On Tue, 30 Aug 2011 02:58:19 +0000 (UTC), David Lesher
wrote:

John Fields writes:


I have an old P&B MR5A here with a 240V 50/60Hz coil.

The coil has a resistance of 4800 ohms, and an open inductance of 14.5
henrys, so it has an impedance of 6616 ohms at 50 Hz, and 7270 ohms at
60 Hz.

What's the inductance while closed?

---
16 henries, but that measurement was made by closing the armature
manually.

If there's any real interest I can measure it energized.

--
JF