Pulsed Resistor Module And Unregulated Line Supply Infeed With Pulsed Resistor - Siemens SIMODRIVE 611 digital Configuration Manual

6 Infeed Modules
6.7 DC link options
6.7.3 Pulsed resistor module and unregulated line supply infeed with
pulsed resistor
6-188
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The pulsed resistor module (PR module) protects the DC link from overvoltage,
which, for example, would occur for UI modules when braking or for I/R modules
when the power fails when stopping. The possible braking power of the total
system can be increased by using one or more pulsed resistor modules.
The pulsed resistor module can be used to quickly discharge the DC link.
If the pulsed resistor (PR) module is supplied from a monitoring module, the
electronics power supply must be implemented with a 3–phase AC supply
system. Fast discharge is not possible if the electronics power supply is exclu-
sively implemented through the DC link (P500/N500).
If heat–sensitive components, e.g. cable ducts, are located above the module
with a clearance < 500 mm, then an air baffle plate must be provided
(Order No. 6SN1162–0BA01–0AA0).
As a result of the universal housing design of the pulsed resistor module, this
can be used both for internally as well as externally cooled module groups.
The UI and PR modules are equipped with a switch–on time monitoring; this
protects the pulsed resistor from overheating.
Table 6-17 Technical data, PR module
Rated supply voltage
Continuous power/peak pow-
er/energy
Permitted load cycle, refer to
Section 6.7.5
Weight
Module width
Order number
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
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600/625/680 V DC
S
with internal pulsed resistor
P = 0.3/25 kW; E = 7.5 kWs
S
with an external pulsed resistor module
P = 1.5/25 kW; E = 13.5 kWs
approx. 5 kg
50 mm
6SN11 13–1AB01–0AA1
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