Toshiba VF-FS1 instruction manual Installation environment

E6581381

(2)CT and ammeter

If a CT and ammeter are connected externally to detect inverter output current, the leak current's high frequency component may destroy the ammeter. If the wires are more than 50 meters long, it will be easy for the high frequency component to pass through the externally connected CT and be superimposed on and burn the ammeter with models having motors of low rated current (several A(ampere) or less), especially the 400V class low capacity (5.5kW or less) models, because the leak current will increase in proportion to the motor's rated current.

Remedies: 1

1.Use a meter output terminal in the inverter control circuit.

The load current can be output on the meter output terminal (FM). If the meter is connected, use an ammeter of 1mAdc full scale or a voltmeter of 7.5V-1mA full scale.

0-20mAdc (4-20mAdc) can be also output. ⇒ See section 5.4. 2.Use the monitor functions built into the inverter.

Use the monitor functions on the panel built into the inverter to check current values. ⇒See section 8.1.1.

1.4.4Installation

■Installation environment

The VF-FS1 Inverter is an electronic control instrument. Take full consideration to installing it in the proper operating environment.

Danger

•Do not place any inflammable substances near the VF-FS1 Inverter. If an accident occurs in which flame is emitted, this could lead to fire.

Prohibited

•Operate under the environmental conditions prescribed in the instruction manual. Operations under any other conditions may result in malfunction.

Mandatory

Warning

•Do not install the VF-FS1 Inverter in any location subject to large amounts of vibration. This could cause the unit to fall, resulting in bodily injury.

Prohibited

•Check to make sure that the input power voltage is +10%, -15% of the rated power voltage written on the rating label (±10% when the load is 100% in continuous operation) If the input power voltage is not

+10%, -15% of the rated power voltage (±10% when the load is 100% in continuous operation) this

Mandatory may result in fire.

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