Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

OPERATING INSTRUCTIONS

!

DANGER: Hazardous voltage. Contact with haz-

ardous voltage will cause death or severe person-

 

al injury. Follow all locally approved safety procedures when working around high and low voltage lines and

equipment.

G103.3

 

 

 

 

 

!

WARNING: Hazardous voltage. Never rely on

the open position of the operating handle or the

 

contact position indicator; it does not ensure that the line is deenergized. Follow all locally approved safety practices. Failure to comply can result in contact with high voltage, which wil cause death or severe person-

al injury.

G123.1

Before energizing the installation, an understanding of the functions of the operating controls and indicating lights is essential. (See Table 4 and Figure 14).

Initial Operation

To place the automatic transfer scheme into service, proceed as follows:

CAUTION: Equipment misoperation. Source I and Source II high voltage switches can be paralleled in the manual operation mode even if SOURCE PREFERENCE switch, S4, is set for NP (non-parallel opera- tion). Make sure both sources are in synchronism if a manual parallel operation is to be performed. Failure to comply can result in misoperation (unintended opera-

tion) and equipment damage.

T304.0

1.The switches on the front panel should be positioned as follows:

A.S1 (MANUAL OPER. SOURCEI) — OFF

B.S2 (MANUAL OPER. SOURCE II) — OFF

C.S3 (OPERATlON SELECTOR) — MANUAL

D.S4 (SOURCE PREFERENCE AND RETURN MODE) — set to the desired mode of operation.

E.S5 (CONTROL MODE) — NORMAL

2.Set the PREFERRED TO ALTERNATE TIMER and ALTERNATE TO PREFERRED TIMER as required. (See Time Delay section in this manual.)

3.Check that all installation connections are complete as shown in the appropriate connection diagram Figures 5 through 8.

4.Make sure both high-voltage transfer switches are open.

5.With all six fuses in place, energize both power sources to the control.

A.SOURCE I ENERGIZED lamp should be on.

B.SOURCE II ENERGIZED lamp should be on.

C.SWITCH I OPEN lamp should be on.

D.SWITCH II OPEN lamp should be on.

6.Depending upon which source is the preferred source, momentarily operate either S1 or S2 to the CLOSE position. The appropriate switch will close to energize the load and its status indicating lights will transfer from OPEN to CLOSED.

7.Place the OPERATION SELECTOR SWITCH (S3) to AUTO. The S control is in service. No further opera- tion will occur until the preferred source voltage is lost.

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