31/54
MegaFlex 1000 to 1600
UPS Installation Guide / REV-A
Fig. 4.8.5-3 Dual Input Utility Rectifier & Bypass
Fig. 4.8.5-4 Common Input Utility Rectifier & Bypass
Size of Branch Circuit Over Current Protection:
Every power line must be singularly protected by UL 489 overcurrent protective devices (provided by others)
according to the ampacity table below.
Non-standard Circuit Breakers shall be restricted to access, in accordance with NEC 240.6(c).
Maximum input short circuit current at CB1 and CB2 is 100 kArms.
UPS rating
CB1 - AC Input Rectifier
CB2 - AC Input Bypass
CB3 - AC Input
CB4 - DC Input
100% Rated
100% Rated
100% Rated
100% Rated
MegaFlex 1000
1400 A
1400 A
1400 A
3000 A
MegaFlex 1100
1600 A
1400 A
1600 A
3000 A
MegaFlex 1200
2000 A
1600 A
2000 A
3000 A
MegaFlex 1500
2500 A
2000 A
2500 A
4000 A
MegaFlex 1600
2500 A
2000 A
2500 A
4000 A
Wiring!
Wire sizing according to NEC for 167°F (75°C) copper or aluminum wire at 104°F (40°C).
Wiring requirements:
Rectifier AC input/Bypass AC input / AC
output ports.
3-phase, 3-wire plus ground (each conduit shall
contain one cable per circuit’s phase and one
ground cable).
DC Input.
2 poles (positive and negative) plus ground
(each conduit shall contain one positive, one
negative and one ground cable).
Maximum recommended cable size (type THWN/THHN copper, 167°F/75°C) * per phase/pole and ground
conductors.
Each conduit shall terminate its ground conductor to UPS ground bus bar. Wires shall be rated 600V.
Conduits (provided by others) must be installed between UPS and the power source.
UPS rating
AC Input Rectifier (C)
AC Input Bypass (B)
AC Output (D)
DC Input (K)
MegaFlex 1000
6x500 + AWG 4/0
6x500 kcmil + AWG 4/0 6x500 kcmil + AWG 4/0 8x600 + 250 kcmil
MegaFlex 1100
8x500 kcmil + AWG 4/0 6x500 kcmil + AWG 4/0 8x500 kcmil + AWG 4/0 8x600 + 250 kcmil
MegaFlex 1200
8x500 + 250 kcmil
8x500 kcmil + AWG 4/0
8x500 kcmil + AWG 4/0
8x600 + 250 kcmil
MegaFlex 1500
MegaFlex 1600
350 kcmil
8x500 + 250 kcmil
8x500 + 50 kcmil
50 kcmil
*) for AA-8000 Aluminum cables contact ABB Service Center.
Recommended two-hole cable lugs:
Cable Size
T&B Copper / Two holes
T&B Aluminum / Two holes
500 kcmil
TnB 54223
-
750 kcmil
-
TnB 60278NT
