Vertiv Liebert APM 300, Руководство пользователя

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18 Chapter 3 Electrical Installation
APM 300 Integrated UPS Single Module And Parallel System User Manual
1. Rectifier and bypass input mains current.
2. Non-linear loads (switch mode power supplies) affect the design of the output and bypass neutral cables. The current
circulating in the neutral cable may exceed the nominal phase current. A typical value is 1.732 times the rated current.
3.1.3 Distance From Floor To UPS Connection Point
Table 3-2 provides the distances from the floor to the UPS connection points.
Table 3-2 Distance from floor to UPS connection point
UPS connection point Distance (mm)
Rectifier input 1444
Bypass input 1084
AC output 804
Battery power 842
3.1.4 Notes
The following are guidelines only and superseded by local regulations and codes of practice where applicable:
1. Earth cable: Follow the most direct route possible to connect the earth cable to the cabinet. Size the earth
cable by referring to IEC60950-1 Table 3B and following the local electrical regulations, and in accordance with
the AC supply fault rating, cable lengths and type of protection.
2. In battery cable selection, a maximum voltage drop of 4Vdc is permissible at the current ratings given in
Table 3-1. To minimize the formation of electromagnetic interference, do not form coils.
3. The connection terminals are shown in Figure 3-1 and Figure 3-2.
Warning
Failure to follow adequate earthing procedures may result in EMI or hazards involving electric shock and fire.
3.1.5 Power Cable Connecting Terminals
The rectifier input, bypass, output and battery power cables are connected to the corresponding busbars
situated of the UPS, as shown in Figure 3-1 to Figure 3-2.
3.1.6 Protection Ground
The protective earth cable is reliably connected to the PE input terminal (see Figure 3-2) via the fixing bolt.
All the cabinets and cable troughs shall be grounded according to the local regulations. The grounding wires
shall be tied up reliably to prevent the loosening of the grounding wire tightening screws when the grounding
wires are pulled.
Warning
Failure to follow adequate earthing procedures could result in electric shock hazard to personnel, or the risk of fire,
should an earth fault occur.
3.1.7 External Protective Device
To ensure the safety, it is necessary to install external circuit breaker for the input and battery of the UPS.
Because of the difference of the specific installations, this section only provides general practical information