SKB3400055 Control Techniques Emerson Nidec Drives 0.55KW 3P 380-480V

SKB3400055 Control Techniques Emerson Nidec Drives 0.55KW 3P 380-480V

1.Overview of the SKB3400055 Control Techniques Emerson

The Control Techniques Emerson SKB3400055 is a general-purpose AC variable-frequency drive from the Emerson Commander SK series. Designed for 380 V to 480 V three-phase industrial applications, it is suitable for speed control of induction motors up to 0.55 kW (0.75 HP).

This product utilizes sensorless vector control technology, enabling precise current control based on load changes in real time. It supports open-loop speed, closed-loop speed, and open-loop torque control modes. It is widely used in industries such as environmental protection, building materials, electronics, and electrical equipment, and is suitable for a variety of applications, including fans, pumps, transmissions, and textile machinery.

2.Core Features:

Core Parameters

Input Voltage: 380–480 VAC ±10%, three-phase
Typical Power: 0.55 kW / 0.75 HP
Rated Output Current: 1.7 A
Overload Capacity: 150% for 60 s
Protection Level: IP20 (built-in heat sink, cabinet-mounted)
Braking Unit: Built-in braking transistor, supports direct connection of an external braking resistor for rapid stopping
Speed ​​Range: Open-loop V/F control 1:100, supports S-curve acceleration and deceleration
Carrier Frequency: Adjustable from 2–16 kHz to reduce motor noise
Operating Temperature: −10°C to +50°C (derating up to +60°C)
Mounting Method: DIN rail or screw mounting, zero-stack side-by-side mounting without requiring lateral clearance

Feature Highlights

Compact bookcase design, only 70 mm wide, saves space in the control cabinet
Integrated two-line LCD keypad with Chinese menu support, allowing for one-click parameter copying/downloading
Built-in Class C3 EMI The filter meets IEC 61800-3 industrial environment requirements and can pass CE certification without external filtering. The standard RS485 communication port supports Modbus RTU and can be upgraded to mainstream busses such as Profibus-DP, DeviceNet, CANopen, and EtherNet/IP via expansion modules. Intelligent fan control: Automatically starts and stops based on radiator temperature, reducing noise and extending fan life. Motor auto-tuning: Available in both static and rotating modes, it automatically matches motor parameters to improve low-speed torque and operating efficiency. The Safe Torque Off (STO) input terminal complies with ISO 13849-1 PL d / SIL2, enabling safe shutdown without a contactor.

Typical Applications

Light industrial equipment such as conveyors, packaging machines, food filling machines, textile printing and dyeing, and woodworking machinery. Energy-saving retrofits for fans and water pumps, replacing traditional valve flow control. Centralized monitoring of multi-machine production lines such as ceramic and plastic extruders via RS485.

Optional Accessories

SK-Keypad-Remote: Handheld remote keypad (3 m) Extension cable)
SM-Profibus-DP, SM-DeviceNet, SM-EtherCAT: Fieldbus expansion modules
SK-CT-BR1 100 Ω / 200 W brake resistor, suitable for 0.55 kW models

Advanced Control Technology: Utilizing sensorless vector control technology, it delivers 150% of rated output torque at a low frequency of 1 Hz, ensuring stable operation under low-speed and heavy-load conditions. It supports multiple control modes: open-loop speed, closed-loop speed, and open-loop torque.

Powerful Programmability and Expandability: Supports soft PLC logic programming (via Logstick and SPYLITE software), allowing users to perform secondary development and customize functions. Flexible modular expansion cards are available for expanded I/O points and various fieldbus communication interfaces, enabling easy integration into automation systems.

Fully Integrated Design and Reliability: The entire series features built-in EMC filters and brake units to effectively suppress electromagnetic interference and enhance system reliability. Comprehensive protection features, including overcurrent, overvoltage, overload, and overtemperature protection, ensure long-term stable operation.

Applications: This series of inverters offers a versatile design suitable for a variety of applications, including fans, pumps, transmissions, and textile machinery. Furthermore, this model has also been used in medical CT drive systems.

3.Product details pictures

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