• Automated 8-terminal/6-winding measurement capability
• Simultaneous winding magnetization
• Tests operation of on-load tap-changers
• Built-in auto-demagnetization feature
• Automatic discharge
• Power DB software (MTO330)

The MTO 3xx series delivers full eight-terminal/six-winding resistance measurement capability. It is designed to save time for the user by testing all normal 6 windings without having to disconnect and reconnect leads during testing. 

The MTO3xx series also shares the Megger TTR3xx series lead set. Users who test both turns ratio and winding resistance can save time and money since only one lead set is needed to connect to the transformer.

Transformer Ohmmeter 120/240 V, 50/60 Hz input MTO300

Transformer Ohmeter, with onboard computer, 120/240 V, 50/60 Hz input MTO330

Included Accessories

Ground lead, 15 ft (4.5 m) 4702-7

Canvas carrying bag 30915-211

AC power cord (IEC60320-C13 to US Standard) 17032

AC power cord (IEC60320-C13 to Schuko CEE 7/7) 17032-13

Quick start guide for MTO300 37178-1

Quick start guide for MTO330 37178-2

CAT5e patch cable 36798

Instruction manual ATVMMT0300

PowerDB Basic

USB to ethernet adapter (to connect PC to MTO300) 90001-541

Optional Accessories

USB portable thermal printer (120 V) 36493-1

USB portable thermal printer (230 V) 36494-1

Foam lined transit case 37009

PowerDB Pro software 1st machine license,

soft key DB1001

PowerDB Pro software 1st machine license,

USB dongle DB1001S

Remote hand switch 30915-220

Universal lead sets, compatible with Megger

TTR300 Series products (up to 10 A DC max)

3-phase shielded test lead set, X and H windings

60 ft (18 m) 36486-5

30 ft (9 m) 36486-6

33 ft (10 m) extension 36486-9