TOSHIBA TOSBERT VF-A3 frequency converter

TOSHIBA TOSBERT VF-A3 frequency converter

Overview and Basic Equipment Information

Positioning: The official user manual for Toshiba TOSBERT VF-A3 series high-performance frequency converters, used to guide users in installation, operation, maintenance, and troubleshooting.

Equipment specifications:

Voltage level, power range, core application scenarios

200V level 0.4-55kW small and medium-sized motor drive (such as conveyor, fan)

400V level 0.75-75kW medium and large motor drive (such as pumps and compressors)

Equipment features:

High reliability: Built in current limiting, retry, soft stop, and instantaneous power-off protection functions to reduce the probability of tripping.

Easy to operate: keyboard style operation panel, supports memory commands, basic settings do not require stopping the machine to consult the manual.

Compact design: The research body integrates multiple protection functions, saving installation space.

Model coding rules: Taking "VFA3-2150P" as an example, the meanings of each part are as follows:

VFA3: Series Code (VF-A3 Series)

2: Voltage level (2=200V level, 4=400V level)

15: Capacity (15kW)

0: Special configuration (0=Standard)

P: Panel configuration (P=equipped with operation panel)

Installation and wiring specifications

1. Installation requirements

Installation method: Only supports vertical wall mounted installation. For non vertical installation, please consult a Toshiba representative.

Ventilation gap (Figure 1.1):

Top/bottom: minimum 10cm

Left and right sides: minimum 5cm

Environmental restrictions:

Temperature: -10 ℃~40 ℃ (up to 50 ℃ without casing)

Humidity: ≤ 90%, no condensation

Altitude: ≤ 1000m (3300ft)

Vibration: Acceleration ≤ 0.5G (20-50Hz), amplitude ≤ 0.1mm (50-100Hz)

Special note: Models with 3.7kW and below have a built-in regenerative discharge resistor on the back. Frequent start stop cycles can cause the exhaust temperature to reach 150 ℃. It is recommended to install it on a metal surface for heat dissipation.

2. Wiring process and specifications

Preparation before wiring:

Disconnect the main switch of the distribution panel and confirm that the "CHARGE" light of the frequency converter is off (to avoid electric shock).

Open the front cover: Pull forward and lift up (Figure 1.2).

Main circuit wiring (Figure 1.3):

Terminal Name Connection Object Precautions

L1/R, L2/S, L3/T 3-phase power input cannot be reversed to the motor end (T1/U, etc.), otherwise the equipment will be damaged

T1/U, T2/V, T3/W 3-phase motors require corresponding motor U, V, and W terminals

The grounding wire of the G/E system complies with Class 3 grounding specifications

R1/T1 (200V level), R38/R41 (400V level) control circuit power supply single-phase signal, ensuring independent power supply for the control circuit

Control circuit wiring:

Frequency setting signal: PP (10Vdc reference) RR（0-10Vdc/0-5Vdc）、IV（0-5Vdc/4-20mAdc）， The type needs to be switched through JP1/JP2 jumper (Table 6.1).

Operation control signals: ST (preparation for operation), F (forward rotation), R (reverse rotation), JOG (jog), short circuit the corresponding terminal to CC to achieve the function.

Taboo:

Do not connect power factor compensation capacitors on the power side or motor end.

The control circuit (excluding FLA/FLB/FLC) needs to be insulated from the main circuit to avoid interference.

Operation process and core function settings

1. Operation panel and basic operations

Panel layout (Figure 2.1): including "PANEL CON" LED, MON (monitoring/setting switch), RUN/STOP (run/stop), frequency ± key, parameter setting key (WRT/READ/NEXT, etc.).

Simplify the operation process (trial run, recommended low-frequency startup):

Power ON: When the MCCB is closed, the monitor flashes "OFF" first and then displays "0.0".

Switch panel control: Press the "CTRL" key, and the "PANEL Control" LED will light up.

Set frequency:

Numerical keys: If set to 10Hz, press "1", "0", and "WRT" to display "10" and "FC" alternately.

± key: Long press "△" (increase)/"▽" (decrease), if set to 5.5Hz, press "WRT" to save.

Start/Stop: Press "RUN" to accelerate to the set frequency; Press' STOP 'to slow down and stop.

2. Core Function Settings

(1) Frequency and voltage characteristic settings

Maximum frequency (FH): 30-400Hz (1Hz step size), default 50Hz for 50Hz models and 60Hz for 60Hz models, cannot be modified during operation (requires shutdown).

Torque boost (ub): 0-30% (1% step size), default 3%, used to boost starting torque, excessive can cause overcurrent during startup.

Automatic torque boost (Rub): 0=off, 1=on, automatically adjusts voltage based on load current (Figure 3.4).

Fundamental frequency (uL): 25-400Hz (1Hz step size), set 50Hz for 50Hz motors and 60Hz for 60Hz motors (Table 3.1).

V/f mode (Pt.): 0=constant torque (conveyor), 1=variable torque (fan/pump, energy-saving) (Figure 3.6).

(2) Acceleration, deceleration, and braking control

Acceleration and deceleration time (ACC/DEC):

Range: 0.1-6000 seconds, supports 2 sets of time (ACC1/ACC2, DEC1/DEC2).