8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
MaGnuM PRoDuct GuiDe
CA013002EN—April 2017 www.eaton.com
53
Accessory devices and connections
•
Spring Release (SR)
The spring release is an optional device . It remotely closes the
circuit breaker when the coil is energized by a voltage input .
The closing spring must be fully charged and the trip latch
reset (not held in the tripped position) for the spring release to
operate . If these two conditions are not met, the close signal
will be ignored until it is removed and re-applied .
An optional Latch Check Switch (LCS) can be installed to
indicate when the breaker is “ready to close .” The LCS wired
to the spring release will not permit activation of the spring
release until the breaker is fully charged and the trip latch is
reset . If power is applied and maintained to the spring release,
activation will occur when the breaker is “ready to close .”
The LCS for remote indication consists of one Form C contact
wired to the circuit breaker secondary contacts for integration
into external control schemes .
otee:
N
Wiring the LCS for remote indication directly in series with the
SR accessory is not recommended, as this will override the “anti-
pump” feature of the electrical charging/closing system .
otee:
N
Do not use a monitoring circuit on a spring release .
Spring release with optional latch switch
Table 15 . Spring release ratings
control
voltages
operational
voltage range
85–110%
inrush/
continuous
power
consumption
opening
time
24 Vdc
20–26 Vdc
250 W
40
48 Vdc
41–53 Vdc
250 W
40
60 Vdc
51–66 Vdc
300 W
40
110–125 Vdc
93–138 Vdc
450 W
40
220–250 Vdc
187–275 Vdc
450 W
40
110–127 Vac
93–140 Vac
450 VA
40
208–240 Vac
177–264 Vac
450 VA
40
•
Undervoltage Release (UVR)
The undervoltage release is an optional device on both
manually and electrically operated circuit breakers . It opens
the breaker when its supply voltage falls to between 35–60%
of rated voltage . If the release is not energized to 85% of its
supply voltage, the circuit breaker cannot be closed electrically
or manually .
Table 16 . Undervoltage release ratings
control
voltages
operational
voltage
range
85–110%
Dropout
voltage
30–60%
inrush/
continuous
power
consumption
opening
time (ms)
24 Vdc
20–26 Vdc
7–14 Vdc
250 W/18 W
70
32 Vdc
27–35 Vdc
10–19 Vdc
275 W/15 W
70
48 Vdc
41–53 Vdc
14–29 Vdc
275 W/18 W
70
60 Vdc
51–66 Vdc
18–42 Vdc
275 W/18 W
70
110–125 Vdc
94–138 Vdc
33–75 Vdc
450 W/10 W
70
220–250 Vdc
187–275 Vdc
66–150 Vdc
450 W/10 W
70
110–127 Vac
94–140 Vac
33–76 Vac
450 VA/10 VA
70
208–240 Vac
177–264 Vac
62–144 Vac
400 VA/10 VA
70
380–415 Vac
323–457 Vac
114–249 Vac
480 VA/10 VA
70
480 Vac
408–528 Vac
144–288 Vac 400 VA/10 VA
70
600 Vac
510–660 Vac
180–360 Vac 400 VA/10 VA
70
Required for 200 ms
Required for 400 ms
Undervoltage release
All Three Accessories (ST, SR, UVR) Installed
1 2
2
2
2
2
2
1
2
