning Machine Control System in Textile Mill

Replace traditional slip speed regulating motor with VVC+ vector control inverter, realize high torque output at low speed, broaden speed regulation range, promote motor operating efficiency, reduce yarn breakage rate and cut daily maintenance frequency.

Case 5: Aeration System for Sewage Treatment Plant

Match dissolved oxygen sensor to build PID closed-loop control system, automatically adjust fan air volume to keep dissolved oxygen content in optimal range, stabilize sewage treatment effect, reduce invalid energy consumption and lower equipment abrasion.

3. Application Scene Matching Table

4. Key Selection Points for Practical Application
5. Match inverter current reasonably according to actual motor load
6. Select models with built-in brake units for frequent start-stop and fast stop working conditions
7. Choose U/f control mode for fan & pump loads, VVC+ vector control for transmission and processing equipment
8. Prioritize coated PCB models for humid, dusty and corrosive sites
9. Select matched external accessories and control panels according to on-site debugging and remote control demands