41-923.4M
6
shown in figure 6.
The pick-up value of the overcurrent unit can be
changed from the factory adjusted value of 0.5
amperes to any value up to 1 amp. by increasing
spring restraint.
4.0 SETTINGS
There are not settings to be made
5.0 INSTALLATION
The relays should be mounted on switchboard pan-
els or their equivalent in a location free from dirt,
moisture, excessive vibration, and heat. Mount the
relay vertically by means of the four mounting holes
on the flange for semi-flush mounting or by means of
the rear mounting stud or studs for projection mount-
ing. Either a mounting stud or the mounting screws
may be utilized for grounding the relay. The electrical
connections may be made directly to the terminals by
means of screws for steel panel mounting or to the
terminal studs furnished with the relay for thick panel
mounting. The terminal studs may be easily removed
or inserted by locking two nuts on the stud and then
turning the proper nut with a wrench.
The carrier relaying schematic (supplied with the car-
rier order) should be consulted for details of the
external connections of these relays.
6.0 ADJUSTMENTS & MAINTENANCE
The proper adjustments to insure correct operation of
this relay have been made at the factory. Upon
receipt of the relay, no customer adjustments, other
than those covered under “SETTINGS”, should be
required.
6.1.
ACCEPTANCE CHECK
The following check is recommended to insure that
the relay is in proper working order.
6.1.1.
Overcurrent Unit
Pass 0.5 amperes of altered current through relay
terminals 16 and 17, the contact should pickup within
.475 and .525 amp.
6.1.2.
Auxiliary Units (CSP and CGS)
Each contactor switch has a section of a tapped
resistor in series with it, and will pick up positively
when rated control voltage is applied across the coil
and its section of the resistor.
These units should operate at 24 volts for the 48-volt
relay, 60 volts for the 125-volt relay, and 120 volts for
250-volt relay. These units have an intermittent rat-
ing, and should not be energized for more than a few
seconds.
6.1.3.
Operation Indicator (OI)
With the polar unit contacts closed, apply direct cur-
rent to the operation indicator relay terminals. The
operation indicator should pick-up and drop the indi-
cator target between 1 ampere and 1.2 amperes dc.
For Use With KR-Set
48V
Avg.
Ohms
125
Avg.
Ohms
250
Avg.
Ohms
CSP or CSG Coil
CSP & CSG Tapped Resistor
Carrier Resistor
RRT Operating Coil
RRT Coil Resistor
RRH Holding Coil
AL-Alarm Coil
Operation Indicator (1 amp.)
Squelch Unit Coil
Squelch Unit Adj. Resistor
27
200
2000
1100
1320
1700
500
0.1
3300
-
27
600
3750
1100
5000
1700
500
0.1
3300
8500
435
6000
19000
1100
11200
1700
500
0.1
3300
1500
For Use With TC-Set
CSP or CSG Coil
CSP & CSG Tapped Resistor
Carrier Resistor
RRT Operating Coil
RRT Coil Resistor
RRH Holding Coil
AL-Alarm Coil
Operation Indicator (1 amp.)
Squelch Unit Coil
Squelch Unit Adj. Resistor
27
200
1000
1100
1320
20
4
0.1
3300
-
27
600
3750
1100
5000
20
4
0.1
3300
8500
45
6000
-
1100
11200
20
4
0.1
3300
15000
For Use With TA-3 Tones
CSP or CSG Coil
CSP & CSG Tapped Resistor
Carrier Resistor
RRT Operating Coil
RRT Coil Resistor
RRH Holding Coil
AL-Alarm Coil
Operation Indicator (1 amp.)
Squelch Unit Coil
Squelch Unit Adj. Resistor
27
200
200
1100
1320
1700
500
0.1
3300
-
27
600
4000
1100
5000
1700
500
0.1
3300
8500
435
6000
10600
1100
11200
1700
500
0.1
3300
15000
Summary of Contents for KA-4
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