SECTION 4 ADJUSTMENTS

Time Delay Adjustment

Standard time delays are set to customer specifications (if none specified, standard factory settings are used).

To change a setting, follow procedure on page 4-2. Use Table 4-1 as a guide to time delay values and their cor- responding adjustment DIP switch or potentiometer.

Table 4-1. Time Delay Settings

DESCRIPTION

LABELS

FACTORY ADJUSTMENT

SETTING RANGE

S3 DIP SWITCH

ADJUSTMENT

POTENTIOMETER

Override Momentary

TD ES

3 seconds

1 second

Actuator 1 on

 

 

 

 

 

 

1

 

—

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal Source Outages

 

 

 

 

 

 

 

 

 

 

3 seconds

Actuator 1 off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transfer to Emergency

TIMER

0 minutes

0 to 5

—

 

 

 

—

 

 

P2

N/E

(full ccw)

minutes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Override Momentary

—

4 seconds

non-adjustable

—

 

 

 

—

 

 

—

Emergency S. Outages

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Retransfer to Normal

TIMER

30 minutes

1 second to

—

 

 

 

—

 

 

P1

E/N

(full cw)

30 minutes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unloaded Running

—

5 minutes

non-adjustable

—

 

 

 

—

 

 

—

(Engine Cooldown)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sensor Adjustments

Voltage and frequency sensor pickup and dropout points are set to customer specifications (if none specified, standard factory settings are used). To change a setting, follow procedure on page 4–2. Use Tables 4-2 and 4–3 for settings and corresponding DIP switch actuators.

Table 4-2. Voltage and Frequency Settings. (

NOTICE

Any change in these settings may affect the normal operation of the automatic transfer switch. This change could allow the load circuits to remain connected to a low voltage source.

Shaded DIP switches are standard factory settings).

DESCRIPTION

LABELS

SETTING

 

% of nominal

S1 DIP

 

FACT. SET

ADJ RANGE

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

PU / N

Pickup

90 %

95 % *

Actuator 3 off

 

 

90 %

Actuator 3 on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

90 % *

Actuator 1 off

 

 

 

 

 

 

 

 

 

 

 

 

Actuator 2 off

 

Normal Source Voltage

 

 

 

 

 

 

 

 

 

 

85 %

Actuator 1 on

 

 

 

 

 

 

 

 

 

 

85 %

Actuator 2 off

 

 

DO / N

Dropout

 

 

 

80 %

Actuator 1 off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Actuator 2 on

 

 

 

 

 

 

 

 

 

 

 

 

 

70 %

Actuator 1 on

 

 

 

 

 

 

 

 

 

 

 

 

Actuator 2 on

 

 

 

 

 

 

 

 

Emergency Source

– –

Pickup

90 %

non-adjustable

– –

Voltage

– –

Dropout

75 %

non-adjustable

 

 

 

– –

Pickup

95 %

non-adjustable

– –

Emergency Source

– –

Dropout

85 %

non-adjustable

 

 

 

 

 

 

60 Hz

Actuator 4 off

Frequency

60 / 50

60 / 50 Hz

60 Hz

 

Hz

50 Hz

Actuator 4 on

 

 

 

 

 

 

 

 

 

Voltage Phases

3, 1

3 / 1

 

3

3 phase

Actuator 6 off

 

1 phase

Actuator 6 on

 

 

 

 

 

* If dropout voltage is set to 90%, the pickup voltage must be set to 95%.

3 3 1 2 1 2 1 2 1 2

4 4 6 6

Table 4-3. Transformer Voltage Adjust.

(Low setting shifts all voltage settings down 4.2%; for example, 240 V to 230 V, or 480 V to 460 V)

DESCRIPTION

LABELS

FACTORY SETTING

ADJUSTMENT

S3 DIP SWITCH

Voltage Adjust (4.2%)

LOW /

HI

LOW

Actuator 2 off

 

 

 

 

 

HI

HI

Actuator 2 on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 2

4---1

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Emerson 300 manual Time Delay Adjustment, Sensor Adjustments, Time Delay Settings, Voltage and Frequency Settings
Page 12 Page 14

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