GARD – Installation, Operation and Maintenance Manual
A l e n c o n S y s t e m s L L C - P a g e
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4.3 GARD Specifications
Overall Device Capabilities
Fault Detection and Interruption
Combined Ground and ARC fault detector and
interrupter/disconnect for PV strings
Max Voltage Rating Per Input (Voc)
1000 VDC
Operating Voltage Range
200 – 1000 VDC
Max Current Rating Per Input
25A
Short Circuit Current Per Input (Isc)
30A
Number of Individual Inputs
4
Communication
Modbus TCP via Alencon Communications
Environment (ACE)
Fault Detection and Disconnect Level
Faults are detected per input, i.e. PV string level
Fault Latch
Yes
Disconnect
Yes
Reset
Yes
Fault/Status indicators
Yes
Ground Fault Detector Capabilities
Common grounding
Negative / Positive
Ground fault current trip levels
Configurable from 500 mA to 1 A
Overvoltage Class
OV II
ARC Fault Detector Capabilities
Insulation
> 3000V
Self Input Test
Yes
ARC Detect Output
Yes
Photovoltaic DC Arc – Fault Circuit –
Protection
Type 1
Power Supply
Internal On Board
+24 V
Indicators
Power ON
Red
LED
Channel status (4)
Green
– Relays Closed
Red
– Relays disconnected
Controls
Stop
Local E-STOP, Global E-STOP, Modbus command
Reset
Local Reset, Modbus command
Standards & Compliance
Certifications
UL1741, CSA C22.2#107.1 (Ground Fault),
UL1699B (Arc Fault)
Environmental
Storage Temperature
-40°C to 60°C
Environmental Rating
NEMA 3R & IP 36
Cooling
Convection
Humidity
0 – 95 %
Operating Ambient Temp.
-30°C to 50°C
Pollution Degree
PD III
Physical Characteristics
Size (H x W x D)
.46 M × .37 M × .17 M
Weight
10.5 kg
