M1121 NST Neutral and Supply Tester ( NSW Specification )
The Dewar M11121 NST Neutral and Supply Tester was designed in conjunction with Power companies. To ensure the incoming Active and Neutral power connections to customer’s premises are correctly identified and are safe to use before a power connection is made. EFO also supplies NST testing accessories and personal protective equipment.
LCD screen to display measurement results and messages.
CAT IV 600V instrument and lead set compliance.
IP54 moisture and dust ingress rating.
Compact hand held unit housed in a lightweight heavy-duty case
Uniquely self powered passive device.
Power is taken directly from the user’s connections.
3 LED indicators and an LCD screen for status and measurement information.
An audible alarm is fitted internally as a secondary indicator. To indicate a pass at the end of the measurement cycle or a measurement failure.
Measures volts and impedance in relation to the connected Active, Neutral and reference Earth to determine a safe or unsafe condition.
Furthermore Carries out automatic internal self checks to ensure correct functionality of the instrument. EFO also supplies further testing accessories and personal protection equipment.
Specification Neutral and Supply Tester
Input Operating Voltage: 150 to 300 VAC RMS measured between any combination of the Active, Neutral and Earth terminals.
Input Frequency: 45 to 65 Hz sinusoidal.
Quiescent Current: Less than 30mA @ 240 VAC RMS nominal.
Test Current: 8A ±5% @ 240 VAC RMS Active to Neutral for four full 50 Hz mains power cycles.
Active to Neutral Pass Voltage: 205 to 264 VAC RMS.
Maximum Neutral to Earth Voltage: 10.0 VAC RMS ±5%.
Maximum Active to Neutral Impedance: 1Ω ±5% maximum.
Max Earth Connection Impedance: 10kΩ ±5% maximum.
Operational Temperature Range: -10 ˚C to 55˚C.
Max Relative Humidity: 80% maximum, non-condensing.
NST Test Lead Set and also Hanging Clip.