--- MPC 20 & 50 TESTER - M-981136 (vers. BD) --- Page
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2.- DESCRIPTION OF THE MAIN COMPONENTS
2.1.- VOLTAGE SOURCE
MPC-20: voltage source, with 10 regulating scales using a switch and
fine adjustment using a dial. Supplies a regulable voltage between 0 and 600 V
and is set for a current of 20 A. It can test to 20 A in installations with a 30
Ohms resistance (ground and auxiliary added).
MPC-50: voltage source, with 8 regulating scales using a switch and fine
adjustment using a dial. Supplies a regulable voltage between 0 and 400 V and
is set for a current of 50 A. It can test to 50 A in installations with a 8 Ohms
resistance (ground and auxiliary added).
The remaining components are the same in each:
2.2.- CONTROL AND PROTECTION CIRCUIT
Button for testing erratic currents. Two directional selector key to control the
current injection (0º and 180º): Line voltage indicator. Over heating indicator.
Fuse protection for the operating circuit Protective circuit breakers for all the
equipment and for the output circuit.
2.3.- VOLTAGE AND CURRENT TESTER, controlled by micro-processor. It
test and also calculates Vp, Vc and Rt. The alphanumeric liquid crystal display
shows preset data, measurements and calculations.
2.4.- TOUCH ELECTRODES, that are cylindrical, 200 square cm at the base
and weigh 250 N, with carrying handles and terminals for connecting the testing
cables.
2.5.- ACCESSORIES. 50 metre cables, 10 mm in diameter with terminals for
current injection. 50 metre cables for voltage reading. Bridging cable to join the
two touch electrodes.
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