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Megger / Multi-Amp MS-1A Overload Relay and Circuit Breaker Test
Set
Common Test Applications
- 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 ratioing current transformers
Specifications
- 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:
0 - 140 volts at 4.5 amperes
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
Insulation Resistance Test Accessory - Model ITA-1
Specifications
- Input: Supplied from Model MS-1A
- Output: 500 volts DC or 250 volts DC
- Instrumentation: An edgewise meter which indicates test voltage and insulation
resistance
- Ranges:
At 500 volts DC:
1. 2-100 megohms with LO-HI switch in LO position
2. 20-1000 megohms with LO-HI switch in HI position
At 250 volts DC:
1. 1-50 megohms with LO-HI switch in LO position
2. 10-500 megohms with LO-HI switch in HI position
- Test Leads: Three 10 ft. leads with appropriate terminals are supplied - one
black, one red and one green
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