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Megger MPU690 Proving Unit (Part No. 1001‑561)
The Megger MPU690 is a portable, battery-powered proving unit that simulates AC mains voltage to verify the correct operation of 2‑pole voltage testers. It outputs five stepped voltage levels (690 → 400 → 230 → 100 → 50 V AC) automatically when test probes are inserted. LEDs indicate output level and battery status. It features a rugged case with a magnetic base and high output power for modern voltage testers including indicator lamps
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Product Features
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Five-step output voltage
50, 100, 230, 400, 690 V AC
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Automatic operation
upon probe insertion
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High output power (≈10 W)
suitable for test lamps
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Rugged IP‑rated housing
travel-friendly
Box Content
- 1 x Megger MPU690 proving unit
- 1 x Magnetic base integrated
- 1 x (Optionally) protective pouch or case may be included
- 1 x 6 × AA batteries installed or provided
Frequently Asked Questions
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Q: What voltage levels does it generate?
A: It outputs five stepped nominal voltages: 690, 400, 230, 100, and 50 V AC
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Q: Does it have an on/off switch?
A: No—it's totally automatic: it powers on when probes are inserted and switches off when removed
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Q: What kind of batteries does it use?
A: Six AA (LR06) alkaline batteries—designed for long life
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Q: Is it safe to use around test lamps?
A: Yes—the 10 W output and terminal spacing accommodate tester lamps
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Q: Can it be used outdoors?
A: It's rugged with magnetic base, suitable for harsh environments; recommended for indoor use within spec range .
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