JOHNSON CONTROLS
106
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
MESSAGE DESCRIPTION
Harmonic Filter – High
Total Demand
Distortion
The control center determines this shutdown by using data supplied from the harmonic lter logic
board. This shutdown indicates that the lter is not operating correctly or the input current to
the drive/lter system is not sinusoidal. This shutdown will occur if the Total Demand Distortion
(TDD) in any one phase exceeds 25% continuously for 45 seconds. TDD is an acronym for Total
Demand Distortion, a term dened by the IEEE Std 519-1992 standard as “the total root - sum
- square harmonic current distortion, in percent of the maximum demand load current (15 or 30
min demand)”. .
TABLE 12 - SAFETY SHUTDOWN MESSAGES (CONT'D)
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