GEK-86105
TABLE
VIa
BURDENS OF INDUCTION UNIT COILS
--�r���p---;��� �
- -
------��f������� A�;b�v� ����s
_____
------;OWER
(AMPS)
TA?
AT
MINIMUM PICKUP (
WATTS FACTOR!
For
1. 0 - 3. 0 60
1
118. 4
50
1
98. 6
i
1.
5 - 4.5 60
1. 5
52.5
50
1.5
43.7
i
2. 5 - 7. 5 60
2. 5
18.8
!
50
2.5
15. 7
i
1
4,0
-
12
60
4
7. 4
50
4
6. 2
I
__ ----------------------------- ------------
forms 51 end up, the burden of the induction unit is
TABLE VIb
BURDENS OF INDUCTION UNIT COILS - FORMS
1-PTCKUP
____
I
RANGE
I
I
l
0 6 -
I
•
I
!
I
I
1.
5 -
l
I
I
I
1. 8
4. 5
:2. 5 - 7. 5
I
1
4.0 - 12
FREQ.
60
50
60
50
60
50
60
50
VO[f�AMPS-AT FIVE AMPS
CALCULATED FROM INPUT
TAP
AT
MINIMUM PICKUP
0. 6
110.75
0. 6
48.0
1. 5
17. 75
1. 5
11. 5
2. 5
6. 75
2.5
5. 75
4.0
4. 48
4.0
4. 05
SIX-CYCLE TIME DELAY TELEPHONE RELAY
15. 2
0. 13
12. 7
0. 13
6. 7
0.13
5.6
0.13
2.5
0.13
2. 1
0. 13
0. 95
0. 13
0. 79
0.13
as shown in Table
51
AND UP
IMP. POWER
OHMS FACTOR
4. 43
0.32
1. 92
0.33
0. 71
0. 35
0.46
0. 37
0. 27
0. 44
0. 23
0. 47
0. 18
0. 52
0.16
0. 47
Vlb:
As mentioned, the telephone relay, OX, has a six-cycle time delay after it is
energized through the high-dropout instantaneous contacts.
The operating time of
this circuit, therefore, is determined by the time delay of the telephone relay.
STANDARD INSTANTANEOUS UNIT
The standard instantaneous unit is an electromagnet that attracts a hinged armature
when sufficient current is applied.
The armature carries a
"T"
shaped moving
contact that bridges two stationary contacts when the coil is energized.
A
7
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