Z Corporation Of India

'Z-Watt '  Punched grid resistors consist of grids punched from corrosion resisting SS 304 grade Steel or a high-grade FrCrAl Alloy.

The plates may be switched in series and parallel. As a result, every conceivable resistance value can be realised quickly and easily.

Steel-grid resistors consist of steel elements or plates punched in a meandering pattern.

For mechanical stability the longitudinal sides of the grids are reinforced to allow the plates to be assembled into blocks with insulated threaded bolts.

Thanks to the large surface area, this structure results in particularly good heat emission and is therefore suitable for high continuous outputs. In addition, the large mass of the resistor packages permits very high impulse loads.

Technical specifications

Resistor Element

SS304 Punched Grid Plates

Insulators

Ceramic Insulators provided between SS304 plates

Operating Voltage

600VAC (850VDC) / 690VAC (1100VDC)

Cooling

Natural Air Cooling / Forced Cooling

Peak Power

150% / 200% for 1 min

Insulation Voltage

2500 VAC / 1 min

Terminals

Copper/Aluminium Busbar Links or Stud Terminals

Ambient Temperature

45-50 °C

Maximum Temperature

Maximum 375 °C over ambient

Insulation Resistance

> 20 MΩ at 1000VDC

Dielectric Strength

No breakdown at 2.5 kVAC RMS

Earthing Bolt

M8 / M10 Size Bolt