Alstom SHPM 101 - Section 5 FURTHER TESTING; 5.7 Check on clock frequency; 5.8 Check on Z1 extension

SERVICE MANUAL R5888C
QUADRAMHO Chapter 6
Page 11 of 12
i) Transphasor main winding
V (
I
Y1
– I
Y2
) =
0.34
I
Y
±1%
I
n
where Y is either A, B, C or N and IY is the primary current.
ii) Transphasor additional winding
V (
I
N3
– In
common
) =
0.068
I
N
±1%
I
n
iii) Current transformer (Quadrilateral version only)
V (
IR
Y
– IR
common
) =
0.544
±10%
I
n
Phase Signal Test point Formula
A I
A
1 AA5 (I)
I
A
2 AB5
B
I
B
1 AA19 (I)
I
B
2 AA1
C
I
C
1 AB15 (I)
I
C
1 AA3
N
I
N
1 BB31 (I)
I
N
3 BB19
N
I
N
3 AB19 (ii)
I
Ncommon
AB35
A
I
A
R BB21 (iii)
I
A
R
common
AB17
B
I
B
R AA21 (iii)
I
B
R
common
AA29
C
I
C
R AA25 (iii)
I
C
R
common
AB25
5.7 Check on clock frequency
Using the oscilloscope or frequency meter, check the clock frequency which is
available at the 25 way monitor point box pin 4 (pin 2 0V). The frequency should
be 3.6kHz ±1% for 50Hz relays or 4.32kHz ±1% for 60Hz relays.
5.8 Check on Z1 extension
Remove module 2 and insert the double extender card into the right hand position.
Connect the positive terminal of the multimeter to edge connector BB27 and the
negative terminal to pin 2 (0V) of the 25 way monitor point box. Select option 63
and SW3 to the right. Check the multimeter reads 0V dc. Press and hold the
pushbutton and check the multimeter reads 12V dc. If this test fails replace (RCL
10).