Siemens 7SA511 manual Setting at Address, Putt Mode Action Zone Expected Result, Pott Mode

7SA511 Line Protection Relay Acceptance Tests

Table 3-24. Testing Permissive Underreach Transfer Trip (PUTT).

Setting at Address 2102

Z1B

ACCELERATION

FD ACCELERATION

PUTT Mode	Action (Zone)	Expected Result
Permissive Under-	Simulate a short circuit	Trips after T1B delay when the release
reach Transfer Trip	in zone Z1B, but beyond	signal is received or, without received
in Zone Z1B	zone Z1.	signal, after T1 delay
Permissive Under-	Simulate a short circuit	Trips immediately when the release
reach Transfer Trip	in zone Z1.	signal is received or, without received
by Fault Detection		signal, after T1 delay

3.12.2 Permissive Overreach Transfer Trip (POTT)

Before beginning this test, you must check the setting at address 2202 to determine the requirements for the test. Table 3-25 identifies, based on the setting at address 2202, the action required to check the transmission signal.

Table 3-25. Testing the POTT Transmission Signal.

Setting at Address 2202

Z1B RELEASE or

Z1B UNBLOCK

FD DIREC RELEASE or

FD UNBLOCK

￿Z1B BLOCKING or

PILOT WIRE COMP

POTT Mode

Release modes in zone Z1B.

Directional comparison release fault detection, or unblocking mode with directional fault detection.

Blocking mode with zone Z1B, or comparison via pilot wires with zone Z1B.

Action

Simulate a short circuit in zone Z1B.

Simulate a short circuit in the forward Fault Detection zone

Simulate a short circuit in the reverse direction.

Expected Result

Transmitting relay closes its transmit contact (factory preset is Relay 1).

Transmitting relay closes its transmit contact (factory preset is Relay 1).

Transmitting relay closes its transmit contact (factory preset is Relay 1).

To check the receiver, a short circuit is simulated as indicated in Table 3-26. The binary input with function >Dis.Recept. (FNo 082) assigned (factory preset is Binary Input 5) must be activated simultaneously with simulation of the fault.

3-26 July 27, 1995