Atec Megger-MTO3XX Series - Manual

DESCRIPTION
The MTO3XX series delivers full eight-terminal/six-
winding resistance measurement capability. It is designed
to save time by testing all six windings without having to
disconnect and reconnect leads. Also, the simultaneous
winding magnetization (SWM) method gives fast and
reliable measurements even on large transformers with
delta configuration on the low voltage side. Additionally,
the MTO3XX series leads are interchangeable with
the Megger TTR300 series of three-phase turns ratio
instruments which eliminates additional connecting time for
turns ratio measurements.
The MTO3XX series consists of two models:
n
The base model, MTO300, is designed to be remote
controlled via PowerDB software on an external PC
or a Megger transformer test product with on-board
computer.
n
The MTO330 offers the same functionality as the
MTO300. However, it is equipped with an onboard
computer featuring full QWERTY keyboard and
navigational pushbuttons as displayed on an 8.4 inch
full-color VGA transflective screen viewable in bright
sunlight.
Modular Testing
The MTO3XX series is the latest addition to Megger’s
extensive line of products with a common digital platform,
allowing users the ability to link with other compatible
Megger transformer test instruments.
n
The MTO300 can be controlled by an external PC or
other Megger products with on-board computer such as
the DELTA3000, DELTA4310, TTR330, and FRAX150.
n
MTO330 has an internal computer and can be used
to control other Megger products such as the TTR300,
TTR310, FRAX99, FRAX101, DELTA2000, DELTA4110,
and MLR10.
APPLICATIONS
MTO3XX Transformer Ohmmeters are used to:
n
Verify factory test readings.
n
Help locate the presence of defects in transformers such
as increased contact resistance in terminal connections
and tap-changers.
n
Check the operation of on-load tap changers.
MTO3XX Series
Automated Six-Winding
Transformer Ohmmeter
n One-time connection principle results in a 4x
faster setup time eliminating over 70% of safety
risk*
n Automated eight-terminal/six-winding
measurement capability
n Interchangeable lead set with the Megger
3-phase series of TTRs
n Simultaneous winding magnetization for
fast and accurate dc winding resistance
measurements of high inductive loads
n Built-in auto-demagnetization
n On-load tap changer operation testing
MTO3XX Series
Six-Winding Transformer Ohmmeter
MTO300 (use with
external PC with
PowerDB)
MT0330 (PowerDB Onboard)
* Historically, a common accident when working in a substation happens while the technician is going up and down a ladder.
The design of the MTO3xx series of products allows testing of all six windings, on a 3-phase transformer, with one lead set connection.
Traditional “one-at-a-time” six-winding testing required 7 to 8 separate trips up/down the ladder as compared to only one trip to connect
and one trip to disconnect with the MTO3xx series.