American Power Conversion SYMINIF-PD, SYMSTRF-PD user manual Output Wiring Configurations

Chapter 4 - Electrical Requirements and Procedures

Output Wiring

Output voltage is delivered to the load equipment via hardwired connections and/or via receptacles on an optional power distribution unit (PDU). To facilitate maintenance and service of the Power Array, it is recomended that flexible metal conduit be used for all hardwiring connections.

See table 4-2 for output wiring specifications.

Output Wiring Configurations

The Power Array is typically wired to deliver either120V/240V, or 120V/208V/240V output voltages. The internal wiring to the output terminal block is depicted in figure 4-6. Note the neutral ground bond in figure 4-7. Wiring configurations for installations with a power panel are provided in figures 4-8 and 4-9. If wiring is to be connected directly to the load equipment, refer to table 4-3 for the correct terminal con- nections.

Note: Use only the connections shown in table 4-3. All others will yield voltages other than normal utility voltages.

Voltage	Connections*
120V	2-8 or 6-8
240V	2-6
208V	4-6

*Use only these connections. All other combinations will yield voltages other than normal utility voltages.

Table 4-3Terminal Block Voltage Combinations

Fig 4-6Voltages Delivered to the Output Terminal Block

Neutral

Ground

Bond

.

Fig 4-7Output Wiring Neutral Ground Bond

Output Overcurrent Protection

SymmetraTM requires output voltage overcurrent protection in accordance with the ratings in table 4-2. If an optional PDU is installed on the Power Array, the panel circuit breaker acts as the overcurrent protection for the PDU receptacles and the hardwired connections. See figure 4-11 and 4-12. If a PDU panel is not installed, circuit breakers must be installed in the power panels as shown in figures 4-8 and 4-9.

Output	Frame	Maximum	Output		Minimum	Minimum
	Size		Overcurrent		Output	Ground
Voltage		Output Per
	(Max. kVA		Protection		Wire	Wire
		Conductor
	Rating)		(External)		Gauge	Gauge
120/240Vac	Mini (8kVA)	40 Amp	50 Amp (2-pole)		#8 Gauge	#8 Gauge
(2-wires + ground)	Master (16kVA)	80 Amp	90 Amp	(2-pole)	#3 Gauge	#3 Gauge
120/208/240Vac	Mini (8kVA)	40 Amp	50 Amp	(3-pole)	#8 Gauge	#8 Gauge
(3-wires + ground)	Master (16kVA)	80 Amp	90 Amp	(3-pole)	#3 Gauge	#3 Gauge

Table 4-2Output Wiring Specifications

4-4