UPS1000Z, UPS1200Z, UPS500G and UPS600G Uninterruptible Power Supplies Caterpillar

The system cabinet for the Multiple Module System (MMS) contains most the electronic control circuitry for the system. The MMS cabinet manages many UPS operations.

Illustration 1	g03797561
The number of MMU disconnect (isolation) switches will depend on the installation needs. (1) Fans (2) MMU disconnect switches (3) T1 and T2 transformers (4) System I/O and daughter boards (5) Static bypass control board

Illustration 2	g03376780
The number of MMU disconnect (isolation) switches will depend on the installation needs. MMS system cabinet view (9) MMU 1 input isolation switch (10) MMU 1 output isolation switch (11) MMU 2 input isolation switch (12) MMU 2 output isolation switch (13) MMU 3 input isolation switch (14) MMU 3 output isolation switch (15) MMU 4 input isolation switch (16) MMU 4 output isolation switch (17) Flywheel

Illustration 3	g01267899
Left panel of the MMS cabinet (20) Fan monitor PWA (21) Power distribution capacitors (22) Modem power transformer T4 (23) Power distribution PWA (24) Modem power supply (25) Parallel cabinet controller PWA (26) ESS fuses F4-F6 (27) EPO reset switch (28) 24 VDC power supplies (29) Parallel cabinet interface PWA (30) Transformer T2 (31) Transformer T1 (32) AC interface PWA (33) Secondary current transformers (34) System input/output PWA (35) Transformer T3 (36) Fuses F7-F12 (37) System input/output daughter PWA (38) External source sync (ESS) relay

Illustration 4	g01267903
Right panel of the MMS cabinet (40) Fuses (F1, F2, F3) (41) Static switch assembly (42) Ground reference assembly (43) Neutral reference assembly

Illustration 5	g03797579
Static switch assembly components (5) Static bypass control board (40) Fuses (F1, F2, F3) (44) K4 disconnect