Key Features and Benefits
Advanced Thyristor Technology:
6-Pulse Rectifier (12-Pulse Optional): The GR-3811 and GR-3812 models use a 6-pulse thyristor rectifier, with an option to upgrade to a 12-pulse configuration for applications requiring lower harmonic distortion and higher efficiency.
Galvanic Isolation: Ensures complete separation between input and output, providing enhanced safety and protection against electrical noise and interference.
User-Friendly Interface and Monitoring:
GR-3811: Equipped with a color TFT touchscreen panel, offering intuitive operation, easy navigation, and a digital display with non-volatile event ring memory for real-time monitoring and historical data access.
GR-3812: Features an LC display with LED indicators in a mimic diagram, providing clear and straightforward operational feedback.
Reliable Performance and Safety:
Automatic Charging with Three IU Characteristics: Supports continuous, strong, and forming charges according to DIN 41772 standards, ensuring optimal battery health and longevity.
Temperature Monitoring: Two-stage temperature monitoring with warning and shutdown functions to protect the power unit from overheating, ensuring consistent performance and long service life.
Fanless Design: Natural air cooling through convection reduces maintenance needs and minimizes the risk of failure in dust-prone or corrosive environments.
Flexible Integration and Customization:
Parallel Operation: The rectifiers can be connected in parallel for increased capacity or redundancy, ensuring scalability for larger systems.
Remote Signaling and Control: Equipped with 8 remote signals (configurable potential-free contacts) and an RS232 interface for seamless integration with existing monitoring systems.
Custom Options: A variety of customizable electrical and mechanical parameters are available, including specific voltages, frequencies, protection classes, and additional monitoring or protective devices.
Compliance with International Standards:
The GR-3811 and GR-3812 rectifiers comply with a wide range of international standards, ensuring safety, reliability, and environmental sustainability:
Low Voltage Directive: 2014/35/EU, ensuring electrical safety.
EMC Directive: 2014/30/EU, governing electromagnetic compatibility.
RoHS Directive: 2011/65/EU, restricting the use of hazardous substances.
Technical Specifications
| Parameter | GR-3811 | GR-3812 |
| Nominal Voltage | 24 / 48 / 60 / 110 / 120 / 220 | 24 / 48 / 60 / 110 / 120 / 220 |
| Nominal Current | Up to 1500 A | Up to 1500 A |
| Rectifier Version | Galvanically isolated, thyristor 6-pulse, >500 A 12-pulse | Galvanically isolated, thyristor 6-pulse, >500 A 12-pulse |
| Input Voltage | 3/N/PE AC 400/230 V ±10% | 3/N/PE AC 400/230 V ±10% |
| Voltage Tolerance (Output) | ±1% | ±1% |
| Frequency | 50 Hz ±5% | 50 Hz ±5% |
| Charging Curve | IU charge according to DIN 41772 3 | IU charge according to DIN 41772 3 |
| Voltage Ripple | <2% eff. without battery | <2% eff. without battery |
| Protection Class | IP 20 (floor IP00) according to EN 60529 | IP 20 (floor IP00) according to EN 60529 |
| Display and Control Unit | Color TFT touchscreen | LC display with LED indicators |
| Remote Signaling | 8 signals / 2 potential-free changeover contacts per signal | 8 signals / 2 potential-free changeover contacts per signal |
| Test Voltage | Input/Output: 5.3 kVDC, Input/Body: 2.3 kVDC, Output/Body: 2.8 kVDC | Input/Output: 5.3 kVDC, Input/Body: 2.3 kVDC, Output/Body: 2.8 kVDC |
Permissible Environmental Conditions:
Storage: Compliant with EN 60721-3-1 (1K21 / 1M11), suitable for temperatures from +5 to +40 °C.
Transport: Built to withstand extreme temperatures during transport, from -45 to +70 °C, compliant with EN 60721-3-2 (2K12 / 2M4).
Operation: Designed for reliable performance in temperatures from +5 to +40 °C, with relative humidity between 5-85% without condensation, following EN 60721-3-3 (3K22 / 3M11).
Customization and Options
Electrical Parameters: Customizable voltage and frequency settings to match specific requirements.
Mechanical Parameters: Options for higher protection classes (e.g., IP21 and above) and custom base plates.
Functional Add-ons: Additional protective devices (MCCB, surge arrester), monitoring systems (fan, earth fault), and communication interfaces (Profibus, Modbus, SNMP).
Temperature-Controlled Battery Charging: Advanced battery management options to optimize charging based on environmental conditions.