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PRODUCT INFORMATION PACKET
Model No: 256THFNA19050AA
Catalog No: 811557.00
20HP..1775RPM.256.TEFC./V.3PH.60HZ.CONT.NOT.40C.1.15SF.RIGID.IEEE 841.256THFNA19050AA
IEEE 841
Regal and Leeson are trademarks of Regal Beloit Corporation or one of its affiliated companies.
©2018 Regal Beloit Corporation, All Rights Reserved. MC017097E
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Product Information Packet: Model No: 256THFNA19050AA, Catalog No:811557.00
20HP..1775RPM.256.TEFC./V.3PH.60HZ.CONT.NOT.40C.1.15SF.RIGID.IEEE 841.256THFNA19050AA
Nameplate Specifications
Output HP
Frequency 60 Hz Voltage 460 V
Current
Service Factor
Efficiency 93 % Duty Continuous
Insulation Class
KVA Code G Frame 256T
Enclosure Totally Enclosed Fan Cooled Overload Protector No
Ambient Temperature
Opp Drive End Bearing Size 210 UL Recognized
CSA
IP Code
20 Hp
24.1 A
1.15
F
40 °C
N
56
Output KW
Speed
Phase
Design Code
Drive End Bearing Size
CE
14.9 kW
1775 rpm
3
B
309
Y
Technical Specifications
Electrical Type
Poles 4 Rotation Reversible
Squirrel Cage Inverter Rated
Starting Method
Line Or Inverter
Mounting
Drive End Bearing BALL Opp Drive End Bearing BALL
Frame Material Cast Iron Shaft Type T
Overall Length
Shaft Diameter 1.625 in Shaft Extension 4 in
Assembly/Box Mounting
Outline Drawing
Rigid base
25.27 in
F1/F2 CAPABLE
B-SS203002LE-1225
Motor Orientation
Frame Length
Connection Diagram
HORIZONTAL
12.25 in
A-EE7300-LE
This is an uncontrolled document once printed or downloaded and is subject to change without notice. Date Created: 10/15/2018
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10/2/2008 12:41:47 AM
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9/4/2007 11:27:01 PM -
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Date:
Speed (RPM)
Data Sheet
Current (Amps)
P
E
20.0
40.0
0.0
0 200 400 600 800 10 00 1200 1400 1600 1800 2000
60.0
TORQU
100.0
120.0
140.0
80.0
160.0
30.0
40.0
50.0
0% 20% 40% 60 % 80% 100% 120% 140%
F
60.0
70.0
EFF
80.0
100.0
90.0
Torque (ft-lb)
Efficiency (%) P.F. (%) Current (Amps)
138 115 86.0 24.1 8.5 20.0
105 100 146 59.2 0.00 1800
0 900 1625 1775 1800
P.F. (%)
1800 1795 1785 1780 1775 1,770 1760 0
0.00 14.5 29.5 44.5 59.2 68.0 74.5 105
8.5 51.0 72.0 81.0 84.0 84.5 85.0 40.0
LR Pull-Up BD Rated Idle
8.5 10.5 14.0 18.5 24.1 27.0 30.0 138
1/22/2018 811557.00
Load 0% 25% 50% 75% 100% 115% 125% LR
Current (Amps)
Torque (ft-lb)
RPM
Efficiency (%)
Motor Speed Data
LOAD
Torque Amps
90.0 93.0 93.6 93.0 92.4 91.7
Uncontrolled Copy
Speed -Torque Curve
Motor Load Data
RPM
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
A
M
P
S
0
0
Additional Specifications:
0.2670 0.2070 0.9900 1.4910 28.4000
R1 R2 X1 X2 Xm
EQUIV CKT (OHMS / PHASE)
VFD Rating
Outline Dwg B-SS203002LE-1225
Conn. Diag A-EE7300-LE
Rotor/Shaft wk²
Duty
Ambient
Elevation
Ref Wdg
Sound Pressure @ 1M
K2564164 NONE
Design
LR Code letter
Service Factor
Temp Rise @ FL
Construction
Voltage
Frequency
HP
Sync. RPM
Frame
Enclosure
Information Block
CONSTANT 20:1
65 dBA
CONT
1,000
3.2
1.15
65
40
60
G
B
TEFC
TFN
460
256
Data @
feet
Lb-Ft²
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
A
M
P
S
°
°
C
C
Hz
V
460
v
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