Main circuit (with cat. no. 825-mst option card), Figure 9.5, Basic unit for short-circuit protection – Rockwell Automation 825 Smart Motor Manager User Manual User Manual
Page 145
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Applications/Wiring 9-4
Publication 825-UM001B-EN-P January 2001
Short-Circuit Protection of Medium/High-Voltage Motors
Main Circuit (with Cat. No. 825-MST Option Card)
3-Phase Current Evaluation
Figure 9.5 Basic Unit for Short-Circuit Protection
1
3
5
2
4
6
U1
825-MCM
825-M
F1
U2
M
3 ~
K1
A1
A2
QA
L1
L2
L3
QM
Variants
•
2-phase current evaluation
•
2-phase current evaluation and earth (ground) fault
protection with core balance transformer
U1 Converter module
Cat. No. 825-MCM2
Cat. No. 825-MCM20
U2 Main current transformer
…A/5 A or …A/1 A
For choice refer to
Chapter 2
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