User Manual
Table Of Contents
- PM230 Power Module, IP55
- Legal information - Warning notice system
- Table of contents
- 1 Changes in this manual
- 2 Fundamental safety instructions
- 3 Launch
- 4 Installing/mounting
- 5 Connecting
- 6 Service and maintenance
- 7 Technical data
- 7.1 Overload capability of the inverter
- 7.2 Cable cross-sections and tightening torques
- 7.3 Electromagnetic compatibility - Overview
- 7.4 Ambient conditions
- 7.5 General technical data
- 7.6 Specific technical data
- 7.7 Restrictions for special ambient conditions
- 7.8 Current reduction depending on pulse frequency
- 7.9 Electromagnetic compatibility of variable-speed drives
- 8 Spare parts and accessories
- A Appendix
- Index
Technical data
7.1 Overload capability of the inverter
PM230 Power Module, IP55
48 Hardware Installation Manual, 12/2016, A5E35319202B AB
7.1
Overload capability of the inverter
Overload capability is the property of the inverter to temporarily supply a current that is
higher than the rated current to accelerate a load. Two typical load cycles are defined to
clearly demonstrate the overload capability: "Low Overload" and "High Overload"
Definitions
Base load
Constant load between the accelerating phases of the drive
Low Overload
High Overload
•
LO base load input current
Permissible input current for a "Low
Overload" load cycle
•
LO base load output current
Permissible output current for a "Low
Overload" load cycle
•
LO base load power
Rated power based on the LO base load
output current
•
HO base load input current
Permissible input current for a "High
Overload" load cycle
•
HO base load output current
Permissible output current for a "High
Overload" load cycle
•
HO base load power
Rated power based on the HO base
load output current
If not specified otherwise, the power and current data in the technical data always refer to a
load cycle according to Low Overload.
We recommend the "SIZER" engineering software to select the inverter.
You will find additional information about SIZER on the Internet: Download SIZER
(http://support.automation.siemens.com/WW/view/en/10804987/130000).
Load cycles and typical applications:
"Low Overload" load cycle
"High Overload" load cycle
The
"Low Overload" load cycle assumes a
uniform base load with low requirements
placed on brief accelerating p phases. Typ
i-
cal applications when designing according
to "Low Overload" include:
•
Pumps, fans and compressors
•
Wet or dry blasting technology
•
Mills, mixers, kneaders, crushers,
agitators
•
Basic spindles
•
Rotary kilns
•
Extruders
The "High Overload" load cycle permits, for
reduced base load, dynamic accelerating
phases. Typical applications when desig
n-
ing according to "High Overload" include:
•
Horizontal and vertical conveyor
technology (conveyor belts, roller
conveyors, chain conveyors)
•
Centrifuges
•
Escalators/moving stairways
•
Lifters/Lowerers
•
Elevators
•
Gantry cranes
•
Cable railways
•
Storage and retrieval machines