Multi-Amp/Megger MS-1A Overload Relay/Circuit Breaker Test Set

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Multi-Amp/Megger MS-1A Overload Relay/Circuit Breaker Test Set
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Megger MS-1A
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The MS-1A test unit has a patented circuit consisting of a continuously variable autotransformer which supplies a Multi-Amp output transformer, thus providing stepless control of the output current. Integral metering, timing and control circuitry are included. The unit is housed in a convenient suitcase-type enclosure for easy portability.

The MS-1A will test time-current characteristics of motor overload relays and molded case circuit breakers rated up to 100 amperes by simulating overloads up to 300% of their rating. Auxiliary applications include testing of in-line motor cut-outs, fuse links, meters and rationing current transformer.
Megger MS-1A Specs
Rating 0.6 kVA
Input 120 volts, 60 hertz, single phase
Output (Continuously adjustable in four ranges to meet a variety of test circuit impedances) row 3 column 2
0 - 24 volts at 25 amperes
0 - 6 volts at 100 amperes
0 - 3 volts at 200 amperes
Ammeter (A large, easily read instrument with 3½" scale) Scales: 5 / 10 / 25
Ranges (switch selected): 0-2.5 / 5 / 10 / 25 / 50 / 100 / 250 / 500 amperes
Timer Measures elapsed time of the test from 0.1 second to 9999.9 seconds
Housing Molded plastic, high strength suitcase type enclosure with easy-to-carry handle. Storage space is provided for test leads
Dimensions 9" H x 14½" W x 9" D
Weight Net 35 lbs
Test Leads Two No. 22 timer leads each 5 feet long. Two No. 4 high current leads, each 5 feet long