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6 ACCEPTANCE/PERIODIC TESTS
The TOC Alarm unit Is designed to operate an external alarm unit or auxiliary relay which can draw a maximum
of 1 Amp continuously.
a) PICKUP VERIFICATION
•
Connect the relay as indicated in Figure 6–1: TOC ALARM UNIT TEST SETUP. In order to apply current to
the relay, use a 50/60 Hz voltage source, with a variable resistor in series, or an electronic current source.
•
Set the relay at the desired pickup TOC and the Instantaneous HDO unit by setting the instantaneous cur-
rent setting to zero.
Apply current to the relay and verify that the Pickup LED on the front of the relay lights between 98% and 102%
of the pickup TOC setting. If the relay is set to blink between power up and pickup, please set it not to blink.
Reduce the current applied, verifying that at a value between 95% and 100% of the pickup TOC, the relay
Pickup LED turns off or blinks if set to blink.
SINGLE
PHASE
CURRENT
SOURCE
6
I
b) VERIFICATION OF OPERATING TIME
Because the Digital self powered series of relays has many different curve characteristics, the basic test
instruction will be given and the data for each of the curves can be found in Table 6–1: PICKUP TIMES FOR
VARYING MULTIPLES OF PICKUP (MPU) on page 6–3. With the relay still connected as indicated in Figure
6–1: TOC ALARM UNIT TEST SETUP, set the time overcurrent unit to minimum pickup and set the corre-
sponding time dial to 5.
Successively apply currents of 2, 5, and 10 times pickup TOC, verifying that the operating times are within the
margins indicated in Table 6–1: PICKUP TIMES FOR VARYING MULTIPLES OF PICKUP (MPU)
6-
2
START
TIMER
DIAC TYPE
66K
T5
in
T6
Figure 6–1: TOC ALARM UNIT TEST SETUP
DIAC Type 66K Digital Overcurrent Relay
STOP
T2
TOC
Alarm
T1
200 mA
GEK-106261
6.5 TOC ALARM UNIT
1 KΩ
–
36/300 V DC
POWER
SUPPLY
CURRENT
LIMITED TO
200 mA
+
GE Power Management
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