990-91284-001

Specifications for Maintenance Bypass Cabinet with Output Transformer GVSBPOT50B

UPS rating

20 kW 30 kW 40 kW 50 kW

Input voltage (V)

480

Input connections

3-wire (L1, L2, L3, PE)

Nominal input current (A)

25 37 50 62

Maximum input current (A)

30 45 60 74

Output connections

4-wire (L1, L2, L3, N, PE)

Output voltage (V)

208

Output current (A)

56 83 111 139

Frequency (Hz)

60

Circuit breaker interrupting ratings (kA)

65 kA at 480 V

Trip Settings for Maintenance Bypass Cabinet with Output Transformer GVSBPOT50B

UPS rating

Breaker type

Ir (A)

tr @ 6 Ir (A)

li (A)

UIB/MBB/UOB UIB MBB/UOB UIB MBB/UOB UIB/MBB/UOB
20 kW HJF36150CU31X 50 50 0.5 2 6
30 kW HJF36150CU31X 60 50 0.5 2 6
40 kW HJF36150CU31X 80 60 0.5 4 6
50 kW HJF36150CU31X 90 70 0.5 4 6

Recommended Upstream Protection for Maintenance Bypass Cabinet with Output Transformer GVSBPOT50B

UPS rating

Input breaker type

Ir (A)

tr @ 6 Ir (A)

li (A)

20 kW HJL36060U31X 30 4 10
30 kW HJL36060U31X 50 4 10
40 kW HJL36100U31X 60 4 6
50 kW HJL36100U31X 80 4 6

Recommended Cable Sizes for Maintenance Bypass Cabinet with Output Transformer GVSBPOT50B

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 3/0 AWG.
Failure to follow these instructions will result in death or serious injury.
NOTE: Overcurrent protection and cable lugs are to be provided by others.

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 or aluminum conductors

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/Protective Earth (PE in this manual) are sized in accordance with NEC Article 250.122 and Table 250.122.

Copper

20 kW 30 kW 40 kW 50 kW

Input phases (AWG)

8 6 4 3

Input PE (AWG)

10 10 8 8

Output phases (AWG)

6 3 1 1/0

Output PE (AWG)

10 8 6 6

Neutral* (AWG)

3 1/0 3/0 2 x 1

DC+/DC- (AWG)

4 3 1/0 1/0

DC PE (AWG)

8 6 6 6

Aluminum

20 kW 30 kW 40 kW 50 kW

Input phases (AWG)

6 4 2 2

Input PE (AWG)

8 8 6 6

Output phases (AWG)

4 2 3/0 3/0

Output PE (AWG)

8 6 4 4

Neutral* (AWG)

1 3/0 2 x 1/0 2 x 2/0

DC+/DC- (AWG)

3 1 2/0 2/0

DC PE (AWG)

6 4 4 4
NOTE: DC cables are only connected in the maintenance bypass cabinet in top cable entry systems for a UPS without conduit box. In all others the DC cables are connected directly in the UPS.
NOTE: The DC cable sizes given here are recommendations – Always follow the specific instructions in the battery solution documentation for DC+/DC- and DC PE cable sizes and ensure that the DC cable sizes match the battery breaker rating.
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