NC1V-2131-1AM 데이터 시트보기 (PDF) - Unspecified

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NC1V-2131-1AM

NC1V Circuit Protectors

Unspecified 

NC1V Circuit Protectors

Time Delay Curve and Ambient

Temperature

NC1V circuit protectors employ an electromagnetic tripping

system, where the rated current (trip current) is not affected

by ambient temperatures. But the time delay may vary with

the oil viscosity in the oil dash pot. Lower oil viscosity at

higher temperatures results in a shorter delay, whereas at

lower temperatures the delay will be longer.

Temperature Correction Curve

The time delay curves on the preceding page are measured

at 40°C. With reference to the following curves, time delays

can be corrected according to ambient temperature.

600

500

400

300

200

100

80

60

40

-20 -10 0 10 20 30 40 50 60 70

Ambient Temperature (°C)

The time delay is based on an ambient temperature of

40°C. Time delays at other temperatures are corrected

according to the temperature correction curve. The time

delay of the instantaneous time delay curve (S) is not

affected by the ambient temperature.

When operating temperature

exceeds 40°C, derate the rated

current by multiplying the derating

factor shown on the right.

Operating

Temp.

50°C

55°C

60°C

Derating

Factor

0.9

0.8

0.7

Inertia Delay

Inertia delay is designed not to trip on a non-repeating

single pulse of 20 times the rated current (peak value) for a

duration of 8 ms. In addition, circuit protectors equipped

with inertia delay do not respond to high inrush currents

caused by transformer or lamp loads, but perform the

specified interruption on the subsequent overcurrents.

Inertia delay is available on AC circuits, and is not available

with the series trip curve S (instantaneous).

12000

10000

8000

1. Percent of rated current

Pulse peak current

Protector rated current

×100

2. Sinusoidal or parabolic pulse

Pulse peak current

Pulse width (Duration)

6000

4000

2000

1

2

3

4

5

6

7

8

9

10

Pulse Width (ms)

Impedance and Coil Resistance

• Series Trip (Current Trip)

at 25°C

Rated

Current

For AC 50/60 Hz

Impedance (Ω)

Curve S Curves A, M

0.1A

66.0

116.0

0.3A

6.6

11.0

0.5A

1.92

3.65

1A

0.50

0.93

2A

0.16

0.27

3A

0.07

0.12

5A

0.025

7A

0.014

10A

0.007

15A

0.006

20A

0.005

25A

0.004

30A

0.003

0.050

0.027

0.021

0.010

0.006

0.005

0.004

Tolerance: ±25% (up to 20A),

±50% (25A and 30A)

For DC

Resistance (Ω)

Curve S Curves A, M

43.0

106.0

4.1

10.0

0.86

3.40

0.25

0.90

0.11

0.25

0.050

0.11

0.015

0.045

0.011

0.025

0.005

0.020

0.005

0.009

0.004

0.005

0.004

0.005

0.003

0.004

• Relay Trip (Voltage Trip)

Tripping Voltage

24-48V

Tolerance: ±25%

For DC

Resistance (Ω)

100.0

at 25°C

Voltage Drop Due to Coil Resistance or Impedance

The internal resistance or impedance of a circuit protector

tends to be larger for a smaller rated current. Therefore,

when circuit protectors of a small rated current are used,

voltage drop should be taken into consideration. Internal

resistance also varies with time delay curves, which should

also be considered during installation.

8

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