Eaton 93PS-8(20)-20(-C)

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- the maintenance bypass and the UPS, or

- the maintenance bypass and the rectifier input breaker.

If a bypass input breaker is installed in the maintenance bypass and a single-

feed UPS is being installed., a single feed to the maintenance bypass is

acceptable for supplying both the UPS and the bypass.

An additional single feed kit (P-103002165 KIT 93PS-20 SINGLE FEED) is

available for the 8–20 kW cabinet. Maximum conductor cross section of the

single feed is 35 mm

When you plan and perform the installation, read and understand the following

notes:

• Refer to the national and local electrical codes for acceptable external wiring

practices.

• To allow for future kVA upgrades (software and/or hardware), consider using

conductors that are sized for the full bypass rating of the UPS.

• Material and labor for external wiring requirements must be provided by

designated personnel.

• For external wiring, use copper cable rated for 70 °C at minimum. See the

appropriate information in Table

. Cable sizes are based on using the

specified breakers.

• If cables are run in an ambient temperature greater than 30 °C, higher

temperature cable and/or larger size cable may be necessary.

• The bypass feed into this equipment uses four cables. The rectifier feed into

this equipment uses three or four cables. The phases must be symmetrical

about ground (from a Wye source) for proper equipment operation.

• If the load requires a neutral, a bypass source neutral must be provided. If

the load does not require a neutral and there is no neutral conductor

connected at the bypass input, a neutral must be installed to source star

point.

• A readily accessible disconnect device must be incorporated in all fixed input

wiring.

WARNING

Do not disconnect the bypass neutral without disconnecting the bypass

phases at the same time.

Table 8: Minimum recommended multi-core cable and fuse sizes for rectifier and bypass

input and UPS output cables

UPS rating (kW) 8 10 15 20 30 40

Cable [mm

]* 4*2.5 4*4 4*10 4*10 4*16 4*25

Rectifier fuse [A] 20 20 32 40 63 80

Bypass fuse [A] 20 20 32 40 63 80

Eaton 93PS UPS 8–40 kW User's and installation guide

Eaton 93PS-8(20)-20(-C) - Page 39