ST 3800G

• With the Surge Tester ST 3800 winding goods like stators, rotors, transformers etc. can be tested for insulation damages and predamages
• Not only already existing interturn short-circuits are being detected; the test procedure also detects predamages that are not yet recognized as electric interturn short-circuit
• Scope of testing functions, base device:
  • Surge test up to 6000 VDC / 40 nF
  • High voltage test up to 6000 VDC / 10 mA
  • Insulation measurement up to 6000 VDC / 6 GOhm
  • PI / DAR measurement
• Extensions:
  • Resistance measurement 
  • High voltage test up to 5500 VAC
  • Direction-of-rotation reckognition
  • Matrix for 2, 3 and 2x3 coils
  • Temperature measurement
• With the bundled WINDOWS software the devices can be controlled through the ethernet interface by a normal PC

The impulse winding test is the best possible way to test the inner insulation of a coil. With this test method, interturn short circuits can be detected and existing defects which are not yet electric interturn short circuits are detected as well. Such existing defects will turn into an interturn short circuit only when operated by means of thermal or mechanical influences which will then inevitably lead to a breakdown of the coils.

Series ST 3800 devices are mainly applied in batch production as well as in laboratories and in development. The risk of an early failure can be substantially reduced for all high quality products, such as transformers, motors, coils, inductors, etc.

The device is programmed and operated via a user-friendly WINDOWS interface. Since an integrated hard disk is used as storage medium for the master curves, storage of several thousand curves and test programmes is easily possible.

Technical Data

• plug-in 19“ / 5 HU, incl. housing
• free space 2 HE for extension with matrix
• DUT connections via front panel
• all the necessary operation elements for a manual work station. The I/O interface is partly needed for these functions.
• CE-conform, corresponds to EN 50191
• surge generator:
  • electronic source of 300 VDC up to 6000 VDC
  • surge capacity 40 nF, extendable internally and externally
  • semi-conductor switch
• highpass filter:
  • for a measurement of the glow discharge / corona independent of amplitudes
  • comparison measurement for evaluation of the insulation limits of the DUT
• high voltage test:
  • electronic source of 300 VDC up to 6000 VDC
  • release current in 3 ranges: 0.1 mA, 1 mA, 10 mA
  • safety current limitation according to EN 50191
• insulation measurement 
  • electronic source of 300 VDC up to 6000 VDC
  • measurements up to 6 GOhm (voltage-dependent)
  • PI / DAR measurements
  • safety current limitation according to EN 50191

• Methods of evaluation:
  
  Error area
  
  
  
  
  
  Difference error area
  
  
  
  
  
  Tolerance band method
  
  
  
  
  
  Glow discharge
  
  
  
  
  
  
  
• It can also be operated with a double impulse. The DUT is tested twice and the evaluation is carried out by means of the specified evaluation methods
• Rear interfaces:
  • Ethernet (for remote control)
  • USB
  • RS-232
  • Direction-of-rotation sensor
  • Matrix control with 24 digital outputs (24VDC)
  • I/O-interface with 8 digital inputs (24VDC), 8 digital outputs (24VDC) and 2 analogue inputs (10VDC)
  • Cold appliance socket (IEC 320) for the device technique
  • Cold appliance socket (IEC 320) for the PC technique
  • DUT connection
• DLL driver for integration into own software 
• Power supply 230 V, 50 Hz, max. 400 VA
  
  
  

Extensions

• RX 11 resistance measurement for one measuring range, class 1.5
• RX 16 resistance measurement with Micro-Ohm-Meter, Typ DU 5010 (3 HU additionally)
• MX 02 matrix for 2 temperature sensors
• MX 20 matrix for 2 coils, performed in 4-wire technique
• HD 26 direction-of-rotation recognition
• MX 30 matrix for 3 coils, performed in 4-wire technique
• MX 60 matrix for 2 x 3 coils, performed in 4-wire technique

Accessories

• LT 01 laptop
• HS 75 direction-of-rotation sensor
• KL 24 small Kelvin terminal / connections
• KP 25 rocking lever for connection of DUT
• KL 25 Kelvin clamp
• PS 25 prism for stators, one-piece
• PS 26 prism for stators, two-piece
• LK 25 pneumatic cable clip / line terminal
• WE 25 service unit
• TH 25 room temperature compensation
• TH 26 infrared DUT temperature measurement

Work station set-ups

• test tableau / panel TB 3800S
  
  

• Test cage PK 3800S
  
  
  
  
  
  
• Tandem test cage TK 3800D