Tripp Lite SUT30K Owner s Manual for SmartOnline r SUT 3-Phase UPS System 20/3 - Page 15

External Battery Cabinet Connection Precautions, WARNING

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3. Installation and Wiring 3.7 External Battery Cabinet Connection Precautions WARNING: 1. Connect loads to the UPS only after the batteries are fully charged. This guarantees that the UPS can provide sufficient backup power to the loads connected when a power failure occurs. 2. When using both the UPS internal batteries and external batteries, ensure the voltage difference is

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15
3. Installation and Wiring
3.7 External Battery Cabinet Connection Precautions
WARNING:
1. Connect loads to the UPS only after the batteries are fully charged. This guarantees that the UPS can provide
sufficient backup power to the loads connected when a power failure occurs.
2. When using both the UPS internal batteries and external batteries, ensure the voltage difference is <5V DC.
Battery
1. Charge Voltage
1) Float voltage: ±163.2V DC (default)
2) Boost voltage: ±168V DC (default)
2. Charge Current
1) Minimum:
SUT20K/SUT30K/SUT40K/SUT60K
g
1A
2) Maximum:
SUT20K
g
10A
SUT30K/SUT40K/SUT60K
g
20A
3) Default:
SUT20K
g
5A
SUT30K
g
7.5A
SUT40K
g
7.5A
SUT60K
g
10A
3. Low Battery Shutdown: 120V DC (default: 120V DC)
4.
Number of Batteries: SUT20K
g
48 pcs.
SUT30K
g
72 pcs.
SUT40K
g
72 pcs.
SUT60K
g
96 pcs.
Notes:
1. Charge current is adjustable from 1A to the 20A maximum in increments of 0.5A.
2. To modify the default charge current setting or default low battery shutdown setting, contact your local dealer or service personnel.
• Only use the same type of batteries from the same supplier. Never combine old, new or different Ah batteries at the same time.
• The number of batteries must meet UPS requirements.
• Do not connect the batteries in reverse polarity.
• When connecting a non-Tripp Lite external battery cabinet to the UPS, it is compulsory to install an appropriate non-fuse DC breaker
and fast-acting fuses (when short-circuit occurs, the melting current must be 5~6 times of the battery fuse’s rating current).
• To extend battery backup time, connect several external battery cabinets to the UPS.
Note:
Recharge time will be extended; take note of charger capacity.
• To extend battery backup time, external batteries may be connected to the UPS.
Rating Power (kVA)
Circuit Breaker
Rating Current
Battery Cable
Battery Fuse
20
250V AC / 75A
1 AWG (35 mm
2
)
660V DC / 80A
30
250V AC / 125A
1/0 AWG (50 mm
2
)
660V DC / 125A
40
250V AC / 150A
3/0 AWG (95 mm
2
)
660V DC / 150A
60
250V AC / 225A
250 kcmil (120 mm
2
)
660V DC / 225A