Square D Digest 179

PowerLogic ™ P Series Protection Relays

PowerLogic P3 Applications

www.se.com/us

PowerLogic P3 Applications

Table 5.7: Protection Functions Protection functions

Standard (P3U)

Advanced (P3x)

ANSI code

P3U20

P3U30

P3F30

P3L30

P3M30

P3M32

P3G30

P3G32

P3T32

Distance

21

— — — — — — — — —

— —

— —

1

— — — —

— — — —

—

—

— — —

Under-impedance

21G

—

2

2

Fault locator Overfluxing

21FL

1

1

1

—

—

24 25 27

—

—

—

1 2 3 2 1 2

1 2 3 2 1 2

1 2 3

Synchro-check Undervoltage

2 3

2 3

2 3

2 3

2 3

Positive sequence undervoltage 27P

— —

— —

— —

— —

— —

— —

Stator ground-fault detection Directional active underpower

27TN/64G

32 37

2 1

2

2

2 1

2 1

2

Phase undercurrent Temperature monitoring

1

—

—

—

—

—

38/49T

12 [12][13]

12 [12]

12 [12]

12 [12]

12 [12]

12 [12]

12 [12]

12 [12]

12 [12]

Loss of field

40

— —

— —

— — —

— — —

— —

— —

1 2 2

1 2 2

— —

Under-reactance

21/40

Negative sequence overcurrent (motor, generator) Current unbalance, broken conductor Incorrect phase sequence Excessive start time, locked rotor

46

2

2

2

2

2

46BC

—

—

1

1

—

—

—

—

—

47

1 1 1 3 5 1 1 2

1 1 1 3 5 1 1 2 1 3 3 1 1 1 4 3 1 1

— —

— —

1 1 1 3 5 1 1 2 2 1 1 1 4 3 1 1 3

1 1 1 3 5 1 1 2 2 1 1 1 4 3 1 1 3

— —

— —

— —

48/51LR

Thermal overload Phase overcurrent

49

1 3 5 1 1 2 1 3 1 2 1 1 4 3 1 1 1

1 3 5 1 1 2 1 3 1 2 1 1 4 3 1 1 1 1 2 1 2 8 8 1 3 4 5

1 3 5 1 1 2 1 3 2 1 1 1 4 3 1 1 1

1 3 5 1 1 2 1 3 2 2 1 1 4 3 1 1 1

1 3 5 1 1 2

50/51

Ground fault overcurrent

50N/51N

Breaker failure

50BF 50HS

Switch On To Fault (SOTF) Capacitor bank unbalance Voltage dependant overcurrent

51C 51V

— — —

—

—

—

Overvoltage

59

3

Capacitor overvoltage

59C 59N

—

—

—

—

—

—

Neutral voltage displacement

3 1

2 2 1

CT supervision VT supervision

60

60FL

— —

Stator ground fault

64S

—

— —

— —

—

—

— —

Frequent start inhibition

66 67

1

—

—

Directional phase overcurrent Directional ground-fault o/c Transient intermittent Magnetizing inrush detection Fifth harmonic detection

—

4 3 1 1

67N 67NI 68F2 68H5 78PS

3

—

—

—

—

—

—

—

1 1

Poleslip

— — — — — — — — 1

— —

—

—

— —

— —

— —

Auto-recloser

79 81

5

—

—

Over or under frequency Rate of change of frequency

2/2

2/2

2/2

2/2

2/2

2/2

2/2

2/2

81R 81U 87L 87M 87T 86

1 2 1

1 2 1

1 2 1

1 2 1

1 2 1

1 2 1

1 2 1

Under frequency

Lockout

Line differential Machine differential Transformer differential Programmable stages Arc-flash detection stages

— — —

— — —

— — —

—

— — —

—

— —

— —

2

2

—

—

2 8 8 1 3 4

99 — — — —

8

8

8 8 1 3 4

8 8 1 3 4

8 8 1 3 4

8 8 1 3 4

8 8 1 3 4

—

—

Cold load pick-up

1 3 4

1 3 4

Programmable curves

Setting groups [14]

5 PROTECTION, CONTROL, AND ENERGYAUTOMATION

Table 5.8: Control Functions Control functions Switchgear control and monitoring

Standard (P3U)

Advanced (P3x)

P3U20

P3U30

P3F30

P3L30

P3M30

P3M32

P3G30

P3G32

P3T32

1/6

6 2 ● ● ● ● 2 ● ●

6 2 ● ● ● ● 2 ● ●

6 2 ● ● ● ● 2 ● ●

6 2 ● ● ● ● 2 ● ●

6 2 ● ● ● ● 2 ● ●

6 2 ● ● ● ● 2 ● ●

6 2 ● ● ● ● 2 ● ●

6 2 ● ● ● ● 2 ● ●

Switchgear monitoring only Programmable switchgear interlocking

2 ●

Local control on single-line diagram ●

Local control with O/I keys

● ● 2 ● ●

Local/remote function

Function keys

Custom logic (logic equations) Control with Smart application

[12] Using external RTD module [13] 12 optional temperature sensors for P3U20 [14] Not all protection functions have 4 setting groups. See details in the manual.

5-7

© 2024 Schneider Electric All Rights Reserved