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2.1.2 LISTINGS / COMPLIANCE
The system shall be listed to UL/cUL standards UL1012 or ESA approved
The system shall comply to: FCC Article 15, Section J, Class A and
ANSI C62.14 (electromagnetic compatibility)
3.0 DYNAMIC ELECTRICAL CHARACTERISTICS
3.1 OPERATING VOLTAGE
The input voltage shall be 208 VAC, 240 VAC, 480 VAC or 600 VAC input, three phase 60 Hz. The
output shall be a WYE derived 7 tap regulating system at 480/277VAC, rated for 60 KVA intermittent
load and 30 KVA continuous load. The standard transformer design shall be capable of accepting
three (3) input voltages, 208 VAC, 240 VAC or 480 VAC. Each unit will be pre-wired at the factory
to accommodate the alternative nominal input voltage. The input voltage and input breaker can be
changed in the field to accommodate an alternative input voltage.
3.2 LINE VOLTAGE REGULATION
Usable Input Line V15 %, -23 %.
Output Line Voltage ±2.0 % typical.
The design of the system shall indicate that with an input voltage of -10 % of nominal, increasing the
load to 1000 % shall cause the output voltage to fall no lower than -6 %.
3.3 OUTPUT VOLTAGE
Output voltage shall be 480/277 VAC derived from a WYE configuration.
3.4 OUTPUT CONNECTIONS
An output terminal strip is provided for the 480/277 VAC three phase power.
3.5 INPUT/OUTPUT WIRING
The Allen Bradley 1492-CE 2 terminals allow wire sizes from # 12 to # 1/0 to be connected to the input
and output terminals. The ILSCO TA-2/0 terminal allows wire sizes from # 14 to #2/0 to be connected
to the ground.
3.6 RESPONSE TIME
Response time is less than 1/2 cycle.
3.7 CORRECTION TIME
The output voltage is corrected within 1 cycle.
3.8 LOAD REGULATION
The output is maintained to within 2 % of nominal or less, from no load to full load.
3.9 IMPEDANCE
Output impedance shall be less than 2 %.
