Mitsubishi Electric 9900B Series Owner Technical Manual page 46

MITSUBISHI
ELECTRIC
CAUTION: After the completion of the input power cables connection:
3. Connect the grounding conductor from the input service entrance to the UPS Ground Bar
(E).
4. Two (2) sources feeding the UPS:
(1) Connect the AC input power cables from the input service entrance to the AC input
power terminals, identified as A, B, C in Figures 3.1 to 3.3. Input cables must be sized
for an ampere rating larger than the maximum input drawn by the converter (refer to
the equipment nameplate for current ratings). Confirm that an external bypass input
circuit breaker (MCCB) is installed (refer to WARNING 4, page 1-5). Connect the
bypass input power cables from the input service entrance to the bypass input power
terminals, identified as A40, B40 and C40 in Figures 3.1 to 3.2. Bypass input cables
must be sized for an ampere rating larger than the maximum output current capacity
of the UPS. Refer to Table 3.4 for recommended cable sizes.
(2) Connect the external signal terminal block as desired. Refer to section 2.4 and Figure
2.10 for a functional description. A 2mm
recommended.
5. One (1) source feeding the UPS:
(1) Confirm that an external input circuit breaker sized to protect both the AC input and the
bypass line is installed (refer to the equipment nameplate for current ratings). Connect
the bypass input power cables from the input service entrance to the bypass input
power terminals (identified as A40, B40 and C40 in Figures 3.1 to 3.3). Input cables
must be sized for an ampere rating larger than the maximum current capacity of the
UPS. Refer to Table 3.4 for recommended cable sizes.
(2) Using adequately sized conductors and referring to the appropriate figure identified in
Figures 3.1 to 3.2, connect the jumper bypass terminals (A40, B40, C40) to AC input
power terminals (A, B, C). Refer to Figures 3.1 to 3.2.
(3) Connect the external signal terminal block as desired. Refer to section 2.4 and Figure
2.10 for functional description. A 2mm
9900B SERIES UPS
OWNERS / TECHNICAL MANUAL
With a phase rotation meter, check that the phase rotation of the
AC Input power terminals A, B and C as well as the Bypass Input
power terminals A40, B40 and C40 are correct. The proper phase
rotation is clockwise:
A → B → C.
MITSUBISHI ELECTRIC 9900B SERIES UPS
, or less, shielded conductor is
2
, or less, shielded conductor is recommended.
2
Page Number:
3-3