3.
Ground fault protection
If the upstream input power supply has an RCD, the transient state and steady state ground leakage current
upon the startup of the UPS shall be considered.
The RCCB shall meet the following requirements:
•
Be sensitive to the DC unidirectional pulse (class A) of the whole distribution network
•
Be insensitive to transient state current pulse
•
Have an average sensitivity which is 0.3 A to 3 A adjustable
The RCCB symbols are shown in Figure 4.1 below.
F igu re 4.1 R CCB sym bo ls
The UPS has an internal EMC filter, therefore the protective earth cable has leakage current which is less than
3000 mA. It is recommended to confirm the RCD sensitivity of the upstream input distribution and the
downstream distribution (to the load).
External battery
The BCB (mandatory) must be installed for protecting the external battery. The UPS provides an optional BCB cabinet to
provide overcurrent protection, short circuit protection, and automatic tripping functions for the external battery.
This BCB is important for the battery maintenance, and is installed near the battery.
System output
The UPS output distribution shall be configured with a protective device. The protective device shall be different from the
input distribution protection switch and able to provide overload protection (refer to Table 12.6 on page 174 and Table 12.7
on page 175).
N O T E: F o r IT grid system , 4-po le pro tective co m po n en ts m u st be in stalled fo r th e UP S extern al in pu t
po wer distribu tio n .
4 Electrical Installation
42
Vertiv™ Liebert® APM Plus User Manual
Summary of Contents for APM Plus 0500kMK16FN02000
Page 1: ...Vertiv Liebert APM Plus User Manual 50 500 kVA UPS...
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Page 34: ...2 Overview 26 This page intentionally left blank Vertiv Liebert APM Plus User Manual...
Page 45: ...Four switches 500 kVA 3 Mechanical Installation 37 Vertiv Liebert APM Plus User Manual...
Page 76: ...Figure 5 11 Customize the display 5 Touch Screen 68 Vertiv Liebert APM Plus User Manual...
Page 86: ...Figure 5 20 Enable module redundancy 5 Touch Screen 78 Vertiv Liebert APM Plus User Manual...
Page 91: ...Figure 5 24 Status Gauge setting options 5 Touch Screen 83 Vertiv Liebert APM Plus User Manual...
Page 92: ...5 Touch Screen 84 Vertiv Liebert APM Plus User Manual...
Page 94: ...5 Touch Screen 86 Vertiv Liebert APM Plus User Manual...
Page 95: ...Figure 5 26 Unit status Bypass details 5 Touch Screen 87 Vertiv Liebert APM Plus User Manual...
Page 96: ...Figure 5 27 Unit status Battery details 5 Touch Screen 88 Vertiv Liebert APM Plus User Manual...
Page 97: ...Figure 5 28 Unit status Load details 5 Touch Screen 89 Vertiv Liebert APM Plus User Manual...
Page 100: ...5 Touch Screen 92 Vertiv Liebert APM Plus User Manual...
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Page 184: ...12 Specifications 176 This page intentionally left blank Vertiv Liebert APM Plus User Manual...