GE DIAC 66K, Instruction Manual

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4-
2
DIAC Type 66K Digital Overcurrent Relay GE Power Management
4 HARDWARE DESCRIPTION GEK-106621
4
†
Volt-Amperes at five amps calculated from input at minimum pickup ( I
2
Z ).
4.4 TARGETS AND INDICATORS
The yellow pick-up LED, will come on solid for the TOC function when the input current to the relay is higher
than the set point. The location of the LED is between the frequency/reset switch and the IOC pickup level
switch.
It may be desirable to know when the relay is powered up and operating. The relay must be energized at or
above 95% of the minimum possible setting and below pick-up set point. To activate, turn the SELECT switch
one step clockwise or one step counterclockwise. This will cause the pickup LED to blink at 4 second intervals
while current is below the pick-up set point. Minimum current is 95% of minimum TOC pickup setting for both
the 1amp and 5 amp models. A blinking LED indicates the microprocessor is executing code and outputting
signals.
The relay uses a target and seal-in unit as its TOC/IOC tripping element. And the relay uses one target for the
high set standard IOC unit. The targets are mechanically latched when the function trips. The TOC/IOC con-
tacts will remain closed until the trip circuit current drops below 0.19 or 2.0 Amps, depending on the Seal-In tap
setting.
NOTE: The current will continue conducting through Stud 1 to Stud 10 while the trip signal is still
being sent to the TOC/Inst. Unit.
Table 4–1: DIAC 66K BURDEN DATA
Pickup
Range (A) Frequency
(Hz)
Amps
Volt-Amps
† Impedance
(
Ω
)
Power
Factor
0.5 to 2 50 5 310 12.4 0.84
60 5 330 13.2 0.78
1 to 4 50 5 94 3.75 0.77
60 5 100 4.0 0.71
2 to 8 50 5 23 0.94 0.77
60 5 25 1.0 0.71
4 to 16 50 5 5.8 0.23 0.77
60 5 6.2 0.25 0.71
10 to 40 50 5 0.9 0.04 0.77
60 5 1.0 0.04 0.71
20 to 80 50 5 0.23 0.01 0.77
60 5 0.25 0.01 0.71
40 to 60 50 5 0.07 0.003 0.71
60 5 0.07 0.003 0.71