
28 – 3
S23
Signaling switch for 2nd shunt trip
S24
Bell Alarm signaling switch
S3
Contact position-driven auxiliary switch
S30
Signaling switch for disconnected position (TOC)
S31
Signaling switch for test position (TOC)
S32
Signaling switch for test position (TOC)
S33
Signaling switch for connected position (TOC)
S34
Signaling switch for connected position (TOC)
S35
Signaling switch for connected position (TOC)
S4
Contact position-driven auxiliary switch
S40
c
signaling switch for "ready-to-close"
S41
c
signaling switch for "closing spring charged"
S43
c
signaling switch for 2nd shunt trip
S44
c
signaling switch for "main contacts OPEN / CLOSED"
S45
c
tripped signaling switch
S46
c
signaling switch for connected position
S47
c
signaling switch for test position
S48
c
signaling switch for disconnected position
S50 ... S53
MOC (external auxiliary switches)
S-tripping
Short-time delayed tripping
SIGUT
Siemens trademark for aux. termination technique
ST
Shunt trip
T.U. ERROR
Trip unit error
TEST
Test position
t
g
Delay time for G-tripping
TOC
Truck operated cell switch (S30 … S35)
t
R
Delay time for L-tripping (defined at 6 x I
R
)
TRIP G
Trip cause was ground fault
TRIP I
Trip cause was short-circuit (instantaneous)
TRIP L
Trip cause was overload
TRIP N
Trip cause was neutral pole overload
TRIP S
Trip cause was short-circuit (short-time delayed)
t
sd
Delay time for S-tripping
t
x
Delay time for load monitoring
U
c
Rated control voltage
U
e
Rated operational voltage
U
i
Rated insulation voltage
U
Imp
Rated impulse withstand voltage
UL
Underwriters Laboratories Inc.
UVR
Undervoltage release (instantaneous)
UVR td
Undervoltage release (delayed)
VT
Voltage transformer
Summary of Contents for UL 489
Page 36: ...5 21 Frame size II 3000 A Frame size III 1 Holes 14 mm 0720 1 0721_nu ...
Page 63: ...7 2 Horizontal connectors 0733_nu top view ...
Page 64: ...7 3 Rear vertical connectors 0734_nu top view rear view ...
Page 65: ...7 4 Front connectors 0736_nu front view top view ...
Page 66: ...7 5 Front connectors and pressure wire terminals 0737_nu top view front view ...
Page 67: ...7 6 7 2 Frame size II fixed mounted version 0494 3_nu ...
Page 68: ...7 7 Class C always 0494 5_nu top view rear view ...
Page 69: ...7 8 2500 0738_nu LH side view front view ...
Page 71: ...7 10 7 4 Frame size III fixed mounted version 0495 1_nu LH side view ...
Page 72: ...7 11 0495 2_nu top view top view ...
Page 73: ...7 12 0495 3_nu top view rear view ...
Page 75: ...7 14 7 5 Door cut outs fixed mounted circuit breaker Frame size I 0735_nu ...
Page 76: ...7 15 Frame size II III 0496_nu ...
Page 77: ...7 16 7 6 Frame size I draw out version 0745_nu ...
Page 78: ...7 17 0746_nu rear view top view ...
Page 79: ...7 18 0747_nu bottom view ...
Page 80: ...7 19 0748_nu ...
Page 81: ...7 20 0749_nu ...
Page 82: ...7 21 7 7 Frame size II draw out version 0490 1_ul ...
Page 86: ...7 25 7 8 Frame size III draw out version ...
Page 87: ...7 26 ...
Page 88: ...7 27 ...
Page 89: ...7 28 7 9 Door cut outs for draw out circuit breakers Frame size I 0750_nu ...
Page 91: ...7 30 7 11 External sensor for neutral conductor WLNCT2 ...
Page 92: ...7 31 WLNCT3 ...
Page 107: ...9 5 I tripping Ground fault tripping ...
Page 351: ......