Rockwell Automation 1503VC IntelliVAC Plus Contactor Control Module - Manual (Page 76)

Chapter
5
1503-UM054C-EN-P – June 2013
IntelliVAC Plus Basic Wiring
Fuse Protection
The IntelliVAC module requires external fuse protection to
coordinate with the power supply and contactor. The fuse ratings
shown in Table 5.A allow the passage of inrush currents expected
when the contactor is closed, or from recommended external
capacitors for the TDUV option. They will also protect the contactor
coils in the event of a module malfunction.
The recommended fuses have been tested to ensure reliable
protection of the module. If the supply voltage is DC, the module
must be used with an external fuse that is approved for and rated to
interrupt the DC voltage supply. The types listed are Ferraz-Shawmut
Midget Fuses (1-1/2" X 13/32"). The TRM is a time-delay type,
rated 250 VAC. The ATM is a fast-acting type, rated 500 VDC.
Table 5.A – IntelliVAC Plus Fuse Protection
Rated Supply Voltage Contactor Type
Recommended Fuse
(minimum) (maximum)
110/120 VAC
400A EH TRM 2 TRM 3.2
800A EH TRM 2 TRM 6.25
400/800A ML TRM 2 TRM 3.2
220/240 VAC
400A EH TRM 2 TRM 6.25
800A EH TRM 2 TRM 6.25
400/800A ML TRM 2 TRM 6.25
125 VDC
400A EH/ML ATM 3 ATM 3
800A EH/ML ATM 5 ATM 6
250 VDC
400A EH/ML ATM 3 ATM 5
800A EH/ML ATM 5 ATM 6
EH = Electrically Held vacuum contactor
ML = Mechanical Latch vacuum contactor
Note:
If external capacitors are connected, or more than one
IntelliVAC module is protected by a common control fuse,
the maximum recommended fuse should be used to
prevent fuse opening due to increased inrush current when
control power is applied.
IntelliVAC Base
Wiring