Braking Resistors; Description - Siemens Sinamics S120 Manual

Braking resistors

9.1

Description

A braking resistor is used to dissipate the excess DC link energy in generator operation. The
braking resistors can be connected to a Braking Module or directly to a 20 kW or 40 kW
Basic Line Module.
Resistors with and without a thermostatic switch are available with various rated powers. The
thermostatic switch monitors the braking resistors for overtemperature and issues a signal at
an isolated contact if the limit value is exceeded.
Table 9- 1 Assignment of braking resistors
Braking resistor
Braking resistors without a thermostatic switch
6SN1113-1AA00-0DA0
Resistance: 17 Ω
P : 0.3 kW
N
6SL3100-1BE31-0AA0
Resistance: 5.7 Ω
P : 1.5 kW
N
Braking resistors with a thermostatic switch
6SE7018-0ES87-2DC0
Resistance: 80 Ω
P : 1.25 kW
N
6SE7021-6ES87-2DC0
Resistance: 40 Ω
P : 2.5 kW
N
6SE7023-2ES87-2DC0
Resistance: 20 Ω
P : 5 kW
N
6SE7028-0ES87-2DC0
Resistance: 8 Ω
P : 12.5 kW
N
Installation
The braking resistors can be installed standing on the floor of the control cabinet or
suspended. You must ensure that the braking resistors do not obstruct the flow of cooling air
to the drive line-up.
Positioning the braking resistor outside the control cabinet or switchgear room enables the
resulting thermal losses to be routed away. This reduces the level of air conditioning
required.
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
Braking Module Braking Module
Booksize Booksize Compact
X
X
Basic Line Module 20
kW
X
X
X X
X X
X X
9
Basic Line Module 40
kW
X
X
X
X
577