Datakom DPR-400 User Manual

DPR-400 User Manual Rev_01 Firmware V-1.0
- 17 -
CORRECT CT CONNECTIONS
Suppose that each phase of the utility mains are loaded with 100 kW. The power factor (PF) for the load
is as follows:
kW
kVAr
kVA
pf
Phase L1
100.0
0.0
100
1.00
Phase L2
100.0
0.0
100
1.00
Phase L3
100.0
0.0
100
1.00
Total
300.0
0.0
300
1.00
EFFECT OF POLARITY REVERSAL
The utility mains is still loaded with 100 kW on each phase. The load power factor (PF) on Phase L2 will
show -1.00 due to reverse CT polarity.
As a result, total load power displayed will be 100 kW.
Measured values are as follows:
kW
kVAr
kVA
pf
Phase L1
100.0
0.0
100
1.00
Phase L2
-100.0
0.0
100
-1.00
Phase L3
100.0
0.0
100
1.00
Total
100.0
0.0
300
0.33

Datakom DPR-400 Specifications

General

Brand	Datakom
Model	DPR-400
Category	Relays
Language	English