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KD730 Space-saving book-style structure frequency converter

◆Newly designed structure

Book-type layout enables side-by-side installation, significantly reducing cabinet footprint

◆Superb overload capacity

120% of rated current for continuous operation; 160% rated current, sustainable for 60s

◆Low temperature rise

Full series temperature rise controlled within 40°C with adequately rated cooling fans and heatsinks.

Optimized vector control technology

Fast dynamic response with stable torque output during low-frequency operation. Over 30 built-in fault protection features ensure system stability and safe operation.

◆ The parameter copying function has been added, which greatly facilitates the speed adjustment of the equipment.

By using an encoder for speed control, the speed adjustment of the keyboard potentiometer achieves higher precision.

◆ At low frequencies, it provides greater torque, making it suitable for a wider range of applications.



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Technical specifications

ItemSpecification
Product seriesGeneral vector type
StructureProtection ratingIP20
Cooling methodForced air cooling / natural cooling.
Input power supplyInput voltage  1AC 220V, 3AC 220V,   3AC 380V,    3AC 480V
Input frequency  50/60Hz
Allowable variation rangeVoltage: ±20%; Frequency: ±5 Hz.
Low voltage protection pointUndervoltage trip set at -20% of rated voltage, determined by DC bus voltage
Output power supplyPower factor Capacitive load leading type
Rated capacity/rated currentG/S series: 160% for 1 min; F series: 120%; Z series: 200%
Trip currentInstantaneous trip at 200% rated current for G/S series; 150% for F series.
Temperature protectionTrip at 85°C.
Control and output specificationsControl mode  V/f control
  Sensorless vector control
  Torque control
Operation command mode  Keypad control
  Terminal control
  Serial communication control (Modbus)
Speed control precision ±0.5% (SVC)
Energy consumption brakingBuilt-in brake unit for ≤37 kW; external brake unit for ≥45 kW.
DC braking and accel/decel time  Brake voltage adjustable 5~30%, brake frequency 0.5~50Hz, brake time 0.0~25.0s. Accel/decel time 0.1~6553s.
Low-frequency torque compensation Adjustable 0~30%, auto torque boost, customizable V/F curve.
Standard functionsSpeed tracking, coast-to-stop, PID control, AVR (auto voltage regulation), 16-step speed, torque/speed control, skip frequency, torque limit, auto multi-step, UP/DOWN control, swing frequency, dual-signal superposition, auto reset, timer, flip-flop.
Control signalProgrammable analog input(s)  2 analog inputs AI1~AI2: 0~10V or 4~20mA input
Analog output(s) 2 analog outputs, AO1/AO2: 0~10V or 4~20mA output
Digital input(s)5 multi-function programmable digital input terminals (incl. HDI pulse input terminal)
Digital output(s) HDO and DO open-collector output; HDO can be used as pulse output terminal.
Communication interfaceRS-485Supports standard RS-485 communication — Modbus RTU protocol.
Protection functionStandard functionsOvercurrent, overload, and short-circuit protection; overvoltage and undervoltage protection; overheat protection; ground fault protection; output phase loss protection; input phase loss protection.
Display functionSeven-segment displayOperating frequency, setpoint frequency, DC bus voltage, output voltage, motor speed, output power, output torque, PID setpoint, PID feedback, and more.
Overload accumulation, output power limit, output frequency/speed conversion, DC bus voltage, output voltage, temperature, and more.
Installation Environment RequirementsAmbient temperature  -10~50°C, without direct sunshine.
Humidity  90%RH or less (non-condensing)
Surrounding environmentNo corrosive, flammable, explosive, or hygroscopic dust; lint and fibers must not accumulate.
Vibration0.5 gm or below
Altitude  ≤1000M: output rated power, >1000M: output derated
Storage temperature  -20~60°C


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