ABB TF42 Thermal Overload Relays



ABB TF42 Thermal Overload RelayThermal Overload Relay Applications

  • Temperature compensation from -25  +60 °C
  • Adjustable current setting for overload protection
  • Automatic or manual reset selectable
  • Suitable for three- and single-phase application
  • Trip-free mechanism
  • Status indication
  • STOP and TEST function
  • Direct mounting onto block contactors
  • Sealable operating elements

Description

  • 45mm width
  • Suitable for contactor AF09 … AF38
  • Sealable operating elements

Application / internal function

The thermal overload relays are three pole relays with bimetal tripping elements (1 per pole). The motor current flows through the bimetal tripping elements and heats them directly and indirectly. In case of an overload (over current), the bimetal elements become bent as a result of the heating. This leads to a release of the relay and a change of the contacts switching position (95-96 / 97-98). The contact 95-96 is used to control the load contactor.

The overload relays have a setting scale in Amperes, which allows the direct adjusting of the relay without any additional calculation. In compliance with international and national standards, the setting current is the rated current of the motor and not the tripping current (no tripping at 1.05 x I, tripping at 1.2 x I; I = setting current). The relays are constructed in way that they protect themselves in the event of an overload. The overload relay has to be protected against short-circuit. The appropriate short-circuit protection devices are shown in the table.

Ordering Details

Setting Ranges Type Order Code Max. Fuse Suitable for Contactors
0.31 … 0.41 TF42-0.41 1SAZ721201R1014 2gG AF09 – AF38
0.55 … 0.74 TF42-0.74 1SAZ721201R1021 4 gG AF09 … AF38
0.74 … 1.00 TF42-1.0 1SAZ721201R1023 6 gG AF09 … AF38
1.00 … 1.30 TF42-1.3 1SAZ721201R1025 6 gG AF09 … AF38
1.30 … 1.70 TF42-1.7 1SAZ721201R1028 10 gG AF09 … AF38
1.70 … 2.30 TF42 – 2.3 1SAZ721201R1031 10 gG AF09 … AF38
2.30 … 3.10 TF42-3.1 1SAZ721201R1033 10 gG AF09 … AF38
3.10 … 4.20 TF42-4.2 1SAZ721201R1035 20 gG AF09 … AF38
4.20 … 5.70 TF42-5.7 1SAZ721201R1038 20 gG AF09… AF38
5.70 … 7.60 TF42-7.6 1SAZ721201R1040 35 gG AF09 … AF38
7.60 … 10.0 TF42-10 1SAZ721201R1043 35 gG AF09 … AF38
10.0 … 13.0 TF42-13 1SAZ721201R1045 40 gG AF09 … AF38
13.0 … 16.0 TF42-16 1SAZ721201R1047 40 gG AF09 … AF38
16.0 … 20.0 TF42-20 1SAZ721201R1049 63 gG AF09 … AF38
20.0 … 24.0 TF42-24 1SAZ721201R1051 63 gG AF09 … AF38

Technical Data

Overload Relay Type

TF42



Up to 20.0 A Up to 38.0 / 40.0 A
Standards Conformity to standards
IEC / EN60947-1, IEC/EN60947-4-1, IEC/EN60947-5-1,UL 508, CSA C22.2 No. 14

Phase loss sensitivity (acc. to IEC / EN 60947-4-1) Yes
General Data Mounting Position
Position 1

Degree of protection (acc. to IEC 60947-1) IP 20
IEC



Main Circuit Rated Operational Voltage Ue 690 V AC

Rated operational current AC-3 Ie up to 20.0A up to 38.0 / 40.0 A (50oC)

Rated Frequency 50 / 60 Hz

Trip Class 10
Isolation Data Rated impulse withstand voltage Uimp 6kV
(acc. to IEC/EN 60947-1) Rated isnulation voltage Ui 690 V
Environmental Data Ambient air temperature range


Operation Open – compensated -25 … + 60oC


Open -25 … + 60oC

Storage
-50 .. + 80oC

Altitude
≤ 2000m

Vibration (acc. to IEC/EN 60068-2-27) 5 g / 3-150Hz

Shock (acc. to IEC/EN 60068-2-27) 25 g / 11 ms
Auxiliary Circuit Rated Operational Voltage Ue (acc. to IEC/EN 60947-5-1 Utilisation category)

AC-15 110-120V N.C. 3A



N.O. 0.75A


220-230-240 V N.C. 3A



N.O. 0.75A


400V N.C. 0.75A



N.O. 0.75A


480-500 V N.C. 0.75A



N.O. 0.75A


600 V N.C. 0.6A



N.O.

DC-13 24 V N.C. 1.25A



N.O. 1.25A


110-120-125V N.C. 0.55A



N.O. 0.55A


250 V N.C. 0.27A



N.O. 0.27A


500 V N.C. 0.15A



N.O. 0.15A

Minimum Switching Capacity
17 V / 3mA

Short-Circuit Protection Device N.C. 6



N.O. 4
Connecting Capacity Main Circuit Rigid 1 or 2 x 0.75 … 4 mm2 1.5 … 2.5mm2 – 2.5 … 10 mm2


Flexible with ferrule 1 or 2 x 0.75 … 4 mm2 1.5 .. 6 mm2


Flexible without ferrule 1 or 2 x 0.75 … 4 mm2 2.5 … 4 mm2 – 4 … 6 mm2


Stripping Length 12mm


Tightening torque 1.5 … 2.5 Nm 2.5 … 2.7 Nm
UL / CSA



Main Circuit Max. Operational Voltage
600 V AC

Trip Rating
125% of FLA
Connecting Capacity Main Circuit Stranded 1 or 2 x AWG 18 … 10 AWG 14 … 6


Flexible without Ferrule 1 or 2 x AWG 18 … 10 AWG 14 … 6


Stripping length 12mm


Tightening torque 13… 22 lb.in 22 lb.in

Auxiliary Circuit Stranded 1 or 2 x AWG 18 … 12


Flexible without ferrule 1 or 2 x AWG 18 … 12


Stripping Length 9 mm


Tightening Torque 9 … 13lb.in


Want Monthly Offers, Promotions & News?

We only use your email address for one thing, sending you some great stuff!

  • Discount and Promo Codes
  • Special Offers
  • All the latest Industry and CSE news
  • Plus so much more…
Your email address is only kept in our mailing list and not used for any other purposes than for contacting you with our newsletters.

Thank you for signing up to the newsletter