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Enclosed Motor Controls
Enclosed Motor
Controls
A-333
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Data subject to change without notice.
Medium Voltage Starters
Standards
ANSI/IEEE C37.2
Function/Protection Feature
Standard Option
19
Reduced Voltage Starting and Bypass
27
Undervoltage protection
37
Undercurrent protection
46
Phase-Balance Current protection
47
Phase Sequence
48
Incomplete Sequence
50
Instantaneous Overcurrent trip
51
Overcurrent trip
55
Power Factor check
59
Overvoltage
81
Frequency check
86
Lockout Relay - electronic
50N/51G
Ground fault detection instantaneous and fault-current
49 & 38
Winding Temperature and Bearing Temperature
Block Diagram
M
3~
Disconnecting Switch
and Fuses
Medium Voltage Power Supply
Medium Voltage Motor
Power Stack
Main Contactor
Bypass
Contactor
CTs