Using the NSG 200 series of instruments, different types of mains interference can be simulated.

• Mainframe - NSG 200D contains line switches, line filter, fuses and other elements
• Plug-In - NSG 203A simulates short variations and interruptions in line voltage

NSG 200D Mainframe (Pulse Coupler)

• Operation with line voltage
  * Max rated voltage: 120V / 60 c/s
  * Max rated current: 16A
• Operation with external voltage
  * Max rated voltage (=): 400 volts
  * Max rated voltage (~): 250 volts (RMS)
  * Max rated current (50/60 c/s and dc): 16A
  * Max rated current (400 c/s): 6A

NSG 203A Plug-In

NSG 203A can be used to simulate short variations in line voltage or line failures.  For simulating a variation from a high voltage to an abnormally low voltage ( for example, if one voltage is 150V, the other 280V ), two external variable voltage transformers are needed.  Cables to these transformers with corresponding connectors are available as NSG 322 ( one transformer ) and NSG 323 ( two transformers ).

Using the NSG 203A equipment can be tested to the following test specifications:

• Mil Std 704 A, Mil Std E 4158 (Table II - Fig. 1)
• BS 4509 / 4525, CEE (Sekr. 229) UK 121, EEC Com. (78) 766 final
• VDE 0160 8 and British specification CE GB - EES (1970)

Schaffner NSG 222A Fast Impulse Plug-In
Produces fast interference pulses typical to mechanical devices such as relays, switches etc. Pulse amplitude 50 to 2500V, rise time 5 to 10ns, pulse duration unload 100ns loaded 80ns into 50O.

TECHNICAL INFORMATION

• Line voltage: 220 / 240V - 50 Hz
• Option: 110V - 60 Hz
• Max rated current through line filter: 16 Amp
• Max. voltage across load: 600V~

Line Failure

• Duration of the failure short: 1.5 msec - 30 msec
• Duration of the failure long: 25 msec - 500 msec
• Interval between failures: 0.6 sec - 25 sec

Line Voltage Variation

• Duration of interval with changed line voltage
  short: 10 msec - 300 msec
  long: 0.25 sec - 5 sec
• Interval between changes: 0.6 sec - 25 sec

Output Trigger ( "Start" and "Stop" )

• Amplitude: +10V
• Duration: 1.5 msec