Areva MCAG 19, Руководство по обслуживанию

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Page 7
4.2 Contact setting
Normal duty make and break contacts.
With the armature closed onto a 0.012" feeler gauge the make contact should be
closed, but should be open using a 0.015" feeler gauge.
Force to just close the make contacts 18/23 grams.
Make contact gap 0.070"/0.080".
Force to just open the break contacts 15/20 grams.
Break contact gap 0.060"/0.070".
The gap between the top of the armature and the make moving contact should be
0.130 minimum when the flag is down.
Relays with four pairs of hands reset contact.
It will be necessary to remove the force of the upper contacts from the measuring the
appropriate contact force.
Also with the flag down the force to just move the armature off the backstop should
be 60/80 grams. This force is measured at the end of the armature and is adjusted by
the screw which is located between the contact blades near to the contact blocks.
Contact settings for:
Normal duty make and break short hand reset contacts.
4.3 Mechanical flag setting
With the armature closed onto a 0.015" feeler gauge the flag should be free to fall,
but should not fall using a 0.020" feeler gauge.
Adjustment is made to the catch spring on the flag.
Section 5. PROBLEM ANALYSIS
5.1 Failure to operate
Check diagram for correct input connections. Check value of I
s
, the value is marked
on the module front plate over the plug bridge. The potentiometer (xI
s
) is a
multiplier for the plug setting.
Check internal wiring for loose or damaged joints.
Flag spring may be distorted holding the armature open.
Push rods not correctly located.
Check value of potentiometer RV1 (4.7K ohms +10%) and that its value can be
adjusted.
Check value of R1 (1K ohms +5%).
Check continuity of T1 secondary/primary (check both plug taps).
Check continuity of relay coil (2640 ohms
±
10%).
Check diodes D1 and D4 on the pcb Zg 0891 for open or short circuit.