Gefran GRZ Three-phase solid-state relays, 10 A to 75A
Features
- Zero-crossing voltage switching (ZC)
- Overtemperature protection
- Compact designs
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The GRZ series is a three-phase solid-state relay that controls electric heaters and industrial heating processes. The compact designs are ideal for electrical panels with limited space.
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Electrical heating control
The current range for the GRZ series is 10A to 75A, and this controller has an efficient zero-crossing (ZC) mode.
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Two or three-leg load control
The GRZ series is configured to control two or three legs of a heating circuit. While three-leg breaks are commonly used, the two-leg option generates less heat in the electrical panel.
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Diagnostics
The GRZ series monitors and prevents system failures, and it reduces the risk of costly downtime and material waste. To improve uptime, this controller has a silicon-controlled rectifier (SCR) over-temperature alarm, it monitors line voltage for failures, it has fuse break protection, and load interruptions are monitored and displayed clearly for users.
- 10A to 75A, three-phase power
- Two or three-leg control
- Zero-crossing voltage switching
- Input command: DC/AC signals
- Operating range 0°C-70°C/32°F-158°F (derating curves)
- Load voltage 480V AC or 600V AC
- Status monitoring and five diagnostic LEDs
- Compact sizes to fit in electrical panels
- Push-in connectors
- Cage clamps for power cables
- Smart fan options (Vdc/Vac)
