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Test and measurement equipment and
automation systems for industrial facilities and CNC machines
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Variable frequency drive VC-4T055-E

SKU VC-4T055-E
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Specifications
Rated power, kW  55 kW
Rated power, hp  70 hp
Apparent power, kVA  85 kVA
Rated input current, A  113 A
Rated output current, A  112 A
Built-in braking unit  Optional
Control mode  V/F; SVC
Carrier frequency  0.6–16 kHz
Overload capacity  150% of rated current for 60 s; 180% for 2 s
Torque boost  Automatic torque boost; manual boost: 0.1–30.0%
Starting torque (V/F)  1 Hz / 100% of rated torque
Starting torque (SVC)  0.5 Hz / 150% of rated torque
Speed control range (V/F)  1:50
Speed control range (SVC)  1:100
Speed holding accuracy (V/F)  ≤1% of rated synchronous speed
Speed holding accuracy (SVC)  ≤0.5% of rated synchronous speed
Input voltage range  Single-phase supply: 200–240 V; three-phase: 380–480 V. Permissible deviation: −15…+10%
Input frequency range  50/60 Hz; permissible deviation: ±5%
Output voltage range  0 to input voltage; deviation <5%
Output frequency range  SVC: 0–500 Hz; V/F: 0–1000 Hz; deviation ±5% of maximum frequency
Start command channel  Three methods: control panel, control terminals or serial interface; the method can be switched
Frequency reference source  Digital reference, panel pulse potentiometer, linear or nonlinear voltage, analog current, serial communication, etc.; sources can be switched
Auxiliary frequency reference source  Several auxiliary frequency sources; frequency combination and fine adjustment are supported
Digital input terminals  Four inputs DI1–DI4; DI4 supports high-speed pulses up to 20 kHz and NPN/PNP switching
Analog input terminals  Two inputs AI1–AI2; they can be assigned as DI via parameters. A jumper selects current or voltage input for AI2
DC braking function  DC braking frequency: 0–60 Hz; time: 0–60 s; braking current: 0–150%
V/F characteristic  Linear, multipoint, quadratic, power-law 1.1–1.9 or fully separated V/F characteristic
Acceleration and deceleration curves  Linear or S-curve acceleration and deceleration; time range: 0–6500 s
Multi-speed mode  Up to 16 preset speeds set via the control terminals
External control panel  Standard function: upload and download drive parameters for quick copying of settings
Built-in PID controller  Enables closed-loop process control
Automatic Voltage Regulation (AVR)  Standard function: automatic current and voltage limiting to prevent frequent trips due to overvoltage
Overvoltage stall prevention  Automatic current and voltage limiting to prevent frequent trips due to overvoltage
Fast current limiting function  Standard function reduces overcurrent trips and supports normal operation
Torque limit and control  Automatic torque limiting during operation to prevent frequent overcurrent trips
Peripheral self-diagnostics at power-on  Monitoring of peripheral circuits, including ground faults and short circuits
Timer control function  Timer control; setting range: 0–65000 h
Protection functions  Detection of motor short circuits at startup; protection against input and output phase loss, overcurrent, overvoltage, undervoltage, overheating and overload
LED display  Five-digit LED display
Parameter lock  Read-only parameter mode to prevent accidental changes
Altitude above sea level  Up to 1000 m without derating; above 1000 m, power derating of 1% per 100 m; maximum altitude 2000 m
Humidity  ≤95% RH; non-condensing
Vibration  Vibration acceleration below 0.6 g
Storage temperature  −25…+60 °C
Ambient temperature  −20…+45 °C; above +45 °C, derate power by approximately 1% per 1 °C; maximum +50 °C
Installation conditions  Indoors; away from direct sunlight, dust, corrosive or flammable gases, oil mist, water vapour, water droplets and salts
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