12 SF01U
6.2 EXPLOSION PROOF APPLICATIONS
Explosion proof motors that are not rated for inverter use lose their certification when used
for variable speed. Due to the many areas of liability that may be encountered when dealing
with these applications, the following statement of policy applies:
“Lenze AC Tech Corporation inverter products are sold with no warranty of fitness for a
particular purpose or warranty of suitability for use with explosion proof motors. Lenze AC Tech
Corporation accepts no responsibility for any direct, incidental or consequential loss, cost, or
damage that may arise through the use of its AC inverter products in these applications. The
purchaser expressly agrees to assume all risk of any loss, cost, or damage that may arise
from such application."
7.0 INPUT AC POWER REQUIREMENTS
DANGER!
Hazard of electrical shock! Capacitors retain charge after power is removed.
Disconnect incoming power and wait until the voltage between terminals B+
and B- is 0 VDC before servicing the drive.
The input voltage must match the nameplate voltage rating of the drive. Voltage fluctuation
must not vary by greater than 10% overvoltage or 15% undervoltage.
NOTE
Drives with dual input voltage ratings must be programmed for the proper
supply voltage (refer to Parameter 01 - LINE VOLTAGE SELECTION in
Section 15.0 - DESCRIPTION OF PARAMETERS).
The drive is suitable for use on a circuit capable of delivering not more than 5,000 RMS
symmetrical amperes at 5 HP (3.7 kW) and below, and 18,000 RMS symmetrical amperes at
7.5 HP (5.5 kW) and above, at the drive’s rated voltage.
If the kVA rating of the AC supply transformer is greater than 10 times the input kVA rating
of the drive(s), an isolation transformer or 2-3% input line reactor must be added to the line
side of the drive(s).
Three phase voltage imbalance must be less than 2.0% phase to phase. Excessive phase to
phase imbalance can cause severe damage to the drive’s power components.
Motor voltage should match line voltage in normal applications. The drive’s maximum output
voltage will equal the input voltage. Use extreme caution when using a motor with a voltage
rating which is different from the input line voltage.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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