Product Specification

BrandMarathon Electric
Part Number256TTFNA16574
General Details
CategorySevere Duty
Product LineBlue Chip
HP20
KW14.92
RPM1800
Voltage230/460
EnclosureTEFC
Frame256T
Motor StandardsNEMA
Technical Details
Phase3
HP20
Ingress ProtectionIP55
Insulation ClassF
KW14.92
Motor StandardsNEMA
Motor TypeAC Motor
MountRigid
NameplateN/A
Nema DesignB
Number of LeadsN/A
PaintBLUE (EPOXY)
Hertz60
Pole4
RotorN/A
RPM1800
Service Factor1.15
Shaft Diameter inN/A
Space HeatersOptional
Temperature RiseN/A
Thermostats ThermistorsConsult Manufacturer
Voltage230/460
Weight375
WireN/A
EnclosureTEFC
Bearings DE6309
Bearings NDE6210
Conduit BoxN/A
C Dimension25.27
Direction of RotationN/A
Down Thrust lbsN/A
Drains BreathersN/A
Drip CoverN/A
DutyS1
EfficiencyN/A
Elevation3300
Ambient Teperature40
EncodersN/A
FanN/A
FlangeN/A
Frame256T
Frame MaterialCAST IRON
Full Load Amps48.0/24.1
Full Load Efficiency93.0
GreasePOLYREX EM
Grounding RingN/A
Grounding TerminalN/A
Area Classification
Area ClassificationN/A
Temp CodeN/A
Perfomance
MAX RPMN/A
Start TypeLINE OR INVERTER
Starts Hour2
Safe Stall Time hotN/A
Safe Stall Time Cold25 SEC.
Rotor Inertia lb ft3.2 LB-FT^2
Pull Up TorqueN/A
Power Factor 7581
Power Factor 5072
Power Factor 10084&83.5
No Load Current17 / 8.5
Noise Level dB A65 dBA
Nema Load lb ftN/A
Breakdown Torque146 LB-FT 247%
Max Allowable Inertia lb ft125 LB-FT^2
Locked Rotor Torque105 LB-FT 177%
Locked Rotor Current276 / 138
KVA CodeG
Guaranteed Eff92.4
Full Load Torque59.2 LB-FT
Full Load Speed1775
Full Load CurrentN/A
Efficiency 7593.6
Efficiency 5093
Efficiency 10093&92.5
Speed Range
CT10:1
VT10:1
Misc
Brake RatingN/A
NoteN/A
OEMN/A