General Dates Table For Current Protection And Wire Sizing - GE Digital Energy LP 33 Installation Manual

Digital Energy™
3.7.4

General dates table for current protection and wire sizing

Fig. 3.7.4-1 Common Input Rectifier & Bypass
The AC values below are current ratings per phase.
These maximum and nominal ratings should be considered when choosing the
NEC (National Electric Code) Section 210-20 a rules must be applied.
DC current rating is the maximum battery discharge current which the UPS allows.
AC Input
UPS Model
LP 33 / 10 kVA 27.8 A
LP 33 / 20 kVA
55.5 A
Size of Branch Circuit Over current Protection - All Models:
"CAUTION - To reduce the risk of fire, only connect UPS to a circuit provided with (see
below) maximum amperes branch circuit over current protection in accordance
with the NEC (National Electric Code), NSI / NFPA 70
AC Input
UPS Model
LP 33 / 10 kVA
LP 33 / 20 kVA
Maximum cable diameter that terminals can accept.
Refer to torque specifications table for torque requirements.
UPS Model Rectifier Input
4 AWG
LP 33 / 10 kVA
LP 33 / 20 kVA 4 AWG
OPM_LPS_3UI_10K_20K_0US_V010.doc
appropriate AC over current protection device.
AC Input Rectifier
F2
F1
Nom.
25.2 A
50.4 A
AC Input Rectifier
F1 F2
35 A 35 A
70 A 70 A
Wire sizing according to NEC Section 210-20 (a)
Use 75°C (167°C) copper wire
Wiring requirements:
AC INPUT: 3-Phase, 4 wire plus Ground
AC OUTPUT: 3-Phase, 4 wire plus Ground
DC INPUT: 3 wire (positive, negative and neutral) plus Ground
Bypass Input
4 AWG
4 AWG
Fig. 3.7.4-2 Separate Input Rectifier & Bypass (option)
AC Input Bypass
F3
Max.
27.4 A 27.8 A
54.8 A 55.5 A
AC Input Bypass
F3
35 A
70 A
DC Input AC Output
4 AWG 4 AWG
4 AWG 4 AWG
Installation Guide LP 33 / 10 - 20 kVA
22/38
g
DC Input
F4
34.3 A
68.6 A
DC Input
F4
50 A
100 A
Table 310-16
GND
4 AWG
4 AWG