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GR

Product catalog summary

Equipment Overview
The Thyristor-Rectifier models GR-3811 and GR-3812 are designed for efficient power conversion. They feature a 6-pulse or 12-pulse thyristor rectifier, input contactor, automatic charging, and analogue control boards with microprocessor supervision. The GR-3811 includes a TFT-panel with touchscreen, while the GR-3812 is equipped with an LCD display. Both models incorporate power stacks with two-stage temperature supervision and an isolation transformer at the input. They support 8 remote signals and offer an RS232-interface with optional Profibus, Modbus, and SNMP.

Proven Technology
The rectifiers boast high Mean Time Between Failures (MTBF) of 400,000 hours and user-friendly control functions. They feature temperature-regulated charging voltage and three automatic charging characteristics. The design is fanless, relying on natural air cooling by convection.

Technical Data
Rated voltages range from 24V to 372V, with a rated current up to 1500A. The rectifier design is galvanically isolated, with a 6-pulse configuration for currents up to 500A and a 12-pulse configuration for higher currents. Input voltage is 3/N/PE AC 400/230V with a tolerance of ±10%. The output voltage tolerance is ±1%, and the frequency is 50Hz ±5%. Charging characteristics follow IU acc. DIN 41772 with float, boost, and equalizing charge options. Ripple is less than 5% rms without a battery and less than 2% rms with an additional filter.

Safety, Environment, and Design
The equipment complies with safety standard EN 60950-1 and has an earth conductor current of less than 5% INom, typically 50mA. It has a protection type of IP 20 (floor IP00) according to EN 60529. Permissible environmental conditions include storage, transport, and operation as per EN 60721 standards, with temperature ranges from -25°C to +60°C and up to 85% relative humidity without condensation. The installation height is permissible up to 1000m above sea level, with a minimum air pressure of 870 hPa. Installation should be on a concrete or non-flammable surface with restricted access.

Instrumentation and Control
The GR-3811 features a colored TFT-panel with a touchscreen, while the GR-3812 has an LCD display. Remote signaling is available through terminal connections with two floating change-over contacts each. Contact ratings vary for AC and DC voltages.

High Voltage Test
Test voltages include 5.3 kVDC for primary/secondary, 2.3 kVDC for primary/body, and 2.8 kVDC for secondary/body.

Standards and Directives
The equipment adheres to the Low Voltage Directive 2006/95/EG and Electromagnetic Compatibility 2004/108/EG. It meets UPS general and safety requirements as per EN 62040-1 and EN 62477-1, EMI standards EN 62040-2, and performance and test requirements EN 62040-3. Charging equipment follows DIN 41772, and environmental conditions are classified under EN 60721.

Catalog excerpts

Thyristor rectifier 6-pulse (12-pulse) Input contactor for rectifier Automatic charging Analogue control boards with microprocessor supervision (GR-3811) GR-3811 TFT-panel with touchscreen, GR-3812 with LCD Power stacks with two-stage temperature supervision (failure monitoring/shut down) Isolation transformer in the input 8 remote signals (floating change over contacts) RS232-interface (Profibus, Modbus, SNMP optional) High MTBF values (400 000 h) User-friendly control functions with integrated processor (GR-3811) Temperature-regulated charging voltage 3 charging characteristics (automatic) Fanless design (natural air cooling by conv

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Technical data Rated voltage Rated current Rectifier design Galvanically isolated ,Thyristor 6-puls, >500A 12-pulse Input voltage Voltage output tolerance Charging characteristics IU acc. DIN 41772 3 characteristics (float, boost and equalizing charge) Ripple with battery disconnected <5% rms, <2% rms with additional filter Safety, Environment, Design Earth conductor current Protection type Permissible environmental conditions: Storage acc. EN 60721-3-1 (long term) Transport acc. EN 60721-3-2 (short term storage.) Operation acc. EN 60721-3-3 1K2 / 1M3 0 to +40 °C 2K2 / 2M2 -25 to +60 °C 3K3 /...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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