Motor Protection - Reliance electric SP120 Manual De Instrucciones Y Operación

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2.4.5 Motor Protection

2.4.6 Grounding the Drive
2-6
Drive HP
S12-x01P4xx 0.25
S12-x01P5xx 0.50
S12-x02P5xx 1.0
S12-x02P6xx 0.50
S12-x03P0xx 0.75
S12-x03P8xx 2.0
S12-x04P0xx 1.0
S12-x05P0xx 1.5
S12-x05P5xx 3.0
S12-x07P1xx 2.0
S12-x08P6xx 5.0
S12-x0010xx 3.0
S12-x0015xx 5.0
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.
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.
Ground the drive by connecting a ground wire from the drive's input grounding
terminal (labeled PE
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).
SP120 Drive SP120 Drive
Protective
Earth
Ground
Table 2.3 – AC Line Reactors and DC Chokes
AC Line Reactors
MTE Part No.
RL-00201
RL-00202
RL-00201
RL-00204
RL-00401
RL-00402
RL-00401
RL-00801
RL-00402
RL-00801
RL-00802
RL-01201
RL-01801
) uninterrupted to earth ground. Be sure to separate the
SP120 Drive SP120 Drive
Figure 2.5 – Grounding the Drive
DC Chokes
mH MTE Part No.
12 2RB003
20 2RB003
12 4RB002
6 4RB002
3 4RB002
6.5 4RB003
3 9RB003
1.5 9RB003
6.5 9RB004
1.5 12RB003
3.0 12RB004
1.25 18RB003
0.8 25RB04
SP120 Drive SP120 Drive
Protective
Earth
Ground
SP120 AC Drive Installation and Operation
mH
20
20
12
12
12
15
7.5
7.5
11.5
4
15
2.75
1.75