Appendix B: HECO
Appendix B-1: Full Frequency Ride-Through Settings for O’ahu, Hawai’i Island, and Maui (HECO A)
Operating Region
Over-Frequency 2
(OFR2)
No Ride
Through
60.1 - 65
60.1 - 65
57 - 59.9
53 - 57
No Ride
Through
0.16 seconds
0.16 seconds
21 seconds20 seconds
20 seconds
Indefinite
Indefinite
21 seconds
Not Applicable
Not Applicable
Not Applicable
Not Applicable
f > 64.0
64.0 ≥ f > 63.0
57.0 > f ≥ 56.0
56.0 > f
63.0 ≥ f > 60.0
60.0 ≥ f ≥ 57.0
Over-Frequency 1
(OFR1)
Normal Operation
High (NORH)
Normal Operation
Low (NORL)
Under-Frequency 1
(UFR1)
Under-Frequency 2
(UFR2)
Permissive Operation
(Freq-Watt)
Mandatory Operation
(Freq-Watt)
Continuous Operation
(Freq-Watt)
Continuous Operation
Mandatory Operation
Permissive Operation
System Frequency
Default Settings (Hz)
Minimum Range
of Adjustability
System Frequency
Default Settings (Hz)
Minimum Range
of Adjustability
Ride-Through
Until
Operating Mode
Maximum Trip
Time
Operating Region
Over-Voltage 2
(OVR2)
No Ride
Through
0.92 seconds
20 seconds
10 - 20*
seconds
0.16**
seconds
110 ≥ V ≥ 88 300 - 600*
300 - 600*
300 - 600*
300 - 600*
300 - 600*
110 ≥ V ≥ 88
110 ≥ V ≥ 88
110 ≥ V ≥ 88
110 ≥ V ≥ 88
Not Applicable
Not Applicable
Not Applicable
Not Applicable
11 - 21*
seconds
1 seconds
21 seconds
Indefinite
Indefinite
Indefinite
Indefinite
V >120
120 ≥ V > 110
88 > V ≥ 70
70 > V ≥ 50
110 ≥ V >100
100 > V ≥ 88
Over-Voltage 1
(OVR1)
Normal Operation
High (NORH)
Normal Operation
Low (NORL)
Under-Voltage 1
(UVR1)
Under-Voltage 2
(UVR2)
Cease to
Energize
Mandatory
Operation
Continuous
Operation
(Volt-Watt)
Continuous
Operation
Mandatory
Operation
Mandatory
Operation
Voltage at Point of
Interconnection
(% Nominal Voltage)
Ride-Through
Until
Operating Mode
Maximum Trip
Time
Return To Service - Trip
% Nominal
Voltage
Time Delay (s)
No Ride
Through
0.5 seconds50 > V
Under-Voltage 3
(UVR3)
Permissive
Operation
Operating Region
Over-Frequency 2
(OFR2)
No Ride
Through
60.1 - 65
60.1 - 65
57 - 59.9
50 - 57
No Ride
Through
0.16 seconds
0.16 seconds
21 seconds20 seconds
20 seconds
Indefinite
Indefinite
21 seconds
Not Applicable
Not Applicable
Not Applicable
Not Applicable
f > 65.0
65.0 ≥ f > 63.0
57.0 > f ≥ 50.0
50.0 > f
63.0 ≥ f > 60.0
60.0 ≥ f ≥ 57.0
Over-Frequency 1
(OFR1)
Normal Operation
High (NORH)
Normal Operation
Low (NORL)
Under-Frequency 1
(UFR1)
Under-Frequency 2
(UFR2)
Permissive Operation
(Freq-Watt)
Mandatory Operation
(Freq-Watt)
Continuous Operation
(Freq-Watt)
Continuous Operation
Mandatory Operation
Permissive Operation
Ride-Through
Until
Operating Mode
Maximum Trip
Time
Appendix B-2: Full Frequency Ride-Through Settings for Moloka’i and Lana’I (HECO B)
Appendix B-3: Full Voltage Ride-through Settings for O’ahu, Hawai’i Island, Maui, Moloka’i, and Lana’i
120
Appendix B: HECO
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