Type testing

• Measurement of the volume of gas necessary to trip the alarm
• 500 hour salt fog
• Electromagnetic Field test (EN 50216-2)
• Stationary sinusoidal mechanical vibrations (EN60721-3-4)
• A seismic test was performed (EN 50216-1)
• Pressure withstand test 2.5 bar two minutes with oil at 100 deg C.
• Vacuum withstand test of 2500 Pa for 24 Hrs
• Rate of flow test to operate trip contacts
• Test to show the relay is insensitive to oil flow from conservator to transformer
• Electrical test

Routine tests applied to all Relays

• Hydraulic seal test in mineral oil at
  • 90 °C. and
  • 100 kPa pressure for
  • 30 minutes
• Contact operation
  • Mechanical push rod
• Contact operation
  • Lowering the oil
• Rate of oil flow to trip the contacts
• Electrical withstand test between contacts
• Electrical withstand test between contacts and earth

An individual routine test report is shipped with each relay