Accessories S260, S270 & S280

14
em
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Accessories
S260, S270 & S280
Electrical
accessories
Catalog
number
List
price
Delivery
class
Suggested
order quantities
Wgt. oz.
(1 pc.)
Undervoltage release
For field mounting, left or right side
12 VDC
24 VAC/VDC
48 VAC/VDC
110 VAC/VDC
220 VAC/VDC
380 VAC
S2-BM1
S2-BM1
S2-BM2
S2-BM3
S2-BM4
S2-BM5
S2-BM6
216
A
1
5.2
When control voltage drops below approximately 50% of rated voltage, the S2-BM opens the breaker. The breaker can not be operated unless
proper control voltage is first applied to the UVR coil. Similar in size and mounting to the shunt trip accessory; can be left or right side mounted.
14
14.18
AC 1600 - 3/03
Low Voltage Products & Systems
ABB Inc. • 888-385-1221 • www.abb-control.com
14
Technical data
Mounting and operating instructions
Mounting
Operation
Universal mounting position using snap-on mounting
to standard 35x7.5mm DIN rail.
MCBs are switched on by moving the handle to the
upper position. Stamped onto the handle switch, a “I”
is visible confirming that the breaker is closed.
Miniature circuit breakers (MCBs) can also be
mounted to front of door using a panel cut-out with
breaker handle protruding through panel opening for
external operation. Special front mounting kit type
ME is available (see page 2.12).
Mounting MCB
Sy
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Pr tem
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M
Connection
Terminals are suitable for solid or flexible conductors
from 18 to 4 AWG (0.75 to 25mm2) with no busbar
connected. When maximum busbar size of 36 mm2
is used, maximum cable is 6 AWG (16 mm2).
Maximum tightening torque of 17.5 in-lb (2 Nm)
for line/load terminals and 4.5 in-lb (0.5Nm) for
accessory device terminals.
The MCBs are “trip-free,” if the handle is being
forced to the “ON” position, the breaker will still trip
under fault conditions.
The “O” marking indicates that the breaker is in the
“OFF” position. The MCB is now open and the load is
disconnected from line power.
When a breaker has tripped, the MCB handle should
first be set to the full “OFF” position to make certain
the trip mechanism has been reset. Once the fault
has been determined and cleared the MCB can
again be switched “ON”.
Maintenance
ABB miniature circuit breakers require no special
maintenance; only normal electrical system
maintenance procedures are required.
Removing MCB
Possible mounting arrangements of MCB accessories
H11
S
A
BM
A
MCB
BM
MCB
BM
S/H
Shunt trip or undervoltage release
mounted with auxiliary switch
Shunt trip and/or undervoltage release
Shunt trip and undervoltage release
Remove seal
Add shunt trip to MCB
Attach with spring clamps
14
Low Voltage Products & Systems
ABB Inc. • 888-385-1221 • www.abb-control.com
14.21
AC 1600 - 3/03
14
Approximate dimensions
Accessories
00.00
00.00
Sy
s
Pr tem
o
M
Inches
[Millimeters]
Accessories
Left or right side mtd
Left side mtd
H/S
H_
A_
Bell alarm
Auxiliary switch
Shunt trip
Undervoltage trip
0.35
0.35
0.69
0.69
8.8
U_
3-pole MCB
17.5
8.8
17.5
MB-CL
Front mounting clip
1.77
45
C.L.
D
2.26 1.77
57.5
C.L.
45
0.69
17.5
1.38
35
2.07
52.5
MB-3PD
Front mounting bracket
3.25
2.12 ( 3P )
1.43 ( 2P )
1.87
CL
C
L
BREAKER CUT OUT
14
0.74 ( 1P )
BKT. MT. HOLES
0.25 DIA. TYP 2
RHS2-M
Handle mechanism
0.63
16
2.07 52.5
CL
0.83
21
1.38 35
3.54
90
CL
4.36
110.4
1.77
45
3.26
82.5
Low Voltage Products & Systems
ABB Inc. • 888-385-1221 • www.abb-control.com
14.29
AC 1600 - 3/03