UPS Electrical Installation

Switch Auxiliary Inputs Dry Contacts

Table 3

Circuit breaker or switch auxiliary contact Inputs

 

 

 

 

 

 

 

 

 

Terminal

 

Connects to

Description

 

Item

Block

Pin

(description of external item)

of interface

 

 

 

1

CB or Switch aux. contact,

Input, protected

 

 

 

closed = CB or switch is closed

 

 

 

 

 

Rectifier Input Breaker

TB0810

2

CB or Switch aux. contact, common

+24V, 10mA,

(RIB), Form C

current limited

 

 

 

 

 

 

3

CB or Switch aux. contact,

Input, protected

 

 

 

closed = CB or switch is open

 

 

 

 

 

 

 

 

1

CB or Switch aux. contact,

Input, protected

 

 

 

closed = CB or switch is closed

 

 

 

 

 

Maintenance Isolation

TB0811

2

CB or Switch aux. contact, common

+24V, 10mA,

Breaker (MIB), Form C

current limited

 

 

 

 

 

 

3

CB or Switch aux. contact,

Input, protected

 

 

 

closed = CB or switch is open

 

 

 

 

 

 

 

 

1

CB or Switch aux. contact,

Input, protected

 

 

 

closed = CB or switch is closed

 

 

 

 

 

Bypass Input Breaker

TB0812

2

CB or Switch aux. contact, common

+24V, 10mA,

(BIB), Form C

current limited

 

 

 

 

 

 

3

CB or Switch aux. contact,

Input, protected

 

 

 

closed = CB or switch is open

 

 

 

 

 

 

 

 

1

CB or Switch aux. contact,

Input, protected

 

 

 

closed = CB or switch is closed

 

 

 

 

 

Maintenance Bypass

TB0813

2

CB or Switch aux. contact, common

+24V, 10mA,

Breaker (MBB), Form C

current limited

 

 

 

 

 

 

3

CB or Switch aux. contact,

Input, protected

 

 

 

closed = CB or switch is open

 

 

 

 

 

Control Status Output Dry Contacts

Status signals are outputs through volt-free, normally open and normally closed contacts.

Table 4

Control status output contact

 

 

 

 

 

 

 

 

 

Terminal

 

Connects to

Description

Item

 

Block

Pin

(description of external item)

of interface

 

 

 

1

Other equipment input,

Relay contact, 12A, 250VAC, normally

 

 

 

closed = EPO not active

closed, rest position = closed

EPO Status

 

 

 

 

TB0823

2

Other equipment input, common

Relay contact, common

Form C

 

 

 

 

 

 

 

 

 

3

Other equipment input,

Relay contact, 12A, 250Vac, normally

 

 

 

closed = EPO active

open, rest position = open

 

 

 

 

 

 

 

1

Maintenance Bypass Cabinet,

Relay contact, 12A, 250Vac, normally

 

 

 

closed = load not on inverter

closed, rest position = closed

Maintenance

 

 

 

 

Maintenance Bypass Cabinet,

 

Bypass

 

TB0821

2

Relay contact, common

 

common

Enable Form C

 

 

 

 

 

 

 

 

 

 

3

Maintenance Bypass Cabinet,

Relay contact, 12A, 250VAC, normally

 

 

 

closed = load on inverter

open, rest position = open

 

 

 

 

2.3.2Load Bus Synch Connection

Table 5 Load Bus Synch connection

 

Terminal

 

Connects to

 

Item

Block

Pin

(description of external item)

Description

 

 

 

 

 

Analog Load

 

1

Phase A from LBS

Input to voltage dropping resistors

 

 

 

 

TB0826

3

Phase B from LBS

Input to voltage dropping resistors

Bus Sync. (LBS)

 

 

 

 

 

 

5

Phase C from LBS

Input to voltage dropping resistors

 

 

 

 

 

10

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Image 14
Emerson 250 Switch Auxiliary Inputs Dry Contacts, Control Status Output Dry Contacts, Load Bus Synch Connection

250 specifications

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