ABB REX 521 - Measurement Cubicle, High H06; Features

226
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
11.6. Measurement cubicle, High H06
11.6.1. Features
This application example describes a measurement cubicle in a single busbar system
including:
• Overvoltage protection
• Undervoltage protection
• Residual voltage protection
• Underfrequency protection with two stages
The network is either compensated or isolated. The residual voltage is measured
with a set of voltage transformers in an open-delta connection. Phase-to-phase
voltage measurements are established with voltage transformers.
Fig. 11.6.1.-1 H06 is used for protection, measuring and supervision in a
measurement cubicle in a single busbar system. The supplying
network is either compensated or isolated.
Application Example 13
REX 521 H06
f<
81U
3U< 27
3U>
59
59N
U >
0
UserMeasH06
TCS
0
I
MCS
000
R
3U~harm
f
3U
U
0