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Thermic Overload relais for contactor KLIBO7,5
according to IEC/EN 60947-4-1
Special features:
- 3-pole
- Can be set to automatic or manual reset
- Reset button with switch-off functionality (test)
- 2 auxiliary switches with galvanic isolation (NO and NC)
- With temperature compensation
- With phase drop-out sensitivity
Technical data:
- Designation
- TA25DU
- Rated operational voltage Ue
- 690 V
- Withstand voltage Uimp
- 6 kV
- Permissible ambient temperature
- -40 °C ... +70 °C = Storage temperature
-25 °C ... +55 °C = Operating temperature - Mounting position
- Any
- Mounting
- Hook into contactor, tighten screws of main terminals
- Connecting terminals
- Screw terminals
- Terminal cross-section
- 2x 1.5-4 mm² (finely stranded with ferrules)
2x 0.75-2.5 mm² (finely straded with ferrules - auxiliary contacts) - Adjustement range
- see versions and article numbers
- Tripping class
- 10 A
- Frequency range
- 0 ... 400 Hz
- Switching capacity
- Up to 15 switching operations per hour or up to 60 switching operations per hour at 40%
Technical data of auxiliary contacts:
- Auxiliary contacts 95-96
- Break contact, when thermically triggered
- Auxiliary contacts 97-98
- Make contact, when thermically triggered
- Rated operational voltage
- 500 V
- Conventional thermical continuous current Ith
- 6 A
- Rated operational current Ie
- At AC15 up to 240 V 1.5 A
At AC15 up to 440 V 0.7 A
At AC15 up to 500 V 0.5 A - Short-circuit protection gG
- 4 A
Use in series
Versions:
| Art.No. | from/till | Short-circuit protection | Resistance per phase |
Power loss per phase with current set to upper limit | |
|---|---|---|---|---|---|
| gG | S223K | ||||
| 40367048 | 1.0 - 1.4 A | 4 A | 1.6 A | 1120 mΩ | 2.2 W |
| 40367049 | 1.3 - 1.8 A | 6 A | 2 A | 670 mΩ | 2.2 W |
| 40367050 | 1.7 - 2.4A | 6 A | 3 A | 383 mΩ | 2.2 W |
| 40367051 | 2.2 - 3.1A | 10 A | 3 A | 229 mΩ | 2.2 W |
| 40367052 | 2.8 - 4.0 A | 10 A | 4 A | 137 mΩ | 2.2 W |
| 40367053 | 3.5 - 5.0 A | 16 A | 6 A | 87.5 mΩ | 2.2 W |
| 40367054 | 4.5 - 6.5 A | 20 A | 8 A | 51 mΩ | 2.2 W |
| 40367055 | 6.0 - 8.5 A | 25 A | 10 A | 30.4 mΩ | 2.2 W |
| 40367056 | 7.5 - 11 A | 35 A | 16 A | 18.2 mΩ | 2.2 W |
| 40367057 | 10 - 14 A | 35 A | 16 A | 11.2 mΩ | 2.2 W |
| 40367058 | 13 - 19 A | 50 A | 20 A | 6.3 mΩ | 2.3 W |
| 40367060 | 18 - 25 A | 63 A | 25 A | 4.7 mΩ | 2.9 W |
| 40367061 | 24 - 32 A | 80 A | 32 A | 3.2 mΩ | 3.3 W |
Triggering characteristics:
Functional description:
This thermic overload relay monitors the motor coil temperature indirectly via the current in the supply line. A dedicated bi-metal element with heating coil is provided for each conducting line to the motor. When the power consumption of the motor exceed the set limit for a certain period of time, the heat will cause the bi-metal element to change shape. The bi-metal element will then break contact 95-96, thus interrupting the control circuit of the motor. Additional mechanical elements trigger quickly in case of a phase drop-out. With the right type of relay and proper settings the motor will be well protected from overload, failure to start and phase drop-out.
Warning:
Terminal screws which are not sufficiently tightened may cause excessive over-heating. The relays must only be conected by specialists. Do not touch live parts !
Setting to rated current bof the motor:
The relay is set to rated current of the motor by rotating the knob ➀ until setting scale with the desired rated current correspods to the arrowhead ➈.
Changing from manual to automatic reset:
Reset button ➁ in position of arrow:
Aut = automatic reset
Man = manual rest by means of button ➂
Function of the blue button:
Button ➂ in position of arrow:
R = reset only
R O = reset and switching off for special applications, e.g. by motor starters and contactor combinations
By operation of the button ➂ in position of arow R O contact 95-96 closes..
Test before commissioning:
Press reset- and switch off button ➂ for resetting of relay. By pressing the bar ➃ into direction of arrow, the relay trips. Break contact 95-96 pens and make contact 97-98 closes. Red contact position indicator ➉ indicates off position.
Auxiliary contacts:
Break contact 95-96 and make contact 97-98 are galnaically separated. Short circuit protection of the auxiliary contacts: 6 A gl. Signalling units can be operated by the aux. contact 97-98. A sigle-circuit changeover contact can be obtained by bridging terminal 95 and 97.
