Siemens 7SA511 manual Test Equipment, Rated Voltage, Inrush peak

7SA511 Line Protection Relay Acceptance Tests

The acceptance tests described in the rest of this chapter verify the following are working:

Power supply

Metering capabilities

Fault detection systems

Overcurrent

-Voltage-controlled overcurrent (7SA511*-*CA52/3-****)

Polygonal impedance (7SA511*-*CA52-****)

Distance zone schemes

Pilot protection signal transmission functions

Ground fault detection for ungrounded systems (7SA511*-*CA5*-1***)

High-resistance ground fault protection for grounded systems (7SA511*-*CA5*-0/2**2/3)

Automatic reclose (model number 7SA511*-*CA5*-**B/C/F/G*) Power swing function (model number 7SA511*-*CA52-***1/3) Binary inputs and LED operations

Output contacts (signal and trip relays)

3.1 Test Equipment

You will￿need the following items to perform the acceptance tests:

DC power supply, 20W nominal minimum with a 1 millisecond peak load capability as indicated in Table 3-1.

Table 3 1. Power Supply Rated Voltage (VDC) by Relay Model Number

Relay Model Number

7SA511*-2*A5*-****

7SA511*-4*A5*-****

7SA511*-5*A5*-****

Rated Voltage

24/48 VDC

60/110/125 VDC

220/250 VDC

Inrush (peak)

100A

50A

25A

Note: See section 1.3, “Relay Model Number,” for more information on how to read and interpret the relay model number.

Timer with electrical start/stop contacts

Multimeter

￿DC voltage source adjustable between 0 V and 30 V

Combination three-phase AC 60 Hz current and voltage source with adjustable: Voltage between 0 V and 100 V

-Current between 0 A and 20 A

Phase angle between voltage and current of 0￿to 90￿

Note: Commercial test sets that include some or all of the above test tools are available and can be used in the following tests.

3-4 July 27, 1995