F igu re 8 .4 EP O circu it diagram
N O T E: In
, th e u pper o n e is N o rm ally O pen type, an d th e lo wer o n e is N o rm ally Clo sed
type.
8.3 Operation Procedures for Parallel System
Only one step is needed for once, and only after finishing this operation step of each UPS module, the next step can be
carried on.
8.3.1 Startup Procedures in Normal Mode
These procedures are applicable to start the UPS under total power-down state, which means the UPS or the maintenance
bypass switch has not supplied the load before. Make sure UPS has been completely installed and commissioned by the
engineer, and external power supply switch has been turned off.
W A R N IN G !
1. T h ese pro cedu res resu lt in m ain s vo ltage bein g applied to th e UP S o u tpu t term in als.
2. If an y lo ad equ ipm en t is co n n ected to th e UP S o u tpu t term in als, ch eck with th e u ser th at it is
safe to apply po wer. If th e lo ad is n o t ready to receive po wer, disco n n ect th e do wn stream lo ad
switch , an d stick a warn in g label o n th e co n n ectio n po in t o f th e lo ad.
8 Parallel System and LBS System
137
Vertiv™ Liebert® APM Plus User Manual
Summary of Contents for APM 0250kMK16FN02000
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