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ICS TRIPLEX T8110B processor module

Phi-Comp Input of an angle to compensate c.t. and v.t. errors in the case of highly accurate power measurements. The setting is determined by the difference between c.t. and v.t. errors. NrOfPhases Number of phases measured:
1: single-phase
2: two-phase, i.e. for a three-phase measurement with V connected v.t’s, P = URS  IR  cos   UST  IT  cos  A two-phase power measurement is only possible when connected to delta connected v.t’s.
3: three-phase P = UR  IR  cos  + US  IS  cos  + UT  IT  cos  (The measurement is only correct with delta connected v.t’s if the three phase voltages are symmetrical.) CurrentInp defines the analogue c.t. input channel. All current I/P's may be selected. In the case of multi-phase measurement, the first channel of the group of three selected must be specified. The other phases are derived from the same group. VoltageInp defines the voltage input channel. All voltage I/P's may be selected. In the case of multi-phase measurement, the first channel of the group of three selected must be specified. The other phases are derived from the same group. PN Rated power as given by UN x IN. This enables the amplitude of the power being measured to be compensated, e.g. to the rated power factor of a generator. BlockInp I/P for blocking the function. F: - not blocked T: - blocked xx: - all binary I/P’s (or O/P’s of protection functions)

Determining the settings

 Where the rated currents and possibly also rated voltages of c.t’s, v.t’s and the protected unit differ, it is of advantage to refer the setting to the rated power of the protected unit. This necessitates modifying the sensitivity using the setting for PN.

Characteristic angle The power function is connected to the phase currents and a phase-to-neutral or phase-to-phase voltage. The purpose of the phase compensation is twofold:
to compensate the phase difference between the phase voltage and the any measured phase-to-phase voltage
to determine whether the function responds to active or reactive power. The following table summarises the most important operating modes to simplify setting the corresponding parameters correctly. The angles given apply for connection according to Section 4.4.2. The phase compensation also provides facility for changing the direction of measurement or to compensate incorrect v.t. or c.t. polarity. 4 Settings different applications when measuring phase R current in relation to the phase-to-phase voltage URS