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8

Characteristics and Outline Dimensions Molded Case Circuit Breakers

S250-NF, S250-GF Time/Current characteristic curves

S250-NF

S250-GF 4

250

2* 3

4

250

minute

2* 3

hour

Ratings and Specifications Type Number of poles ■Ratings Rated current, A Calibrated at 40°C

(250A Frame)

3 2 1 40 30 20 10 6 4 2

Externally mounted

Min.

1 0.6 0.4

Magnetic trip setting 800%–1200%

0.2 0.1 0.06 0.04 0.02

' ○(BAR) ― ○ ○ ― ― ―

' ○(BAR) ― ○ ○ ― ― ―

● ● ● ― ● ● ● ● ● ● ● ●③ ● ●

● ● ● ― ● ● ● ● ● ● ● ●e ● ●

Thermal-magnetic Yes (Red) Yes Yes

Thermal-magnetic Yes (Red) Yes Yes

Ambient Compensating Curves 140

Calibrated temperature

130 120 110 100 90 0

10

20

30

Poles

Auxiliary switch

Alarm switch

3 ・ 4

Toggle

187

SH Shunt trip

Left pole Right pole

UV Under voltage trip

AX

AL

40

Ambient temperature (°C)

Combinations of Internally Mounted Accessories(Optional) AL

AX

SH

AX

UV

AL

SH

AL

UV

AX

AX

AL

AL

SH

UV

50

8000

3000 4000 5000

Percent Rated Current

Notes: ' : Standard. This configuration used unless otherwise specified. ○ : Optional standard. Specify when ordering. ● : “yes” or “available”. ― : “no” or “not available”. 1 : DC rating available on request. 3 : Line side interpole barriers are supplied as standard. (Front connection only)

AX

1500 2000

0.005

700

0.01

1.9

1000

1.9

2

300 400 500

7.5/7.5 25/25 50/25 65/35 65/35 85/85 40/40 40/40 ― 1.5 1.5

Tripping Time

7.5/7.5 25/25 25/25 35/35 35/35 65/65 40/40 40/40 − 1.5 1.5

10 6 4

200

■Rated short time withstand current, kA Weight (' marked standard type) kg ■Connections and Mountings Front-connected (FC) Terminal screws With extension bars Rear-connected (RC) Bolt studs Flat bar studs Plug-in (PM) Draw-out type (DR) DIN rail mount Clip-in chassis mount ■Accessories (optional) Symbol Motor operator MC External operating Breaker-mounted HB handle Door-mounted (variable depth) HP Toggle extension HA Mechanical interlock Slide type MS Link type ML Wire type MW Toggle holder HH Toggle lock HL Terminal cover For front-connected CF For rear-connected and plug-in CR Interpole barrier BA Terminal block for lead TF Door flange DF ■Standard specifications Overcurrent trip mechanism Trip button (color) Handle position indication (ON: Red, OFF: Green) Suitability for isolation

690 8

Max.

100 125

690V 500V 440V 415V 380V 240V 250V 125V

690 8

Percent current rating

q DC

AC

second

Rated insulation voltage〔Ui〕 V Rated impulse withstand voltage 〔U imp〕 kV ■Rated breaking capacity, kA IEC60947-2 AC Icu/Ics(sym)

1 40 30 20


H L : Handle Frame Centre Line

ASL : Arrangement Standard Line

C L : Handle Centre Line

S250-NF, S250-GF

Outline dimensions (mm) Preparation of conductor ø9 100

Mounting hole H L

H L

98

98

24

M8screw

H L 120 97 23

25(max.) max.t7

With extension bars (optional)

23

Drilling plan (front view)

28 4 23 30.5

4P

10(max.)

3P Interpole barrier (removable)

11.5

Front-connected

3P H L

4P H L

35

35

C L M4✕0.7 Mounting screw

C L

C L

C L

22

35 105 140

45 61 68 92

8

8 ø11

23 35 35 35

4

11.5

70 105

30.5

19

22

126

C L

102 50

144 165

ø11

Conductor overlap, max

Rear-connected

Drilling plan (front view) 4P 3P H L

3P H L

Panel cutout (front view) 4P 3P H 52.5 L

4P ø24

H L

C L

R1

C L

20

8

Conductor 22 overlap, max

126 144

C L

52

144

6

Mounting plate (max. t3.2)

M4✕0.7 Tapped hole

28

ø9 68

15 71 106

15 Stud can be turned 45°or 90°

35 35 35

M4✕0.7 Mounting screw

35 35 35

50 100

35 M4✕0.7 35 35 35 Tapped hole

Panel cutout dimensions shown give an allowance of 1.0mm or more around the handle escutcheon.

Note: Studs are factory installed in horizontal direction both on the line and load sides.

24

M8 screw

70 H L

98

4P 105 35 H L

22(max.)

52.5

3P

4P

HL

HL

CL

CL

22

105

140

ø6

17.5 75 144

CL

108 180

165 180

200

35 CL

ø9

15

98

Mounting hole

3P

Conductor width, max.22

4P H L

Drilling plan (front view)

Preparation of conductor

50 37.5 15 75

3P H L

Mounting base (rear view)

15.5(max.)

27 5

15.5 (max.)

Detail of connecting part

Plug-in

116

27

105 M5✕0.8 Mounting screw

140

M8

15 35

17.5

15 70

Mounting plate

SECTION 8 188


s250nf-s250gf-cat