Siemens SINAMICS G120 PM240-2 55kW AC Drive

Technical Overview

380-480V 55kW (LO) / 45kW (HO) AC drive with integrated braking chopper, IP20, and vector/V/f control for precise motor regulation.

Key Features

Supports vector and V/f (voltage/frequency) control for precise motor speed and torque regulation.
Output frequency range of 0 to 550 Hz for V/f control and 0 to 200 Hz for vector control.
Input voltage range of 380 to 480 V AC ±10% and line frequency of 47 to 63 Hz.
Rated power of 55 kW (75 hp) for Low Overload (LO) and 45 kW (60 hp) for High Overload (HO) settings.
Maximum output current of 180 A.
Designed for seamless integration into existing industrial automation systems.
Includes protection features such as overcurrent, thermal overload, and fault diagnostics.
Compact Frame Size E (FSE) design ensures high power density, saving cabinet space.
Rugged reliability, rated for operation in ambient temperatures up to +50°C (HO).
IP20 degree of protection / UL open type.

Technical Specification Matrix

Parameter	Value
Input Number of Phases	3 AC
Input Line Voltage	380 ... 480 V AC ±10%
Input Line Frequency	47 ... 63 Hz
Input Rated Current (LO)	104 A
Input Rated Current (HO)	94 A
Output Number of Phases	3 AC
Output Rated Voltage	400V IEC / 480V NEC
Output Rated Power (LO)	55 kW (75 hp)
Output Rated Power (HO)	45 kW (60 hp)
Output Rated Current (LO)	110 A
Output Rated Current (HO)	90 A
Max. Output Current	180 A
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0 ... 200 Hz
Output Frequency (V/f Control)	0 ... 550 Hz
Low Overload Capability	110% for 57s, 150% for 3s (cycle time 300s)
High Overload Capability	150% for 57s, 200% for 3s (cycle time 300s)
Power Factor λ	0.95
Efficiency η	0.98
Sound Pressure Level (1m)	71 dB
Power Loss	1.54 kW
Cooling	Internal air cooling
Cooling Air Requirement	0.083 m³/s (2.931 ft³/s)
Installation Altitude	1,000 m (3,280.84 ft)
Ambient Temperature Operation (LO)	-20 ... 40 °C (-4 ... 104 °F)
Ambient Temperature Operation (HO)	-20 ... 50 °C (-4 ... 122 °F)
Relative Humidity (Max. Operation)	95 % RH, non-condensing
Degree of Protection	IP20 / UL open type
Frame Size	FSE
Line Side Connection	Screw-type terminal
Line Side Conductor Cross-section	25 ... 70 mm² (AWG 4 ... AWG -1)
DC Link Connection	Screw-type terminals
DC Link Conductor Cross-section	10 ... 35 mm² (AWG 8 ... AWG 2)
Max. Motor Cable Length (Shielded)	200 m (656.17 ft)
Max. Motor Cable Length (Unshielded)	300 m (984.25 ft)
Compliance with Standards	UL, cUL, CE, C-Tick (RCM), SEMI F47
Physical Weight (kg)	26.4
Dimensions L x W x H (cm)	59.5 x 40 x 30

Industrial Applications

1. High-Speed Conveyor Systems with Dynamic Braking

This power module is ideal for controlling large conveyor belts in manufacturing or logistics facilities that require precise speed control and frequent acceleration/deceleration cycles.

Problem Solved

The high rated power (up to 55kW LO) ensures it can drive heavy loads efficiently. The integrated braking chopper facilitates dynamic braking, reducing wear on mechanical brakes and improving stopping accuracy. Vector control (0-200 Hz) provides precise torque and speed regulation for smooth operation, while the robust overload capacity (200% for 3s in HO) handles high starting torques. Its IP20 rating makes it suitable for enclosed cabinet installations common in these environments.

Conveyor beltDynamic brakingVector controlHigh starting torqueSpeed regulation55 kWIP20

2. Industrial Pump and Fan Control in Critical Infrastructure

Suitable for controlling large industrial pumps in water treatment plants or powerful fans in HVAC systems, where energy efficiency, stable flow, and pressure control are critical.

Problem Solved

The drive's high efficiency (η = 0.98) significantly contributes to energy savings for continuously running motors. V/f control (0-550 Hz output frequency) provides efficient and stable operation for centrifugal pumps and fans. The wide input voltage range (380-480V ±10%) accommodates typical industrial power grids, and its operation in ambient temperatures up to 40°C (LO) ensures reliability in varied plant environments.

Industrial pumpsHVAC fansEnergy efficiencyV/f controlStable flow380-480V55kW98% efficiency

3. Extruders and Mixers in Process Industries

This power module can precisely control the speed and torque of extruders, mixers, or agitators in chemical, plastics, or food processing industries, where consistent material processing is essential.

Problem Solved

The high overload capacity (150% for 57s, 200% for 3s in HO) allows the drive to handle sudden load changes and high torque demands common during mixing or extrusion processes. Vector control ensures accurate speed and torque regulation for consistent product quality. The robust design for ambient temperatures up to 50°C (HO) and IP20 protection are suitable for installation in control cabinets within demanding industrial processing environments.

ExtrudersMixersHigh torqueOverload capabilityVector controlProcess control45 kW (HO)IP20-20 to 50°C