The UPS can be programmed into frequency converter mode for either 50 Hz or 60 Hz stable output frequency. The input
frequency may vary from 40 Hz to 70 Hz. Under this mode, it is required to open the maintenance bypass switch to disable
the static bypass operation, and the battery becomes optional depending on any requirement to operate in battery mode.
Parallel redundancy mode (system expansion)
For higher capacity or reliability, the outputs of multiple UPS modules can be programmed for directly paralleling while a
built-in parallel controller in each UPS module ensures automatic load sharing. The parallel system can be composed of up
to four UPS modules. For the operation principle diagram of the parallel redundancy mode, see Figure 8.1 on page 142.
LBS mode
A dual bus system consists of two independent UPS systems, each containing one or more parallel UPS modules. The dual
bus system has high reliability and is applicable to the load with multiple inputs. For single-input load, an STS can be
installed to power the load. For the operation principle diagram of the LBS mode, see Figure 8.5 on page 149 and Figure 8.6
on page 150.
2.5 Battery Management
The following battery management functions are set by the service engineer through the Vertiv firmware setting.
2.5.1 Normal Function
1.
Constant current boost charge
Adopt the constant current (within battery charging limit) to charge the battery. This function can be used for
fast recovery of battery capacity. The charge current can be set.
2.
Constant voltage boost charge
Adopt the constant voltage to charge the battery. This function can be used for fast recovery of battery
capacity. For VRLA batteries, the maximum boost charge voltage should not exceed 2.4 V/cell.
3.
Float charge
This charging method is used to keep battery in full capacity. The float charge voltage is low. This function can
balance the capacity loss due to battery self discharge, and can be used for battery capacity recovery.
For VRLA batteries, the float charge voltage should be between 2.2 V/cell and 2.3 V/cell.
4. Automatic transfer to float charge
When the charge current is less than 'Threshold of Equalize Charge to Float Charge' or 0.5 A, the charger will
automatically transfer from boost charge to float charge. When boost charge time exceeds the limit of 'Equalize
Charge Protect Time Limit', the charger will be forcibly transferred to float charge for protecting the battery.
5.
Float charge temperature compensation (optional)
This function must be used together with the battery temperature detection device. The Vertiv battery
temperature sensor is a standard option for your selection.
2 Overview
23
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...
Page 112: ...5 Touch Screen 104 This page intentionally left blank Vertiv Liebert APM Plus User Manual...
Page 184: ...12 Specifications 176 This page intentionally left blank Vertiv Liebert APM Plus User Manual...