Table of Contents
SYSTEM
Windings
NOTE:
NOTE
4–74
The K2 CT bank is connected to Winding1, which is the High-Voltage winding of the GSU
connected to the system. In contrast, the K1 CT bank is connected at the neutral side of
the generator, and it should be configured as Winding-2 (K1).
Path:
Setpoints > System > Transformer > Winding 1 (K2)
..\Transformer\Winding 1
Item Name
Rated MVA
Nominal Ph Ph Voltage
Connection
Grounding
W 1
Path:
Setpoints > System > Transformer > Winding 2 (K1)
..\Transformer\Winding 2
Item Name
Rated MVA
Nominal Ph Ph Voltage
Connection
Angle With Respect To W1
Grounding
W 2
All transformer windings from 889 are associated with CT bank inputs. When overall
differential protection (87O) is selected in the order code option (12 A - Advanced
protection with K2 as CT bank instead of VT bank), the relay CT banks are mapped to
represent the winding currents as follows:
1.
The K2 CT bank is linked to Winding1 (which is the high-voltage side of the GSU
connected to the system), hence the programmed primary rating of the K2 CT bank is
used as a base for magnitude compensation. It is strongly recommended that the
user wires the correct currents from the transformer winding CT to the K2 relay CT
inputs, and correctly programs the K2 CT bank primary and secondary ratings.
Value
5.000
13.800
Wye
Not Within Zone
Value
5.000
13.800
Wye
0 °
Not Within Zone
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Unit
MVA
kV
Unit
MVA
kV
- Quick Links:
- 889 Order Codes
- Protection
- Typical Wiring Diagrams
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