Megger OTS60SX Data sheet

OTS60SX

Semi Automatic Oil Test Set

n Lightweight portable unit for field use

n Simple, semi-automatic operation

n Suitable for all oil breakdown testing to

60 kV

n Automatic 1 minute timer for easy

withstand testing

OTS60SX

Semi Automatic Oil Test Set

DESCRIPTION

The Megger®OTS60SX is a lightweight, semi-automatic,
oil dielectric strength test set. The instrument is suitable
for field use and can be powered from a range of mains
supplies. The maximum 60 kV output allows tests to be
performed on oil from a wide variety of electrical
installations including transformers, circuit breakers and
other equipment. The operation of the test set is
extremely simple and the results are displayed on a bright
LED display. A selection of vessels allows the instrument
to be configured for a variety of test standards.

The microprocessor controlled, semi automatic operation
allows the user to select a choice of voltage rise rates as
specified in many national standards. The start button will
then initiate the test. If oil breakdown occurs the
instrument will remove the test voltage and display the
breakdown value. Alternatively the user can pause the test
voltage at any time to carry out a withstand test. The
voltage will be maintained at this level for one minute or
until breakdown. After one minute the voltage will
automatically continue to rise until breakdown occurs or
to the maximum output of the instrument.

A sheet steel enclosure makes the instrument rugged and
safe. A strong polycarbonate window covers the high
voltage chamber. A mesh screen enables the oil
breakdown to be viewed and reduces electro-magnetic
emissions. Operator safety is ensured by an interlock on
the chamber door. The power cord and other accessories
are stored in a pouch which is fitted to the side of the test

set. An optional carrying bag with shoulder strap is also
available.

The oil vessel is located in the top of the instrument. An
external nut varies the electrode gap. The design of the
vessels and test chamber makes them easy to clean. The
instrument is supplied with a spacing gauge for setting the
electrode gap.

A range of vessels are available suitable for testing to a
wide range of national specifications. Three types of
electrode are available; spherical (IEC type), mushroom
(VDE/ASTM D1816) and cylindrical (ASTM D877). The oil
sample can be stirred by a motor driven propeller
available in some of the vessels. Spare electrodes can also
be supplied suitable for all types of oil testing.

APPLICATIONS

Oil has been used as an insulating medium in
transformers for over one hundred years. From the earliest
days of transformer design, oil has been recognised as
being an efficient coolant with a high flash point and high
electric strength. Oil can be used in electrical equipment
for a long time if adequately maintained.

Many factors can lead to a weakening of the insulation
properties of oil. Oil degradation takes place due to
oxidation, acids, sludge, gas and water absorption. These
processes change the electrical properties of the oil which
can be seen from a dielectric strength test.

OTS60SX

Semi Automatic Oil Test Set

The range of oil test sets available from Megger Limited
offers solutions for all oil testing applications. The popular
OTS60PB is a fully automatic portable unit. The automatic,
laboratory OTSAF/2 series incorporate a built in printer
and enable the user to program custom tests.

FEATURES AND BENEFITS

n Simple to use
n Low cost, low weight (17,5 kg) (38.5 lbs)
n Strong, safe construction
n Suitable for testing to national standards
n Auto 1 minute timer for easy withstand testing
n 0,1 kV measurement resolution
n Large, clear LED display
n Reliable operation controlled by microprocessor
n Powered from a range of mains supplies
n Wide range of optional vessels
n Easy to clean vessel and chamber

SPECIFICATIONS

High Voltage Output

Voltage:

0 - 60 kV

Test Frequency:

61,8 Hz

Transformer rating:

500 VA

Output disconnection

Within 1 ms of detection of
breakdown

Input

Power supply:

115/230 V, switch selectable
(99-132 V, 198-264 V)
50/60 Hz, max 80 VA

Operation

Semi automatic with selectable
500/2000/3000 V/s voltage rise
rate

Pause function with automatic
1 minute timer for withstand
testing

Controls

Start, pause, stop & ramp rate
select

Display

0,0 - 60,0 kV 25 mm LED digital
display ‘HV On’ LED

Measurement Accuracy

2% +/- 3 digits

Safety

The instrument meets the
requirements of IEC61010-1

EMC

In Accordance with IEC61326-1

Fuses

250 mA (T) HRC to IEC127/5
for 220/240 V supply

500 mA (T) HRC to IEC127/5
for 110/120 V supply

Environmental

Temperature Range
Operating:

0 to 40°C (32 to 104°F)

Storage:

-40 to +70°C (-40 to +158°F)

Humidity Range

Operating:

80% RH at 40°C (104°F)

Storage:

93% RH at 40°C (104°F)
95% RH at 25°C (77°F)

Physical Dimensions

336 mm x 400 mm x 235 mm
(13,2 in. x 15,7 in. 9,3 in.)

Weight

17,5 kg (38,5 l

ORDERING INFORMATION

Item Order Code

Semi Automatic 60 kV Oil Test Set OTS60SX

Included Accessories

Spacing Gauge (0,5 mm x 6) 6132-009
Accessory Pouch 6320-232
User Guide 6172-120
Power cord unterminated 25424-860
Power cord US plug 25970-002

Optional Accessories

Padded carrying case 6420-106
0,5 l Vessels with:
Spherical electrodes for IEC156 6320-233
Spherical electrodes for IEC156 with stirrer 6320-236
Mushroom electrodes for VDE0370 6320-234

UK

Archcliffe Road Dover
CT17 9EN England
T [phone]
F [phone]

UNITED STATES

4271 Bronze Way
Dallas TX 75237-1088 USA
T 800 723 2861 (USA only)
T [phone]
F [phone]

Item Order Code

Mushroom electrodes for ASTM D1816
with stirrer 6320-237

0.15 litre vessel with cylindrical electrodes
for ASTMD 877 6111-356

Spare Electrodes for 0.5 L vessels
Spherical (pair) 6220-484
Mushroom (pair) 6220-580
Cylindrical (pair) 6220-483
Cylindrical with 0,5 mm edge radius (pair) 6220-538

OTHER TECHNICAL SALES OFFICES

Norristown USA, Toronto CANADA,
Mumbai INDIA, Trappes FRANCE,
Sydney AUSTRALIA, Madrid SPAIN
and the Kingdom of BAHRAIN.

Registered to ISO 9001:2000 Reg no. Q 09290

Registered to ISO 14001 Reg no. EMS 61597

OTS60SX_DS_en_V11

www.megger.com
Megger is a registered trademark