• 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.

Standard accessories

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

Recommended options

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

More products MEGGER

MEGGER TTR300 TTR310 TTR330 THREE-PHASE TRANSFORMER TURNS RATIO METER

• Stand-alone or remote-control operation
• Accurately measures ratio, phase deviation and excitation current
• Field upgradeable without compromise to calibration
• Built-in capability for storing and downloading test results in an XML format, via RS-232, Ethernet or USB ports (depending on model)
• Works in the presence of high interference/high voltage
• Highest ratio measurement (45,000:1); highest accuracy (0.1%)
• Displays % error vs. name plate with pass/fail limits

MEGGER MIT525/2 5KV INSULATING RESISTANCE METER

• Diagnostic testing with full test suite
• PI Predictor™ cuts test time in half
• Accurate testing with RE>Act™
• Built-in storage and easy data export
• Designed for safe testing in the field

MEGGER DET2/3 HIGH RESOLUTION ACCURACY EARTH TEST SET

• High resolution of 1 mΩ, ideal for large earth systems
• Versatile tests modes
• High accuracy for earth/ground electrode grid and soil resistivity tests
• Rechargeable battery power that can last all day with a fast re-charge (up to 10 hours)
• Robust instrument with IP65 protection
• Automatic test frequency selection, with filters and high current features
• Diagnostic trace display
• Data storage
• Large colour display that shows numeric and graphical results

MEGGER S1-1068/2 EXPERT 10KV INSULATION RESISTANCE MEGOHMMETER

• Reliable results in noisy substations
• Accurate testing with RE>Act™
• Remote control for safer, easier testing
• PI Predictor™ cuts test time in half
• Full diagnostic suite with PDC capability

ELECTRICIAN'S MULTIMETER MEGGER - AVO410

• 6000 count backlit digital display
• True RMS reading on a.c. mode
• 1000 V d.c. / 750 V a.c. ranges
• 10 A a.c. / d.c. ranges

CIRCUIT BREAKER TEST SET MEGGER ½ CB-845

• Digital memory ammeter
• Digital, multirange timer
• Lightweight and portable
• High-current output
• Solid-state output initiate circuitry

KARL FISCHER MOISTURE IN OIL TEST SETS MEGGER ½ KF875 AND KF-LAB MKII

• Coulometric Karl Fischer titrimetry
• KF875 optimized for insulating oil with an SG of 0.875, completely portable
• KF-LAB MkII offers greater flexibility, versatility and sample data input than the KF875; also completely portable
• KF-LAB MkII analyzes materials with an SG between 0.6 & 1.4, plus insulating oils with an SG of 0.875

MEGGER S1-1568/2 EXPERT 15KV INSULATION RESISTANCE MEGOHMMETER

TRMS CLAMP METER MEGGER - DCM1500

• DC and AC current up to 1500 A
• True RMS measurement for greater accuracy
• Large jaw size safely assists with uninsulated conductor measurements
• 750 Vac and 1000 Vdc

MEGGER BITE3 BATTERY IMPEDANCE TESTER

• Determines health of lead-acid cells up to 2000 Ah
• On-line testing with Pass/Warning/Fail calculations
• Measures impedance, interconnection resistance and cell voltage
• Windows CE operating system with 32 MB of memory
• Measures float and ripple currents
• Includes PowerDB LITE Management Software