Tripp Lite SU40KX, SU80KX, SU20KX Switching from Manual Bypass to Normal Mode Parallel UPS

19 – Start-Up, Shutdown and Bypass (continued)

9-11 Switching from Manual Bypass to Normal Mode (Parallel UPS)

2	•1	If the UPS systems have external battery cabinets connected,
		switch off the external battery cabinet circuit breaker switch A
		of each battery pack. On the SU20KX or SU40KX, turn OFF the
		battery breaker on the back of the UPS.
3
4	•2	Switch on the bypass input circuit breaker switch Q2 and the
		output circuit breaker switch		Q4 of each UPS system.
5
	•3 Confirm that both UPS systems are shut down, then switch off
		the manual bypass input circuit breaker switch Q3 of each UPS
		system. The LCD screen will read “ON AUTO BYPASS”.
6	•4	Switch on the main input circuit breaker switch Q1 of each UPS
		system.
	•5	Press the ON button A of the first UPS systems for 3 seconds
		(until you hear a beep), then release the button. Press the ON
7		button for the second UPS system for 3 seconds (until you hear
		a beep), then release the button. When the inverter of each UPS
		system is operating normally, they will switch to online (normal)
		mode at the same time.
8
					Q1
9
		Output	Manual	Bypass	Main
	4		Bypass	Input	Input

A

1
Q4		Q2
Output	Manual	Bypass	Main
2	Bypass	Input	Input

	Q3
Output	Manual	Bypass	Main
3	Bypass	Input	Input
			A

5

10

11

12

13

14

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