Description
Features:
■■ Measures up to 30 TΩ
■■ Safety rated up to CAT IV 1000 V to 3000 m
■■ Unique dual-case design – additional user protection
■■ Operates from battery or AC mains supply
■■ Rapid charge Li-ion battery
■■ Advanced memory with time/date stamp
Megger’s new range of DC insulation testers MIT515, MIT525, MIT1025 and MIT1525 are targeted at original equipment manufacturers and industrial companies. The top of the range MIT1525 performs insulation resistance tests up to 15 kV with a 30 TΩ maximum resistance and an accuracy of ±5 % from 1 MΩ up to 3 TΩ. The MIT515 offers IR, DAR and PI functions but has no memory functionality. MIT525, MIT1025 and MIT1525 have a full
suite of test modes as well as on-board memory and the ability to stream data/download data to a PC/laptop. Instrument productivity is a focus of the new MIT range which offers rapid charge batteries and operation from an AC source if the batteries are flat. Rapid charge batteries enable > 60 minutes testing after a 30 minute charge.
MIT515: 5 kV IRT with PI and DAR but no memory
MIT525: 5 kV IRT with all test modes including a ramp test plus advanced memory functions with recall to screen, RTC for time/dat stamp of results and USB cable interface to PC/PowerDB
MIT1025: 10 kV IRT with all test modes including a ramp test plus advanced memory functions with recall to screen, RTC for time/dat stamp of results and USB cable interface to PC/PowerDB
MIT1525: 15 kV IRT with all test modes including a ramp test plus advanced memory functions with recall to screen, RTC for time/dat stamp of results and USB cable interface to PC/PowerDB
Safety rating is not compromised on the MIT range with all terminals safety rated to CAT IV 600 V to 3000 m (5 kV, 10 kV) or CAT IV 1000 V to 3000 m (15 kV). A range of 5 kV and 10 kV test leads are available plus dedicated 15 kV test leads which are double insulated with clips designed for 15 kV creepage paths. The 15 kV leads are supplied in a holdall. Suitably rated HV gloves and other personal protection equipment are required to be worn when testing.
The MIT range share dual case design which includes a tough outer case to protect the tester from knocks/drops and an inner fire retardant case. The IP rating is IP 65 case closed eliminating
moisture and dust ingress.
An intuitive user interface ensures no lost time remembering how to use the tester. Simplicity of operation is achieved with two rotary switches and the large backlight display which enables multiple results to be displayed simultaneously. A graphical quick start guide is provided inside the lid to assist first time users.
Five preset voltage ranges are provided in insulation test mode, plus a user settable lock voltage range. Preconfigured diagnostic tests include Polarisation Index (PI), Dielectric Absorption Ratio (DAR), dielectric discharge (DD), Stepped Voltage (SV) and ramp test.
Advanced memory storage includes time/date stamping of results, logging of data and recall of results to screen. A fully isolated USB interface is used for safe transfer of data to Megger’s asset management software; PowerDB Pro, Advanced and Lite packages.
Test leads are double insulated t with clamps rated at 3 kV t equivalent to 6 kV single insulation for the medium clip leadset and 5 kV t equivalent to 10 kV single insulation for the large clip. The 15k V leadset is insulated to 15 kV.
Advanced memory storage includes time/date stamping of results, logging of data and recall of results to screen. A fully isolated USB device interface (type B) is used for safe transfer of data to Megger’s PowerDB / Pro, Advanced and Lite asset management software. (MIT525, MIT1025 nd MIT1525 only).
APPLICATION:
The Insulation Resistance (IR) test is a quantitative test which indicates the effectiveness of a product’s electrical insulation. Applications include cables, transformers, motors/generators, circuit breakers and bushings. Common insulation tests are the “spot test”, a 1 minute IR test and a 10 minute Polarisation Index (PI) test, where PI is the ratio R10min / R1min and is temperature independent.
FEATURES AND BENEFITS:
■■ Insulation resistance up to 30 TΩ @ 15 kV, 20 TΩ @ 10kV, 10 TΩ @ 5 kV
■■ IR, Timed IR, DAR, PI, DD, SV and ramp diagnostic tests
■■ High current – 3 mA short circuit current
■■ High noise immunity – 3 mA (5 kV and 10 kV) 6 mA (15 kV) of noise rejection
■■ Li-ion battery – up to 6 hrs continuous testing @ 5 kV with a 100M load, battery meets IEC 2133
■■ Safety rating: CAT IV 600 V to 3000 m (5 kV, 10 kV) CAT IV 1000 V to 3000 m (15 kV)
■■ Large LCD display with backlight
■■ Dedicated voltmeter function (30 V to 660 V)
■■ Advanced memory, on screen recall and real time clock for date/ time stamped results (MIT525, MIT1025 and MIT1525 only)
■■ Download of on-board results via USB interface (MIT525, MIT1025 and MIT1525 only)
■■ Recorded temperature (measured by independent instruments) can be saved with test result (MIT525, MIT1025 and MIT1525 only)
■■ PowerDB Lite asset management software supplied (MIT525, MIT1025 and MIT1525 only)
■■MIT515, MIT525 and MIT1025 safety rated at CAT IV 600 V (maintained to 3000 m altitude)
■■MIT1525 safety rated at CAT IV 1000 V (maintained to 3000 m altitude)
