One Cycle Protection - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Numbers within square brackets show the parameter ID for the corresponding function.
Figure 7-15 Input Side Monitoring
Table 7-2 Symbols used in Figure Input Side Monitoring
Name Description
E Average rms voltage (of all three phases)
rms
E Amplitude of voltage taking the transformer tap setting into account. This represents the actual voltage
d
being provided to the cells. If the tap setting is +5%, E
E Zero sequence (DC offset) corrected input phase voltages
a,b,c
ω Input frequency
u
θ Angle of input-side flux
u
I Average rms current (of all three phases)
rms
I Real component of input current
d
I Reactive component of input current
q
I Single-phase components of input current
a,b,c
7.9.2

One Cycle Protection

One cycle protection is also referred to as excessive input reactive current detection.
NXGPro+ Control Manual
Operating Manual, A5E50491925A
Operating the Control
7.9 Input Side Monitoring and Protection
will be 5% smaller than E
d
, and vice versa.
rms
203