What is the "end part number" on each Albright DC contactor label
called?
This "suffix" number is called a "precise identity number" which
identifies that specific Albright DC contactor number with a specific
customer and contactor special features. |
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What is the difference between intermittent and continuous duty?
Intermittent and Continuous duty is terminology used to describe the
coil ratings: Continuous Duty (C.O. or C.W.) 100% duty Cycle. Consumes
less power to maintain the closed contact, when compared to the
intermittent equivalent, return spring not as torque. Excellent for
applications where extended periods of operation are required, for
example a U.P.S. system.
Intermittent Up to 70% duty Cycle. Up to 15 minutes maximum
continuous energization. Intermittent off a powerful coil allowing
strongest return spring to be used, giving best switching
characteristics for applications such as fork lift trucks, EV, and
mobility products. |
What types of coil configurations do you have?
"CW"= Continuous Wound, rated for 100% Duty Cycle, "Intermittently
Wound"= 70% Duty Cycle, "Prolonged Wound"= 90% Duty Cycle.
Continuously
wound contactors are identified by CO written on the label |
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What is the operating temperature range of Albright Contactor?
The typical ambient temperature that the contactors can be operated
within is from -40 Degrees C to +60 Degrees C in a 90% non condensing
humidity.
The expected coil temperature rise will be approximately up to +70
Degrees C. This statement applies to all Albright contactors.
For storage: Albright typically states that the contactors can be stored
up to +80 deg C, in a dry / clean environment. |
What does VI mean on my contactor?
VI stands for Vacuum Impregnation. Vacuum impregnation is a process
employed by Albright for applications where there is a high degree of
shock and vibration. Simply the coil is wound and then immersed in a
substance (top secret substance) that binds the winding and makes it a
solid core; it then limits damage to the coil brought about by shock and
vibration. |
What are Magnetic Blowouts?
Rare Earth Magnets molded into the top cover which produce magnetic
fields which act on the main contact arcing, thereby extinguishing the
arc outwards. This is particularly true in the case of "Inductive
Loads". |
What is the Mechanical Life Expectancy of a contactor?
Based on a Mechanical Switching Formula located under the specifications
section. Generally speaking, Mechanical Life of the contactor is based
on type of load being switched along with the frequency of main contact
switching-(duty cycle). For Severe Load Switching applications, the
expected MTBF is between 1-1.5 million cycles. For Infrequent Light Load
Switching-between 2.5-3 million operations.) |
What is the worst type of load to switch?
Inductive Loads First, Capacitive Loads Second, Resistive Loads are the
most forgiving loads to switch. |
What is the function of an Armature cap?
The armature cap fits over the exposed end of the Magframe where the
base of the armature can be seen. This is to prevent the possible
contamination entering this part of the contactor and effectively
seizing the movement of the armature.
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What is "HOT" versus "COLD" switching
Hot switching means closing the main contacts directly on the load,
versus Cold switching means first closing the main contacts before
switching the load.-The worst load switching is "HOT" switching of
Inductive type loads).
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