SMARTZONE UPS INSTALLATION MANUAL
64
2. When the mains input and bypass input have the same input
power source (known as single feed), configure both types of
input power cables as mains input power cables. The cables
listed in the table must adhere to the following requirements:
a. Routing mode: Routing the cables over the cable ladder or
bracket in a single layer (IEC60364-5-52 middle E).
b. The maximum ambient temperature should be 30°C.
c. The AC voltage loss must be less than 3%, and the DC
voltage loss must be less than 1%.
d. Must use 90°C rated or higher copper flexible cable.
e. The AC power cable length cannot exceed 30m and the
DC power cable length cannot exceed 50m.
3. The cable must conform to the local wiring codes according to
environmental conditions (temperature and natural conditions).
4. Each part of the system must maintain a connected earth ground.
ii. Before hardwiring the MBS unit, ensure that there is no power on the
wires, use lock-out tag-out at the breaker panel / local disconnect.
iii. Remove the protective cover on the terminal block housing on the back
of the MBS.
iv. Feed the input cable through a provided cable gland and appropriate
hole on terminal block housing.
Note:
Ensure that the cable gland is
separated on each side of the terminal block house to allow for the cable
to be secured to the housing.
v. Crimp a ring terminal onto each wire with a standard crimping tool for
the wire size.
vi. Connect each wire under the appropriate screw as indicated on the back
of the MBS (see the appropriate wire connection diagram in Figures 77
- 80 and bus jumpers in Figure 81).
Note:
Each part of the system must
maintain a connected earth ground.
vii. After completing the wiring, confirm again that all wiring is correct.
viii. Tighten the cable gland to the terminal block housing to secure the cable
to the MBS.
ix. Leave the terminal block cover off the housing for the next step of
connecting the load(s).
2. Connect the load(s) to the MBS:
a. The MBS unit has a hardwire output load (UMB20K).
i. The wired connections must be appropriately sized.
1. Refer to the table below for the output power cable to be used
based on the UPS unit being deployed.
a. If the rated voltage is 400 V, multiply the currents by 0.95.
If the rated voltage is 415 V, multiply the currents by 0.92.
b. If primary loads are non-linear loads, increase the cross-
sectional areas of neutral wires by 1.5 to 1.7 times.
2. The cable must conform to the local wiring code according to
