Emerson ADTS manual Installation, Controller Ground, Harnesses, Auxiliary Circuits

INSTALLATION (continued)

Controller Ground

A grounding wire must be connected to the controller’s lower left mounting stud. Because the controller is mounted on the enclosure door, a conductive strap must be used between the enclosure and the door. This connection provides proper grounding which does not rely upon the door hinges.

Harnesses

The transfer switch is connected to the left side of the control panel by a plug-in harness (two plugs).

Auxiliary Circuits

Connect auxiliary circuit wires to appropriate terminals on the transfer switch. Note the control features that are furnished on this switch. Make the necessary auxiliary connections by referring to the Wiring Diagram.

Engine Starting Contacts

The engine control contact connections (if used) are located on the transfer switch. Connect signal wires to appropriate terminals as specified in Table B and shown in Figures 1–1 and 1–2. See the wiring diagram too.

Table B. Engine start connections

When normal			Terminals on
source fails			transfer switch
contact closes			TB1 and TB2
contact opens			TB1 and TB3
left side of transfer switch
COMMON		Engine Starting
FEATURE 7		Signals
		5 amps, 32 V DC
closes to start
	5 amps resistive 28 V DC
FEATURE 8
		or 120 V AC max.
opens to start
COMMON		TS Auxiliary Contacts
FEATURE 14B		Feature 14A & 14B
		10 amps, 32 V DC
closed on emergency
		10 amps 250 V AC
FEATURE 14A
		general purpose
closed on normal
COMMON		Optional
		TS Auxiliary Contacts
FEATURE 14BA		Feature 14AA & 14BA
		10 amps, 32 V DC
closed on emergency		10 amps 250 V AC
FEATURE 14AA
		general purpose

closed on normal

Figure 1-1. Connections to engine starting contact terminal block for 150 through 1200 amp.

J & H–design transfer switches.

Engine Starting	TS Auxiliary Contacts
Signals	Feature 14A & 14B
5 amps, 32 V DC	10 amps, 32 V DC
5 amps resistive 28 V DC	10 amps 250 V AC	TB Terminal Block
or 120 V AC max.	general purpose
		(field connections)
		accepts wire range
FEATURE 7 closes to start FEATURE 8 opens to start		22–12 AWG

Figure 1-2. Connections to engine starting contact terminal block located on 1600 through 3000 amp.

G–design transfer switches.

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