Emerson 208V, 10-30kVA 4.1Bypass Switch, 4.2Normal UPS Mode, 4.0MAINTENANCE BYPASS CABINET

Maintenance Bypass Cabinet

4.0MAINTENANCE BYPASS CABINET

The Maintenance Bypass Cabinet is designed to operate in UPS mode, bypass mode and maintenance mode. The mode is selected using the Bypass Switch.

Figure 17 Single UPS with external Maintenance Bypass Cabinet—typical configuration

N

Input Mains

Supply A B C

Input Supply

A B C

N

Sys In CB1

Qin UPS

UPS 1

Charger

Fuse

Battery1

CB 1

Rectifier

CB 1

SW1-C

Static

Switch

Inverter

SW1-D

Rotary Switch

SW

Ext Byp SW1-A

N

A B C

Y

Ext Byp

QoutUPS

Sys Out CB2

N

To Load

4.1Bypass Switch

The Bypass Switch allows easy and rapid transfer of connected loads between the UPS and Bypass source.

4.2Normal (UPS) Mode

While the Maintenance Bypass Cabinet rotary switch is in the NORMAL position, the UPS is supply- ing the connected load with continuous, high-quality AC power. In this mode of operation, the load is protected by the UPS.

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