General Electric HGA Series overview
General Electric HGA Series Hinged Armature Auxiliary | Eaton Fuse Holders, Circuit Protection Molded case with 4 mounting optionsDrawout case available Applica...
Product details
Manufactured byGeneral Electric
Product groupModules
DescriptionGeneral Electric HGA Series Hinged Armature Auxiliary | Eaton Fuse Holders, Circuit Protection
Features and BenefitsMolded case with 4 mounting optionsDrawout case available ApplicationsContact multiplication
Protection and ControlStandard, low and variable time pickup availableAC undervoltage (low dropout)
Typical ApplicationsThe HGA hinged armature auxiliary relays are designed to provide additional contacts, higher contact carrying and interrupting ratings, timing, interlocking, electrical separation, or other auxiliary functions.Where more than two circuits are to be controlled, the coils of two or more relays may be connected either in parallel on AC or in series or parallel on DC to obtain the desired results.
General-Purpose RelaysStandard Pickup: The HGA11 is the standard auxiliary relay which is instantaneous in operation and is used for auxiliary functions where intentional delays of over 1-1/4 to 2 cycles are not required and where standard pickup values, as listed in the table, are satisfactory.The contact arrangement for each relay (or unit) is doublepole, double-throw (2 normally open, 2 normally closed).Low Pick-up: The HGA14 relay has been designed with a shorter armature gap which is obtained by the setting of an adjustable back contact. This construction allows a lower pickup value than normal and a faster pickup time. Also, relays are available for tripping duty and target operation with pickup times of 1/2 cycle on a 60-cycle basis, and are intermittently rated.The contact arrangement is one single-pole, double-throw contact and one normally open contact for each relay (or unit). The second normally closed contact is not used with the low pickup setting. This second contact can be used if the wipe is restored to normal and the control spring tension increased thus raising the pickup toward the 80 percent (60 percent DC cold) level which would apply with standard gap relays.
AC UndervoltageLow Dropout. The HGA14BH(-)A relay is a three-phase residual voltage relay with low dropout. A primary application is as on automatic throw over schemes where induction motors are the principal load.
Time-Delay RelaysFixed-time Dropout. The HGA17 is designed to provide a time-delay dropout of approximately 15 cycles (60-cycle basis). The delay is obtained by momentarily sustaining the magnetic flux at the relay pole face by means of induced currents in a copper ring which acts as a shorted one-turn coil. A small delay in pickup time is also obtained since the induced currents also tend to retard the buildup of the relay magnetic field. Operating times are measured at or from rated voltage or amperes for pickup and dropout times respectively.Adjustable-time Pickup: The HGA14D has a resistor-capacitor timing circuit with the resistor being adjustable to vary the charging time of the capacitor which is connected across the relay operating coil.Contact arrangement for the fixed-time dropout (HGA17) is one single-pole, double-throw contact and one normally open contact per relay (or unit).
Relay CharacteristicsVoltage or Current Pickup Values. The values listed in the table below apply as indicated for all relays.
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| # | Name |
|---|---|
| 1 | HGA |