Transformer - GE T35 Instruction Manual

CHAPTER 5: SETTINGS

5.5.4 Transformer

5.5.4.1 Menu
SETTINGS  SYSTEM SETUP  TRANSFORMER
 TRANSFORMER

The T35 provides primary protection for medium to high voltage power transformers. It performs this function on a variety
of power transformer configurations with up to six sets of three phase inputs available.
5.5.4.2 General transformer settings
SETTINGS  SYSTEM SETUP  TRANSFORMER  GENERAL
 GENERAL

The general transformer settings apply to all windings. Settings specific to each winding are shown in the following
section.
— Selects the number of windings for transformer setup.
NUMBER OF WINDINGS
— Reference winding is the winding to which all currents are referred. That is, the currents from all
REFERENCE WINDING
other windings are normalized (magnitude compensation) to this winding, and the per unit value of the differential
currents, the restraint currents, and the corresponding differential characteristics (pickup, break points, and so on) are all
based on the CT Nominal of this winding. The reference winding can be selected either automatically or manually. When
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
 GENERAL


 WINDING 1



 WINDING 6


 THERMAL INPUTS


NUMBER OF WINDINGS:

2
REFERENCE WINDING:

Automatic Selection
PHASE COMPENSATION:

Internal (software)
LOAD LOSS AT RATED

LOAD: 100 kW
RATED WINDING TEMP

RISE: 65°C (oil)
NO LOAD LOSS:

10 kW
TYPE OF COOLING:

OA
TOP-OIL RISE OVER

AMBIENT: 35°C
THERMAL CAPACITY:

100.00 kWh/°C
WINDING THERMAL TIME

CONSTANT: 2.00 min
See below
See page 5-149
See page 5-158
Range: 2 to 6 in steps of 1
Range: Automatic Selection, Winding 1, Winding 2,...,
Winding 6
Range: Internal (software), External (with CTs)
Range: 1 to 20000 kW in steps of 1
Range: 55°C (oil), 65°C (oil), 80°C (dry), 115°C (dry),
150°C (dry)
Range: 1 to 20000 kW in steps of 1
Range: OA, FA, Non-directed FOA/FOW, Directed FOA/FOW
Range: 1 to 200°C in steps of 1
Range: 0.00 to 200.00 kWh/°C in steps of 0.01
Range: 0.25 to 15.00 min. in steps of 0.01
SYSTEM SETUP
5
5-147