Cutler Hammer, Div of Eaton Corp XTOB, XTOT Technical Data

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XTOB, XTOT Overload Relays

IEC Contactors and Starters

XT IEC Power Control

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Thermal Overload Relays

Product Description

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The XT line of IEC motor
thermal overload relays

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provides an efficient motor
protection solution, available

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up to 630A. XTOB units can
be directly mounted to the

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contactor or mounted
separately.

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Features and Benefits

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Direct connect up to 250A

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Stand alone and CT type
up to 630A

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Large thermal overcurrent
range

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Test button

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Manual/automatic
selectable reset

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NO-NC auxiliary as
standard

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Class 10A (to 250A)

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Class 30 (CT type)

Contents

Description Page

Relays and Timers . . . . . . . . . . . . . . . . . . . . . . . . . V5-T1-3

Miniature Controls . . . . . . . . . . . . . . . . . . . . . . . . . V5-T1-18

Contactors and Starters . . . . . . . . . . . . . . . . . . . . V5-T1-35

Thermal Overload Relays

Catalog Number Selection . . . . . . . . . . . . . . . . V5-T1-129

Product Selection . . . . . . . . . . . . . . . . . . . . . . . V5-T1-130

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . V5-T1-133

Technical Data and Specifications . . . . . . . . . . V5-T1-136

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . V5-T1-138

C440/XT Electronic Overload Relay . . . . . . . . . . . V5-T1-141

Manual Motor Protectors . . . . . . . . . . . . . . . . . . . . V5-T1-157

Combination Motor Controllers . . . . . . . . . . . . . . . V5-T1-193

XT Electronic Manual Motor Protector . . . . . . . . . V5-T1-216

EMS—Electronic Motor Starter . . . . . . . . . . . . . . V5-T1-229

Reference Data . . . . . . . . . . . . . . . . . . . . . . . . . . . V5-T1-231

Standards and Certifications

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IEC EN 60947

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CE approved

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UL

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CSA

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ATE X

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RoHS

Notes

Short-circuit protection: Observe the maximum permissible fuse of the contactor with direct
device mounting. See MN03402001E for more information on overload relays for Frames B–G.

Trip Class: 10A
Suitable for protection of EEx e-motors. EC prototype test certificate available upon request.
See manuals MN03402001E and MN03407001E, Page V5-T1-133.

Instructional Leaflets

Pub51221 XTOB, D Frame overload relays

Pub51222 XTOB, B–C Frame overload relays

(inside of packaging)

(inside of packaging)

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V5-T1-128 Volume 5—Motor Control and Protection CA08100006E—February 2015 www.eaton.com

IEC Contactors and Starters

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Technical Data and Specifications

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XTOB Overload Relay—General

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Description XTOB…BC1, XTOB…CC1 XTOB…DC1 XTOB…GC1, XTOB…GC1S XTOB…HC1, XTOB…LC1

Standards IEC/EN 60947, VDE 0660,

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Climate proofing

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Ambient temperature

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Temperature compensation Continuous Continuous Continuous Continuous

Mechanical shock resistance (IEC/EN 60068-2-27)

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half-sinusoidal shock 10 ms

Degree of protection IP20 IP20 IP20 P00

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Protection against direct contact when actuated
from front (IEC 536)

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Insulation voltage (U

Overvoltage category/pollution degree III/3 III/3 III/3 III/3

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Impulse withstand voltage (Uimp) Vac 6000 6000 6000 8000

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Operational voltage (U

Safe isolation to VDE 0106 Part 101 and part 101/A1

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between auxiliary contacts and main contacts (Vac) 440 440 440 500

between main contacts (Vac) 440 440 440 500

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Overload release setting range 0.1–32A 6–75A 25–150A 50–300A

Short-circuit protection maximum fuse See overload relay tables starting on Page V5-T1-144.

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Temperature compensation residual error >40°C <0.25 <0.25 <0.25 <0.25

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Current heat loss (three conductors)

Lower value of setting range, W 2.5 3 16 16

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Upper value of setting range 6 7.5 28 28

Terminal capacity

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Solid, mm

Flexible with ferrule, mm

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Flexible with cable lug, mm

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Stranded with cable lug, mm

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Solid or stranded, AWG 14 - 8 14 - 2 3 / 0 250 kcmil

Flat conductor (number of segments x width x thickness, mm

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Busbar—width (mm) — — — 25

Terminal screw M4 M6 M10 M10 x 35

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Tightening torque

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Nm 1.8 3.5 10 18

Lb-in 16 31 88.5 159.31

Too ls

Pozidriv screwdriver Size 2 Size 2 — —

Standard screwdriver 1 x 6 1 x 6 — —

Hexagon socket head spanner (SW) — — 5 mm 16 mm

Notes

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Damp heat, constant, to IEC 60068-2-78; damp heat, cyclic, to IEC 60068-2-30.

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Ambient temperature operating range to IEC/EN 60947, PTB: –5°C to 50°C.

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6 mm2 flexible with ferrules to DIN 46228.

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Main contact terminal capacity, solid and stranded conductors with ferrules: When using two conductors use identical cross-section.

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) Vac 690 690 690 1000

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XT IEC Power Control

UL, CSA

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–25°C to 55°C
[–13°F to 131°F]

10g 10g 10g 10g

Finger and
back-of-hand proof

) Vac 690 690 690 1000

2 x (1–6) 2 x (1–16) 2 x (4–16) —

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2 x (1–4)

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2 x (1–6)

— — — 50–240

— — — 50–240

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) — — — 6 x 16 x 0.8

IEC/EN 60947, VDE 0660,
UL, CSA

–25°C to 55°C
[–13°F to 131°F]

Finger and
back-of-hand proof

1 x 25

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2 x (1–10)

IEC/EN 60947, VDE 0660,
UL, CSA

–25°C to 55°C
[–13°F to 131°F]

Finger and
back-of-hand proof

1 x (4–70)
2 x (4–50)

IEC/EN 60947, VDE 0660,
UL, CSA

–25°C to 50°C
[–13°F to 122°F]

Finger and
back-of-hand proof

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V5-T1-136 Volume 5—Motor Control and Protection CA08100006E—February 2015 www.eaton.com