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© Siemens AG 2007<br />
BD2 <strong>System</strong> — <strong>160</strong> ... 1250 A<br />
Introduction<br />
BD2-AK3 tap-off units up to 125 A<br />
with fuse switch-disconnectors and fuse bases<br />
Features:<br />
• On versions with fuse switch-disconnectors or circuit-breakers,<br />
the cover is interlocked with these switches and can<br />
therefore be opened only when they are switched off.<br />
• On versions with fuse bases, the disconnector built into the<br />
cover does not disconnect the load. It only removes the<br />
voltage from the installed fuse bases when the cover is<br />
opened.<br />
• Terminal bolts for cables.<br />
NSV0_00136<br />
BD2-AK3X/GSTZ00<br />
Tap-off units BD2-AK2 up to 63 A and BD2-AK3 up to 125 A<br />
configured to customer specifications<br />
Features:<br />
• Device installation to customer specification in compliance<br />
with the requirements for type-tested low-voltage switchgear<br />
and controlgear assemblies (TTA). Engineering, quotations<br />
and delivery through your Siemens contacts in our branches.<br />
• Devices mounted on pre-drilled mounting plates, module<br />
mounting rails or top-hat rails according to EN 60715.<br />
BD2-AK02 (AK03) sheet steel-enclosed tap-off units<br />
without cover-integrated switch-disconnector<br />
Features:<br />
• Hot-galvanized sheet steel and cover with powder-coated finish,<br />
color light gray, RAL 7035.<br />
• The tap-off units can be mounted and removed with the cover<br />
open and closed.<br />
• With the cover open the voltage is still applied to the installed<br />
devices (test facility). Degree of protection IP20 (finger-safety)<br />
is assured.<br />
• Do not mount or remove tap-off units under load.<br />
• An anti-rotation feature prevents incorrect mounting.<br />
• Cables can be introduced from three sides; use plastic cable<br />
glands with strain relief (not supplied).<br />
• Power pick-up via silver-plated lyra-shaped contacts.<br />
• If the PE conductor is used as a PEN conductor, note that the<br />
PE contact of the BD2-AK03 tap-off units have only half the<br />
cross-section and therefore cannot carry the full rated current.<br />
• The connection cable should be supported separately if<br />
required.<br />
Mounting unit:<br />
For installing devices (e.g. miniature circuit-breakers) in conformance<br />
with DIN 43871, with 8 MW. 1 MW equals a space<br />
requirement of 18 mm. Hinged covers on all tap-off units allow<br />
device operation from outside.<br />
BD2-AK02 tap-off units up to 63 A<br />
with fuses, miniature circuit-breaker<br />
Features:<br />
• Miniature circuit-breakers can optionally be operated from the<br />
outside (mounting unit with 8 MW; 1 MW = 18 mm)<br />
NSV0_00131<br />
NSV0_00138<br />
BD2-AK2...<br />
BD2-AK02M2/A323<br />
5<br />
Siemens LV 70 · 2006<br />
5/9
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