ALPHA Distribution Boards and Terminal Blocks

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ALPHA FIX Terminal Blocks Screw Terminals 8WH flat terminals © Siemens AG 2010 10 Terminal size 240 mm² 8WH1 060-0AU00 Accessories 8WH9 140-0KA00 8WH9 070-0VA00 8WH9 030-3AC00 Version DT Order No. Price per PU Flat terminals, terminal size 240 mm² • M16 terminal bolts • Double conductor run with set of screws • For busbar and cable lug connection • Flat clamp must be fitted • Terminal width 53 mm • c U, s • Terminal sleeve 70-240 mm² • AWG kcmil 00-500 • IEC 60947-7-1 • Supply data: I =415A, U = 1000 V • Height/length/width in mm: 56/125/53 • For inscription: labeling plates, front, for terminal width 10 and 12 mm (see page 16/9) Accessories Section Page C 8WH1 060-0AU00 1 5 044 • Flat clamps, for terminal size 240 mm² Accessories 10/64 C 8WH9 140-0KA00 1 10 044 • Partitions, for terminal size 95 ... 240 mm² Accessories 10/64 C 8WH9 070-0WA00 1 10 044 • Link rails, for terminal size 240 mm² -2-pole Accessories 10/64 C 8WH9 030-3EC00 1 10 044 -3-pole Accessories 10/64 C 8WH9 030-3ED00 1 10 044 Flat clamps, for terminal size 240 mm² • Raises busbar 12 mm over surface • Required for engaging and releasing 8WH1 060-0AU00 terminal C 8WH9 140-0KA00 1 10 044 Partitions •Gray • Can be snapped in without separation loss between the terminal mountings • 180 mm wide Versions • For terminal sizes 25 ... 50 mm² C 8WH9 070-0VA00 1 10 044 • For terminal sizes 95 ... 240 mm² C 8WH9 070-0WA00 1 10 044 Link rails For cross-linking high-current connectors with screw set AS Versions • For terminal size 25 mm² -2-pole C 8WH9 030-3AC00 1 10 044 -3-pole C 8WH9 030-3AD00 1 10 044 • For terminal size 50 mm² -2-pole C 8WH9 030-3BC00 1 10 044 -3-pole C 8WH9 030-3BD00 1 10 044 • For terminal size 95 mm² -2-pole C 8WH9 030-3CC00 1 10 044 -3-pole C 8WH9 030-3CD00 1 10 044 • For terminal size 150 mm² -2-pole C 8WH9 030-3DC00 1 10 044 -3-pole C 8WH9 030-3DD00 1 10 044 • For terminal size 240 mm² -2-pole C 8WH9 030-3EC00 1 10 044 -3-pole C 8WH9 030-3ED00 1 10 044 PU Unit(s) PS*/ P. unit Unit(s) PG 10/64 Siemens ET A1 · 10/2009 * You can order this quantity or a multiple thereof.
© Siemens AG 2010 ALPHA FIX Terminal Blocks Screw Terminals 8WH shield terminals ■ Overview ■ Technical specifications In industrial process engineering, a high interference immunity is required for electrical instrumentation and control. It is a decisive factor in the availability of industrial equipment. When designing low-interference systems, great importance is placed on cable shielding and the respective shield ground. The critical point is where the cable shield is connected to the enclosure ground. The connection should have a low resistance and a low inductive reactance, while being quick and easy to set up. The shield terminals are ideally suited for this purpose and can be used with all common cable shields. The effectiveness of cable shields depends to a large extent on the contact quality of the shield connection. The shield terminals have a large, low-impedance contact area with the shield, which reduces the voltage drop across it. Connected at one end only, shields can help reduce only low-frequency, capacitive interference, such as that caused by high-voltage installations. To protect from the much more common inductive interference signals, the cable shield must be connected at both ends. However, differences in the ground potential can cause a compensating current to flow through the cable shield. To reduce this unwanted current, it is advisable to connect the shield at several points along its length. The shorter the spaces between the clamping points, the smaller the compensating currents in the cable shield. In systems where safety is especially important, triax shields are used. These consist of two braids that are insulated from each other, with the outer shield connected at both ends and the inner one at only one end. With this arrangement, the compensating currents and the inductive interference are conducted through the outer shield, and the capacitive interference dissipated through the inner shield. Depending on the length of the terminal strip, two or more support brackets are fitted, which provides both an electrical and a mechanical connection from the busbar to the support rail and therefore to the enclosure ground. The shield terminal is simply fitted to the busbar after all wires have been connected. A spring-loaded pressure plate regulates the force applied to the cable to ensure an optimum contact with the busbar at all times. If the cable shield is to be connected at another point of the control cabinet instead of directly in front of the terminal strip, we recommend using support brackets made of molded plastic. 10 Dimensions 8WH9 130-0KA00 8WH9 130-0LA00 8WH9 130-0MA00 8WH9 130-0NA00 8WH9 130-0PA00 See dimensional drawing See dimensional drawing See dimensional drawing See dimensional drawing See dimensional drawing Contact resistance in mΩ < 1 Supply data • Diameter 2 ... 5 3 ... 8 3 ... 14 3 ... 20 20 ... 35 • Tightening torque in Nm 0.4 0.6 0.8 0.8 1.5 ... 1.8 8WH9 130-0AA00 8WH9 130-0BA00 8WH9 130-0CA00 8WH9 130-0DA00 Dimensions See dimensional drawing See dimensional drawing See dimensional drawing See dimensional drawing Contact resistance in mΩ The contact resistance is determined by the mounting area. Supply data • Diameter 3 ... 8 3 ... 14 3 ... 20 20 ... 35 • Tightening torque in Nm 0.6 0.8 0.8 1.5 ... 1.8 Impedance [m ] 500 Shield connection through PE terminal 50 5 Shield terminal 0,5 1K 10K 100K 1M 10M 100M Frequency [Hz] I2_12742 Comparison of shield connection through PE terminal and through shield terminal Siemens ET A1 · 10/2009 10/65
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ALPHA Distribution Boards and Termi
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© Siemens AG 2010 ALPHA FIX Termin
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Terminal size 6 mm² 8WA1 011-1DH11
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8WA1 011-1PM00 Terminal size 70 mm
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Accessories 8WA2 831 8WA2 835 8WA2
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