American Power Conversion SYMSTRF-PD Input Wiring Specifications, Voltage Jumper Procedure

Chapter 4 - Electrical Requirements and Procedures

Input Wiring Input Wiring Procedures

νVerify that all incoming line voltage (utility power) and low voltage (control) circuits are de-energized, and locked out before installing cables or making connec- tions, whether in the junction box or to the SymmetraTM Power Array.

νAlways verify that all battery modules are removed and all battery extension frames are disconnected from the Power Array before installing any wiring to the Power Array.

νRead this chapter completely before installing any wir- ing to the Power Array.

Input Wiring Specifications

The Power Array requires either a single phase 208V, 50/60Hz, or a 240V, 50/60Hz incoming utility power source. A 3-con- ductor cable (2 live, 1 ground) is to be brought to the input wiring terminal block inside an adequate length of flexible metal conduit. To minimize disturbances caused by other loads in the building, input wiring should be supplied di- rectly from the service entrance (a dedicated power feeder). All electrical service, both input and output, must be sized in accordance with the NEC and any local building codes. The circuit for input power must be adequate to carry the full load of the system and the load equipment. The 3-conduc- tor input cable should be sized for no more than 3% voltage drop. A 3/4” knockout in the input wiring access panel pro- vides access to the terminal block.

See table 4-1 for input wiring specifications.

An input voltage jumper must be manually set before input wiring can be installed. Follow the procedure below:

Voltage Jumper Procedure

1.Refer to figure 4-1. Remove the screw that secures the voltage select access panel to the frame. Place the screw and access panel aside temporarily.

Fig 4-1Voltage Select Access Panel

2.Use a small, flat head screwdriver to position the input voltage jumper to the correct voltage setting. See figure 4-2. Do not overtighten screws.

Note: When the input voltage jumper is in the 240V position, the jumper bar activates a micro switch at the top of the termi- nal block. In the 208V position, the micro switch is not acti- vated.

Input	Frame	Input Full	Input	Minimum	Minimum
Voltage	Size		Overcurrent
		Load		Input Wire	Ground Wire
(2-wire plus	(Max. kVA		Protection
		Amperage		Gauge	Gauge
ground)	Rating)		(External)
208Vac	Mini (8kVA)	40 Amp	50 Amp	#8 Gauge	#8 Gauge
	Master (16kVA)	80 Amp	100 Amp	#3 Gauge	#3 Gauge
240Vac	Mini (8kVA)	35 Amp	50 Amp	#8 Gauge	#8 Gauge
	Master (16kVA)	70 Amp	100 Amp	#3 Gauge	#3 Gauge

Table 4-1Input Wiring Specifications

4-2