6 Conditions for Compliance with UL/cUL Standards
E-52
Installing Branch Circuit Protection and Short-Circuit
Current Rating
To provide protection for short-circuit accidents in internal circuits, always
connect molded-case circuit breakers or Fuses on the input side of the SERVO-
PACK as branch circuit protective devices.
Use UL-listed molded-case circuit breakers and UL-recognized fuses.
The short-circuit current rating (SCCR) of the SERVOPACK will depend on the
type of branch circuit protective device that you connect.
-7W SERVOPACKs are suitable for the Motor Group Installation defined in
UL 61800-5-1 as long as the following conditions are met.
• The
-7W SERVOPACK must be used in a circuit that provides the short-cir-
cuit current rating (SCCR) given in the following table.
• The
-7W SERVOPACK must be protected by one of the branch circuit pro-
tection devices given in the following table.
The maximum applicable voltage for compliance with UL/cUL standards is
given below regardless of the short-circuit current rating.
200 V Class: 240 Vrms
Short-Circuit Current Rating (SCCR): 5,000 Arms (Sine Wave)
Use Class CC, Class J, or Class T fuses for time delay fuses and non-time delay
fuses.
•
-7S SERVOPACKs
SERVOPACK
Model: SGD7S-
Rated Output
Current [Arms]
Maximum Cur-
rent
Rating of
Molded-Case
Circuit Breaker
[A]
Maximum Cur-
rent
Rating of Time
Delay Fuse
[A]
Maximum
Current
Rating of
Non-Time
Delay Fuse
[A]
R70A
0.66
15
1
1
R90A
0.91
15
1
*1
3
1R6A
1.6
15
*2
6
2R8A
2.8
15
3
*1
6
3R8A
3.8
15
6
10
5R5A
5.5
15
6
*1
15
7R6A
7.6
15
10
20
120A
(3-phase 200-
VAC input)
11.6
20
20
30
Continued on next page.
