The NORATEL Earth-Leakage guard - ELG -
The Noratel Earth-Leakage Guard ELG monitors the dielectric resistance between the two isolated energized pins of the output jack and its neutral conductor.
The commonly in households used protective equipment like residual-current-operated protective devices (RCD) are, because of the galvanic isolation in principle not able to recognize an insulation failure on the secondary side of the IMED transformer.
If an insulation defect occurs in the power supply of a medical system it normally would not be detected and generates a high potential risk for the patient and staff.
The earth leakage guard eliminates this security vulnerability. In case of defect the ELG signals an optical and acoustic warning.
The resistance is monitored. If the minimum level of 50 kOhm is short fallen, an optical (LED) and acoustic (Beeper) signal is triggered.
The ELG is directly connected to one of the output plugs of the IMED transformers. Its function is solely to signal isolating failures. The ELG is exclusively approved in combination with the Noratel IMED transformers.
ELG - technical data:
| Dimensions L x W x H: | 193x33x56 mm |
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| Operating voltage: | 230V AC |
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| Protection class: | Class 1 / IP40 |
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| Medical grade: | Class 1, Type B |
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| Isolation class: | ta 40 °C/B |
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| Conformity acc. to: |
EN60601-1, EN60601-1-1, |