KVA BASE RATING : 275

FRAME : HC4D

CONTROL SYSTEM

SEPARATELY EXCITED (PMG)

SELF EXCITED ( NO PMG)

AVR

MX341

MX321

SX440

SX421

VOLTAGE REGULATION

1.00%

0.50%

1.00%

0.50%

WITH 4% ENGINE GOVERNING SX440 IS STANDARD AVR

INSULATION SYSTEM

CLASS H

PROTECTION

IP23 STANDARD

RATED POWER FACTOR

0.8 LAG

STATOR WINDING

DOUBLE LAYER LAP

WINDING PITCH

TWO THIRD

WINDING LEADS

12

OVERLOAD

10% OVERLOAD FOR 1 HOUR ONCE EVERY 12 HOURS

WAVE FORM DISTORTION

NO LOAD <1.8%, NON DISTORTING BALANCED LINEAR LOAD < 5%

MAXIMUM OVERSPEED

2250 REV / MIN

BEARING DRIVE END

BALL 6317 –2RS ( ISO )

BEARING NON-DRIVE END

BALL 6314 –2RS ( ISO )

VOLTAGE SERIES STAR (Y)

415 / 240

FREQUENCY HZ

50

1BRG

2BRG

WEIGHT COMP. GENERATOR

950

950

WEIGHT WOUND STATOR

415

415

WEIGHT WOUND ROTOR

371

338

WR2 INERTIA KGM2

4.18

3.88

% EFFICIENCY @ 0.8 PF AND 100% LOAD

93.8

COOLING AIR

0.486 M3 / SEC

STATOR WINDING RESISTANCE (L-L) @ 22 DEG C

0.028 OHMS

ROTOR WINDING RESISTANCE AT 22 DEG C

1.04 OHMS

X_d DIR AXIS SYNCHRONOUS

2.43

X’_d DIR AXIS TRANSIENT

0.16

X"_d DIR AXIS SUBTRANSIENT

0.11

X_q QUAD AXIS REACTANCE

2.04

X"_q QUAD AXIS SUBTRANSIENT

0.3

X_L LINKAGE REACTANCE

0.06

X₂ NEGATIVE SEQUENCE

0.21

X₀ ZERO SEQUENCE

0.07

REACTANCES ARE SATURATED

VALUES ARE PER UNIT AT RATINGS AND VOLTAGE INDICATED

T’_d TRANSIENT TIME CONSTANT

0.08

T"_d SUBTRANSIENT TIME CONSTANT

0.019

T’ do O.C. FIELD TIME CONSTANT

1.7

Ta ARMATURE TIME CONSTANT

0.018

SHORT CIRCUIT RATIO

0.412