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Effective Date: 2/04
IL17574C
Page 3-9
IQ 300
Effective Date: 2/04
Page 3-9
For more information visit:
www.cutler-hammer.eaton.com
H1A H1B H1C
LINE
L3
L2
L1
PS1 PS2
VA VB VC NEU
H2A H2B H2C
IQ 300
LOAD
3 Phase 3 Wire (Up to 600Volts)
using only 2CTs,
Line 2 will be in error by the amount of ground current.
FUSE
Control Power
IQ 320/IQ 330
90-600VAC
48-250VDC
IQ 310
110-240VAC
125-250VDC
Case Ground
Must be
connected for
proper operation
Proper CT polarity is critical to the proper operation of the meter
Figure 3.7 3 Phase 3 Wire, 2 CT Configuration (Up to 600 Volts)
H1A H1B H1C
LINE
L3
L2
L1
PS1 PS2
VA VB VC NEU
H2A H2B H2C
IQ 300
LOAD
3 Phase 3 Wire (Above 600Volts)
using only 2CTs,
Line 2 will be in error by the amount of ground current.
Open Delta
PT
Connection
FUSE
FUSE
Control Power
IQ 320/IQ 330
90-600VAC
48-250VDC
IQ 310
110-240VAC
125-250VDC
Case Ground
Must be
connected for
proper operation
Proper CT polarity is critical to the proper operation of the meter
Figure: 3.8 3 Phase 3 Wire, 2CT Configuration (Above 600 Volts)