Instruction Manual

2-6 SP120 AC Drive Installation and Operation
English
2.4.5 Motor Protection
SP120 drives feature electronic overload protection to monitor the motor current. In
the case of multi-motor operation, thermal contacts or positive temperature coefficient
(PTC) resistors must be used for each motor. In the case of motor lead lengths greater
than 50 meters (165 feet), motor reactors should be used.
2.4.6 Grounding the Drive
Ground the drive by connecting a ground wire from the drive’s input grounding
terminal (labeled PE ) uninterrupted to earth ground. Be sure to separate the
drive’s grounding pole from those of other electrical machinery. If multiple drives are
used, make certain each drive is grounded separately (see figure 2.5).
Table 2.3 – AC Line Reactors and DC Chokes
Drive HP
AC Line Reactors DC Chokes
MTE Part No. mH MTE Part No. mH
S12-x01P4xx 0.25 RL-00201 12 2RB003 20
S12-x01P5xx 0.50 RL-00202 20 2RB003 20
S12-x02P5xx 1.0 RL-00201 12 4RB002 12
S12-x02P6xx 0.50 RL-00204 6 4RB002 12
S12-x03P0xx 0.75 RL-00401 3 4RB002 12
S12-x03P8xx 2.0 RL-00402 6.5 4RB003 15
S12-x04P0xx 1.0 RL-00401 3 9RB003 7.5
S12-x05P0xx 1.5 RL-00801 1.5 9RB003 7.5
S12-x05P5xx 3.0 RL-00402 6.5 9RB004 11.5
S12-x07P1xx 2.0 RL-00801 1.5 12RB003 4
S12-x08P6xx 5.0 RL-00802 3.0 12RB004 15
S12-x0010xx 3.0 RL-01201 1.25 18RB003 2.75
S12-x0015xx 5.0 RL-01801 0.8 25RB04 1.75
!
ATTENTION:The SP120 drive has a high leakage current and must be
permanently hard wired to ground. Failure to observe this precaution
could result in severe bodily injury or loss of life.
Figure 2.5 – Grounding the Drive
Protective
Earth
Ground
SP120 Drive
SP120 Drive
SP120 DriveSP120 DriveSP120 DriveSP120 Drive
Protective
Earth
Ground