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| SWARTZ® High
Resistance
 PDF Cutsheet
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(Click on image for enlarged view) |
The SWARTZ® Type 64 Structure Ground Relay from
SMC provides dual functions for high resistance ground DC switchgear. The relay is
designed to protect equipment enclosures and alert personnel to "ground" and
"hot" fault conditions in DC switchgear and rectifiers. These high resistance
relays provide superior performance and operational reliability through solid state
components, rugged construction and self-diagnostic features.
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 | Draw out construction |
| LED Meter - Accurate, easy to read |
| Transient Surge Protection |
| Detects AC or DC "hot structure" faults |
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| Internal Power Supply operates on and auto-compensates for a wide range of DC inputs |
| Internal Time Delays to prevent nusiance tripping |
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The SWARTZ® Type 64 High Resistance Structure Ground Relays
alert personnel visually and through alarm output contacts when a DC switchgear structure
or rectifier becomes grounded through a breach in the insulation. Annunciation occurs when
the voltage sensing trip system has been by-passed by grounding or when the relay's
self-diagnostic feature determines that an internal failure has occured. The relay also
alerts personnel when a leakage or fault occurs between the bus and structure ("hot
structure"). Normally, the output is connected to a lockout relay to automatically
de-energize the entire station. The not structure function detects both AC and DC leakages
and faults. Setpoints for ground structure annunciation and hot structure trip are
adjustable. Test buttons for both ground structure annunciation does not occur, the
Sturcture Ground Relay will provide continuous operation if voltage does not exceed 800
VDC or 700 VDC with 600 VAC superimposed (rectifier faults).
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| Input Power:Operates on 24 - 125 VDC |
| Supply Current: 40 mA at 125 VDC 200 mA at
24 VDC |
| Ambient Temperature:-20°C to +55°C |
| Design Test:SWC ANSI/IEEE C37.90 |
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| Isolation Dielectric:5400 V, 60 Hz, 1min. |
| Threshold Setting Error:+ .5 mV |
| Isolation Error:+ 1 mV |
| SCR Output:100 mA to 6 A (1 sec.) 200V |
| Annunciation:Reed Relay 100 VA, 2A, 500
VDC |
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| Block Diagram
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Case Dimensions
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