Digital Equipment HA3000, Installation Manual

Page: 66 / 96

4–26 INSTALLATION
4.5.1 Power Cable Connections
The UPS CSA Cabinet comes in two separate versions: a cabinet with an isolation/step-
down transformer (600 Vac to 208 Vac) and a CSA assembly, and a cabinet with a CSA
assembly. Each of these versions has its own connection procedure.
4.5.1.1 Connecting the HA33D with Input Isolation/Step-Down Transformer and CSA
Assembly
The connections to be made are the three-phase, three wires plus equipment ground. The
phase rotation must be A, B, C. Refer to Table B–9 for the input circuit breaker rating.
Size the main input cables and upstream protection devices accordingly.
Table 4–9 HA33D/F UPS CSA Cabinet Electrical Specifications
Model
Number
Output
Rating
(kVA)
Input
Voltage
(Vac)
Output
Voltage
(Vac)
Input CB
Rating
(Amps)
With Input Isolation/Step-Down Transformer and CSA Assembly
HA33D-EH 20 600 208 40
HA33D-EK 40 600 208 60
HA33D-EM 60 600 208 80
HA33D-EN 80 600 208 100
With CSA Assembly Only
HA33F-PH 20 NA NA NA
HA33F-PK 40 NA NA NA
HA33F-PM 60 NA NA NA
HA33F-PN 80 NA NA NA
NOTES:
1. NA = Not Applicable
2. The CSA assembly is not voltage dependent.
3. The UPS CSA Cabinet models with an Input Isolation/Step-Down Transformer (HA33D) contain an input
circuit breaker (CB1).
Field wiring connections are made on the line side of the circuit breaker CB1
(Figure 4–17). To gain access to this area, the door of the UPS CSA Cabinet must be
unlocked and opened, and the upper inside cover panel must be removed.
Connect the incoming A cable to the left side terminal of the circuit breaker. Connect
the incoming B cable to the middle terminal of the circuit breaker. Connect the
incoming C cable to the right side terminal of the circuit breaker. Connect the ground
cable to the ground busbar. The cables connecting the input circuit breaker to the
isolation/step-down transformer and connecting the transformer to contactor K2 are
factory installed.