SEW 760 Series

The SEW 760 Series of Shakers are matched with the DSA 280K and DSA 320K Series of Power Amplifiers. Its armature supply is assembled in four 19-inch network racks of 36 unit height and field supply is assembled in two 19-inch network racks of 36 unit height. The water cooling system is assembled in two 19-inch network racks of 36 unit height. All three system communicate with each other over a galvanically isolated RS 485 interface.

Standard Features

• Complies with Machinery Directives, Low Voltage Directive and Electromagnetic Compatibility Directive under CE
• Aluminium or Magnesium alloy armature structure
• Hydrostatic central guidance bearing
• Trunnion mounted shaker for operation in vertical and horizontal position
• Pneumatic and DC based auto-centring of armature head
• Body isolation using air bellows to isolate vibrations from the shaker
• Air isolation mounts between system base and ground
• Lowering of gauss level at the armature head
• Hermetically sealed construction

Optional Features

• Up to 76 mm (3.0 in) with Long Stroke
• PC based Power Amplifier Remote
• Auto Resume from power failure
• Auto Stop after user profile completion
• Attachment to Horizontal Slip Table and Head Expander
• Integration with Environmental Chamber

Technical Specifications

SEW 760 Series Shaker, DSA Series Amplifier	SEW 760 – DSA 280K	SEW 760 – DSA 320K
System Performance
Armature Diameter	760 mm	760 mm
Sine Force (peak)	28000 kgf	32000 kgf
Random Force (rms)	28000 kgf	32000 kgf
Shock Force (rms)	56000 kgf	64000 kgf
Acceleration (sine)	100 g	100 g
Velocity (sine peak)	1.8 m/s	1.8 m/s
Velocity (shock peak)*	2.4 m/s	2.4 m/s
Displacement (pk-pk)**	51 mm (2 in) / 76 mm (3 in)	51 mm (2 in) / 76 mm (3 in)
Axial Resonance (±5%)	1300 Hz	1300 Hz
Useful Frequency Range	5 to 1700 Hz	5 to 1700 Hz
Protection Interlocks	Mains Input Over & Under Voltage, Over Current, Loss of Input Phase, Over Temperature Amplifier & Shaker, Field Fail, Cooling, User Safety Interlock if specifically required by the customer
Shaker Characteristics
Moving Element Mass	260 kg	280 kg
Internal Load Capability	3000 kg	3000 kg
Suspension Axial Stiffness	15 kg/mm	15 kg/mm
Suspension Cross-Axial Stiffness	3800 kg/mm	3800 kg/mm
Stray Magnetic Field***	< 1 mT (10 gauss)	< 1 mT (10 gauss)
Compressed Air****	7 bar (100 psi)	7 bar (100 psi)
Cooling	A dedicated cooling system for storing, circulating and cooling distilled water used for cooling
Amplifier Characteristics
Power Output	280 kVA	320 kVA
Total Harmonic Distortion*****	Typically 0.5%	Typically 0.5%
Input Impedance	> 10 kΩ	> 10 kΩ
Input Sensitivity	4 Vrms, Compatible with all standard controllers	4 Vrms, Compatible with all standard controllers
Signal-to-Noise Ratio	> 75 dB	> 75 dB
Power Efficiency*****	> 92%	> 92%

Armature Insert Pattern	SEW 760 Shaker
Pattern	PCD	PCD	PCD	PCD	PCD
Position of Insert	Centre	200 mm	400 mm	550 mm	700 mm
No. of Inserts (Total – 33)	1	8	8	8	8

Safety Norms
CE	Complies with Machinery Directive (2006/42/EC), Low Voltage Directive (2014/35/EU), and Electromagnetic Compatibility Directive (2014/30/EU)

Notes:

*Peak shock velocity with reduced field power **76 mm (3.0 in) with Long Stroke option ***150 mm above armature head ****Compressed air to be provided by customer at installation site *****Measured on pure resistive load Customised specifications are also tailored on request Please contact Sdyn for advice on the optimum specifications to meet your testing requirements Specifications are correct at the time of publication and are subject to improvement or amendment without prior notice