990-91318C-001

Specifications

Specifications for 20 kW UPS with Input Isolation Transformer and Internal Batteries

The UPS includes an input isolation transformer of 480 V In, 400 V Out. The UPS is designed for a continuous 20 kW load (transformer sized at 20 kW) and supports short-term peak loads up to 80 kW. The UPS protects medical equipment (e.g. X-ray, scanners) or other load equipment with similar short-time peak consumption.
Input 480 V Connections 3-wire (L1, L2, L3, G)
Input voltage range (V) 432-528
Frequency (Hz) 60
Nominal input current (A) 29
Maximum input current (A) 34
Input current limitation (A) 80
Total harmonic distortion (THDI) <6% at 100% load
Input power factor 0.99 at 100% load
Protection Built-in backfeed protection and fuses
Maximum short circuit rating 20 kA RMS
Ramp-in Programmable and adaptive 1-40 seconds
Output 400 V Connections 4-wire (L1, L2, L3, N, G)
Output voltage regulation Symmetrical load ±1%
Asymmetrical load ±3%
Overload capacity 20 kW load: continuous in normal operation and battery operation
NOTE: Overload capacities above 20 kW are given with load switching between 100 milliseconds ON and 200 milliseconds OFF.

30 kW load: 120 minutes in normal operation
40 kW load: 60 minutes in normal operation
50 kW load: 45 minutes in normal operation
60 kW load: 30 minutes in normal operation
70 kW load: 20 minutes in normal operation
80 kW load: 5 minutes in normal operation
Dynamic load response ± 5%
Output power factor 1
Nominal output current (A) 29
Output frequency (Hz) 60 Hz bypass synchronized – 60 Hz ±0.1% free-running
Synchronized slew rate (Hz/sec) Programmable to 0.25, 0.5, 1, 2, 4, 6
Total harmonic distortion (THDU) <1% for linear load
<5% for non-linear load
Load crest factor 2.5
Load power factor 0.7 leading to 0.7 lagging
Battery 400 V Charging power in % of output power at 0-40% load 80%
Charging power in % of output power at 100% load 20%
Maximum charging power (at 0-40% load) (kW) 16
Maximum charging power (at 100% load) (kW) 4
Nominal battery voltage (VDC) 480
Nominal float voltage (VDC) 545
Maximum boost voltage (VDC) 572
Temperature compensation (per cell) -3.3mV/°C, for T ≥ 25 °C – 0mV/°C, for T < 25 °C
End of discharge voltage (full load) (VDC) 384
Battery current at full load and nominal battery voltage (A) 43
Battery current at full load and minimum battery voltage (A) 54
Ripple current < 5% C20 (5-minute runtime)
Battery test Manual/automatic (selectable)
Maximum short circuit rating 10 kA

Recommended Cable Sizes

DANGER
hazard of electric shock, explosion, or arc flash
All wiring must comply with all applicable national and/or electrical codes. The maximum allowable cable size is 3 AWG.
Failure to follow these instructions will result in death or serious injury.

Cable sizes in this manual are based on Table 310.15 (B)(16) of the National Electrical Code (NEC) with the following assertions:

  • 90 °C (194 °F) conductors (75 °C (167 °F) termination)

  • An ambient temperature of 30 °C (86 °F)

  • Use of copper conductors

  • Installation method C

If the ambient temperature is greater than 30 °C (86 °F), larger conductors are to be selected in accordance with the correction factors of the NEC.

Equipment grounding conductors are sized in accordance with NEC Article 250.122 and Table 250.122.

Input/output phases 3 AWG
Input/output EGC 3 AWG
Neutral 3 AWG

Recommended Bolt and Lug Sizes

Cable size Bolt size Cable lug type Crimping tool Die
3 AWG M8 YA3CLD MD7-34R W3CRT

Recommended Upstream Protection

CAUTION
hazard of fire
  • Connect only to a circuit with the below specifications.
  • Connect to a circuit provided with a 100 A branch circuit overcurrent protection maximum in accordance with the National Electrical Code, ANSI/NFPA70, and the Canadian Electrical Code, Part I, C22.1.
Failure to follow these instructions can result in injury or equipment damage.
NOTE: Overcurrent protection is to be provided by others and marked with its function.
UPS rating 20 kW
Breaker type HJF36100U31X
Ir setting 80
Tr at 6 Ir setting 0.5
li (x In) setting 2

Torque Specifications

Bolt size Torque
M4 1.7 Nm (1.25 lb-ft / 15 lb-in)
M5 2.2 Nm (1.62 lb-ft / 19.5 lb-in)
M6 5 Nm (3.69 lb-ft / 44.3 lb-in)
M8 17.5 Nm (12.91 lb-ft / 154.9 lb-in)
M10 30 Nm (22 lb-ft / 194.7 lb-in)
M12 50 Nm (36.87 lb-ft / 442.5 lb-in)

Environment

  Operating Storage
Temperature 0 °C to 40 °C (32 °F to 104 °F)

-15 °C to 40 °C (5 °F to 104 °F) for systems with batteries.

Relative humidity 0 - 95% non-condensing 10 - 80% non-condensing
Elevation Designed for operation in 0-3000 m (0-10000 feet) elevation.
Power derating required from 1000-3000 m (3300-10000 feet):
Up to 1000 m (3300 feet): 1.000
Up to 1500 m (5000 feet): 0.975
Up to 2000 m (6600 feet): 0.950
Up to 2500 m (8300 feet): 0.925
Up to 3000 m (10000 feet): 0.900
 
Audible noise one meter (three feet) from unit 57 dB at 70% load, 65 dB at 100% load
Protection class IP20
Color RAL 9003, gloss level 85%

Heat Dissipation in BTU/hr

20 kW Normal operation Battery operation
25% load <3000 1405
50% load <3000 1836
75% load <3000 2267
100% load <3000 2697

UPS Shipping Weights and Dimensions

UPS rating Weight kg (lbs) Height mm (in) Width mm (in) Depth mm (in)
20 kW UPS with input isolation transformer and three battery strings

902 (1989)

2082 (81.96)

755 (29.72)

1010 (39.76)

Modular Battery Shipping Weights and Dimensions

Commercial reference Weight kg (lbs) Height mm (in) Width mm (in) Depth mm (in)
GVSBTHULL 33 (73) 180 (7.08) 150 (5.90) 800 (31.49)

UPS Weights and Dimensions

UPS rating Weight kg (lbs) Height mm (in) Width mm (in) Depth mm (in)
20 kW UPS with input isolation transformer and three battery strings

877 (1933)

1970 (77.56)

550 (21.65)

847 (33.35)

NOTE: One battery module weighs approximately 32 kg (70.5 lbs).

Clearance

Required Ventilation Clearance

Recommended Installation and Service Clearance

NOTE: These clearance dimensions are published for airflow only. Consult with the local safety codes and standards for additional requirements in your local area.
NOTE: These clearance dimensions are published for installation and service access only. Consult with the local safety codes and standards for additional requirements in your local area.
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