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SAFETY FOR LIFE

S260-75-1

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Figure 14.

020076KM

 

Type S control front panel.

 

 

 

TABLE 4

Description and Use of Operating Controls and Indicators

Index No.

 

 

Figure 2

Description

Purpose and Use

1

SOURCE PREFERENCE AND RETURN MODE

Selects either Source I (PREF I) or Source II (PREF II) as the

 

Switch (S4) (See Note A)

preferred source, or no preference (NO PREF). Also selected

 

 

parallel (P) or non-parallel (NP) return mode.

2

SOURCE I ENERGIZED lamp

Indicates all three phases of Source I are energized.

3

OPERATION SELECTOR Switch (S3)

Programs control for either AUTOmatic or MANUAL operation.

4

PREFERRED TO ALTERNATE TIMER

Determines time delay before transfer to alternate source when

 

 

preferred source voltage is lost.

5

SWITCH I OPEN and CLOSED lamps

Indicates status of Source I high voltage switch.

6

LAMP TEST switch (S6)

Tests all indicating lamps on front panel.

7

LATCH RELAY STATUS TEST terminals

Provides electrical access to both sides of latch relay to

 

(T1— T2— T3)

determine if control is in Source I or Source II mode.

8

SWITCH II OPEN and CLOSED lamps

Indicates status of Source II high voltage switch.

9

ALTERNATE TO PREFERRED TIMER

Determines the time delay before transfer to preferred source

 

 

when preferred source voltage is restored.

10

MANUAL OPER. SOURCE I and MANUAL OPER.

Provides means to OPEN and CLOSE Source I and Source II

 

SOURCE II switches (S1 and S2)

transfer switch upon manual command, when S3 is in MANUAL

 

 

position.

11

SOURCE II ENERGIZED lamp

Indicates all three phases of Source II are energized.

12

CONTROL MODE switch (S5)

Blocks automatic return transfer to preferred sources (HOLD ON

 

 

ALTERNATE); also enables control to be operated without

 

 

operating the high voltage transfer switches (TEST).

13

FAULT-BLOCK OPERATED lamp

Indicates fault-block has operated (part of fault-block accessory).

14

RESET switch (S7)

Resets the control after a fault block operation (part of fault-block

 

 

accessory). S3 must be in MANUAL position.

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Fuses

Voltage input of all three phases of both Source I and Source II

 

 

are fused for 10A-125 vac; white button shows on front of fuse if

 

 

fuse blows.

 

 

 

Note A — Tab provided to lock switch knob in set position; stop screw prevents inadvertent selection of parallel return transfer mode.

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