Rockwell Automation Publication 825-UM004D-EN-P - November 2012 15
Introduction Chapter 1
Accessories
Phase current inputs require one of the following external 825-MCM
converter modules:
The ground fault current (zero sequence) feature requires an external 825-CBCT
Core Balance Current Transformer, or equivalent.
The following devices are required to add RTD protection:
• An external RTD scanner Cat. No. 825-PR12D RTD. A fiber-optic cable
is not included with the 825-PR12D).
• A si
mplex 62.5/125 μm fiber-optic cable with ST connector for
co
nnecting the external RTD scanner to the 825-P (e.g., part# 1570FCBL-
MM-SX-62-STST-2M from Ultra Spec Cable - http://store.ultraspec.us).
Applications
The 825-P can be used with the following across the line starter applications:
• Low and medium voltage with 2 or 3 potential transformers
• With or without phase current transformers
• With or without zero-sequence core balance current transformer
• With or without external RTD module
• Reversing starter
• Star-delta starting
• Two -spe ed motors
F
i
gure 1 shows “across the line starting” AC connections for the case where
exte
rnal current transformers are not required. Refer to Chapter2: Installation
for additional applications and the related connection diagrams.
Table 1 - Converter Module List
Description Cat. No.
0.5…2.5 A Converter Module 825-MCM2
1.0…5.0 A Converter Module 825-MCM5
2.5…20 A Converter Module 825-MCM20
20…180 A Converter Module 825-MCM180
160…630 A Converter Module 825-MCM630
160…630 A Converter Module 825-MCM630N
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