GR(D)

The TECNED GR(D) series is a high-performance industrial rectifier and battery charger system engineered for reliable DC power supply applications requiring continuous operation, stable output performance, and advanced system supervision. Designed for demanding industrial environments, the GR(D) series provides regulated DC power with IU charging characteristic according to DIN 41773, ensuring precise voltage regulation and optimized battery management.

Available with output voltages from 24 Vdc up to 650 Vdc, the GR(D) series is suitable for a wide range of critical applications including power plants, substations, railways, airports, underground transportation systems, chemical plants, mining operations, and heavy industrial facilities.

The system is equipped with an advanced microprocessor-based control platform for monitoring and management of rectifier and battery functions. The integrated LCD display provides real-time information including output voltage and current, battery charge/discharge status, mains values, alarm conditions, system settings, and diagnostics for efficient supervision and simplified maintenance.

Designed as a complete industrial DC power solution, the GR(D) series can be integrated into standalone DC backup systems, process technology equipment, and DC distribution systems for mission-critical industrial processes requiring high reliability and long operational life.

Key Features

• Regulated IU charging characteristic according to DIN 41773

• Output voltage range from 24 Vdc to 650 Vdc

• Advanced microprocessor-based monitoring and control

• LCD display with real-time system diagnostics

• Stable output voltage regulation within ±1%

• Complete industrial DC power supply solution

• Standalone DC backup system capability

• Optional DC distribution panel integration

• Designed for continuous industrial operation

• Suitable for harsh and demanding environments

GR(D) Specifications

1- INPUT
Input voltage single phase		110 / 120 / 200 / 220 / 230 / 240 / 277V, (2W+E)
Input voltage three phase		208 / 220 / 240 / 380 / 400 / 415 / 480V, (3W+E)
Input voltage range		15%/-20% (20% start battery operation
nominal input frequency	[Hz]	50/60
allowable frequency range	[Hz]	40-70
input current THD	[%]	<10
power factor	PF	0.98
overall efficiency	[%]	Up to 95% (depending on DC bus voltage)
galvanic isolation		Yes (input isolation transformer)
2- OUTPUT
nominal output voltage	[Vdc]	24, 48, 60, 110 (125), 220 (240), 380 Vdc
Battery charging characteristic		IU (DIN 41773), T° compensated Battery charging characteristic floating voltage
DC voltage range	[Vdc]	24 – 380Vdc
Float charge setting (Cell)	[Vdc]	1.40-1.42V for Ni-cd or 2.17 -2.27V for Lead acid
output current I-nominal	[A]	10A to 600A (depending on DC voltage level)
battery charge current setting	[%]	0.1C to max current
output voltage regulation	[%]	< 1 ( 0.5% static)
load step response time	[ms]	< 200 (0-to 100%)
ripple voltage (without battery)	[%]	<5% with 1Ph input / < 2% with 3Phase input
current limiting	[%]	Yes
current accuracy	[%]	2%
long-term stability	[%]	0.15% for 1000 Hrs
3 – PROTECTION
soft start inrush current limit
input	(AC)	short circuit protection by MCB
input	(AC)	overload protection electronically limited
output	(DC)	short circuit protection by Fuse/ MCB
output	(DC)	overvoltage alarm (DC high) / auto-off / manual reset
battery overload/short circuit protection by Fuse/ MCB and battery low voltage alarm
4 – BASIC USER INTERFACE
LED lamp Operation ( green) LED lamp Battery Operation (yellow) LED lamp General Failure (red) LED lamp DC high alarm (red) LED lamp DC low alarm (red) LED lamp Utility Failure (red) LED lamp Fan Failure (red) (when applicable) button on button off button buzzer off button lamp test
5 - EXTERNAL CONTACT (max 250VAC or 30VDC / 2A)
Potential free contacts: general alarm / Utility failure / DC low / DC high
6 - ENCLOSURE
Type	: Floor standing cabinet with front door acccess / Aluzinc frame
Finish	: Powder coat RAL 7035
Dimensions	: From 1800 x 600 x 600 to 2000 x 800 x 800 mm per assembly (depending on rating)
Weight	: Up to 650 Kg per assembly (depending on rating)
Protection	: standard IP 20 (Option up to IP 65)
7 – STANDARDS
ISO9001	: Quality management systems
IEC- 60146	: Semiconductor converters – General requirements and line commutated converters
EMC 55011	: Industrial, scientific, and medical (ISM) radio-frequency equipment—Radio disturbance characteristics—Limits and methods of measurement; Amendment A1:1999 to EN55011:1998.
IEC- 62040-1	: Uninterruptible power systems (UPS) Part 1: General and safety requirements for UPS
IEC 61000-3-12	: Electromagnetic compatibility (EMC) – Part 3-12: Limits -Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current>16 A and ≤ 75 A
IEC/61000-6-5	: Low voltage AC Surge 1.2/50 μs, 2 kV line to ground,1 kV line to line (equipment installed in power stations and MV substations. Low voltage DC Surge 1.2/50 μs, 2 kV line to ground, 1 kV line to line
8 – ENVIRONMENT
storage temperature	: -25 to + 70 °C
operating temperature	: -10 to + 40 °C
humidity	: max. 95%
installation altitude	: < 1000 meter at full rate
derating	: 7% per 1000 meter to 4000m
audible noise	: 50 to 65 dBA (depending on cooling)
9 – TECHNOLOGY
High power factor IGBT/SCR conversion technology with very low input THDI and build-in galvanic separation transformer. Charging characteristic according DIN 41773 (UI) High reliable due to failsafe control system and protection circuits