J+J
’s BSR system simply provides an alternative
power supply to drive the electric actuator to a pre-
set failsafe position in the event of a mains power
failure. It has no mechanical springs, it uses internal
battery power.
During normal operation the
J3
-BSR operates as a
power open - power closed electric actuator, simulta-
neously maintaining the industrial re-chargeable battery
at full strength from an internal trickle charging system.
The main advantage of
J+J
’s BSR system is that it is
more competitively priced compared to mechanical
spring return electric actuators, as the
J+J
failsafe
actuator has no mechanical springs to compress, or
solenoids to release them - the actuator is the same
size as that for an on-off version. This offers massive
savings compared to true mechanical spring return
electric actuators.
What it does and how it works
Aug 2010
Doc: J3/BSR/03/KW
Quick guide to the
J3
electric
actuator
standard features :
Highly visible LED light gives
continuous actuator status
indication.
J3
L - 12-24V AC/DC
J3
H - 80-240V AC/DC
Multi-voltage electric actuator
with auto-voltage sensing:
Torque output: range:
25~95Nm Break
20~80Nm Reseat
Electronic torque limiter
Protects against valve jams
Anti-condensation heater
Manual override
All connections via external DIN
plugs ~ no need to remove cover
to connect
Volt free end of travel
confirmation switches
IP65 weatherproof housing
CE marked
Traceable sequential serial num-
bering system
Optional failsafe kit (Battery
Back-up) - actuator fails to safe
position on power failure
Optional modulating kit with
digital positioning system, either
0-10V or 4-20mA
Failsafe version
‘BSR’
B
attery ‘
S
pring
R
eturn’
J3
The industrial battery is deliberately oversized
and whilst not necessary, can provide many
cycles at full load. This offers a degree of pro-
tection in the unlikely event that the battery
degrades and loses some charge.
In the event of a mains failure, if not already in
that position, an internal switch changes to
immediately draw battery power to drive the
actuator to the failsafe position.
Following a battery driven cycle the actuator
will need to charge for a short period to re-
place the energy used in the battery cycle.
This is particularly relevant if you intend to
use the
J3
-BSR like a solenoid, eg: energise
open, fail close.
The BSR fits inside the
J3
electric actuator
housing eliminating extra piggy-backed hous-
ings, making the
J3
failsafe actuator very
compact and lightweight. It can be supplied as
a retro-fittable kit containing all the parts
needed to convert a standard on-off electric
actuator.
