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CI534V02 3BSE010700R1 Control module

Theta-Warn temperature at which an alarm is initiated. Theta-Trip temperature at which a trip is initiated. Temp.-Coeff. temperature coefficient "a" for taking account of the increased resistance of the conductor due to the temperature rise caused by the flow of current. The temperature rise is derived from the dissipated power, which is proportional to the resistance R of the conductor: R = R0 (1 + a
T). where T is the temperature rise referred to the rated value and R0 is the resistance at zero temperature rise, i.e. at room temperature. Normally, a setting of a = 0 models the thermal behaviour sufficiently well.k-Setting factor for extending the time constant when the unit is stationary. The unit is assumed to be at a standstill when a logical "1" is being applied to the binary standstill I/P and a low current is being measured at the same time (less than approx. 0.005 IN in the case of metering c.t. cores or 0.05 IN in the case of protection c.t. cores). NrOfPhases defines the number of phases monitored. CurrentInp defines the current input channel. All current I/P's may be selected. The first channel (R phase) of the group of three selected must be specified in the three-phase mode. IB-Setting Reference (base) current for compensating a difference in relation to IN.

ResponseTime 

Duration of the response impulse. Only effective for a thermal model described by a table. Setting restrictions: not = 0 for a time constant setting = 0 not > 0 for a time constant setting > 0 h [01]  h [40] define a value of the impulse response of the thermal system BlockInp Binary address used as blocking input. (FFALSE, TTRUE, binary input or output of a protection function) Warning Output for signalling an alarm (signal address) Trip Output for signalling tripping (signal address) TimeConstant defines the thermal model for calculating temperature rise. Settings: > 0  1st. order thermal model for which the thermal time constant has to be entered. Settings between 0.1 min and 1.0 min are not permitted. = 0  Thermal model according to table entered.

The overtemperature protection serves to protect a winding against inadmissible temperature rise due to an overcurrent. It is suitable for machines, transformers and lines. The temperature rise of the winding is derived from the current using a thermal image of the protected unit. In contrast to an overload protection function, the overtemperature function can be used for machines of any rating and thermal capacity. It monitors temperature rise and not the absolute temperature of the winding. Thus neither the ambient temperature nor the efficiency of the cooling system bear any influence on protection.