Signals; Settings - ABB 615 series Technical Manual

1MAC059074-MB A
4.2.7.6
4.2.7.7
Table 409: 27/59THN Group settings (Basic)
Parameter Values (Range)
Beta 0.50...10.00
Voltage N 3.H Lim 0.005...0.200
Trip delay time 20...300000
615 series ANSI
Technical Manual
1. For a particular value of Beta the third harmonic neutral voltage is measured with the
generator in the no-load condition and the circuit breaker in the closed position.
2. With the same condition, the third harmonic neutral voltage with the circuit breaker
in the open position is measured.
3. CB Open factor should be set equal to the ratio of the third harmonic neutral voltage
measured with the circuit breaker in the closed position to that in the open.

Signals

Table 407: 27/59THN Input signals
Name Type
V_3H_A SIGNAL
V_3H_B SIGNAL
V_3H_C SIGNAL
V_3H_N SIGNAL
V_3H_RES SIGNAL
BLOCK BOOLEAN
GCB_CLOSED BOOLEAN
Table 408: 27/59THN Output signals
Name Type
TRIP BOOLEAN
PICKUP BOOLEAN
INT_BLKD BOOLEAN

Settings

Unit Step
0.01
xUn 0.001
ms 10
Default Description
0 Third harmonic of phase A voltage
0 Third harmonic of phase B voltage
0 Third harmonic of phase C voltage
0 Third harmonic of neutral voltage
0 Third harmonic of residual voltage
0=False Block signal for activating the blocking mode
0=False Generator CB in closed position
Description
Trip
Pickup
Protection internally blocked
Default Description
3.00 Portion of neutral side 3rd harmonic used as
bias
0.010 Pickup value for 3rd harmonic residual
undervoltage protection
20 Trip delay time
Section 4
Protection functions
435