Multi-Stage System of Suppression
S•A•D Hybrid Technology
The Liebert Hybrid Advantage is the first hybrid product in the industry to offer a true, coordinated
Other "hybrid" products fall into one of two categories:
Oversized components: Large components allow the system to deal with nominal line voltage, as a result clamping levels increase, defeating what it is designed to do.
Typical Hybrid Advantage Surge Current Sharing Data
Hybrid SAD Module | Interceptor MOV Module |
| 100.0 |
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| 90.0 |
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(%) | 80.0 |
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Current | 70.0 |
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60.0 |
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Surge |
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50.0 |
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of |
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Percentage | 40.0 |
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30.0 |
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20.0 |
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| 10.0 |
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| 0.0 |
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| 0 | 5,000 | 10,000 | 15,000 | 20,000 | 25,000 | 30,000 |
Total Surge Current (Amperes)
The Liebert Answer:
The transitional method
Our answer lies in a
First, a solid state comparator network actively switches the SAD components out of the transient control circuit when exposed to line voltages in excess of their Maximum Continuous Operating Voltage (MCOV). While SAD components are removed from the system, an appropriately sized transient control network is available for continued protection. During this disconnect phase, the nominal levels are continually monitored until the system voltage is stable, at which point the SAD circuit is brought back on line.
Second, a regulated amount of high- energy surge current is transitioned to the secondary MOV suppression modules. This is accomplished through an impedance matching network utilizing a series of controlled copper geometries in conjunction with custom engineered
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