Service manual

9-2013 4. Service
Tests Measurement Values
L2 to N 0.094 ohms ± 10%
L1 to L2 (Equal to sum of L1 to N and L2 to N) ± 1%
Q1 to Q2 1.11 ohms ± 10%
L1 and N to Q1 and Q2 Infinity
L2 and N to Q1 and Q2 Infinity
L1 to Gnd Infinity
L2 to Gnd Infinity
L1 and N to laminations Infinity
L2 and N to laminations Infinity
Q1-Q2 to laminations Infinity
*If a stator or rotor fails the initial test, repeat the test to check the validity of the initial measurement before replacing
the stator or the rotor.
This generator is rated in accordance with UL 2200 (Stationary Engine Generator Assemblies)
or CSA C22.2 No. 100-04 (Motors and Generators). The maximum continuous current values
that are listed on the generator set nameplate and specification tables occur at the lower limit of
acceptable voltage. Maximum current occurs at 108 and 216 volts. The voltage set point of this
generator set can be adjusted from the operator panel if desired.
The operator panel allows the service voltage to be changed to 7.5% below the nominal 240 volt
set point. The entire 10% voltage adjustment is not allowed by the end user in order to ensure
that the utilization voltage is not too low at the end devices. Additional voltage drop across the
supply conductors may cause rick of damage or improper function of the devices if the voltage
at the genset is set too low.
Derating Guidelines: Maximum wattage or maximum current are subject to and limited by such
factors as fuel Btu content, ambient temperature, altitude, engine power and condition, etc. Full
rated power is available at 60 °F (15.5 °C) at sea level. Derate 3.5% for each 1000 ft (304.8 m)
above sea level and 3% for each 10 °F (5.5 °C) increase in ambient temperature above 60 °F
(15.5 °C).
Example Derate Calculation:
Customer location is at 2000 ft (x m) elevation and the ambient air temperature is 90 °F (x °C).
De-rate for Elevation:
2000 ÷ 1000 = 2
2 x 3.5% = 7% de-rate for elevation
De-rate for Temperature:
90° - 60° = 30°
30° ÷ 10° = 3
3 x 3% = 9% de-rate for temperature
Total De-rate:
9% + 7% = 16% total de-rate %
Amp x (total de-rate ÷ 100) = de-rate in amps
73.2 x (16 ÷ 100) = 11.7 amps
A030A239 (Issue 10) 37