Overvoltage Limiting Module - Siemens SIMODRIVE 611 Planning Manual

2 System Configuration
2.7 Infeed modules
2.7.4
2
Application
Application
conditions
Mounting
2-44

Overvoltage limiting module

The overvoltage limiting module limits the overvoltage, e.g. caused by
switching operations at inductive loads and at line supply matching transfor-
mers, to acceptable values.
For line supply infeed modules above 10 kW (100 mm wide), the overvoltage
limiting module can be inserted at interface X181.
The overvoltage limiting module is used if upstream transformers are used, or
for line supplies which are not in conformance with IEC (unstable line supplies).
For the 5 kW monitoring module, an appropriate protective circuit is already
integrated as standard.
The following application conditions apply:
S
Voltage limiting must be provided when using transformers in front of the
NE module.
S
As voltage limiting due to switching overvoltages, for frequent power failures,
for arcing etc.
S
Systems, which should fulfill UL/CSA requirements, must be equipped with
overvoltage limiting modules.
1. Power–down the equipment and bring it into a no–voltage condition.
2. Withdraw connector X181 from the NE module.
3. Insert the overvoltage limiting module up to its endstop in plug connector
X181.
4. Insert connector X181 on the overvoltage limiting module.
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
05.01