f.
Volatile Organic Compounds
[_____] Lbs/Hr kg/Hr
g.
Visible Emissions
[_____] percent opacity
]2.1.1.3
Performance Class
**************************************************************************
NOTE: See the following guidelines and table for
selecting the appropriate performance class:
1. Select Class G1 where the connected loads are
such that only basic parameters of voltage and
frequency are needed, e.g., general purpose lighting
and other simple electrical loads.
2. Select Class G2 where the demands on voltage
characteristics are very much the same as for the
commercial power system, e.g., lighting systems,
pumps, fans, hoists.
3. Select Class G3 where the connected equipment
may make severe demands on frequency, voltage, and
waveform characteristics, e.g., telecommunications
as thyristor-controlled loads.
4. Select Class G4 where the demands on the
frequency, voltage, and waveform characteristics are
exceptionally severe, e.g., data processing
equipment or computer systems. Performance values
for Class G4 shall be determined by the designer and
an appropriate table similar to the following table
must be inserted into the Specification.
Parameter
Performance Class
G1
G2
G3
100 Percent Load Increase Frequency
Deviation (Percent)
<-15
<-10
<-7
100 Percent Load Decrease Frequency
Deviation (Percent)
<+18
<+12
<+10
100 Percent Load Change Frequency
Recovery Time (Seconds)
<10
<5
<3
100 Percent Load Increase Voltage
Deviation (Percent)
<-25
<-20
<-15
100 Percent Load Decrease Voltage
Deviation (Percent)
<+35
<+25
<+20
100 Percent Load Change Voltage
Recovery Time (Seconds)
<10
<6
<4
Frequency Droop
(Percent)
<-8
<-5
<-3
Steady-State Frequency
SECTION 16237N
Page 18
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