Rockwell Automation 1503VC IntelliVAC Contactor Control Module - Manual (Page 18)

3-6 Installation and Wiring
1503-UM051D-EN-P – June 2013
Fuse Protection The IntelliVAC module requires external fuse protection to
coordinate with the power supply and contactor. The fuse ratings
shown in Table 3.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 3.A – IntelliVAC Fuse Protection
Recommended Fuse
Rated Supply Voltage Contactor Type
(minimum) (maximum)
400A EH TRM 2 TRM 3.2
800A EH TRM 2 TRM 6.25 110/120 VAC
400/800A ML TRM 2 TRM 3.2
400A EH TRM 2 TRM 6.25
800A EH TRM 2 TRM 6.25 220/240 VAC
400/800A ML TRM 2 TRM 6.25
400A EH/ML ATM 3 ATM 3
125 VDC
800A EH/ML ATM 5 ATM 6
400A EH/ML ATM 3 ATM 5
250 VDC
800A EH/ML ATM 5 ATM 6
EH = Electrically Held vacuum contactor
ML = Mechanically Latched vacuum contactor
Grounding The IntelliVAC module must be connected to a common ground
terminal (PE) on the controller panel. The ground terminal is located
on top of the module enclosure for Series A design (refer to Figure
3.7), and on the bottom of module enclosure for Series B design,
(refer to Figure 3.6)
A T T E N T I O N A T T E N T I O N
It is important that IntelliVAC is properly
grounded using the ground connection
provided. Failure to do so may result in
damage to equipment or personal injury.