Emerson 381333122 E manual Time Delay Adjustment, Sensor Adjustments, Time Delay Settings

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 corre- sponding adjustment DIP switch or potentiometer.

Table 4-1. Time Delay Settings

DESCRIPTION	LABELS	FACTORY	ADJUSTMENT	S3 DIP
		SETTING	RANGE	SWITCH
Override Momentary	TD ES	3 seconds	1 second	Actuator 1 on
Normal Source Outages			3 seconds	Actuator 1 off
Transfer to Emergency	TIMER	0 minutes	0 to 5	—
	N/E	(full ccw)	minutes
Override Momentary	—	4 seconds	non-adjustable	—
Emergency S. Outages
Retransfer to Normal	TIMER	30 minutes	1 second to	—
	E/N	(full cw)	30 minutes
Unloaded Running	—	5 minutes	non-adjustable	—
(Engine Cooldown)

		ADJUSTMENT
		POTENTIOMETER
	1	—
	1
—		P2
—		—
—		P1
—		—

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.

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.

Table 4-2. Voltage and Frequency Settings. ( 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
					Actuator 2 off
	DO / N	Dropout	85 %
				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

3 3 1 2 1 2 1 2 1 2

4 4 6 6

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

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

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