I.L. 41-748.1F
13
7.5.
INDICATING CONTACTOR SWITCH (ICS)
No setting is required on the ICS unit except the
selection of the 0.2 or 2.0 ampere tap setting. This
selection is made by connecting the lead located in
front of the tap block to the desired setting by means
of the connecting screw. When the relay energizes a
125 volt or 250 volt dc type WL relay switch, or equiv-
alent, use the 0.2 ampere tap. For 48 volt dc applica-
tions set ICS in 2 ampere tap and use Style
#304C209G01 type WL relay coil or equivalent.
7.6.
UNDERVOLTAGE UNIT
The voltage unit is calibrated to close its contact
when the applied voltage is reduced to 53 volts. The
voltage unit can be set to close its contacts from 40
volts to 70 volts by adjusting the resistor located in
the rear, second from the bottom. The spiral spring is
not disturbed when making any setting other than the
calibrated setting of 53 volts.
7.7.
DIRECTIONAL SETTING
There is no setting to be made on directional unit.
Tabulated Settings
Z
M
L Lead
R Lead
0.87 TS
0.89 TS
0.92 TS
0.94 TS
0.97 TS
TS
1.03TS
1.06 TS
1.1 TS
1.14 TS
1.18 TS
+.15
+.12
+.09
+.06
+.03
0
+.03
-.06
-.09
-.12
-.15
Upper .06
Upper .06
Lower .06
Upper .06
.03
0
0
Lower .06
0
.03
0
0
.03
0
Lower .06
0
0
.03
Upper .06
Lower .06
Upper .06
Upper .06
Table 1:
RECOMMENDED SETTINGS FOR KLF RELAY
ZONE 1 (ALONE)
ZONE 2 (ALONE)
BOTH ZONE 1 & ZONE 2
IMPEDANCE SETTING
See Figure 11
See Figure 12
See Figure 11 & 12
VOLTAGE SETTING
(a) Contact shorted or
(b) Set at 80% for security
80%
Zone 1 voltage contact
shorted with Zone 2 set
at 80%
TD-1
1/4 to 1 sec
(1 sec preferred)
1/4 to 1 sec
(1 sec preferred)
Zone 1 timer = 1/4 sec
Zone 2 timer = 1 sec
TD-2
Not required for
(a) above. For
(b) above use 1 min.
1 min.
1 min.
ADVANTAGES
Less sensitive to
stable system swings
1) More sensitive to
LOF condition
2) Can operate on
partial LOF
3) Provide alarm features
for manual operation
(1) Same as (1), (2) and
(3) at left.
(2) Provides back-up
protection
Table 2:
SPECIAL SETTINGS FOR MULTI MACHINES BUSSED AT MACHINE TERMINALS
ZONE 1 (ALONE)
ZONE 2 (ALONE)
BOTH ZONE 1 & ZONE 2
IMPEDANCE SETTING
See Figure 11
See Figure 12
See Figure 11 & 12
VOLTAGE SETTING
(a) Contact shorted or
(b) Set at 87% for security
87%
Zone 1 voltage contact
shorted with Zone 2 set at
87%
TD-1
1/4 to 1 sec
(1 sec preferred)
1/4 to 1 sec
(1 sec preferred)
Zone 1 timer = 1/4 sec
Zone 2 timer = 1 sec
TD-2
Not required for (a) above
(a) above. For
(b) above use 10 sec for
cond. cooled, 25 sec
for conv. cooled
10 sec for cond. cooled.
25 sec for conv. cooled.
10 sec for cond. cooled
25 sec for conv. cooled
