45
7
PCS Functions
7.1
L/HVRT(UL)
The Electric Rule 21, 2015 defines the L/HVRT requirements according to the figure and
table below.
F
Fiig
gu
urre
e 7
7--1
1 Low / High voltage withstand requirements
For mandatory operation regions, the PCS shall be considered in compliance if it
provides an average current greater than or equal to 80% of the pre-disturbance
current or other percentage defined in the requirements documents during the ride-
through event in each of the voltage ranges specified in the SRD (s), and returns to at
least 80% of the pre-disturbance current level within the time specified in the local
standards or regulations.
For momentary cessation regions, the PCS shall be considered in compliance if it
provides an average active current less than or equal to 10% of the PCS rated current
during the ride-through event in each of the voltage ranges specified in the SRD(s), and
returns to the pre-disturbance current level or percentage as defined in the
requirements document within the time specified in the local standards or regulations.
