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Thermal overload relay TA25DU-V1000
According to IEC/EN 60947-1/-4-1/-5-1 for low-voltage switchgear,
Directive 94/9/EC for explosion-protected areas,
EN 60079-14 for electrical equipment for gas explosion endangered areas
General description
The thermal overload relay TA25DU-V1000 is offered in 18 different current ranges: 0.10 - 32 A.
The tripping function is ensured by 3 current-dependent, delayed overload triggers on bimetal basis.
The thermal overload relay can be set to the consumer rated current by a adjustment knob on the front.
The reset after a release is selectable between hand (Man) and automatic reset (Aut). The manual control reset button can
also be used to turn off.
The settings R and RO can be selected:
R
RO
Safety note:
The device may only be operated with setting manual reset in applications for the protection of motors in the
Ex e range, since the motor can restart automatically after a release in the setting automatic reset and thus
cause damages to persons or property.
Transport, storage
•
ABB overload relays are accordingly packed ex factory for the in each case agreed upon transport mode.
•
Avoid blows and impacts.
•
Pay attention to possible damage of the packing or of the device.
•
Store the device dry and weather-protected.
•
Protect the device against dirt.
Installation
Mounting, electrical connection and start-up are only to be done by trained technical personnel. Adhere to the unit-referred
conditions and specifications of the manufacturer. In the case of violation the protection of the explosion proof motor/
consumer is no longer upright.
Devices of the series TA25DU are suitable for attachment to ABB contactors A9 ... A40, und (T)AL9...(T)AL40.
Detailed information on the individual combinations can be found in the co-ordination tables. These are available on the
Internet. To connect insert the angle brackets into the contactor clips, hook up the plastic hooks and tighten the locking
screws.
Test before commissioning
Press reset – and switch off button for resetting of relay.
By pressing the test release slide, the device trips.
The contact 95-96 opens, the contact 97-98 closes.
Red contact position indicator indicates off position.
Check whether coils circuit of the load contactor matches help contact specificfiction of TA25DU-V1000.
Operation
•
Setting of the motor rated current on the front adjustment knob. Adjust the desired rated current value on the head of the
arrow.
•
The tripping period at the coordinate points I
of the motor. Whether this requirement is fulfi lled, must be examined using the tripping characteristic. The appropriate
tripping characteristics are contained in this documentation. They can also be requested from the manufacturer.
•
Motors for heavy starting (ramp-up time > 1,7 x t
Design Test Certifi cate for Ex e motors by start up monitoring.
•
All three main current paths must be fl owed through by current, in order to achieve the indicated equipment
characteristics. Operate only in closed areas without less favourable operating conditions (e. g. dust, corrosive steams,
damaging gases).
•
Suitable encapsulations are to be foreseen in dusty and damp rooms.
•
In the case of Ex-applications proof of the effectiveness of the installed protection devices is required before start-up!
•
Safe condition if NC contact 95-96 (normaly closed) is opened.
Device must be replaced in case of failure. Repair of TA25DU-V1000 is not permitted.
When selecting the overload relay, the suitability is to be examined with reference to the tripping characteristics.
The values for the ratio starting current I
PTB certificate of conformity or in the EEC - design certificate and on the name plate of the motor.
The relay must trip within the t
point I
/I
and the t
- time.
A
N
E
Only reset
Reset and turning off in special operation situations,
e. g. with a motor starter and contactor combination, test function circuit
to rated current I
A
- time, i. e. the tripping characteristic from the cold condition must be below the coordinate
E
/I
(motor starting current ratio) must be smaller than heating up period t
A
N
–time) are to be protected according to the specifi cations of the EEC
E
and the shortest t
N
- time, which must be noted in the
E
2CDC106001M5703 / 10.2013 - 9
E
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