Need to know how energy on your site is used in detail? The Eltek GD90A and GD900A transmitters used with ND sub metering systems provides the solution. Analyse energy usage across large sites where power is distributed to a range of facilities and services and derive a best usage pattern.
The GD90A interfaces with the Northern Design NDRail350 (1 x 3 phase load) or NDRail310 (3 x single phase load) energy meters, providing comprehensive monitoring and patterns of use of a three phase supply. Information transmitted:
GD90A
The GD900A can be used with up to six parallel connected NDRail310 or NDRail350 energy meters and appropriate current transformers, providing comprehensive monitoring and patterns of use of multiple three phase supplies.
GD90A / GD900A
If you require sensors, please order them separately.
| Current transformer (one per phase) with 1m lead - other types available POA: | |||||
| Type | Range | Size (mm) | Cable diameter | ||
|---|---|---|---|---|---|
| SCL8-5 | 0-5A | 43 x 37 x 32 |
8mm |
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|
| SCL16-50 | 0-50A | 51 x 45 x 27 | 16mm | ||
| SCL16-100 | 0-100A | 51 x 45 x 27 | 16mm | ||
| SCT19-150 | 0-150A | 51 x 53 x17 | 19mm |  |
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| SCT32-400 | 0-400A | 82.5 x 85 x 27 | 32mm | ||
| SCT51-800 | 0-800A | 121 x 127 x 32 | 51mm | ||
| Other SCT19 models available: 5, 10, 15, 20, 30, 50, 70 and 100A - refer to Eltek Other SCT32 models available: 70, 100, 150, 200, 250, 300, 400 and 600A Other SCT51 models available: 600, 1000A |
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| DRA18-12 | DIN rail mounting AC to 12VDC power supply | ||||
|---|---|---|---|---|---|
| NDRail350 NDRail310 |
NDRail350 DIN rail mounting energy meter (1 x 3 phase load) NDRail310 DIN rail mounting energy meter (3 x 1 phase loads) See www.ndmeter.co.uk for more information. |
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This kit enables fitment of the transmitter's built-in wall bracket to difficult or uneven surfaces. The kit provides additional docking security.
The following products are supported:
WBG
| Model(s) | Sensors | Range |
|---|---|---|
| GD90A | 1 x RS485 modbus input for NDRail310 or NDRail350 energy meter | 3 x Current (up to 100A) phases 3 x power factor 1 or 3 Voltage phase Calculated values transmitted or derived for: kVA, kVAr and kW |
| GD900A | As GD90A but can connect to up to 6 x NDRail310 or 6 x NDRail350 meters |
| Isolation: | Fully isolated |
|---|---|
| Actual range: | Voltage 50% to 120%, current 0.2% to 120% |
| Frequency range: | 45 to 65Hz ( up to 30th harmonic at 50Hz) |
| Burden per phase: | Voltage or current <0.1VA |
| Accuracy (voltage or current): | To class 0.1 IEC60688 |
| Max Current: | Direct mode (not using CT) max current is 5A (operating under installation category II(IEC 61010-1) Indirect mode (using appropriately rated CT) up to 1000A |
| Dimensions: | 106 x 90 x 58mm (DIN rail mounting) |
| Display: | All values can be viewed via built in LCD and button panel |
| RF specification: | EN300-220 | |
| RF power: | 10mW | |
| Environment specification | ||
| Compliant to EN300-220: | -10 to +55°C | |
| Actual: | -30 to +65°C | |
| Humidity: | 100% non condensing | |
| Environmental rating: | IP40 | |
| Dimensions (footprint): | 78 x 41mm | |
| Transmission interval range: | 1 sec to 4 hours | |
| Indicator (red LED): | transmit active/on/off | |
| Control switch (concealed): | test mode / hibernate | |
| Antenna socket: | SMA | |
Gen II Quick Start Instructions
Energy monitoring datasheet (GD90A)
Energy monitoring multidrop datasheet (GD90A and GD900A)
