5.7
KEW6305
5.4.3 Criteria of judgment
Check item
Criteria of Judgment
System to be checked
Error
message
3P4W 3P3W3A 3P3W
1P3W 1P2W-3 1P2W-2 1P2W-1
Frequency
Should be 45Hz or more.
f
Err.Lo_Hz
Should be 65Hz or less.
Err.Hi_Hz
Voltage input
Should be 60% or more of
(V range x VT ratio).
V1/V2/V3 V1/V2
V1
Err.Lo_V
Should be 110% or less of
(V range x VT ratio).
Err.Hi_V
Voltage
balance
Should be within ±10º of reference
phase.
DEG(V2) :120°
DEG(V3) :240°
DEG
(V2)
:300°
DEG
(V2)
:180°
----
Err.PH_V
Voltage
phase
Should within ±20% against V1.
V2/V3 V2
----
Err.bL_V
Current input Should be 10% or more of
(A range x CT ratio).
* One range low if auto-ranging has
been selected.
A1/A2/A3 A1/A2
A1
/A2
/A3
A1
/A2
A1
Err.Lo_A
Should be 110% or less of
(A range x CT ratio).
* One range high if auto-ranging has
been selected.
Err.Hi_A
Current
phase
PFi (absolute value) should be 0.5 or
more.
* for 3P3W3A, 0 < PFi
PF1/PF2/PF3
PF1/PF2
PF1
/PF2
/PF3
PF1
/PF2
PF1
Err.PH_A
Pi should be positive value.
P1/P2/P3 P1/P2
P1
/P2
/P3
P1
/P2
P1
Err.PH_A
*KEW6305 may show any incorrect connection is found if great power factors (0.5 or less)
exist at the measurement site.
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