9 – 92
9.3
External voltage supply
The basic protective functions (L, S, I, & G) of the electronic trip units do not require an auxiliary power supply.
To use the extended functions of trip units ETU745 - 776 requiring data exchange via the
c
, an external 24 V DC (class 2) voltage
supply must be connected.
Connection
Version A: Connection to hand plug X8 (preferred version)
Version B: Connection to any
c
module
Requirements
The external voltage supply with 24 V DC must fulfill at least the requirements of UL class 2.
To supply power to a circuit breaker equipped with the maximum possible number of external
c
modules, one of the Siemens
power supply units listed below can be used. If a second circuit breaker is to be supplied, a second power supply unit is also required.
The external power supply used for electronic components must not be used to supply the motor-operated mechanism.
When using voltage supply units from other manufacturers, the following conditions must be fulfilled:
- Primary-switched-mode power supply unit
- 24 V DC, ± 3 %
- Current rating: 2.5 A per circuit breaker maximum possible number of external
c
modules or 3.8 A for two circuit
breakers with the maximum possible number of external
c
modules.
Catalog number
Power supply
Catalog No.
120/230 V AC / 24 V DC, 2.5 A
WLSITOP25
120/230 V AC / 24 V DC, 3.8 A
WLSITOP1
Содержание UL 1066
Страница 43: ...6 12 7 Reset reclosing lockout 8 Charge closing spring 9 Switch ON Frame size II Frame size III 9X ...
Страница 56: ...7 5 7 2 Frame size II fused ...
Страница 58: ...7 7 ...
Страница 63: ...7 12 8 27 210 0 8 27 210 0 8 27 210 0 3 75 95 2 ...
Страница 64: ...7 13 ...
Страница 65: ...7 14 7 7 Frame size III fuse carriage ...
Страница 66: ...7 15 ...
Страница 69: ...7 18 7 9 External sensor for neutral conductor WLNCT2 ...
Страница 70: ...7 19 WLNCT3 ...
Страница 85: ...9 5 I tripping Ground fault tripping ...
Страница 231: ...15 12 Pre assembling the locking module Installing 0767 1 2 3 4 6 5 ...
Страница 232: ...15 13 1 Socket head cap screw M5 with washer and nut 7 8 Size 4 5 Nm 45 lb in ...
Страница 271: ...19 10 Function check Then Fit back front panel and side cover on the right if it was removed page 23 4 10 ...
Страница 280: ...21 2 Installing the door sealing frame Not for use with fuse carriages Catalog No Door sealing frame WLDSF 1 2 3 NOTICE ...
Страница 289: ...23 7 23 3 3 Installing arc chutes 1 2 6 5 PH 2 0043 02 3 4 5 6 For frame size III 3 PH 2 ...
Страница 298: ...23 16 6 7 8 9 5 2 1 Size 5 mm ...
Страница 333: ......