Reverse-Power Protection
Overview of Functions
The Reverse-power protection function (ANSI 32R):
•
Monitors the motor operation of generators and thus detects driving-power failure
•
Prevents endangering the turbine (e.g. the turbine-blade damage due to overheating) by opening the
circuit breaker of the system
•
Protects a turbo-generator set
For the generator, there is a danger that the turbo-generator set accelerates and reaches overspeed in case of
an incorrect residual-steam passage (quick-stop valves defective) after the circuit breaker has opened. Conse-
quently, disconnecting the system (opening the circuit breaker of the system) shall only occur after reverse
power (active-power consumption) has been detected.
Structure of the Function
The Reverse-power protection function comes factory-set with 1 stage. A maximum of 2 stages can be oper-
ated simultaneously within the function.
In all function groups, the function works with a 3-phase voltage and current interface.
[dw_RPP structure, 3, en_US]
Figure 6-235 Structure/Embedding of the Function
6.38
6.38.1
6.38.2
Protection and Automation Functions
6.38 Reverse-Power Protection
SIPROTEC 5, Overcurrent Protection, Manual 809
C53000-G5040-C017-8, Edition 07.2017
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