American Power Conversion 20-30 kVA 480V Specifications, Checklist, Contact Information

6 Specifications

UPS ratings	20 kVA	30 kVA
Input voltage / Bypass voltage (V) per phase	480	480
Input current (nominal) (A)	25.5	36.8
Input frequency (Hz) range	60	60
Output voltage (on line) (Vac)	3x208/120	3x208/120
Minimum and maximum values(± 1%)
Output current (nominal, per phase) (A)	55.5	83.3
Maximum output current (in bypass only at	61.1	91.6
110% overload per phase)
Neutral output current	37.5	56.7
(with 100% switch mode load) (A)

Minimum breaker settings

			150%	125%
		800%	overload	overload
		overload	normal/	normal/
	Internal	bypass	battery	battery	Conti-
20kVA	fault	operation	operation	operation	nuously
Mains input	4 kA	–	–	–	68 A
Bypass input	2.3 kA	444 A	–	–	62 A
Duration	<10 ms	500 ms	30 s	60 s	∞
Notes	1
			150%	125%
		800%	overload	overload
		overload	normal/	normal/
	Internal	bypass	battery	battery	Conti-
30kVA	fault	operation	operation	operation	nuously
Mains input	5 kA	–	–	–	102 A
Bypass input	4.2 kA	444 A	–	–	92 A
Duration	<10 ms	500 ms	30 s	60 s	∞
Notes	1

Note 1: the short-circuit level is indicated for the output value.

Recommended phase-conductor sizes [AWG] for a 86°F (30°C) temperature environment

UPS/AWG	AC	AC	DC input
sizes	input [AWG]	output [AWG]	[AWG], 75ºC Wire
20 kVA	6	4	4
30 kVA	4	1	1

Use Molex lug type or equivalent, and crimp to manufacturer’s specifications.

Note

Cable Size	Cable Lug	Crimping	Die	Terminal Bolt
[AWG]	Type	Tool		Diameter
6	YA6CL2TC38	MD7-34R	W5CVT	0.2 in/6 mm
4	YA4CL2TC38	MD7-34R	W4CVT	0.2 in/6 mm
1	YA1CL2TC38	MD7-34R	W1CVT	0.2 in/6 mm

At 100% non-linear load (EN50091-3 standard), the neutral shall be rated for 173% phase current.

Warning

Recommended current protection

To ensure the correct functionality of the PDU and to avoid unintentional tripping of the bypass input protection device follow the following recommendation:

Use the SUVTOPT114 (20 kVA version) or the SUVT115 (30 kVA version) as input protection.

Output protection is included in the PDU of the unit.

Note: Using a solution solely based on breakers, selectivity for load short circuit currents higher than 2 kA cannot be assured for the 3-phased output. If this is required, use fuses to protect the bypass.

UPS size	Fuse type
20 kVA version 480 V input voltage	40 A Class J time delay fuse
30 kVA version 480 V input voltage	50 A Class J time delay fuse

If fuses are preferred, the following can be used:

UPS size	Breaker/fuse
20 kVA version 480 V input voltage	40 A
30 kVA version 480 V input voltage	50 A

Ensure that the short-circuit current on the UPS input is less than 14 kAiC sym RMS. Also take into consideration the below breaker settings to ensure correct functionality during overload operation.

Breakers/fuses other than APC SUVTOPT need complete selectivity assessments.

Note

7 Checklist

• Do not apply electricity to the UPS.

• Do not connect batteries in the UPS.

• If an XR Battery Enclosure is installed make sure that the DC breaker (if available) is in the OFF position and that both 125A fuses are removed from the XR Battery Enclosure.

• Check that the power wiring is torqued to 62 lbf.in/7 Nm.

• Verify clockwise phase-rotation (L1, L2, L3) and make sure a neutral connection is present.

• If the installation includes an XR Battery Enclosure, remount the 125A fuses in the XR Battery Enclosure and check that the DC breaker (if available) on the XR Battery Enclosure is in the ON position.

• Leave a wiring diagram on site for service personnel.

• Close the rear door.

• For any optional equipment, refer to product-specific manuals.

8 Contact Information

If a problem occurs, phone Customer Support at (1) (800) 800-4272 (US and Canada). For country-specific centers: go to www.apc.com/support/ contact. Web Support: write to support@apc.com

Smart-UPS® VT ISX w/transformer and PDU, 20-30 kVA, 480 V, Installation Smart-UPS® VT ISX w/transformer and PDU, 20-30 kVA, 480 V, Installation