Marathon Electric E505 Product Information Packet

PRODUCT INFORMATION PACKET

Model No: 256TTGN16509

Catalog No: E505

20 HP Explosion Proof Motor, 3 phase, 3600 RPM, 230/460 V, 256T Frame, EPFC

Explosion Proof NEMA Motors

Regal and Marathon are trademarks of Regal Beloit Corporation or one of its affiliated companies.

©2020 Regal Beloit Corporation, All Rights Reserved. MC017097E

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Product Information Packet: Model No: 256TTGN16509, Catalog No:E505 20 HP Explosion Proof Motor, 3 phase, 3600 RPM, 230/460 V, 256T Frame,
EPFC

Nameplate Specifications

Output HP 20 Hp Output KW 14.9 kW
Frequency 60 Hz Voltage 230/460 V
Current 47.0/23.4 A Speed 3537 rpm
Service Factor 1.15 Phase 3
Efficiency 92.4 % Power Factor 86
Duty Continuous Insulation Class F
Design Code B KVA Code G
Frame 256T Enclosure Explosion Proof Fan cooled
Thermal Protection Thermostats (N/C) Ambient Temperature 40 °C
Drive End Bearing Size 6309 Opp Drive End Bearing Size 6210
UL UL Listed And CSA Certified CSA Y
CE N IP Code 54

Hazardous Location

EXP PROOF CL I GR C&D CL II GR
F&G T3B

Technical Specifications

Electrical Type Squirrel Cage Inverter Rated Starting Method Line Or Inverter
Poles 2 Rotation Reversible
Resistance Main .394 Ohms Mounting Rigid base
Motor Orientation Horizontal Drive End Bearing Ball
Opp Drive End Bearing Ball Frame Material Cast Iron
Shaft Type T Overall Length 25.27 in
Frame Length 12.25 in Shaft Diameter 1.625 in
Shaft Extension 4.18 in Assembly/Box Mounting F1 ONLY
Outline Drawing B-SS203001-1225 Connection Drawing A-EE7308AD

This is an uncontrolled document once printed or downloaded and is subject to change without notice. Date Created:10/06/2020

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Regal Beloit America, Inc.

TM

COPYRIGHT REGAL BELOIT AMERICA, INC. ALL RIGHTS RESERVED.

PROPRIETARY AND CONFIDENTIAL INFORMATION - THIS DOCUMENT IS THE PROPERTY OF

REGAL BELOIT AMERICA, INC. ("OWNER") AND CONTAINS OWNER'S PROPRIETARY

INFORMATION. ANY PERSON, CORPORATION OR OTHER FIRM RECEIVING I T IS DEEMED,
BY RECEIVING IT, TO AGREE THAT IT, AND/OR ANY PART OF IT, SHALL NOT BE DISCLOSED
TO ANY PERSON, CORPORATION OR OTHER ENTITY, DUPLICATED, A ND/ OR USED, EXCEPT

AS EXPRESSLY APPROVED IN WRITING IN ADVANCE BY OWNER. THIS DOCUMENT SHALL

BE RETURNED TO OWNER UPON REQUEST. IT MAY BE SUBJECT TO CERTAIN

RESTRICTIONS UNDER APPLICABLE EXPORT CONTROL LAWS AND REGULATIONS.

TOLERANCES UNLESS
OTHERWISE SPECIFIED:
DEC.

INCH mm ANGLE
.X 0.1 [ 2.5] 7' 30"
.XX 0.03 [ 0.76]
XXX 0.005 [ 0.127]
.XXXX 0.0005 [ 0.0127]
REMOVE BURRS & BREAK SHARP
EDGES: .003/.015 [.076/.381]
CORNER FILLETS: .02 [.51]
MACHINED SURFACES:

200 5.1

INCH mm
mm SHOWN IN [BRACKETS]

12

43

A

B

2

43

1

A

B

ECO DESCRIPTION

DATEAPPROVED BY

DATEREVISION BY

ECO

DRAWING REVISION

REFERENCE

MATERIAL

SHEET

DRAWING NUMBERSIZE

DESCRIPTION

THIRD ANGLE
PROJECTION

DRAWN BY

DATE

DATE

APPROVED BY

PROCESS/FINISH

B

1 OF 1

SS203001

RM

12-14-1993

FG

12-15-1993

F SD 11/18/2019

ECO-0177002 VMR 11/18/2019

OULTLINE DESCRIPTION AND C DIMENSION UPDATED

OUTLINE

250T FR. EXP. PR. - BB - T - STD.

NOTES:

1. CONDUIT BOX CAN ONLY BE ROTATED CLOCKWISE UP
TO 270 FROM ITS ORIGINAL POSITION.

2. NAMEPLATES TO BE READ FROM CONDUIT BOX SIDE
OF MOTOR.

DASH FRAME B C 2F 2FF BS

1050 254T

10.25

[260.35]

23.65

[600.71]

---

8.25

[209.55]

4.12

[104.65]

1225 256T

12.00

[304.80]

25.40

[645.16]

---

10.00

[254.00]

5.00

[127.00]

B

2F

1.625

1.624

41.275

41.250

4.20

106.71

C

BS

7.13

180.975

4.25

107.84

4.00

101.60
.375 x .375 x 2.88
[9.525 x 9.525 x 73.15]
KEY

12.16

308.86

10.00

254.00

14.38

365.26

2.11

53.56

.55

13.97

14.06

357.12

20.30

515.63

5.00

127.00

6.25

6.19

158.75

157.23

3.12

79.25

10.15

257.71

13.14

333.86

.53-.58

4 HOLES

1-1/4" NPT

LEAD HOLE

3/8-16UNC-2B
THRU-1 HOLE

F2 VIEW

Regal Beloit America, Inc.

TM

COPYRIGHT REGAL BELOIT AMERICA, INC. ALL RIGHTS RESERVED.

PROPRIETARY AND CONFIDENTIAL INFORMATION - THIS DOCUMENT IS THE PROPERTY OF

REGAL BELOIT AMERICA, INC. ("OWNER") AND CONTAINS OWNER'S PROPRIETARY

INFORMATION. ANY PERSON, CORPORATION OR OTHER FIRM RECEIVING I T IS DEEMED,
BY RECEIVING IT, TO AGREE THAT IT, AND/OR ANY PART OF IT, SHALL NOT BE DISCLOSED
TO ANY PERSON, CORPORATION OR OTHER ENTITY, DUPLICATED, A ND/ OR USED, EXCEPT

AS EXPRESSLY APPROVED IN WRITING IN ADVANCE BY OWNER. THIS DOCUMENT SHALL

BE RETURNED TO OWNER UPON REQUEST. IT MAY BE SUBJECT TO CERTAIN

RESTRICTIONS UNDER APPLICABLE EXPORT CONTROL LAWS AND REGULATIONS.

TOLERANCES UNLESS
OTHERWISE SPECIFIED:
DEC.

INCH mm ANGLE
.X 0.1 [ 2.5] 7' 30"
.XX 0.03 [ 0.76]
XXX 0.005 [ 0.127]
.XXXX 0.0005 [ 0.0127]
REMOVE BURRS & BREAK SHARP
EDGES: .003/.015 [.076/.381]
CORNER FILLETS: .02 [.51]
MACHINED SURFACES:

200 5.1

INCH mm
mm SHOWN IN [BRACKETS]

12

43

A

B

2

43

1

A

B

ECO DESCRIPTION

DATEAPPROVED BY

DATEREVISION BY

ECO

DRAWING REVISION

REFERENCE

MATERIAL

SHEET

DRAWING NUMBERSIZE

DESCRIPTION

THIRD ANGLE
PROJECTION

DRAWN BY

DATE

DATE

APPROVED BY

PROCESS/FINISH

B

1 OF 1

SS203001

RM

12-14-1993

FG

12-15-1993

F SD 11/18/2019

ECO-0177002 VMR 11/18/2019

OULTLINE DESCRIPTION AND C DIMENSION UPDATED

OUTLINE

250T FR. EXP. PR. - BB - T - STD.

NOTES:

1. CONDUIT BOX CAN ONLY BE ROTATED CLOCKWISE UP
TO 270 FROM ITS ORIGINAL POSITION.

2. NAMEPLATES TO BE READ FROM CONDUIT BOX SIDE
OF MOTOR.

DASH FRAME B C 2F 2FF BS

1050 254T

10.25

[260.35]

23.65

[600.71]

---

8.25

[209.55]

4.12

[104.65]

1225 256T

12.00

[304.80]

25.40

[645.16]

---

10.00

[254.00]

5.00

[127.00]

Uncontrolled Copy

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