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L100 Inverter
Inverter Mounting
and Installation
2–15
CAUTION: Fasten the screws with the specified fastening torque (see the following
table). Check for any loosening of screws. Otherwise, there is the danger of fire.
CAUTION: Remarks for using earth leakage circuit breakers in the mains supply:
Frequency inverters with CE-filters (RFI-filter) and shielded (screened) motor cables
have a higher leakage current toward Earth GND. Especially at the moment of switching
on this can cause inadvertent tripping of earth leakage circuit breakers. Because of the
rectifier on the input side of the inverter there is the possibility to stall the switch-off
function through small amounts of DC current. Please observe the following:
• Use only short time-invariant and pulse current-sensitive earth leakage circuit
breakers with higher trigger current.
• Other components should be secured with separate earth leakage circuit breakers.
• Earth leakage circuit breakers in the power input wiring of an inverter are not an
absolute protection against electric shock by direct touching.
CAUTION: Be sure to install a fuse in the wire for each phase of the main power supply
to the inverter. Otherwise, there is the danger of fire.
CAUTION: For motor leads, earth leakage breakers and electromagnetic contactors, be
sure to size these components properly (each must have the capacity for rated current
and voltage). Otherwise, there is the danger of fire.
Terminal Dimensions and Tightening Torque
The terminal screw dimensions for all L100 inverters are listed in table below. This
information is useful in sizing spade lug or ring lug connectors for wire terminations.
When connecting wiring, use the tightening torque listed in the following table to safely
attach wiring to the connectors.
Connector
Number of
Screw
Terminals
Models 002NF, 004NF, 005NF
Models 007NF–022NF,
037LF, 004HF–075HF
Screw
Diameter
Width (mm)
Screw
Diameter
Width(mm)
Power Terminals 12 M3.5 7.1 M4 9
Control Signal 15 M2 – M2 –
Alarm Signal 3 M3 – M3 –
Ground Terminals 2 M4 – M4 –
Screw Tightening Torque Screw Tightening Torque
M2 0.2 N•m (max. 0.25 N•m) M3.5 0.8 N•m (max. 0.9 N•m)
M3 0.5 N•m (max. 0.6 N•m) M4 1.2 N•m (max. 1.3 N•m)
Technologies Inc.
Toll Free: voice: 1-877-539-2542 fax: 1-800-539-2542 www.mgitech.com