Beckwith Electric M-0404 Voltage Isolation Transformer

• Terminals are brass studs No. 10-32 with one lock washer, flat washer,

and regular nut

• The core and coil assembly is encased in a thermoplastic shell and filled

with resin

• It is desirable to use a 1.6 amp fuse in the secondary to protect the

transformer

• The M-0404 is primarily intended to transform 69 Vac control voltages

to 120 Vac for operation with most Load Tapchanger controls

• Alternately, it may be useful (at reduced VA capabilities) of

transforming 208 Vac nominal control voltage to 120 Vac by

reversing the primary and secondary connections

• Each transformer includes two plastic terminal covers

• Approximate weight: 7.75 lbs

Specifications

Frequency: 60 Hz

Nominal Input Voltage: 69.0 Vac

Secondary Voltage: 120 Vac

Insulation Level: 0.6 kV, BIL 10 kV full wave

Ratio Accuracy: Better than ± 1% up to 20 VA over operational temperature range of -40° C

(-40° F) to +85° C (+185° F)

Compliance

IEEE C57.13

IEC

60044-2

UL

E93779

CSA LR89403

Patent and Warranty

M‑0404 is covered by U.S. Patents, and carries a five year warranty from date of purchase.