The thermal overload relays are three pole relays with bimetal tripping elements. 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 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).
TA thermal overload relays are used with A Line contactors for the protection of motors having a nominal voltage of up to 600V AC max per L/CSA (690V AC and 800V DC per IEC).
- 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
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 startes
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
CSA File No: LR98336
Remote trip and reset option available
Single phase and phaalance protection
Isolated alarm circuit (N.O.) contact
Ambient compensation: -25C to +55C (-13F to +131F)
Manual or automatic reset
Factory calibrated and tested
Wide adjustment range
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