TESTING & SERVICE (continued)
MANUAL LOAD TRANSFER
This procedure will manually transfer the load if the controller is disconnected.
Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.
1.Deenergize both the normal and emergency source conductors (remove fuses or open circuit breakers).
2.Use the maintenance handle to manually operate the transfer switch to the opposite source. See Manual Operation on page
3.Then remove the maintenance handle. See page
Verify that the maintenance handle has been removed before proceeding!
4.If the transfer switch is in the Emergency position manually start the engine generator and then install emergency source fuse or close the circuit breaker.
TROUBLE-SHOOTING
Note any optional accessories that may be furnished on the automatic transfer switch (ATS) and review their operation. Refer to any separate drawings and/or instructions that may be packed with the ATS.
Hazardous voltage capable of causing shock, burns, or death is used in this switch.
Do not touch the power or load terminals of the transfer switch!
Table 2-1. Trouble-Shooting Checks.
PROBLEM | CHECK IN NUMERICAL SEQUENCE | |||
1 | 2 | 3 | ||
| OPERATION |
| VOLTAGE | |
Hold Transfer Test switch 15 | Starting control must be in the |
| ||
not start when the Transfer | seconds or the outage must | automatic position. Batteries |
| |
Control switch is turned and | be long enough to allow for | must be charged and |
| |
held in Transfer Test position | Feature 1C time delay plus | connected. Check wiring to | – | |
or when the normal source | engine cranking and starting | engine starting contacts on | ||
| ||||
fails. | time. | customer terminal block TB. |
| |
|
| Verify that the small plug J3 is |
| |
|
| connected to receptacle P3. |
| |
|
|
|
| |
Transfer switch does not | Wait for Feature 2B time delay | Generator output circuit | Voltmeter should read at least | |
transfer the load to the | to time out (if used). | breaker must be closed. | 90% of nominal phase to | |
emergency source after the |
| Generator frequency must be | phase voltage between | |
| at least 95% of nominal | transfer switch terminals EA | ||
|
| (57 Hz for a 60 Hz system.) * | and EC (or EL1 and EL2 for 2 | |
|
|
| pole switches). * | |
|
|
|
| |
Transfer switch does not | Wait for Feature 3A time delay |
| Voltmeter should read at least | |
transfer the load to normal | to time out (if used). |
| 90% of nominal phase to | |
source when normal returns |
|
| phase voltage between | |
or when the Transfer Control |
| – | transfer switch terminals NB | |
switch is released. |
|
| and NC, NC and NA, and NA | |
|
|
| and NB (or NL1 and NL2 for 2 | |
|
|
| pole switches). | |
|
|
|
| |
Wait for Feature 2E time delay | Starting control must be in the |
| ||
not stop after load retransfer | to time out (if used). | automatic position. | – | |
to the normal source. |
|
|
| |
|
|
|
|
* These are factory settings. Refer to the Group 5 Controller User’s Guide.
If the problem is isolated to circuits on the controller or the transfer switch, call your local ASCO Power Technologies sales office or ASI. In the United States, call