HVT 300-DP
The HVT 300-DP is a SIL2-rated transmitter that measures a differential voltage (up to +/- 250 V DC). Typically, it is used in electrolyser applications to identify leakages in stacks, membrane failures or ground faults. It provides valuable insight of the voltage distribution in the process to the operator, allows to optimize the operation and prevents accidents
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Key Features & Benefits
- Failsafe voltage monitoring
- Simple software configuration via USB or Modbus RTU – +/- 250V DC measurement range
- Redundant architecture
- Robust design with high dielectric strength
- SIL2 according to IEC/EN 61508
- Two individual safety outputs
- LED status: Power, Error, Alarm
- 10-year proof test interval
Typical Applications
- Monitoring busbar symmetry in hydrogen electrolysis systems
- Optimizing efficiency, safety, and reliability of electrolysis processes
- Ensuring consistent and high-quality hydrogen production
- Proactive detection of cell ruptures, leakages, or insulation faults in Chlorine-Alkali processes
- Preventing current imbalance that can reduce performance or cause safety risks
Scope of use
- Battery Testing
- High power supplies
- Chlorine Alkaline Electrolysis
More info
Safety Features
Featuring a design approach that involves thorough self-monitoring, the HVT 300-DP provides a wide range of diagnostic functions. In order to create a safety loop, the desired output must be evaluated in conjunction with one of the two diagnostic relays REL3/REL4. This way, two individually configurable safety outputs can be created, for which either the relays REL1/REL2 or the 4…20mA analog output are available.
| Parameter | Specification |
|---|---|
| Certificate | SIL 2 according to IEC 61508 |
| Measurement range | ±250 VDC |
| Input resistance | 12 MΩ each channel |
| Analog output | 0/4–20 mA |
| Load | Max. 500 Ω at 22 mA |
| Accuracy | < 0.5% |
| Contact outputs | Normally Open Switching Power: Max. 62.5 VA / Max. 30 W Switching Voltage: Max. 125 VAC / 110 VDC Switching Current: Max. 1 A Contact Material: Ag Pd + 10 µAu |
| Status LEDs | Power: Green Error / SIL Alarm: Red REL1 / REL2: Yellow |
| USB Interface | USB 2.0 |
| RS485 Interface | Half duplex, no scheduling, Baud rate: 9600 bps, Device Address: 1–248 |
| Supply | 24 VDC (20–30 VDC) |
| Power consumption | Max. 1.9 W |
| Temperature | Operating: -10°C…+60°C, Storage/Transport: -20°C…+70°C |
| Permissible humidity | 10%–90% r.H, no condensation |
| Max. operating altitude | < 2000 m above mean sea level |
| Temperature coefficient | Max <0.01 %/K, Typical <0.005 %/K |
| Galvanic isolation / Overvoltage category | 4.3 kV AC test voltage, CAT II: 1000 V, Pollution Degree 2 |
| PCB material | FR4 |
| Housing material | Polyamide |
| Protection class | IP20 |
| Flammability | UL94 V0 |
| Mounting type | 35 mm DIN rail |
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