UPS 120, UPS 150, UPS 250, UPS 300, UPS 301, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supplies Caterpillar


General Information (SMS Bypass Cabinet)

Usage:

UPS 250 APZ
The Bypass cabinet (SMS) is one of the two utility input cabinets in an SMS system. The other cabinet is the cabinet for the Flywheel.

The Bypass cabinet provides the primary connection points for all AC connections to the UPS.

If switches are present, facility 3-phase wiring is connected to the bus bars. The bus bars are attached to the switches on the upper right side of the cabinet.

3-wire power or 4-wire power, regulated or not regulated, leaves the cabinet for the SMS Bypass via the output switch.



Illustration 1g01257326
Bypass Cabinets (Front View with Shields)
(1) Bypass Switch (optional)
(2) Output Switch (optional)
(3) Input Switch (optional)
(4) Upper Shield
(5) Lower Shield
(6) GSM Circuit Breaker (optional)


Illustration 2g01257330
Right View of the Bypass Cabinet
(7) Right Panel
(8) Static Bypass Panel
(9) Rear Panel (3-wire only)
(10) Zig Zag Transformer (4-wire only)


Illustration 3g01257332
Left View of the Bypass Cabinet
(11) Left Panel (4-wire only)


Illustration 4g01258416
Left Panel View (4-Wire) of the Bypass Cabinet
(12) Contactor "K5"
(13) Fuse "F33"
(14) Thyristor "Q7"
(15) Zig Zag Controller Board "ZZC"
(16) Zig Zag Circuit Breaker "CB2"


Illustration 5g01258444
View of the Rear Panel (3-Wire) of the Bypass Cabinet
(17) Resistor "R19"
(18) Zig Zag Grounding Transformer "T5"
(19) Zig Zag Overload Relay "OLR1"


Illustration 6g01258495
View of the Right Panel of the Bypass Cabinet
(20) Contactor "K3"
(21) Capacitor "C47"


Illustration 7g01258554
View of the Assembly Panel for the Static Bypass
(22) Contactor "K4"
(23) Line Disconnect or Fuse Disconnect
(24) Fuses "F22, F23, F24"
(25) Snubber Assemblies
(26) Bypass Cabinet Controller (BBC)
(27) Line Disconnect or Thyristor Disconnect

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