File:Zellweger ZE 22-3 Ripple receiver relay 1050 Hz.JPG
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Summary
| Description | |
| Date | |
| Source | Own work |
| Author | RODALCO |
Remotely operated ON OFF switch for the control of hot water, heating, metering and streetlights. Frequency is 1050 Hz superimposed upon the 50 Hz mains frequency. This device was used to control a 3 kW hot water system in Auckland, New Zealand
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:44, 12 April 2012 | | 1,200 × 1,600 (547 KB) | RODALCO |
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