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92 Chapter 5
Planning for Installation and Operation
5.3.5 Input Voltage Tolerances
Table 5.6 lists the input voltage tolerances for the single-phase 9900 subsystem. Transient
voltage conditions must not exceed +15-18% of nominal and must return to a steady-state
tolerance of between +6 and -8% of the normal related voltage in 0.5 seconds or less. Line-
to-line imbalance voltage must not exceed 2.5%. Nonoperating harmonic contents must not
exceed 5%.
Table 5.6 Input Voltage Specifications for Single-Phase Power
Frequency Input Voltages (AC) Wiring Tolerance(%)
60 Hz ±0.5 Hz 200V, 208V or 230V Single-phase two wire + ground +6% or -8%
50 Hz ±0.5 Hz 200V, 220V, 230V or 240V Single-phase two wire + ground +6% or -8%
Note: User input requires a 20-amp circuit breaker for single-phase power.