Eaton Industrial Switchgear - XEnergy XPole Energy distribution, switching and protection

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18/92 IZM circuit-breakers, IN switch-disconnectors

Selectivity: incoming circuit-breaker, outgoing circuit-breaker

2010 CA08103002Z-EN

Selectivity: incomingcircuit-breaker,outgoingcircuit-breaker

I

n

: Rated operational current

I

u

: Rated uninterrupted current

I

cu

: Rated short-circuit breaking

capacity

I

i

: Set value non-delayed short-

circuit releases

Selectivity 415 V AC

between circuit-breakers enables the

separate isolation of faulty system

sections.

Selectivity exists between incoming

circuit-breaker 1 and outgoing circuit-

breaker 2 if, only outgoing circuit-

breaker 2 trips at position 2 during a

short-circuit.

System sections 3 and 4 remain

operational.

Selection:

Provided that the short-circuit current does not exceed those values

specified (I

cc rms

).

These details represent the limits of selectivity.

Both circuit-breakers will switch off with higher short-circuit

currents.

On IZM circuit-breakers with V, U, P releases, the delay time t

sd

must

be at least 100 ms longer than the delay time of the next downstream

levels (2, 3, 4).

Incoming circuit-

breaker (1)

IZM...20-A

IZM...20-V

I

n

[A]

800 800 1000 1000 1250 1250 1600 1600 2000 2000 800 800 1000 1000 1250 1250 1600

I

cu

[kA] 50 65 50 65 50 65 50 65 50 65 50 65 50 65 50 65 50

I

i

[A]

8000 8000 10000 10000 12500 12500 16000 16000 20000 20000 11200 11200 14000 14000 17500 17500 19200

Outgoing circuit-

breaker (2)

I

u

[A]

I

cu2(415V)

[kA]

B N B N B N B N B N B N B N B N B

Prospective short-circuit current (I

cc rms

in kA)

Prospective short-circuit current (I

cc rms

in kA)

NZMB(C)(N)(H)1-A(M)… 20 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

25 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

32 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

40 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

50 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

63 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

80 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

100 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

125 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

160 25 - 100 9

9

15 15 T(25) T(25) T T(50) T T T T T T T T T

NZMB(C)(N)(H)

2-A(M)(V)…

20 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

25 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

32 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

40 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

50 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

63 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

80 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

90 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

100 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

125 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

140 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

160 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

200 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

220 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

250 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

300 25 - 150 10 10 18 18 T(30) T(30) T T T T T T T T T T T

NZMC(N)(H)3-A(M)(V)… 220 36 - 150 7

7

9

9

12 12 18 18 25 25 T T T T T T T

250 36 - 150 7

7

9

9

12 12 18 18 25 25 T T T T T T T

320 36 - 150 7

7

9

9

12 12 18 18 25 25 T T T T T T T

350 36 - 150 7

7

9

9

12 12 18 18 25 25 T T T T T T T

400 36 - 150 7

7

9

9

12 12 18 18 25 25 T T T T T T T

450 36 - 150 7

7

9

9

12 12 18 18 25 25 T T T T T T T

500 36 - 150 7

7

9

9

12 12 18 18 25 25 T T T T T T T

630 36 - 150 7

7

9

9

12 12 18 18 25 25 T T T T T T T

NZMN(H)4-A(M)(V)… 550 50 - 100 7

7

9

9

12 12 15 15 18 18 T T T T T T T

630 50 - 100 7

7

9

9

12 12 15 15 18 18 T T T T T T T

800 50 - 100 -

-

9

9

12 12 15 15 18 18 -

-

T T T T T

875 50 - 100 -

-

9

9

12 12 15 15 18 18 -

-

T T T T T

1000 50 - 100 -

-

-

-

12 12 15 15 18 18 -

-

-

-

T T T

1250 50 - 100 -

-

-

-

-

-

15 15 18 18 -

-

-

-

-

-

T

1400 50 - 100 -

-

-

-

-

-

15 15 18 18 -

-

-

-

-

-

T

1600 50 - 100 -

-

-

-

-

-

-

-

18 18 -

-

-

-

-

-

-

Notes

B = Basic switching capacity, N = Normal switching capacity, H = High switching capacity, T = Total selectivity

2

1

3 4

IZM20...