26
3
Installing Battery Cables
External Battery Strings
Scenario 1
Ground
point
External Battery Strings
Battery 1
Battery 20
Battery 40
Connect cables based on site
requirements. For details about
the wiring terminals, external
circuit breakers, cable cross-
sectional areas, and terminal
types, see the method for a
single UPS system.
M6 (10 PCS)
4.8 N•m
1. The UPS2000-G-15KRTL/20KRTL can connect to an external battery string (40 batteries in the
standard configuration, and an even number of 32 to 40 batteries are supported). The neutral
wire is connected to the middle point of the battery string. For example, if there are 40
batteries, the neutral wire is connected to the negative terminal of the twentieth battery.
2. When an external battery string is connected, install a DC circuit breaker (63 A, 600 V DC)
between the battery string and the UPS. If a 2+0 or higher parallel system shares a battery
string, use a larger-capacity battery circuit breaker accordingly.
3. When an external battery string is connected, connect positive terminals in series by using the
two poles of the DC circuit breaker.