INSTRUCTIONS
GEH-2024A
SUPERSEDES
GEH·2024
MULTICONTACT AUXILIARY
RELAY
Type HFA51
DESCRIPTION
INTRODUCTION
The HFA51A and HFA51B relays are instant
aneous, hinged armature, multi-contact, auxiliary
relays. They have six electrically separate contact
circuits adaptable for either circuit opening or
circuit closing application. This arrangement per
mits a number of operations to be performed
simultaneously.
The HFA51A and HFA51B relays are available
for front or back connection.
The front con
nected relays are suitable for surface mounting
only.
peres continuous
or
30
amperes for one minute.
Table II lists the non-inductive interrupting capacity
of each contact.
TABLE I
Code No.
60
51
42
33
24
15
06
Position No.
Contact
1
a
a
a
a
a
a
b
2
a
a
a
a
b
b
b
3
a
a
b
b
b
b
b
4
a
b
b
b
b
b
b
5
a
a
a
b
b
b
b
6
a
a
a
a
a
b
b
The back connected relays are suitable for
either surface mounting or semi-flush mounting; a
Note: a
=
Normally Open
b
=
Normally Closed
steel flange is necesssary for the latter. There are
two types of flanges available: one provides mount-
TABLE
II
ing with normal cover; one provides mounting with
the drawout-case type cover.
CHARACTERISTICS
The HFA51A relay is self reset and has an
instantaneops dropout.
The HFA51B relay is hand reset by means of a
plunger assembly installed through the transparent
cover.
Unless the relays are ordered with a specific
contact arrangement, they will be shipp�d with six
circuit closing contacts (Code
60).
The contact
arrangement can be easily changed to provide any
of the combinations shown in Table I.
RATINGS
DC
AC
Volts
Volts
12
30
115
30
24
15
230
20
32
1
0
460
15
4
8
8
575
1
0
1
2
5
3
250
1
8URDENS
The burdens are measured with the relay in
the picked up position and at rated voltage are listed
in Table
III.
TABLE
m
The Type HFA relays are available with coil
DC COILS
AC COILS
r
,5
a
atings for standard voltages up to 575 volts at 25,
Watts
Freq.
Volt-
0,
or
60
cycles and up to 250 volts d-e.
Cold
Hot
Cycles
Amperes
Watts
7.8
6.0
25
10
4
The current closing rating of each contact is
30
5
0
23
9
mperes. The current carrying rating is 12 am-
60
32
12
Theae inatruction1 do not purport to cover all detail• or variation• in equipment nor to provide for every pouible
contingency to be met in connection with inllallation, operation or maintenance. Should further information be deaired
or ahould particular problema ari�& which are not covered wfficiently for the purchaaer'• p41rpoae•, the maHer mould
be referred to the Generol Electric Company.
LOW VOLTAGE SWITCHGEAR DEPARTMENT
GENERAL
.
ELECTRIC
PHILADELPHIA, PA.
www . ElectricalPartManuals
. com
www
. ElectricalPartManuals
. com
