SIPROTEC 4 7SA522 Distance Protection Relay for Transmission ...

More documents

Recommendations

Info

SIPROTEC 4 – 7SA522 Distance Protection Relay for Transmission Lines Dimension drawings Figure 47 Surface mounting 1/1 and 1/2 x 19’‘ 260 (10.24) 29.5 (1.16) 25 (0.98) 266 (10.47) 71 (2.80) 72 (2.83) 52 (2.05) Side view 240 (9.45) 219 (8.62) 10.5 (0.41) 51 75 101 465 (18.31) 444 (17.48) 150 10.5 (0.41) 76 100 151 200 225 (8.86) 280 (11.02) 320 (12.60) 344 (13.54) 450 (17.72) 280 (11.02) 320 (12.60) 344 (13.54) 1 25 1 50 9 (0.35) 26 50 9 (0.35) 51 100 Front view Housing 1/2 x 19’‘ Front view Housing 1/1 x 19’‘ Note: Dimensions are indicated in millimeters; values stated in brackets are inches 44 Siemens SIP 4.2 · 08/99
Appendix Explanation of ANSI numbers, IEC designation ANSI IEC ANSI Standard 7SA522 number 14 Underspeed device. A device that functions when the speed of a machine – falls below a determined value. 21 Distance relay. A relay that functions when the circuit admittance, impedance, or reactance increases or decreases beyond a predetermined value. Phase distance measurement 21N Ground distance measurement FL Fault locator 25 Synchronizing or synchronism-check device. A device that operates when two ac circuits are within the desired limits of frequency, phase angle and voltage to permit or cause the paralleling of these two circuits. Synchro-check function 27 27WI U< Undervoltage relay. A relay that operates when its input voltage is less than a predetermined value. 32 Directional power relay. A relay that operates on a predetermined value of power flow in a given direction or upon reverse power flow such as that resulting from the motoring of a generator upon loss of its prime mover. 33 Position switch. A switch that makes or breakes contact when the main device or piece of apparatus that has no device function number reaches a given position. 34 Master sequence device. A device such as a motor opoerated multicontact switch, or the equivalent, or a programming device, such as a computer, that establishes or determines the operating sequence of the major devices in equipment during starting and stopping or during other sequencial switching operations. 37 I< Undercurrent or underpower relay. A relay that functions when the current or power flow decreases below a predetermined value. 46 I2 Reverse-phase or phase-balance current relay. A relay that functions when the polyphase currents are of reverse-phase sequence or when the polyphase currents are unbalanced, or contain negative phase-sequence components above a given amount. 47 Phase-sequence or phase-balance voltage relay. A relay that functions upon a predetermined value of polyphase voltage in the desired phase sequence, when the polyphase voltages are unbalanced, or when the negative phase-sequence voltage. 48 Incomplete sequence relay. A relay that generally returns the equipment to the normal, or off, position and locks it out if the normal starting, operating, or stopping sequence is not properly completed within a predetermined time. 49 Machine or transformer thermal relay. A relay that functions when the temperature of a machine armature winding or other load-carrying winding or element of a machine or power transformer exceeds a predetermined value. 50 I>>, I> Instantaneous overcurrent relay. A relay that functions instantaneously on an excessive value of current 50N 3I 0 >>>, 3I 0 >>, 3I 0> 50N-2 3I 0 > 50BF 50HS 50 STUB 50N STUB 51 51N 51N-2 I ph I>>> I ph STUB 3I 0 STUB I p ,3I 0p 3I0p 3I 0p AC time overcurrent relay. A relay that functions when the ac input current exceeds a predetermined value, and in which the input current and operating time are inversely related d through a substantial portion of the performance range. 52 AC circuit breaker. A device that is used to close and interrupt an ac power circuit under normal conditions or the interrupt this circuit under fault or emergency conditions. 55 cos ϕ Power factor relay. A relay that operates when the power factor in an ac circuit rises above or falls below a predetermined value. Phase-Ground undervoltage in combination with Weak Infeed trip function – Application of programmable logic Application of programmable logic Application of programmable logic. Operating measured value and limit value module 1. Measured value supervision: current symmetry / balance 2. Application of programmable logic: Operating measured value and limit value module 1. Measured value supervision: voltage symmetry / balance 2. Application of programmable logic: Operating measured value and limit value module Application of programmable logic – Phase-overcurrent time protection as backup Ground overcurrent time protection (directional) Ground-overcurrent time protection as backup stage Breaker failure protection Instantaneous high speed s-o-t-f protection STUB-bus overcurrent stage, phase and ground Phase-overcurrent inverse time protection as backup Ground overcurrent inverse time protection (directional) Ground-overcurrent inverse time protection as backup stage – Application of programmable logic. Operating measured value and limit value module Siemens SIP 4.2 · 08/99 45
Page 1: SIPROTEC 4 7SA522 Distance Protecti
Page 4 and 5: SIPROTEC 4 - 7SA522 Distance Protec
Page 48 and 49: Appendix Explanation of ANSI number
Page 50 and 51: Siemens Companies and Representativ
Page 52 and 53: Responsible for Technical contents:

SIPROTEC 4 7SA522 Distance Protection Relay for Transmission ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?