Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 204

02.12
05.01
Overvoltage limiter modulel
Application
The overvoltage limiter module limits overvoltages at the line supply input to
acceptable values. These overvoltages can occur, e.g. due to switching opera-
tions at inductive loads and line supply matching transformers.
The overvoltage limiting module is used for upstream transformers or for line
supplies that are not in conformance with IEC (unstable line supplies) or in line
supplies where frequently switching operations occur, e.g. involving larger mo-
tors (from approx. 30 kW). The overvoltage limiting module is mandatory if the
NE module is to be used in conformance with UL.
For NE modules from 10 kW and higher (100 mm wide), the overvoltage limiting
module can be inserted at interface X181.
For the 5 kW overvoltage limiting module, an appropriate protective circuit is
already integrated as standard.
Note
It is absolutely necessary to use the overvoltage limiting module:
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Table 7-3
Max. energy absorption
Weight
Dimensions (H x W x D)
Power module depth with overvoltage limiter module
Order number
Rated conditions
The following operating conditions apply:
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© Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
7.1 Line supply connection conditions for line supply infeed
For line supplies in which higher power loads are directly connected
(depending on the line supply stiffness and extent of the line supply, already
necessary from 20 kW and above), and if
Line supplies, that do not reliably fulfill the line supply specifications
according to IEC–/EN 61000–2–4.
Technical specifications
A voltage limiter must be used when transformers are used in front of the
NE module.
This limits the voltage for overvoltage condition caused by switching opera-
tions, when the line supply frequently fails, for arcing etc.
Plants and systems that are to fulfill UL/CSA requirements must be
equipped with overvoltage limiter modules.
To protect the devices against line–side overvoltages, it is recommended
that an overvoltage protection device is used directly at the supply point, in
front of the main switch. In order to comply with the requirements of CSA
C22.2 No. 14–05, an overvoltage protection device is absolutely mandatory.
For suitable surge arresters, refer to www.raycap.com for example
www.raycap.com.
7 Line Supply Connection
100 Joule
approx. 0.3 kg
76 mm x 70 mm x 32.5 mm
325 mm
6SN11 11–0AB00–0AA0
7-203
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