O ctober, 1 97 7
Su persedes Di mension Sheet 29- 1 70
all previous issues.
M a i led to: E, D, C/ 1 901 , 1 928, 1 929/ P L
Westi nghouse E l ectric Co rpo ration
Low Voltage Breaker D ivision
Beaver, Pen nsylvania 1 5009
Types E B, E H B, F B , M A R K
75®
H F B
Page 1 9: Outline D i mensions
Page 20: Drilling Plans
D i mension S heet
29-1 70
Page 1 9
AB DE-ION®
Circuit Brea kers
Type E B , E H B, FB and M A R K 75 H FB
1 ,
2, 3, 4 Pole Thermal Mag netic Breakers ( See N ote Below)
A Diameter Hole
1�
Deep
Accepts
#6
Thread
Cutt1
ng
Screw
�
Inch Wtde Conductor w1th
f2
D•ometer Hole
z:i
5
64
� Inch W1de
Conductor with
}2
D1a Hole
Load End
2 and 3 Pole FB and H F B Magnetic Only B reakers
C urrent carrying parts are omitted from center pole for 2-pole b reakers .
1�D•ameter Hole �2D•ometer Counter bore � Deep from Top,
�2 D•ometer Counterbore �2 Deep from Bottom
Note:
M a rk 75 H F B Thermal Magnetic Breakers
rwo-pole breakers are furnished in t hree-pole frame
with current carrying parts omitted from center pole.
Line End
;jx � Copper Bars for
15
toiOOAmp
5,k
�X�Copper Bars for
1
2
5
o
n
d
I
50
Amp
Bars May be Rotated
90°
� Inch W•de Conductor
w•th
f2
D•ameter Hole
u ,
5�
zl
31
8
I
8
72
Support Blocks for Line and Load Ends are not Supplied with Breaker and M ust be
Ordered Separately. Refer to Drawing 506CI44 When Ordering Support Blocks
All Parts Necessary to Convert a Standard Breaker are Included.
Plug-In and Bolt-On Detail
Support
St
b
Breaker
Conductor
:
.- v •
,<'·,
·.::"Y
',',,','·,:,·-:-:
Plug-in
Bolt stab to breaker
conductor, then plug
into support block
Bolt-on
Reproduced F rom Drawing 4967020, 4967030, 4985060 and 4979066
Block
�
-
"
·
°
Conductor
Bolt stab to support
block, then bolt sup
port block assembly to
breaker conductors.
www
. ElectricalPartManuals
. com
