-30-
4-3
Wiring
4-3-1 Notes for wiring:
◆
The input power of the inverter must be disconnected and there must be no applied voltage on the input
port while wiring!
◆
Make sure no chip of wires enters inside the inverter while wiring.
◆
Circuit breakers must be installed between the power source and input power terminals (R, S, T). To ensure
system safety, please install a magnetic contactor between the circuit breaker and input power.
◆
Please properly connect wires from the motor to output terminals (U, V, W).
4-3-2 Impact of wiring distance and solutions:
◆
If the wiring distance between the inverter and the motor is too long, the leakage current of higher
harmonics will accordingly increase, which may lead to adverse impact on peripheric equipment. The total
wiring distance between the inverter and the motor should not exceed the numbers shown in Table 4-1.
Table 4-1 Wiring distance between the inverter and the motor
Wire length
50m
100m
200m
Carrier frequency
Below 14k
Below 10k
Below 5k
◆
The wiring length should not exceed 100m during vector control. (When it exceeds 30m, Please apply
automatic measurement mode 2.) In case of vector control, the wiring length should not exceed 100m. (When
it exceeds 30m, please apply automatic measurement 2.)
◆
Switching ON/OFF of inverter components generates surge voltage on the motor. Especially in the case of
400v motor, if wiring length is too big, insulativity of the motor may be weakened. Thus, please adopt motors
with enhanced insulativity and shorten as much as possible the wiring length (generally between 10~20m.)
between the inverter and the motor.
4-3-3 Notes for grounding:
◆
Please ground the ground terminals correctly: ground 400v series according to
C-
Category criteria and the ground resistance should be less than 10Ω.
◆
Please shorten the length of ground wire as much as possible and please do not use the
enclosure or the frame for grounding.
Summary of Contents for LeaderSamco NS
Page 7: ......
Page 8: ...7 1 Safety 1 1 Important notes 1 2 Instructions for use...
Page 9: ...8 1 3 Instructions for installation 1 4 Instructions for transportation and relocation...
Page 10: ...9 1 5 Instructions for wiring...
Page 11: ...10 1 6 Instructions for operation 1 7 Instructions for maintenance and examination...
Page 12: ...11 1 8 Instructions for disposal 1 9 other notes...
Page 22: ...21 4 Connection layout 4 1 Terminal power connection diagram...
Page 24: ...23 4 2 2 Main circuit terminal layout 1 NS 4A003 B NS 4A004 B NS 4A006 B NS 2A003 A NS 2A004 A...
Page 25: ...24 2 NS 4A009 B NS 4A013 B NS 4A017 B...
Page 26: ...25 3 NS 4A024 B NS 4A032 B NS 4A038 B NS 4A046 B...
Page 36: ...35 4 6 Connection to peripheric equipment 4 6 1 Peripheric equipment connection diagram...