GEI-68720
CHARACTERISTICS
The HFA54 relays are multi-contact auxiliary relays, some of them available
with the additional feature of both electric and hand reset. The hand reset feature
is accomplished with a plunger assembly installed through the transparent cover.
Some of the stationary contacts (called long wipe
)
are built with a special
offset so that when a circuit-opening contact and circuit-closing contact are used
as a pair, a make-before-break circuit results. The use of these contacts requires
an additional strong contact spring to minimize contact bounce and ensure contact
overlap. These contacts are designated as long-wipe contacts.
Unless the relays are ordered with a specific contact arrangement, they wi
11
be
shipped with six (6) circuit-closing contacts (code 60) .
However, the HFA54 D and
HFA54 K relays are available with contact code 33 only, as given in Table V.
The general characteristic of HFA54 relays are summarized in Table II.
TABLE I I
No.
Model
Separate
Additional
Contact
No.
Contact
Characteristics
Arrangement
Circuits
Table
HFA54 B
5
Hand Reset
III
HFA54 C
5
Hand Reset and
III
Mechanical Target
Wl
lapping Contacts in
Positions 2 and 3
HFA54 E
5
--
-
-
--
III
HFA54H
6
Hand
R eset
IV
HFA54 J
6
Hand R eset and
IV
Mechanical Target
HFA54 K
6
Hand Reset with Over-
v
lapping Contacts in
Positions 2 and 3
HFA54 L
6
--
----
IV
HFA54M
4
R elay Contact #3 Opens
VI
Operating Coil when
Relay Picks Up
HFA54 N
4
S i mil i a r to 5 4M
VI
except with Additional
Feature of Hand Reset
4
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