Emerson 400A 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 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

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