Siemens 7SA511 manual IEC Ansi

7SA511 Line Protection Relay Acceptance Tests

3. Acceptance Tests

This section provides acceptance test procedures. Follow these procedures carefully to avoid possible injury and equipment damage. When testing the 7SA511 relay, you should be familiar with all applicable safety regulations from ANSI, IEC, NEC, and other pertinent standards.

Be sure that you are using the correct tests for your relay configuration. If a test is not applicable to your relay model number and configuration do not attempt to perform the test.

In the following chapters, the protection functions provided by the relay are referenced with the IEC designations shown in the list below. This nomenclature is used in the text, the tables and the LCD. The corresponding ANSI designations are also indicated.

IEC	ANSI
I>>	50H/51H	High-set emergency overcurrent protection element for
		phases
I>	50/51	Definite time emergency overcurrent protection element for
		phases
IE>	50G/51G/67G	Time overcurrent element for high-resistance ground fault
		protection in grounded systems
VE>		Displacement voltage threshold for isolated ground fault
		detection
AR	79	Automatic reclose
	47	Phase sequence check
	21	Distance protection with:
Iph>>		- Overcurrent fault detection
V</I>		- Voltage-controlled overcurrent fault detection
Z<		- Impedance fault detection
	85	Pilot protection
	78	Power swing/out-of-step protection

For information on relay mounting and connection options, refer to the “Installation” section.

July 27, 1995 3-3