Emerson THROUGH 1200 manual Engine Starting Contacts, Auxiliary Circuits

INSTALLATION (continued)

Engine Starting Contacts

All customer connections, including the engine control contact connections, are located on terminal block TB which is mounted on the top right side of the enclosure. Refer to the wiring diagram provided with the automatic transfer switch and connect the engine start wires to the appropriate terminals. See Figure 1–1 and Table A.

Table A. Engine start connections.

When normal source	Terminals on
fails	Terminal Block TB
contact closes	TB1 and TB2
contact opens	TB1 and TB3

Note: To temporarily disable engine control from the automatic transfer switch you can unplug J3 from the small P3 receptacle at the bottom of the assembly. Be sure to reconnect plug J3 to the P3 receptacle for automatic transfer switch operation.

Auxiliary Circuits

Connect auxiliary circuit wires to appropriate terminals on transfer switch terminal block TB as shown on the wiring diagram provided with this automatic transfer switch.

engine start connections on customer terminal block TB

Figure 1-1. Customer terminal block on the top right

side of the enclosure.

Functional Test

The Functional Test consists of three checks:

❐1 — Manual Operation Test, page 1–3

❐2 — Voltage Checks, page 1–4

❐3 — Electrical Operation, page 1–5

!

Do these checks in the order presented

to avoid damaging the ACTS.

Read all instructions on the Wiring Diagram and labels affixed to the automatic transfer switch. Note the control features that are provided and review their operation before proceeding.

Note the position of the contact shafts as shown below.

Emergency contacts (upper shaft)

window indicators	contact
	position
O is open
	indicators
C is closed
	(right side)

Normal contacts

(lower shaft)

Figure 1-2. Contact position indicators.

Shown with Emergency open and Normal closed.

Continue to 1 – Manual Operation Test on next page.

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