79
EN
SUNSYS PCS2 IM UL Power Conversion System and Storage with Islanding Mode from 33 to 200 kVA - Ref.: IOMSUNPCXX07-EN 01
15.3 RIDE THROUGH MODE & TIMINGS
The L/HVRT (Low and High Voltage Ride-Through) and L/HFRT (Low and High Frequency Ride-Through) define the
behavior of the system in response to low and high voltage and frequency excursions outside the normal range of
operation of the PCS.
The following pictures report an example of ride-through profiles that correspond to Rule 21 prescriptions.
Figure SA9.1
Example operating parameters that correspond to Rule 21 ride-through and must trip regions in
the time-voltage domain
Table SA9.1
Example operating parameters that correspond to Rule 21 L/HVRT
a
Region
Voltage (% Nominal
Voltage)
Ride-Through Until
Operating Mode
Maximum Trip Time
(s)
High Voltage 2 (HV2)
V
≥
120
Not Applicable
Not Applicable
0.16 s
High Voltage 1 (HV1)
110 < V < 120
12 s
Momentary Cessation
13 s
Near Nominal (NN)
88
≤
V
≤
110
,QGH¿QLW
e
Continuous Operation
Not Applicable
Low Voltage 1 (LV1)
70
≤
V < 88
20 s
Mandatory Operation
21 s
Low Voltage 2 (LV2)
50
≤
V < 70
10 s
Mandatory Operation
11 s
Low Voltage 3 (LV3)
V < 50
1 s
Momentary Cessation
1.5 s
a
While these operating parameters correspond to the Rule 21 parameters, they may be substituted with operating parameters
for other area EPS requirements.
Note 1: Manufacturer may evaluate product over wider ranges of adjustment than those within the table.
Note 2: The table voltage could be either at the PCC or equipment terminals.
Note 3: For LV3 or HV1 the EUT shall cease to energize in not more than 0.16 s (and not trip). This may differ in other SRD(s).
