Braking Resistor Unit (Bru); Figure 3-15 Typical Bru; Table 3-1 Overview Of Available Brus - ABB PCS6000 User Manual

3.2.6. Braking resistor unit (BRU)

The braking resistor is able to dissipate the full generator power (plus temporary
overproduction and DC-Link discharge) in any operating condition for a certain time.
The power switching to the braking resistor is done by a Voltage Limiting Module (VLM).
The braking resistor is modular for different converter power ranges.
The BRU can be placed somewhere close to the converter. A roof installation is possible. The
maximum cable length between converter and BRU is 10 m.
The monitoring/control of the BRU resistor temperature is done with a temperature model
on the main circuit interface.
The BRU varies depending on converter size and application.
Table 3–1 Overview of available BRUs
BRU type Thermal capacity
BRU51 2 × 7.5MJ
BRU52 2 × 7.5MJ
BRU72 2 × 15MJ
Figure 3–15 Typical BRU
PRODUCT
PCS6000
Characteristics
2x1.8 Ohm / stand-alone / cable clamp DI 28 mm
2x1.8 Ohm / roof mounting / cable clamp DI 40 mm
2x1.5 Ohm / stand-alone / cable clamp DI 28 mm
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS600000 E40
PRODUCT DESCRIPTION
REV. LANG. PAGE
G en 39/114