E6581158
A-22
1
(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 superim-
posed on and burn the ammeter with models having motors of low rated current (several A(ampere) or
less), especially the 400V class low capacity (3.7kW or less) models, because the leak current will in-
crease in proportion to the motor's rated current.
Remedies:
1.Use a meter output terminal in the inverter control circuit.
The output 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.
2.Use the monitor functions built into the inverter.
Use the monitor functions on the panel built into the inverter to check current values.
1.4.4 Installation
Q Installation environment
The VF-S11 Inverter is an electronic control instrument. Take full consideration to installing it in the proper
operating environment.
Danger
Prohibited
• Do not place any inflammable substances near the VF-S11 Inverter.
If an accident occurs in which flame is emitted, this could lead to fire.
Mandatory
• Operate under the environmental conditions prescribed in the instruction manual.
Operations under any other conditions may result in malfunction.
Warning
Prohibited
• Do not install the VF-S11 Inverter in any location subject to large amounts of vibration.
This could cause the unit to fall, resulting in bodily injury.
Mandatory
• 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
may result in fire.
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