Emerson 185 manual Functional Test, Manual Operation, Voltage Checks, Electrical Operation

Series 185 FUNCTIONAL TEST

After installing the Series 185 automatic transfer switch (ATS) perform the following three–part functional test.

1 --- Manual Operation

A handle is provided on the transfer switch for mainte- nance purposes only. Manual operation of the transfer switch should be checked before it is energized (operated electrically).

Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.

1.Turn OFF both the utility and generator circuit breakers feeding the ATS. Verify that ALL POWER

IS OFF!

2.100–230 A

Grasp the maintenance handle and turn it quickly with your thumb and fingers to manually operate the transfer switch.

260–400 A

Insert the maintenance handle into the hole in the shaft, left side of the operator. Move the handle as shown to manually operate the transfer switch.

3.The switch should operate smoothly without binding. If it does not, check for shipping damage or construction debris.

4.After checking the manual operation, use the handle again to return the transfer switch to the utility source position.

100–230 A see Figure 8.

The letter P (utility) on the round weight is facing you.

260–400 A see Figure 9.

The letter N (utility) on the round weight is facing you.

Remove the maintenance handle and store it on the transfer switch in the place provided.

260–400 A Remove the maintenance handle before proceeding!

2 --- Voltage Checks

The ATS is rated for 220–240 V ac 60 or 50 Hz. Verify that both the utility and generator sources are 220–240 V ac 60 or 50 Hz.

maintenance handle

With ALL POWER OFF grasp maintenance handle and turn it quickly with your thumb and fingers.

weight marked P (utility) and A (generator)

Figure 8. Maintenance handle for 100–230 A.

hole	maintenance
	handle
shaft

Figure 9. Maintenance handle for 260–400 A.

3 --- Electrical Operation

This procedure checks the electrical operation of the ATS.

1.Install the enclosure cover and tighten the screws.

2.Verify that the generator battery is connected and that the generator’s starting controls are set for automatic.

3.Turn on both the utility and generator circuit breakers.

4.Verify that the Utility Acceptable and Load on Utility lights are on.

5.This step will start the generator. Press and hold the Transfer Test button until the Generator Acceptable light comes on and stays on. Then release the button.

6.After the Generator Acceptable light comes on, the ATS transfers the load from the utility to the generator (after approx. 10 second delay). The Load on Generator light comes on.

7.The ATS stays connected to the generator for 15 minutes (approx.). The utility must be acceptable for 15 minutes continuously. Then the load is trans- ferred back to the utility. To bypass time delay, press the Bypass Time Delay button.

8.After load retransfer to utility, the generator runs 5 minutes (without load), then shuts down. The Generator Acceptable light goes off indicating that the generator is off.

This completes the Functional Test.

381333–319 A 6