thermal overload

7/22/2019 Thermal Overload

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Thermal overload relaysType TA

Cla ss 10

Description• Availab le for sta rter co nstruction with

A Line contac tors and s eparate pa nel

mounting

• Designed for close couple mounting

• Sepa rate base mounting availab le for all

overload relays

• Class 10 adjustable overloa d relays a re

standard with all ABB Line starters

• Reset can also be adjusted to function as a

stop button

• Sc rewdriver guide holes

• All terminal screw s a re ava ilab le from the

front

• UL File No: E48139

• CS A File No: LR98336

• Trip indica tion

• Remote trip and reset option availab le

• Single phase and phase unbalance protect io

• Iso lated alarm circuit (N.O.) co ntac t

• Ambient compens ation:

-25°C to + 55°C (-13oF to + 131oF)

• Manual test

• Manual or automatic reset

• Factory calibrated and tested

• Wide adjustment range

Tripping classes of the thermal overload relays

Sta nda rd clas ses in IEC 947-4-1 are clas ses : 10 A, 10, 20, 30. The tripping clas s indicate s

according to IEC 947-4-1 the maximum tripping time in seconds under specified conditions of

test at 7.2 times the setting current and specifies tripping and non tripping times for 1.5 and 7.2

times the setting current. Mostly used class is 10 A.

Abstract from IEC 947-4-1Tripping clas s 10 A 10 20 30

Max. tripping timeat 1.5 x se tting current (s) 120 240 480 720(wa rm state)

Tripping t ime a t7.2 x se tting current (s) 2 – 10 4 – 10 6 – 20 9 – 30(cold s tate)

At 1.05 x se tting current no tripping



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2.2 Low Voltage P roducts &Systems1SXU 000 023 C0201 ABB Inc. • 888-385-1221 • www.a bb-control.com

Description

TA thermal overload relays are use d w ith A Line c onta cto rs for the protec tion ofmoto rs ha ving a nominal voltag e o f up to 600VAC m ax per UL/CS A (690VAC and800VDC per IEC).

Product range

• Standard relays:Typ es : TA25DU , TA42DU , TA75DU, TA80DU, TA110DU , TA200DU a nd TA450DU

– TA25 t o TA110 and TA200 are d irectly c onnec ted in the moto r circuit.– TA450DU relays a re fed through a linea r type transformer

• Special constructionThermal overloa d relays with different certific ations a nd approva ls.Relays for protection EEx e motors.

Construction and function• General

Thermal O/L relays a nd their ac ces so ries me et UL, CSA and mo st othe r importa ntinternational standards (IEC), European standards (EN) and the most important

nationa l stand ards (DIN-VDE, NFC-UTE, BS , etc. ). They mee t the ce rtific ationand approval directives required throughout the world.

Thermal overload relays are 3 po le. The mot or current flows through their bimeta ls(1 per phase) which are indirectly heated. Under the effect of the heating, thebimetals b end, ca use the relay to trip a nd the pos ition of the auxiliary co ntacts tochange.

The relay s etting range is g radua ted in amps . In comp lianc e with internationa l andnational standards, the setting current is the motor nominal current and not thetripping current (no tripping at 1.05 x se tting c urrent, tripping at 1.2 times s ettingcurrent).

The tripping c urves (cold o r warm s tarting, 3 phas es and 2 phase s) are shown onpag e 2.14.

The relays a re built to b e se lf protec ting in the event of a n overload until the shortcircuit protection device is activated.

Frame size

TA... .DU

Amp setting range

Signaling contact, (97, 98) Term ina ls T1, T2, T3

Manual test

Manual or automatic reset

Trip ind ica tion light

Tripping co nta ct (95, 96)

Terminals L1, L3, L5



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{

Description

ApplicationTechnical data• All the relays have:

– Free tripping: the resetting butto n, even if held in, does not prevent tripping of the therma l overloa d relay in the

event of a fault.– Tempera ture co mpens ation– P has e failure protec tion ac co rding to IEC 947-4-1: Within the limits of the s etting rang e, a red uced tripping time, a nd

thus improved motor protection, is obrtained in cas e of a phase failure.– Tripping c las s : 10A, for TA relays– Tes t functions a nd res etting: see tab le below.

• Auxiliary contactsThe relay s ha ve two b uilt in auxiliary conta cts : NC marked 95-96; NO marked 97-98. Both c onta cts are phys ically sep ara teand can thus be used for 2 different circuits (control circuit and indication circuit).

Function of TA25DU – TA450DU thermal O/L relays

Resetting Relay tripped 95-96 Open Relay not tripped 95-96 Close97-98 Closed 97-98 Open

Contacts Manual Automatic Both manual and automatic

Effect of blue Resetting Yes No No

button indexed 95-96 Closed when theon R button is pressed

No effect No effect(RESE TO NLY)97-98 Open when the

button is pressed

Effect of blue Resetting Yes No No

button indexed95-96

Closed when the Open when the button is pressedon R/O button is releas ed Closed when the button is releas ed

(RES ET/OFF)97-98

Open when theNo effect

button is pressed

No effect

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TA25DU



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Selection guideTA25DU – TA80DU

Types TA25DU TA42DU TA75DU TA80DU

Main characteristics

Construction 3 pole with ambient temperature variation com pensa tion.Protection ag ainst single phase o peration. Built in auxiliary contac ts: 1N.O. + 1N.C.

Resetting Convertible: Manual to Automatic

Setting ranges Number 18 3 6 4

from 0.1 – 0.16A 18 – 25A 18 – 25A 29 – 42Ato 24 – 32A 29 – 42A 60 – 80A 60 – 80A

Mounted with contactors

Mounting kit No kit is req uired for mounting the rmal O/L relays below co nta cto rs

Type s of co nta ct ors A/AE/AL9

for co mb ined mo unting A/AE/AL12

A/AE/AL16

A/AE/AL26

A/AE/AL30 A/AE30

A/AE/AL40 A/AE40

A/AE/AF50

A/AE/AF63

A/AE/AF75

A/AE/AF95

A/AE/AF110

Mounted separately(i.e. separate from contactor)Sepa rate mounting kit DB25 DB80

AccessoriesTripping co il DS 25-A

Resetting coil DR25-A

Terminal shroud Terminals protected ag ainst direct conta ct (without the ad dition of terminal shrouds)

Function ma rkers BA5-50



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Selection guideTA110DU – TA450DU

Types TA110D U TA200D U TA450D U

Main characteristics

1 Terminals protected ag ainst d irect c ontac t (without the a ddition of terminal shrouds)

1 3 5R

2 4 6

95 97

96 98

Construction 3 pole with ambient temperature variation com pensa tion.Protection ag ainst single phase o peration. Built in auxiliary contac ts: 1N.O. + 1N.C.

Resetting Convertible: manual to automatic

Setting ranges Number 2 6 3

from A 65 – 90 65 – 90 130 – 185

to A 80 – 110 150 – 200 220 – 310

Mounted with contactors

Mounting kit No kit is required for mounting therma l O/L relays Se e pa ge 2.7.

Types of co ntac torsfor comb ined mounting

A/AE/AF95A/AE/AF110

A/AF145A/AF185 A/AF210 + DT450/A300

A/AF260 + DT450/A300

A/AF300 + DT450/A300

Mounted separately (i.e. separate from contactor)

Sepa rate mounting kit DB200 No kit required for sepa rate mounting of thermal O/L relays

AccessoriesTripping co il

Resetting coil

Termina l sh roud 1 LT200 – LT450 –

Function ma rkers BA5-50



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Accessories

DB 25/25A

DB80

DB200

LC26-B1

Separate mounting kits

Flat pin terminal blocks

Terminal block — AWG #8 cable

Mounting kit – for TA450 o verloa d relay

A145 – A185 DT450/A185$ 22

A210 – A300 DT450/A300

Catalog LisFor conta ctor number pric

LC terminal blocks can b e used to co nvert sta ndard co nnections into Faston c onnections: 2 x 6.3mm or 4 x 2.8mm per poleThe connections are protected a ga inst ac cidental contact.

The LC30-Thas a te rminal block for the 3 po wer terminals a nd a sec ond fo r the 4 auxiliary terminals o f a TA25DU thermalO/L relay.

The LC26-B1 has tw o identica l terminal bloc ks ea ch for 3 pow er terminals. This block allows the p ow er terminals to b emounted with tw o DB 25 kits or a TA25DU thermal O/L relay a nd DB 25 kit a ss embly.

NOTE: Acc ording to DIN 46429 part 1 and NFC 20-120 the max. c apa city of a Fas ton c onnec tion is 25 A.

Terminal shrouds – for contac tors and o verloa d relays

Overload Ca talog List Contactor relay numbe r price

A9 – A16TA25DU

Included —

A26 – A40

A30 – A40 TA42DU Includ ed —

A50 – A75 TA75DU Includ ed —

A95 – A110

TA80DUIncluded —

TA110D U

A145 – A185 TA200D U LT185-AY $ 10

A145 – A185 Loa d sid e of TA200DU LT200A185 50

Terminal lug kitsWire For Ca talog List

range overloa ds number price

6 – 250MC M TA110DU , TA200DU EHTK210 $ 90

4 – 400MC M TA450DU 185 ATK300HK 78 (2) 4 – 500MC M TA450DU 310 ATK300/2HK 120

Discount schedule ABA — A-contacto r acc ess oriesDiscount schedule TAA — TA25

Discount schedule TBA — TA42, TA75Discount schedule TCA — TA80, TA110, TA200, TA450

For O/LAmps

Catalog Lisrelays number pric

TA25DU 0.1 – 25 DB 25/25A $ 30TA25DU 24 – 32 DB 25/32A 38

TA42DU, TA75DU, TA80DU 18 – 80 DB 80 45TA110DU, TA200DU 100 – 200 DB 200 60

Catalog LisMounting on: numbe r pric

TA25DU relay LC30-T$ 6

DB 25/25A or DB 25/32A LC26-B 1

Catalog LisMounting on: numbe r pric

TA25DU (25A or les s ) or DB 25/25A DX25 $ 1



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1 Ca nnot be use d w ith TA42, TA75, or TA200 overloa d relay s.

DS25A

DR25A

Application• The DS 25-A co il is used for remote e lectrica l tripping o f the TA25 DU therma l O/L relay a nd is c onnec ted to the relay 'snormally closed 95-96 auxiliary contact.

• The DR 25-A co il is use d fo r remo te elec trica l res etting o f the TA25DU the rma l O/L relay w hich is

adjusted for “Manual resetting;” it is connected to the relay’s normally open 97-98 auxiliary contact.The coils are not designed for continuous duty. Impulse duration: 0.2 to 0.35 s.

Set the button to “Man” (Manual resetting).

Mounting: clipped on to TA25DU th erma l O/L rela y.

Installation diagrams

For connection of DS25-A to TA25DU relay For connection of DR25-A to TA25DU relay

Remote tripping coils

Discount schedule TAA — TA25

Accessories

23 24

13 14

HAND

OFF

AUTO

M

13 14

A1 A2M

95 96

O L

21 22

STOPSTART

13 14

E1 E2

OLTRIPPING

COIL

OVERLOADTRIP

L1 L2/N

A1 A2M

96

O L

E1 E2

OLTRIPPING

COIL

OVERLOADTRIP

L1 L2/N

95 23 24

13 14

HAND

OFF

AUTO

M

13 14

A1 A2M

95 96

O L

21 22

STOP

START

13 14

E1 E2

OLRESETTING

COIL

OVERLOADRESET

L1 L2/N

A1 A2M

96

O L

E1 E2

OLRESETTING

COIL

OVERLOADRESET

L1 L2/N

95

97 98

O L

97 98

O L

U voltag e a t 50/60 Hz Catalog Listnumber1 price

DS 25-A remot e tripping co il24V DS25-A-2448V DS25-A-48110V DS 25-A-110220/380V DS 25-A-220/380500V DS 25-A-500

$ 60

DS25-A remote resetting coil

24V DR25-A-2448V DR25-A-48110V DR25-A-110220/380V DR25-A-220/380500V DR25-A-500



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Ambient temperature compensationThermal O/L relay s a re compens ate d ag ainst a mbient tempera turevariations by a compensation bimetal which is sensitive to the

ambient temperature.

Thermal O/L relays are des igned to operate betw een –5 °C and

+ 40 °C in compliance with standa rd IEC 947-4-1. For a wider range

of –25° C to + 55 ° C consult the graph opposite.

Example: tripping at –25 ° C. Tripping ta kes plac e be fore 1.5 times

the setting current.

Resetting:TA25DU – TA450 DU therma l O/L relays ha ve co nvertiblemanua l/auto ma tic rese tting.

Delivery: in ma nual resetting mod e.

Switching frequency

in relation to load fac tor.

ta: motor starting time.

TA thermal O/L relay c old-sta te

tripping c harac teristics

Technical dataTA25DU – TA450DU

Switching frequency:To a void untimely tripping, TA and Ttherma l O/L relays have bee n des igned to withsta nd roughly 15 sw itching opera tioper hour with an approximately equal distribution between working and rest cycles.

In these c onditions, the motor sta rting time must not exceed 1 s econd and the s tarting current must be lower than or eq

to 6 times the motor In.For intermittent operations, the diagram opposite specifies relay operating limits.

Example: Motor sta rting time: 1 sec .

Load factor: 40 %

Sw itching frequency: 60 ops./h ac cording to diagram

For a higher number of operations and for load variations (e.g. frequent starting and braking), it is advisable to uCU S TORAPID® protection.

For motors subject to particularly severe operating conditions (e.g. locked rotor) it is advisable to use protection combinewith a thermal O/L relay and the C US TORAP ID® system.

Protection of motors with long starting timeSee electronic overloa d relay sec tion, pa ges 2.21 - 2.32.

Mounting positionOn a support at a n ang le of ± 30° in relation to the vertica l plane (standa rd position).

Other mounting positions possible, except mounting on a horizontal plane (in this case the tripping

mecha nism w ould be loca ted ab ove the bimetals).Special version for EEx e motorsConsult fac tory.

Tripping limits at ambient temperatures varying by + 20°C

0 20 40 60 80 100(%)Closin time

0

20

40

60

80

100

120

140

S w i t c h i n g f r e q u e n c y

(ops/h)

t

a = 0 . 5 s

t a = 1 s

t a = 1 .5 s

t a = 3 s

t a = 3 .5 s

Intermittent duty

Ambient temperaturecompensation limitsaccording to IEC 947-4-1

No tripping

M u

l t i p l e

o f

t h e s e

t t i n g c u r r e n

t

Tripping

Ambient temperature-20 -10 0 10 20 30 40 50

0.9

1.0

1.1

1.2

1.3

1.4

1.5

40

20

1110

6

4

3

2

13 4 5 6 7

7.4

8

[s]

Multiple of the setting current

T r i p p i n g t i m e



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A1 A 2

Types TA25DU TA42DU TA75DU TA80DU

Standards:IEC 947-4-1, EN 60947-4-1

(international, Europea n)

Rated insulation voltage Ui

V 690

according to IEC 947-4-1Rated impulse w ithstand voltag e U

impkV 6

according to IEC 947-4-1

Permissible ambient temperature– for storag e °C –40 to + 70– for operation °C –25 to + 55 with temperature compens ation (maximum values: see pag e 2.9)

Clima tic withsta nd DIN 50017 Humidity in alternate climate KFW, 30 cyc les

Mounting pos itions On a suppo rt at an ang le of ± 30° in relation to the vertica l plane (sta nda rd pos ition). Other pos itionspossible except mounting on a horizontal plane (in this case the tripping mechanism

would be located abo ve the bimetals).

Shoc k withstand shock duration ms 15at nominal I

eCritica l directionof sho cks A1, A2 multiples of g 12

Resistance to vibrations(± 1 mm, 50 Hz) multiples of g 8

Mounting – on conta ctor Latching below the conta ctor, sc rew fixing on main terminals

– se para te with DB - kit Using sc rews : 2 x M4 or 35 mm EN 50022

Terminals and cros s-se ctiona l area s TA25DU se tting rang es:for ma in co nducto rs (moto r side) from 0.1-0.16A 24-32 A • sc rew terminal to 18-25A

– with ca ble clamp M4 –– via tunnel co nnecto r – M5 M6 M6 M6– fla t type for lug or ba r – – – – –

• conductor cross-sectional area– rigid so lid or rigid stra nded mm2 2 x 1.5 - 6 1 x 10 1 x 2.5 - 35 or 2 x 2.5 x 16– flexible with ca ble end mm2 2 x 1.5 - 4 2 x 0.75- 6 1 x 2.5 - 25 or 2 x 2.5 x 10– recommended ba rs mm – – – – –

Terminals and c ross -sec tional areafor auxiliary conductors

• sc rew terminal (sc rew size)– with ca ble clamp M 3.5

• conductor cross-sectional area– rigid so lid or rigid stra nded 2 x mm2 0.75 - 4

– flexible with ca ble end 2 x mm2 0.75 - 2.5Deg ree of protection All the terminals are protecte d ag ainst direct co ntac t ac co rding to All the terminals are

VDE 0106/Pa rt. 100. (without ad ditiona l terminal shrouds ) protecte d ag ainst direct

direct contact according toVDE0106/pa rt 100 (with

additional terminal shroudsfor the ma in terminals

Pole Technical CharacteristicsTypes TA25 TA42 TA75 TA80 TA10 TA200 TA450

DU DU DU DU DU DU DU

Number of poles 3

Setting ranges see page 2.6

Tripping cla ss ac co rding to IEC 947-4-1, EN 60947-1 10 A

Rate d opera tional frequenc ies Hz 0 - 400 50/60

Max. sw itching frequenc y Up to 15 sta rts/h or 60 sta rts/h with 40 % on-loa d fac tor when neitherwithout untimely tripping the sta rting current of 6 x I

nnor the starting time 1 s a re exceeded.

Resistance per phase in mΩand heat dissipation in W see pag e 2.13



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A1 A 2

Types TA110DU TA200DU TA450DU

Standards:IEC 947-4-1, EN 60947-4-1

(international, Europea n)

Rated insulation voltage Ui

V 690 1000

according to IEC 947-4-1Rated impulse w ithstand vo ltag e U

impkV 6 8

according to IEC 947-4-1

Permissible ambient temperature– for storag e ° C –40 to + 70– for operation ° C –25 to + 55 with temperature compens ation (maximum values: see page 2.9)

Clima tic withsta nd DIN 50017 Humidity in alternate clima te KFW, 30 cyc les

Mounting pos itions On a suppo rt at an ang le of ± 30° in relation to the vertica l plane (sta nda rd pos ition). Other pos itionspossible except mounting on a horizontal plane (in this case the tripping mechanism would

be located abo ve the bimetals).

Shoc k withstand shoc k duration ms 15at nominal I

eCritica l directionof sho cks A1, A2 multiples of g 12

Resistance to vibrations(± 1 mm, 50 Hz) multiples of g 8

Mounting – on conta ctor 4 x M5 screws– separate with DB - kit

Terminals and cros s-se ctiona l area sfor main conductors (motor side)

• screw terminal– with ca ble clamp – – –– via tunnel co nnecto r HC, M8 – –– flat type for lug or ba r – M10 M10

• conducto r cross-sec tional area– rigid s olid o r rigid s trande d mm2 16 – 35 25 – 120 2 x 240– flexible with cable end mm2 16 – 35 25 – 95 2 x 240– recommended bars mm 12 x 3 20 x 4 20 x 4...5

Terminals and c ross -sec tional areafor auxiliary conductors

• screw terminal (screw size)– with ca ble clamp M 3.5

• conducto r cross-sec tional area– rigid so lid or rigid stra nded 2 x mm2 0.75 - 4

– flexible with ca ble end 2 x mm2 0.75 - 2.5

Degree of protection All the terminals are protected ag ainst direct conta ct ac cording toVDE 0106/P a rt. 100. (with a dd itiona l termina l shro uds )

Technical characteristics of auxiliary contacts for thermal O/L relays: TA25DU to TA450DU

Auxiliary co ntac ts normally close d N.C. normally open N.O.

Termina l ma rking 95-96 97-98

Rated o perational voltage Ue VAC 500 500

Conventional thermal current (in free air) I th A 10 6

Rated operational current Ie, AC-15up to 240 V A 3.0 1.5up to 440 V A 1.9 0.95up to 500 V A 1.0 0.75

Rated operational current Ie DC-13up to 250 V A 0.12 0.04

Protection a ga inst s hort circuitsgG (gl) fuses (ac co rding to IEC 269) A 10 6S 271/S 281circuit-brea ker A k3 k1

Maximum po tent ial differenc e VAC 500 500betw een N.C. and N.O. auxiliary co ntac ts VDC 440 440



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Technical dataMotor protection; Choice of protective device

Note: FusesFuses d o not protect motors a ga inst o verloa ds. They a re only used to protect installations a nd lines a ga inst s hort circuits.

To ens ure effic ient protection of a motor ag ainst short circuits, it is advisab le to use a M type fuses in as soc iation with thermalOLR relays.

For the selection of fuses or circuit-breakers, refer to the indica tions given in this ca talogue c oncerning c ontac tors on the onehand and thermal O/L relays on the o ther.

In general, fuse protection for direct-on-line starting must be sized as follows:– aM fuses: choose the fuse rating immediately above the full load value of the motor current.– gG (gI) fuses: d etermine the fuse rating immediately a bove the motor c urrent value and choos e the next highest fuse rating.

Protection efficiency:

❑ unsuitable

■ very average efficiency

● perfectly efficient

M3~

M3~

M

3~

M

3~

SPEM

Motor Protection — generalIt is very important to c hoose an a deq uate protective device for the safety of the motor d uring o peration a nd for its durability.The effic iency of protect ion methods varies ac co rding to the a pplica tion. The overview below w ill help you to choo se.There is no g eneral rule a nd w e a re ava ilab le to ad vise you for spec ial applica tions and espec ially in the c as e o f difficult s tarting.

Protective devices and efficiencyProtection in relation to current: Protection in relation to temperature:

Fuses Protec tive relay with Motor protection Motor protectionphas e fault protection via CUS TORAPID® via SP EM electronic

thermis tor rela y

Causes of dangerous overloads for the motor windings

1 Overloa d with current ❑ ● ● ● 1.2 times the no minal current

2 S1-S 8 nominal duties ❑ ■ ● ●

according to IEC 34-I

3 Operation with sta rting, ❑ ■ ● ●

braking, reversal in operating direction

4 Operation with sta rting ❑ ■ ● ●

rate a t > 15 cycles /hour

5 Locked rotor ■ ● ■ for motors with ●

spec ial rotor

6 Overloa ds due to phase failure ❑ ● ● ●

7 Netwo rk undervoltag e or overvoltag e ❑ ● ● ●

8 Fluctua tion of network frequenc y ❑ ● ● ❑

9 Ambient temperature too high ❑ ● ● ❑

10 Overheating due to external ❑ ❑ ● ❑

ca use (i.e. overheating of b earings)

11 Motor cooling disturbed ❑ ❑ ● ❑

12 Undercurrent protect ionon drop in load

13 Protection of as ymmetry:wrong phas e direction

rotation o r as ymmetrica l load

14 Earth fault protect ion

15 Automa tic disc onnec tion forauxiliary load fault



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Technical dataResista nce a nd J oule loss es per phase

S hort c ircuit protec tion

Resistance and Joule losses per phase, short circuit protection

Jo ule losses Setting range Resistance per phase at

current per phas e max. setting

from – toA A mΩ W

TA25DU0.1 – 0.16 85850 2.2

0.16 – 0.25 85150 2.20.25 – 0.4 13750 2.2

0.4 – 0.63 5370 2.20.63 – 1.0 2190 2.2

1.0 – 1.4 1120 2.2

1.3 – 1.8 670 2.21.7 – 2.4 383 2.22.2 – 3.1 229 2.2

2.8 – 4.0 137 2.23.5 – 5.0 87.5 2.24.5 – 6.5 61 2.2

6.0 – 8.5 30.4 2.27.5 – 11 18.2 2.2

10 – 14 11.2 2.213 – 19 6.3 2.318 – 25 4.7 2.924 – 32 3.2 3.3

TA42DU18 – 25 5.5 3.4322 – 32 2.89 2.9129 – 42 1.84 3.24

TA75DU18 – 25 5.5 3.4322 – 32 2.89 2.9129 – 42 1.84 3.2436 – 52 1.3 3.5145 – 63 0.936 3.7260 – 80 0.615 3.94

TA80DU29 – 42 1.84 3.2436 – 52 1.3 3.51

45 – 63 0.936 3.7260 – 80 0.615 3.94

Jo ule losses Setting range Resistance per phase at

current per phas e max. setting

from – toA A mΩ W

TA110DU80 – 110 0.378 3.78

TA200DU100 – 135 0.318 5.79110 – 150 0.255 5.74130 – 175 0.214 6.55150 – 200 0.182 7.28

TA450DU130 – 185 — 2.5165 – 235 — 2.5220 – 310 — 2.5



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M i n u t e s

Tripping currentin multiples of the setting current

S e c o n d s

120100

80

60

40

40

20

20

10

10

8

8

6

8

6

4

4

2

2

1

1

0.8 1 2 3 4 5 6 7 8 9 101 .2 1 .5

from warm state

from cold state

3 Phases

3 Phases

2 Phases

2 Phases T r i p p i n g t i m e

M i n u t e s


S e c o n d s

120100

80

60

40

40

20

20

10

10

8

8

6

8

6

4

4

2

2

1

1

0.8 1 2 3 4 5 6 7 8 9 101 .2 1 .5

from warm state

from cold state

3 Phases

3 Phases

2 Phases

2 Phases


M i n u t e s


S e c o n d s

120100

80

60

40

40

20

20

10

10

8

8

6

8

6

4

4

2

2

1

1

0.8 1 2 3 4 5 6 7 8 9 101 .2 1 .5

from warm state

from cold state

3 Phases

3 Phases

2 Phases

2 Phases

6

8

0.8 1 1.2 1.5 2 3 4 5 6 7 8 9 10

1

2

4

8

10

20

40

1

2

4

6

10

20

40

60

80

100

120

from warm state

from cold state

3 Phases

3 Phases

2 Phases

2 Phases


M i n u t e s


S e c o n d s

6

8

0.8 1 1.2 1.5 2 3 4 5 6 7 8 9 10

Tripping currentas multiple of setting current

1

2

4

8

10

20

40

1

2

4

6

10

20

40

60

80

100120

T r i p i n g t i m e m

i n u t e s

s e c o n d s

from warm state

from cold state

2 Phase

3 Phase

2 Phase

3 Phase

TA200DU TA450DU(tripping clas s 10A) (tripping cla ss 10A)

Technical dataTripping c urves

TA25DU TA75DU TA110D U/SU TA450D U

Thermal O/L relay tripping curves

TA25DU TA42DU, TA75DU and TA80DU TA110DU(tripping clas s 10A) (tripping cla ss 10A) (tripping clas s 10A)

TA-DU thermal O/L relays are 3-pole with manual or a utomatic res etting mode selection.

The resetting button can a lso be used for stopping.

Built-in a uxiliary conta cts are phys ically s epara te a nd, c onse quently, ca n be used in different circuits (control circuit/indication c ircuit).

Each relay is temperature compensated and ensures phase failure protection.

Protec tive relays up to size TA75DU are protec ted ag ainst d irect conta ct via the front fa ce. Terminal shrouds are a vailab le for TA200DU to TA450DU size relays .

The co nnecting terminals a re delivered in open position with (+ ,-) pozidriv sc rews a nd s crewd river guidance. It is a dvisab le to tighten unused terminal sc rews.



2T h e r m a l



Approximate dimensionsT25DU – TA42DU

TA25DU

TA42DU

TA25DU & DB25

TA25DU & DB25/32

TA42DU / TA75DU & DB80

00.0000.00

Inches

[Millimeters]

0.24

3.7094

0.5113

3.1580

1.7344

3.7094

6

TA25DU32only

3.5490

0.246

4.35110.5

2.1354

0.5113

3.31

84

1.7344

0.356

4.25108

0.246

0.51

13

1.3835

1.8848

4.2

0.17

1.3835

1.8848

4.2

0.17

0.356

4.25108

0.246

0.51

13

1.7344

4.41112

0.5113

3.8698

2.3660

5.03127.7

0.246

1.9750

2.9575



2

2 T h e r m a l

O v e r l o a d

r e l a y s


3.9993

2.1354

0.246

4.35110.5

0.5113

6 - 0.21 HOLES

2.5264.0

0.24

6.0

.6115.5

1.9850.2

1.4837.5

3.1480.0

5.44138.1

TOUCH SAFE COVER

4.73120.1

0.24

6.0

0.07

1.7

1.18

2 - M4 Mtg.Slots

30.0

0.4712.0

0.4712.0

3.77

2.85

54.0

95.7

72.3

4.37

0.5012.5

111.0

TOUCH SAFE COVER

2.12

TA200DU

00.0000.00

Inches

[Millimeters]

Approximate dimensionsTA75DU – TA200DU

TA75DU

TA80DU

TA110DU



2T h e r m a l



Approximate dimensionsTA450DU

TA450DU

168.0

4.5

58.0 58.0

21.0

28.3

0.18

6.62

2.282.28

1.11

0.82

6.0 76.0

24.5

55.0

193.0

2.17

0.96

7.60

0.24 2.99

5.0 DIA.

0.2 DIA.

642

00.0000.00

Inches

[Millimeters]



2

2 T h e r m a l

O v e r l o a d

r e l a y s

Notes

thermal overload

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