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7. ACCEPTANCE TESTS
7.5.
PREVIOUS CHECK
According to drawing 226B6429H44 check out the following connections between cabinets:
1. Connect A and B and N terminal of each cabinet to their corresponding A and B and N terminal of the
rest of the cabinet. (A1 to A1, B1 to B1, N1 to N1, A2 to A2...).
2. Connect X1 terminal of cabinet 1 to Y1 terminal of cabinet 2,
3. Connect X2 terminal of cabinet 1 to Y2 terminal of cabinet 2.
4. Connect X3 terminal of cabinet 1 to Y3 terminal of cabinet 2.
5. Connect X4 terminal of cabinet 1 to Y4 terminal of cabinet 2.
6. Connect X5 terminal of cabinet 1 to Y7 terminal of cabinet 2.
7. Connect X6 terminal of cabinet 1 to Y8 terminal of cabinet 2.
8. Connect X7 terminal of cabinet 1 to Y11 terminal of cabinet 2.
9. Connect X8 terminal of cabinet 1 to Y12 terminal of cabinet 2.
10. Connect X9 terminal of cabinet 1 to Y15 terminal of cabinet 2.
11. Connect X10 terminal of cabinet 1 to Y16 terminal of cabinet 2.
12. Connect X34 terminal of cabinet 1 to Y19 terminal of cabinet 2.
13. Connect X161 terminal of cabinet 1 to Y20 terminal of cabinet 2.
14. Connect X162 terminal of cabinet 1 to Y21 terminal of cabinet 2.
15. Connect X163 terminal of cabinet 1 to Y22 terminal of cabinet 2.
16. Connect X164 terminal of cabinet 1 to Y23 terminal of cabinet 2
Feed the equipment by connecting the positive of a dc voltage source to X1 borne, and the negative to X2
borne.
Make sure that there is also dc voltage in X7 (+), X8 (-), in Y11 (+), Y12 (-), all the signalling LEDs on the
differential (DDF) and alarm (DAL) boards are lit up after pressing the reset button.
Press also the reset buttons of the breaker failure boards (SFI) making sure that the breaker failure LED
lights up, in all positions.
7.6.
DIFFERENTIAL UNIT CHECK
Set the latching relay corresponding to Bus A, in the line 7 (89AX/P7) to the ON position, that is, applied
positive to P7- 15 and make a jump between P7-11 & P7-12.
Set the block latching relay corresponding to this differential to the ON position (3B/87A), check that X33-
X34 is opened. The green light corresponding to bus A in the test box will be on. If not so, switch it on by
pressing the green button.
Make a jumper between stabilization resistors and shorten U1 with U2.
7-2
BUS1000 Busbar Protection
7.6.1. BUS A
GEK-98514B
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