Construction And Cirguitry - GE RPM11A Instructions Manual

GEH-2030
CONSTRUCTION AND CIRCUITRY
The operating magnet of all these relays is a curved solenoid called a rotonoid and is designated
as TU. Its armature is able to rotate through approximately 180 degrees. The rotonoid winds up a spiral
spring from which is obtained the energy to drive the main shaft. Mounted on the main shaft are the circu-
lar calibrated time dial and two insulated cams for operating the timing contacts, TU2 and TU3. Also con-
nected to the main shaft through a set of spur gears is a magnetic damping element for regulating the speed
of operation. This element consists of a copper cylinder rotating in an annular air gap across which ex-
ists a permanent magnetic field. The relative position of the cylinder in the air gap determines the amount
of damping obtained.
The insulated cam on those relays which have a maintained second zone is such that when the second
zone contact (TU2) is closed, it remains closed until the relay completely times out. The insulated cam
on the relays which do not have a maintained second zone hold the TU2 contact closed only for the length
of time stated in Table 1.
The third zone contact (TU3) is maintained on the continuously rated relays. This is accomplished by
adding to the intermittently rated relay a telephone unit designated TV. The continuous rating of the
RPM14 is achieved when TV operates to open the rotonoid (TU) circuit yet does not affect the TX circuit.
As long as TX and TV are picked up, TU3 will be maintained.
The time dial of the three second relays is calibrated in tenths of a second, while the time dial of
the one second relays is calibrated in cycles (60 cycle basis) with graduations of 2.5 cycles.
Table 2 lists the circuit resistance for the various relays covered by these instructions.
RELAV
VOLTS
TU
250
100
>-
220
100
-'
In
~ >-
z
<I:
ILl
-'
125
100
~
ILl
~ IX
...
::E
C
IX
ILl
ILl ~
110 100
~ <I:
Z IX
...
48
6.5
24 6.5
250
100
220
100
In
>- >-
-' <I:
. In
-'
:::l
ILl
125
100
0
IX
:::l
z
...
~
c
Z
ILl
110 100
0
!q;
u
IX
48
6.5
24
6.5
R1
300
250
100
75
13.5
3
300
250
100
75
13.5
3
TABLE 2
CIRCUIT RESISTANCE
Resistance
TX
R2
3700
2500
550
3000
2000
550
3700
1200
550
3000 1000
550
340
95
130
340
45
130
3700
2500
550
3700 2000
550
3700
1200
550
3700
1000
550
340
95
130
340
45
130
5
R3
+
TV
R4
1200
-
-
2500
1000
-
-
2000
None
-
-
None
-
-
45
- -
95
None
- -
1200 7500
7500
2500
1000 7500 7500
2000
None 7500
None
None 7500
None
45 425
425
95
None 425 None
"