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GEK-100636
T2
-
IT TEST
1. Connect the relay as shown in Figure 21. Set the IT logic switch to the LD
position.
2. Set the phase pickup to 1 amp for Gi and G3 relays and .2 amp for G2 relays. Set
GND current pickup to .5 amp for Gi and G3 relays and .1 amp for G2 relays.
3. Conduct the test according to the steps in Table II. Groups 1 and 3 are 5 amp units
and group 2 is a I amp unit.
TABLE II
Current
Gi
G2
G3
Current Studs
IT Contact
Phase/IT Light
.5A
.08A
.43A
1,2
open
off
.5A
.08A
.43A
3,4
open
off
.5A
.08A
.43A
5,6
open
off
.57A
.IA
.48A
1,2
closed
on
.57A
.1A
.48A
3,4
closed
on
.57A
.1A
.48A
5,6
closed
on
.25A
.04A
.21A
7,8
open
off
.30A
.05A
.24A
7,8
closed
on
T3
-
SHUTDOWN TEST
1. Connect the relay as shown in Figure 21. Set the IT logic switch to the LD position.
2. Conduct the test according to the last line of Table II.
3. While the input current is still being applied, decrease the input DC to 60% of the
rated DC vohage.
4. The only relay lights that should remain on are the DC Voltage Low light and the
Energized light. All contacts should go to their un-energized state.
T4
-
IT,BF]i, and BFT2 TEST
Pickup Delay:
1. Connect the relay as shown in Figure 22. Set the A/0 timer to 0 time delay. Set
each relay according to TABLE III.
TABLE III
Relay
IT Logic
BFT Logic
SBC223A
A/0
SBC223B
B1T Logic
OR
SBC223C
LD
2. Set phase pickup to I A.
3. Input 5 A to studs 1,2 and record the time to close contacts 11,12 13,14 15,16 or
19,20. When the contacts are closed, notice that lights IT,BFT1, and BFT2 are on.
4. Remove 5 A source from studs 1,2.
5. Set A/0 timer to 20 ms.
-12-
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