Signals; Settings - ABB RELION 620 Series Technical Manual

1MAC504801-IB E
4.2.4.6
4.2.4.7
Table 239: 47 Group settings
Parameter Values (Range)
Pickup value 0.010...1.000
Trip delay time 40...120000
Table 240: 47 Non group settings
Parameter Values (Range)
Operation 1=enable
5=disable
Reset delay time 0...60000
620 series ANSI
Technical Manual
If the machines have an unbalance protection of their own, the 47 operation can be applied
as a backup protection or it can be used as an alarm. The latter can be applied when it is
not required to trip loads tolerating voltage unbalance better than the rotating machines.
If there is a considerable degree of voltage unbalance in the network, the rotating
machines should not be connected to the network at all. This logic can be implemented by
inhibiting the closure of the circuit breaker if the 47 operation has started. This scheme
also prevents connecting the machine to the network if the phase sequence of the network
is not correct.
An appropriate value for the setting parameter Voltage pickup value is approximately 3
percent of V . A suitable value for the setting parameter Trip delay time depends on the
n
application. If the 47 operation is used as a backup protection, the trip time should be set
in accordance with the trip time of 46 used as the main protection. If the 47 operation is
used as the main protection, the trip time should be approximately one second.

Signals

Table 237: 47 Input signals
Name Type
V SIGNAL
2
BLOCK BOOLEAN
Table 238: 47 Output signals
Name Type
TRIP BOOLEAN
PICKUP BOOLEAN

Settings

Unit Step
xVn 0.001
ms 1
Unit Step
ms 1
Default Description
0 Negative phase sequence voltage
0=False Block signal for activating the blocking mode
Description
Trip
Pickup
Default Description
0.03 Pickup value
40 Trip delay time
Default Description
5=disable Operation Disable / Enable
20 Reset delay time
Section 4
Protection functions
289