Thermal overload relays
Type TA
Class 10
Thermal
Overload
relays
2
2
Description
• Available for starter construction with
A Line contactors and separate panel
mounting
• Designed for close couple mounting
• Separate base mounting available for all
overload relays
• Class 10 adjustable overload relays are
standard with all ABB Line starters
• Reset can also be adjusted to function as a
stop button
• Screwdriver guide holes
• All terminal screws are available from the
front
• UL File No: E48139
Tripping classes of the thermal overload relays
Standard classes in IEC 947-4-1 are classes: 10 A, 10, 20, 30. The tripping class indicates
according to IEC 947-4-1 the maximum tripping time in seconds under specifi ed conditions of
test at 7.2 times the setting current and specifi es tripping and non tripping times for 1.5 and 7.2
times the setting current. Mostly used class is 10 A.
Abstract from IEC 947-4-1
Tripping class 10 A 10 20 30
Max. tripping time
at 1.5 x setting current (s) 120 240 480 720
(warm state)
Tripping time at
7.2 x setting current (s) 2 – 10 4 – 10 6 – 20 9 – 30
(cold state)
At 1.05 x setting current no tripping
• CSA File No: LR98336
• Trip indication
• Remote trip and reset option available
• Single phase and phase unbalance protection
• Isolated alarm circuit (N.O.) contact
• Ambient compensation:
-25°C to +55°C (-13
• Manual test
• Manual or automatic reset
• Factory calibrated and tested
• Wide adjustment range
o
F to +131oF)
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Description
Thermal
Overload
relays
2
2
TA thermal overload relays are used with A Line contactors for the protection of
motors having a nominal voltage of up to 600VAC max per UL/CSA (690VAC and
800VDC per IEC).
Product range
• Standard relays:
Types: TA25DU, TA42DU, TA75DU, TA80DU, TA110DU, TA200DU and TA450DU
– TA25 to TA110 and TA200 are directly connected in the motor circuit.
– TA450DU relays are fed through a linear type transformer
• Special construction
Thermal overload relays with different certifi cations and approvals.
Relays for protection EEx e motors.
Construction and function
• General
Thermal O/L relays and their accessories meet UL, CSA and most other important
international standards (IEC), European standards (EN) and the most important
national standards (DIN-VDE, NFC-UTE, BS, etc.). They meet the certifi cation
and approval directives required throughout the world.
Thermal overload relays are 3 pole. The motor current fl ows through their bimetals
(1 per phase) which are indirectly heated. Under the effect of the heating, the
bimetals bend, cause the relay to trip and the position of the auxiliary contacts to
change.
The relay setting range is graduated in amps. In compliance with international and
national standards, the setting current is the motor nominal current and not the
tripping current (no tripping at 1.05 x setting current, tripping at 1.2 times setting
current).
The tripping curves (cold or warm starting, 3 phases and 2 phases) are shown on
page 2.14.
The relays are built to be self protecting in the event of an overload until the short
circuit protection device is activated.
Terminals L1, L3, L5
Frame size
TA....DU
Amp setting range
Signaling contact, (97, 98)
Manual test
Manual or automatic reset
Trip indication light
Tripping contact (95, 96)
Terminals T1, T2, T3
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TA25DU
Description
Thermal
Overload
relays
2
Application
Technical data
• All the relays have:
– Free tripping: the resetting button, even if held in, does not prevent tripping of the thermal overload relay in the
event of a fault.
– Temperature compensation
– Phase failure protection according to IEC 947-4-1: Within the limits of the setting range, a reduced tripping time, and
thus improved motor protection, is obrtained in case of a phase failure.
– Tripping class: 10A, for TA relays
– Test functions and resetting: see table below.
• Auxiliary contacts
The relays have two built in auxiliary contacts: NC marked 95-96; NO marked 97-98. Both contacts are physically separate
and 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 Closed
97-98 Closed 97-98 Open
Contacts Manual Automatic Both manual and automatic
Effect of blue Resetting Yes No No
button indexed 95-96 Closed when the
on R button is pressed
(RESET ONLY)
97-98 Open when the
button is pressed
Effect of blue Resetting Yes No No
button indexed
on R/O button is released Closed when the button is released
(RESET/OFF)
button is pressed
Closed when the Open when the button is pressed
95-96
Open when the
97-98
{
No effect No effect
No effect
No effect
{
2
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Selection guide
Thermal
Overload
relays
2
2
Types TA25DU TA42DU TA75DU TA80DU
Main characteristics
Construction 3 pole with ambient temperature variation compensation.
Protection against single phase operation. Built in auxiliary contacts: 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 – 42A
to 24 – 32A 29 – 42A 60 – 80A 60 – 80A
Mounted with contactors
Mounting kit No kit is required for mounting thermal O/L relays below contactors
Types of contactors A/AE/AL9
for combined mounting 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
TA25DU – TA80DU
Mounted separately (i.e. separate from contactor)
Separate mounting kit DB25 DB80
Accessories
Tripping coil DS25-A
Resetting coil DR25-A
Terminal shroud Terminals protected against direct contact (without the addition of terminal shrouds)
Function markers BA5-50
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Selection guide
TA110DU – TA450DU
Overload
relays
2
2
Types TA110DU TA200DU TA450DU
Main characteristics
Construction 3 pole with ambient temperature variation compensation.
Protection against single phase operation. Built in auxiliary contacts: 1N.O. + 1N.C.
R
95 97
35
1
2
46
96 98
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 thermal O/L relays See page 2.7.
Types of contactors
for combined mounting
A/AE/AF95
A/AE/AF110
A/AF145
A/AF185 A/AF210 + DT450/A300
A/AF260 + DT450/A300
A/AF300 + DT450/A300
Mounted separately (i.e. separate from contactor)
Separate mounting kit DB200 No kit required for separate mounting of thermal O/L relays
Accessories
Tripping coil
Resetting coil
Terminal shroud 1 LT200 – LT450 –
Function markers BA5-50
Thermal
1 Terminals protected against direct contact (without the addition of terminal shrouds)
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2
Thermal
Overload
2
relays
TA25DU
TA42DU
TA75DU
TA25 - TA450
Class 10
for Contactors A9 – A/AF300
For Setting range Suffi x Catalog List
contactor A Code number price
0.1 – 0.16 A TA25DU0.16
0.16 – 0.25 B TA25DU0.25
0.25 – 0.4 C TA25DU0.4
0.4 – 0.63 D TA25DU0.63
0.63 – 1.0 E TA25DU1.0
1.0 – 1.4 F TA25DU1.4
1.3 – 1.8 G TA25DU1.8
1.7 – 2.4 H TA25DU2.4
A/AE/AL9 – A/AE/AL40 2.2 – 3.1 J TA25DU3.1
2.8 – 4.0 K TA25DU4.0
3.5 – 5.0 L TA25DU5.0
4.5 – 6.5 M TA25DU6.5
6.0 – 8.5 N TA25DU8.5
7.5 – 11 P TA25DU11
10 – 14 Q TA25DU14
13 – 19 R TA25DU19
18 – 25 S TA25DU25
24 – 32 T TA25DU32
18 – 25 A TA42DU25
A/AE30 – A/AE40 22 – 32 B TA42DU32 78
29 – 42 C TA42DU42
18 – 25 A TA75DU25
22 – 32 B TA75DU32
A/AE/AF50 – A/AE/AF75 29 – 42 C TA75DU42
36 – 52 D TA75DU52
45 – 63 E TA75DU63
60 – 80 F TA75DU80
29 – 42 C TA80DU42
36 – 52 D TA80DU52
45 – 63 E TA80DU63
A/AE/AF95 – A/AE/AF110 60 – 80 F TA80DU80
65 – 90 A TA110DU90
80 – 110 B TA110DU110
65 – 90 A TA200DU90
80 – 110 B TA200DU110
A/AF145 – A/AF185 100 – 135 C TA200DU135
110 – 150 D TA200DU150
130 – 175 E TA200DU175
150 – 200 F TA200DU200
130 – 185 A TA450DU185 1
A/AF210 – A/AF300 165 – 235 B TA450DU235 488
220 – 310 C TA450DU310
AF400 – AF750
See electronic overloads, pages 2.21
$ 63
102
135
165
165
225
TA80DU
TA110DU
1 TA450 overloads require mounting kits for installation.
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Discount schedule TAA — TA25
Discount schedule TBA — TA42, TA75
Discount schedule TCA — TA80, TA110, TA200, TA450
Accessories
Thermal
Overload
relays
2
Separate mounting kits
For O/L
relays number price
TA25DU 0.1 – 25 DB25/25A $ 30
TA25DU 24 – 32 DB25/32A 38
TA42DU, TA75DU, TA80DU 18 – 80 DB80 45
TA110DU, TA200DU 100 – 200 DB200 60
Catalog List
Amps
2
DB25/25A
DB80
DB200
LC26-B1
Flat pin terminal blocks
Catalog List
Mounting on: number price
TA25DU relay LC30-T
DB25/25A or DB25/32A LC26-B1
$ 6
Terminal block — AWG #8 cable
Catalog List
Mounting on: number price
TA25DU (25A or less) or DB25/25A DX25 $ 15
LC terminal blocks can be used to convert standard connections into Faston connections: 2 x 6.3mm or 4 x 2.8mm per pole.
The connections are protected against accidental contact.
The LC30-T has a terminal block for the 3 power terminals and a second for the 4 auxiliary terminals of a TA25DU thermal
O/L relay.
The LC26-B1 has two identical terminal blocks each for 3 power terminals. This block allows the power terminals to be
mounted with two DB25 kits or a TA25DU thermal O/L relay and DB25 kit assembly.
NOTE: According to DIN 46429 part 1 and NFC 20-120 the max. capacity of a Faston connection is 25 A.
Mounting kit – for TA450 overload relay
Catalog List
For contactor number price
A145 – A185 DT450/A185
A210 – A300 DT450/A300
$ 225
Terminal shrouds – for contactors and overload relays
Overload Catalog List
A9 – A16
A26 – A40
A30 – A40 TA42DU Included —
A50 – A75 TA75DU Included —
TA110DU
A145 – A185 TA200DU LT185-AY $ 10
A145 – A185 Load side of TA200DU LT200A185 50
Contactor
relay number price
A95 – A110
TA25DU
TA80DU
Included —
Included —
Terminal lug kits
Wire For Catalog List
range overloads number price
6 – 250MCM TA110DU, TA200DU EHTK210 $ 90
4 – 400MCM TA450DU185 ATK300HK 78
(2) 4 – 500MCM TA450DU310 ATK300/2HK 120
Discount schedule ABA — A-contactor accessories
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Discount schedule TAA — TA25
Discount schedule TBA — TA42, TA75
Discount schedule TCA — TA80, TA110, TA200, TA450
Thermal
Overload
2
Accessories
relays
2
DS25A
DR25A
Installation diagrams
Remote tripping coils
U voltage at 50/60 Hz Catalog List
number 1 price
DS25-A remote tripping coil
24V DS25-A-24
48V DS25-A-48
110V DS25-A-110
220/380V DS25-A-220/380
500V DS25-A-500
DS25-A remote resetting coil
24V DR25-A-24
48V DR25-A-48
110V DR25-A-110
220/380V DR25-A-220/380
500V DR25-A-500
$ 60
Application
• The DS25-A coil is used for remote electrical tripping of the TA25 DU thermal O/L relay and is connected to the relay's
normally closed 95-96 auxiliary contact.
• The DR 25-A coil is used for remote electrical resetting of the TA25DU thermal O/L relay which 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 thermal O/L relay.
For connection of DS25-A to TA25DU relay For connection of DR25-A to TA25DU relay
L1 L2/N
STOP
21 22
START
13 14
M
A1 A2
OL
96
95
M
13 14
OVERLOAD
TRIP
E1 E2
L1 L2/N
START
STOP
M
21 22
13 14
A1 A2
M
13 14
OVERLOAD
RESET
97
OL
98
OL
TRIPPING
COIL
HAND
OFF
23 24
13 14
AUTO
M
A1 A2
OL
96
95
L1 L2/N
OVERLOAD
TRIP
E1 E2
L1 L2/N
HAND
OFF
23 24
13 14
AUTO
OVERLOAD
RESET
M
A1 A2
OL
97
98
OL
TRIPPING
COIL
1 Cannot be used with TA42, TA75, or TA200 overload relays.
OL
95
96
E1 E2
OL
RESETTING
COIL
OL
96
95
E1 E2
OL
RESETTING
COIL
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Discount schedule TAA — TA25
)
Intermittent duty
(ops/h)
140
120
100
ta = 1s
80
60
40
Switching frequency
20
0
0 20 40 60 80 100(%
in relation to load factor.
[s]
40
20
11
10
6
4
3
2
Tripping time
1
3 4 5
Multiple of the setting current
TA thermal O/L relay cold-state
tripping characteristics
ta=0.5s
ta = 1.5s
ta = 3s
ta=3.5s
Closingtime
Switching frequency
ta:
motor starting time.
67
7.4
Technical data
TA25DU – TA450DU
Switching frequency:
To avoid untimely tripping, TA and T thermal O/L relays have been designed to withstand roughly 15 switching operations
per hour with an approximately equal distribution between working and rest cycles.
In these conditions, the motor starting time must not exceed 1 second and the starting current must be lower than or equal
to 6 times the motor I
For intermittent operations, the diagram opposite specifi es relay operating limits.
Example: Motor starting time: 1 sec.
Load factor: 40 %
Switching frequency: 60 ops./h according to diagram
For a higher number of operations and for load variations (e.g. frequent starting and braking), it is advisable to use
CUSTORAPID
For motors subject to particularly severe operating conditions (e.g. locked rotor) it is advisable to use protection combined
with a thermal O/L relay and the CUSTORAPID
Protection of motors with long starting time
See electronic overload relay section, pages 2.21 - 2.32.
Mounting position
On a support at an angle of ± 30° in relation to the vertical plane (standard position).
Other mounting positions possible, except mounting on a horizontal plane (in this case the tripping
mechanism would be located above the bimetals).
Special version for EEx e motors
Consult factory.
Tripping limits at ambient temperatures varying by + 20°C
Ambient temperature compensation
Thermal O/L relays are compensated against ambient temperature
variations by a compensation bimetal which is sensitive to the
ambient temperature.
Thermal O/L relays are designed to operate between –5 °C and
+40 °C in compliance with standard IEC 947-4-1. For a wider range
of –25° C to +55 °C consult the graph opposite.
Example: tripping at –25 °C. Tripping takes place before 1.5 times
the setting current.
Resetting: T A25DU – TA450 DU thermal O/L relays have convertible
8
manual/automatic resetting.
Delivery: in manual resetting mode.
®
protection.
Thermal
Overload
relays
2
2
.
n
®
system.
1.5
1.4
1.3
1.2
1.1
1.0
0.9
Multiple of the setting current
-20 -10 0 10 20 30 40 50
Ambient temperature
compensation limits
according to IEC 947-4-1
Tripping
No tripping
Ambient temperature
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Technical data
Thermal
Overload
relays
2
2
Types TA25DU TA42DU TA75DU TA80DU
Standards:
(international, European)
Rated insulation voltage Ui V 690
according to IEC 947-4-1
Rated impulse withstand voltage U
according to IEC 947-4-1
Permissible ambient temperature
– for storage °C –40 to +70
– for operation °C –25 to +55 with temperature compensation (maximum values: see page 2.9)
Climatic withstand DIN 50017 Humidity in alternate climate KFW, 30 cycles
Mounting positions On a support at an angle of ±30° in relation to the vertical plane (standard position). Other positions
possible except mounting on a horizontal plane (in this case the tripping mechanism
would be located above the bimetals).
Shock withstand shock duration ms 15
at nominal Ie
Critical direction
of shocks A1, A2 multiples of g 12
Resistance to vibrations
(±1 mm, 50 Hz) multiples of g 8
Mounting – on contactor Latching below the contactor, screw fi xing on main terminals
– separate with DB - kit Using screws: 2 x M4 or 35 mm EN 50022
Terminals and cross-sectional areas TA25DU setting ranges:
for main conductors (motor side) from 0.1-0.16A 24-32 A
• screw terminal to 18-25A
– with cable clamp M4 –
– via tunnel connector – M5 M6 M6 M6
– fl at type for lug or bar – – – – –
• conductor cross-sectional area
– rigid solid or rigid stranded mm2 2 x 1.5 - 6 1 x 10 1 x 2.5 - 35 or 2 x 2.5 x 16
– fl exible with cable 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 bars mm – – – – –
Terminals and cross-sectional area
for auxiliary conductors
• screw terminal (screw size)
– with cable clamp M 3.5
• conductor cross-sectional area
– rigid solid or rigid stranded 2 x mm2 0.75 - 4
– fl exible with cable end 2 x mm2 0.75 - 2.5
Degree of protection All the terminals are protected against direct contact according to All the terminals are
VDE 0106/Part. 100. (without additional terminal shrouds) protected against direct
direct contact according to
VDE0106/part 100 (with
additional terminal shrouds
for the main terminals
TA25DU – TA80DU
IEC 947-4-1, EN 60947-4-1
kV 6
imp
A1
A2
Pole Technical Characteristics
Types 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 class according to IEC 947-4-1, EN 60947-1 10 A
Rated operational frequencies Hz 0 - 400 50/60
Max. switching frequency Up to 15 starts/h or 60 starts/h with 40 % on-load factor when neither
without untimely tripping the starting current of 6 x In nor the starting time 1 s are exceeded.
Resistance per phase in mΩ
and heat dissipation in W see page 2.13
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Technical data
TA110DU – TA450DU
Thermal
Overload
relays
2
Types TA110DU TA200DU TA450DU
Standards:
(international, European)
Rated insulation voltage Ui V 690 1000
according to IEC 947-4-1
Rated impulse withstand voltage U
according to IEC 947-4-1
Permissible ambient temperature
– for storage °C –40 to +70
– for operation °C –25 to +55 with temperature compensation (maximum values: see page 2.9)
Climatic withstand DIN 50017 Humidity in alternate climate KFW, 30 cycles
Mounting positions On a support at an angle of ±30° in relation to the vertical plane (standard position). Other positions
possible except mounting on a horizontal plane (in this case the tripping mechanism would
be located above the bimetals).
Shock withstand shock duration ms 15
at nominal Ie
Critical direction
of shocks A1, A2 multiples of g 12
Resistance to vibrations
(±1 mm, 50 Hz) multiples of g 8
Mounting – on contactor
– separate with DB - kit
Terminals and cross-sectional areas
for main conductors (motor side)
• screw terminal
– with cable clamp – – –
– via tunnel connector HC, M8 – –
– fl at type for lug or bar – M10 M10
• conductor cross-sectional area
– rigid solid or rigid stranded
– fl exible with cable end
– recommended bars
Terminals and cross-sectional area
for auxiliary conductors
• screw terminal (screw size)
– with cable clamp M 3.5
• conductor cross-sectional area
– rigid solid or rigid stranded 2 x
– fl exible with cable end 2 x
Degree of protection All the terminals are protected against direct contact according to
VDE 0106/Part. 100. (with additional terminal shrouds)
kV 6 8
imp
A1
A2
2
mm
16 – 35 25 – 120 2 x 240
2
mm
16 – 35 25 – 95 2 x 240
mm 12 x 3 20 x 4 20 x 4...5
2
mm
0.75 - 4
2
mm
0.75 - 2.5
IEC 947-4-1, EN 60947-4-1
4 x M5 screws
2
Technical characteristics of auxiliary contacts for thermal O/L relays: TA25DU to TA450DU
Auxiliary contacts normally closed N.C. normally open N.O.
Terminal marking 95-96 97-98
Rated operational voltage U
Conventional thermal current (in free air) Ith A 10 6
Rated operational current Ie, AC-15
up to 240 V A 3.0 1.5
up to 440 V A 1.9 0.95
up to 500 V A 1.0 0.75
Rated operational current I
up to 250 V A 0.12 0.04
Protection against short circuits
gG (gl) fuses (according to IEC 269) A 10 6
S 271/S 281circuit-breaker A k3 k1
Maximum potential difference VAC 500 500
between N.C. and N.O. auxiliary contacts VDC 440 440
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VAC 500 500
e
DC-13
e
Technical data
Thermal
Overload
relays
2
2
Motor Protection — general
It is very important to choose an adequate protective device for the safety of the motor during operation and for its durability.
The effi ciency of protection methods varies according to the application. The overview below will help you to choose.
There is no general rule and we are available to advise you for special applications and especially in the case of diffi cult starting.
Protective devices and effi ciency
Protection in relation to current: Protection in relation to temperature:
Motor protection; Choice of protective device
Fuses Protective relay with Motor protection Motor protection
phase fault protection via CUSTORAPID
thermistor
M
3~
M
3~
®
via SPEM electronic
M
3~
relay
SPEM
M
3~
Causes of dangerous overloads for the motor windings
1 Overload with current ❑
1.2 times the nominal current
2 S1-S8 nominal duties ❑ ■ ● ●
according to IEC 34-I
3 Operation with starting, ❑ ■ ● ●
braking, reversal in operating direction
4 Operation with starting ❑ ■ ● ●
rate at > 15 cycles/hour
5 Locked rotor ■ ● ■ for motors with ●
special rotor
6 Overloads due to phase failure ❑ ● ● ●
7 Network undervoltage or overvoltage ❑ ● ● ●
8 Fluctuation of network frequency ❑ ● ● ❑
9 Ambient temperature too high ❑ ● ● ❑
10 Overheating due to external ❑ ❑ ● ❑
cause (i.e. overheating of bearings)
11 Motor cooling disturbed ❑ ❑ ● ❑
12 Undercurrent protection
on drop in load
13 Protection of asymmetry:
wrong phase direction
rotation or asymmetrical load
14 Earth fault protection
15 Automatic disconnection for
auxiliary load fault
● ●
●
Protection effi ciency:
❑ unsuitable
■ very average effi ciency
● perfectly effi cient
Note: Fuses
Fuses do not protect motors against overloads. They are only used to protect installations and lines against short circuits.
To ensure effi cient protection of a motor against short circuits, it is advisable to use aM type fuses in association with thermal
OLR relays.
For the selection of fuses or circuit-breakers, refer to the indications given in this catalogue concerning contactors on the one
hand and thermal O/L relays on the other.
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: determine the fuse rating immediately above the motor current value and choose the next highest fuse rating.
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Technical data
Resistance and Joule losses per phase
Short circuit protection
Resistance and Joule losses per phase, short circuit protection
Thermal
Overload
relays
2
2
Joule losses
Setting range Resistance per phase at
current per phase max. setting
from – to
A A mΩ W
TA25DU
0.1 – 0.16 85850 2.2
0.16 – 0.25 85150 2.2
0.25 – 0.4 13750 2.2
0.4 – 0.63 5370 2.2
0.63 – 1.0 2190 2.2
1.0 – 1.4 1120 2.2
1.3 – 1.8 670 2.2
1.7 – 2.4 383 2.2
2.2 – 3.1 229 2.2
2.8 – 4.0 137 2.2
3.5 – 5.0 87.5 2.2
4.5 – 6.5 61 2.2
6.0 – 8.5 30.4 2.2
7.5 – 11 18.2 2.2
10 – 14 11.2 2.2
13 – 19 6.3 2.3
18 – 25 4.7 2.9
24 – 32 3.2 3.3
TA42DU
18 – 25 5.5 3.43
22 – 32 2.89 2.91
29 – 42 1.84 3.24
TA75DU
18 – 25 5.5 3.43
22 – 32 2.89 2.91
29 – 42 1.84 3.24
36 – 52 1.3 3.51
45 – 63 0.936 3.72
60 – 80 0.615 3.94
TA80DU
29 – 42 1.84 3.24
36 – 52 1.3 3.51
45 – 63 0.936 3.72
60 – 80 0.615 3.94
Joule losses
Setting range Resistance per phase at
current per phase max. setting
from – to
A A mΩ W
TA110DU
80 – 110 0.378 3.78
TA200DU
100 – 135 0.318 5.79
110 – 150 0.255 5.74
130 – 175 0.214 6.55
150 – 200 0.182 7.28
TA450DU
130 – 185 — 2.5
165 – 235 — 2.5
220 – 310 — 2.5
Low Voltage Products & Systems 2.13
ABB Inc. • 888-385-1221 • www.abb-control.com 1SXU 000 023 C0201
Technical data
Thermal
Overload
relays
2
2
TA25DU TA75DU TA110DU/SU TA450DU
TA-DU thermal O/L relays are 3-pole with manual or automatic resetting mode selection.
The resetting button can also be used for stopping.
Built-in auxiliary contacts are physically separate and, consequently, can be used in different circuits (control circuit/indication cir cuit).
Each relay is temperature compensated and ensures phase failure protection.
Protective relays up to size TA75DU are protected against direct contact via the front face. Terminal shrouds are available for TA200DU to T A450DU size relays.
The connecting terminals are delivered in open position with (+,-) pozidriv screws and screwdriver guidance. It is advisable to tighten unused terminal screws.
Thermal O/L relay tripping curves
TA25DU TA42DU, TA75DU and TA80DU TA110DU
(tripping class 10A) (tripping class 10A) (tripping class 10A)
120
100
80
60
40
20
10
8
4
Tripping time
2
Minutes
1
40
20
10
2 Phases
868
6
Seconds
4
2
from warm state
1
0.8 1 2 3 4 5 6 7 8 9 101.2 1.5
Tripping current
in multiples of the settingcurrent
3 Phases
from cold state
2 Phases
Tripping curves
3 Phases
Tripping time
120
100
80
60
40
20
10
8
4
2
Minutes
1
40
20
2 Phases
10
868
6
Seconds
4
2
1
0.8 1 2 3 4 5 6 7 8 9 101.2 1.5
Tripping current
in multiples of the settingcurrent
3 Phases
from warm state
from cold state
2 Phases
3 Phases
Tripping time
120
100
80
60
40
20
10
8
4
2
Minutes
1
40
20
3 Phases
10
868
6
Seconds
4
2 Phases
2
from warm state
1
0.8 1 2 3 4 5 6 7 8 9 101.2 1.5
Tripping current
in multiples of the settingcurrent
from cold state
2 Phases
3 Phases
TA200DU TA450DU
(tripping class 10A) (tripping class 10A)
120
100
80
60
40
20
10
8
6
4
2
Minutes
1
40
Trippingtime
20
2 Phases
10
Seconds
8
6
3 Phases
4
2
from warmstate
1
0.8 1 1.2 1.5 2 3 4 5 6 7 8 9 10
Trippingcurrent
in multiplesof the settingcurrent
from coldstate
2 Phases
3 Phases
120
100
80
60
40
20
10
8
6
4
2
minutes
1
40
Triping time
20
10
2 Phase
8
seconds
6
4
3 Phase
2
from warm state
1
0.8 1 1.2 1.5 2 3 4 5 6 7 8 9 10
Tripping current
as multiple ofsetting current
from cold state
2 Phase
3 Phase
2.14 Low Voltage Products & Systems
1SXU 000 023 C0201 ABB Inc. • 888-385-1221 • www.abb-control.com
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