Fusible overtemperature protection and tripping devices

Fail-safe overtemperature protection of heater coils and tubular elements

Fusible overtemperature protection and tripping devices
Fail-safe overtemperature protection of heater coils and tubular elements

Schaltbau fusible overtemperature protection and tripping devices ensure fail-safe thermal cutout protection against overheating of electric air heaters as used in rail vehicles and stationary heating systems. The devices are a prerequisite for fire protection and operate totally independent of the heater controls.

  • Fail-safe overtemperature protection of heater coils and tubular elements
  • Tripping function independent of control voltage
  • Replacement fusible link necessary after tripping operation
  • Optional auxiliary contact for version ZH437
  • Applicable standards: IEC 60077, IEC 50124-1

Available series

ZH037 Exxx – Fusible linksZH037 Exxx – Fusible links

For use with the overtemperature protection devices and tripping devices

ZH437 Exxx – Fusible linksZH437 Exxx – Fusible links

For use with the overtemperature protection devices and tripping devices

ZH437 K VA – Fusible tripping devices made from stainless steel, standardZH437 K VA – Fusible tripping devices made from stainless steel, standard

3000 V nominal voltage, 4000 V rated insulation voltage

ZH437 K-H – Tripping device with auxiliary switch, standardZH437 K-H – Tripping device with auxiliary switch, standard

3000 V nominal voltage, 4000 V rated insulation voltage, snap-action switch S870

ZH437 K-HK – Tripping device with auxiliary switch, shortZH437 K-HK – Tripping device with auxiliary switch, short

1800 V nominal voltage, 4000 V rated insulation voltage, snap-action switch S870

ZH437 K – Tripping device, standardZH437 K – Tripping device, standard

3000 V nominal voltage, 4000 V rated insulation voltage

ZH437 K-K – Tripping device, shortZH437 K-K – Tripping device, short

1800 V nominal voltage, 4000 V rated insulation voltage

ZH037 K – Tripping device, shortZH037 K – Tripping device, short

1500 V nominal voltage, 1800 V rated insulation voltage

ZH437 K-KG – Overtemperature protection device, shortZH437 K-KG – Overtemperature protection device, short

1800 V nominal voltage, 4000 V rated insulation voltage

ZH437 – Overtemperature protection device, mediumZH437 – Overtemperature protection device, medium

1800 V nominal voltage, 4000 V rated insulation voltage