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3.6.18.
Connection example for three-phase GPC (3PH) control option 4 for three-phase
closed delta load with transformer
L1
L2
L3
FUSE
1/L1
GPC-E2
FUSE
GG
2/T1
SYMMETRIC
and
ASYMMETRIC
transformers
TA3
R
Load
R
Load
FUSE
FUSE
TA1, TA2, TA3
Input (J5)
J5
1/L1
1/L1
GPC-E1
GPC-M
2/T1
2/T1
PE
TA2
TA1 (to J5)
R
Load
81900A "MHW_GPC-40/600A"_03-2021_ENG_page 52
Id
FUSE
1/L1
L1
to TA3
to TA2
to TA1
V
FUSE
1/L1
L2
FUSE
1/L1
L3
P
Id =
ƞ × √3 × V × cos φ
FIRING MODE
HB DIAGNOSTICS
AVAILABLE
Fuse
GG Fuse
GPC-M
2/T1
SYMMETRIC
and
ASYMMETRIC
transformers
GPC-E1
2/T1
GPC-E2
2/T1
Is =
√3 × Vload × cosφ
CAUTION
Connections for control
option 4
(Vload inputs + external CTs)
GPC - DIP switch configuration
DIP 1
DIP 2
DIP 3
ON
ON
ON
V
Phase-to-phase voltage
P
Total power
Vload Voltage on secondary (load)
Current in primary
Id
Is
Current in secondary
Transformer output
ƞ
(typical 0.9) if resistive load cos φ=1
ZC, PA BF (bF.Cy ≥ 2)
Partial and total load break for each individual branch.
For PA mode HB diagnostics active with P>30%
Ultra-rapid fuse only required for controls with
option Fuse = 0
See Fuse sections
Is
R
V
load
R
R
P
DIP 4
DIP 5
OFF
ON
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