Siemens 7SA511 manual Power Swing Protection 2000 Optional, Phase Pref, L3L1 Acyclic

7SA511 Line Protection Relay Chapter 5

Table 5-17.Settings for Determination of the Fault Loop for Ungrounded Systems

Addr.

1801

1802

1803

LCD Text

TIe 1PHASE

Ue>

PHASE PREF

Description

Pickup delay for ground current detection with single phase pickup

Displacement voltage for ground fault detection

Phase preference for double ground faults—the preference sequence must be the same throughout the network

Preset

0.04 s

40 V

L3(L1) ACYCLIC

Options/Range

•0.04 - 0.50 s

10 V - 100 V

L1(L3) ACYCLIC L2(L1) ACYCLIC L1(L2) ACYCLIC L3(L2) ACYCLIC L2(L3) ACYCLIC

￿L3(L1) CYCLIC L1(L3) CYCLIC

5.11 Power Swing Protection (2000) (Optional)

Address block 2000 is used to program the power swing protection settings for the relay. This section applies only for relays with polygonal impedance fault detection (see section 0) and the power swing option, model number 7SA511*-**A52- ***1/3. Skip this section if your relay does not have this option.

Table 5-18 lists the presettings and setting options for power swing protection. Compare these presettings to the information on the completed worksheets and determine which settings, if any, you need to change to match your operating environment. When you have changed all the neces- sary settings, follow the procedure described in section 5.3.4 to save the new settings.

Prerequisite Settings:

Addr.	LCD Text
7801	DIST. PROT.
7802	DIST. F. DET.
7813	POWER
	SWING

Description

Distance protection function

Type of fault detection

Power swing protection func- tion

Setting

EXIST IMPEDANCE ZONE EXIST

July 27, 1995 5-33