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GenPro
Power Services
P.O.
Box 1116
Rapid City, South Dakota 57709-1116
Sales Contact:
Toll Free: 888.861.8984
Ph: 605.341.6160
Fax: 605.341.9791
Contact
Us
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| ZENITH ZTGD DELAYED
TRANSITION SERIES
AUTOMATIC TRANSFER SWITCH |
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Description
GE Zenith Controls' ZTGD
Series switches are built for delayed transition applications that
require the dependability and ease of operation found in a power
contactor switch.
The delayed transition switch
offers an adjustable time delay during transfer from one position to
another. This is primarily for transfer of large motor or inductive
loads, and allows these loads to re-energize after transfer with
only normal inrush starting currents.
The ZTGD Series incorporates
all the important features of the standard ZTG Series in a unique
design. The operation of the delayed transfer switch is totally
independent of the synchronism of the power sources, eliminating the
need for in-phase monitors or extensive motor disconnect control
wiring between the transfer switch and motor control centers.
Features and Benefits
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Close differential under-voltage sensing of the normal source
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Voltage and frequency sensing of the emergency source
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Test
switch (fast test/load/no load) to simulate normal source
failure - automatically bypassed should the emergency source
fail
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Mechanically interlocked center-off position for load decay
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Electrically operated, mechanically held by a simple,
over-center mechanism
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Segmented silver tungsten alloy contacts with separate arcing
contacts on 600 amps and above
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Arc
quenching grids, enclosed arc chambers and wide contact air gap
for superior source-to-source isolation on all units
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Product Scope
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Ratings 40 to 3000 amperes
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2, 3
or 4 poles
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Double throw, mechanically interlocked contactor mechanism
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Available in ZTG (standard) or ZTGD (delayed transition) models
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Suitable for emergency and standby applications
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UL
1008 listed at 480 VAC
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CSA
certified at 600 VAC
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IEC
947-6-1 listed at 480 VAC
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Open
type, NEMA 1, 3R, 4, 4X and 12
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Corporate Headquarters
GenPro
Power
Services
2121 Rand Road, PO Box 1116, Rapid City, SD
57709-1116
Ph: 605-341-6160 Fax:
605-341-9791
www.genpropower.com
© 1997-2008 GenPro Power
Services - All Rights Reserved
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