Atec Megger-MFT1500 Series - Manual (Page 3)

MFT1500 Series
Combined Insulation, Loop & RCD Tester
button in all test modes.
■ LED torch using a built-in WHITE LED light provides illu-
mination to the probe tip, providing essential lighting in
low light conditions.
■ Red/green status LED duplicates the warning display on
the main instrument display. A RED LED indicates a
voltage present on an insulation range. A GREEN LED
indicates the instrument is displaying a valid test result.
■ Three interchangeable probe tips are supplied in
standard shrouded, removable shrouded and an extended
probe tip to provides the ideal probe tip option.
■ Illuminated display and selector ranges. Not only the
backlight, but also the selector dials are illuminated to
allow for use in difficult low-light conditions. Range or
function change automatically operates the backlight, or
by manual selection.
■ Instrument and document carry case is supplied to
transport the instrument as well as any necessary test
leads, documents, drawings etc.
MFT1552 & MFT1553 Additional features
Selecting the auto (RCD) feature, starts the RCD test current
cycle of
1/2 I, I and 5I.
Each time the RCD is tripped, resetting it, automatically
continues the test sequence.
Once completed, test results can be recalled on the
MFT1552.
MFT1553 Additional features
Using the Bluetooth function, download test results directly
into inspection certificates, within PowerSuite
® running on
laptops and mobile devices for on-site certification.
Alternatively the data can be downloaded into Mobile
Download Manager for storage and later processing.
SPECIFICATION
Supply Voltage range
Voltage a.c.:
0 V - 500 V 50/60Hz ±2% ±2 digits
Voltage d.c.:
0 V - 500 V ±2% ±2 digits
Polarity indicated above 10 V
Insulation test ranges (to EN 61557-2)
Short circuit current: <2 mA
250 V 0.01 MΩ - 99.9 MΩ
500 V 0.01 MΩ - 299 MΩ
1000 V 0.01 MΩ - 499 MΩ
±2% ±2 digits up to 99 MΩ
250, 500 and 1 kV into 1 mA (BS7671, HD384 and IEC364)
Output voltage: +20% - 0% at rated load or less
Live circuit warnings
Insulation:
25 V threshold
Continuity:
>15 V threshold
Insulation
25 V visual warning
55 V visual, audible and test inhibit
Phase to earth:
>280 V visual, audible and test inhibit
Continuity (to EN 61557-4)
Ohms:
0.01 Ω - 99.9 Ω (±2% ±2 digits)
100 Ω - 99.9 kΩ (±5% ±2 digits)
Buzzer
Selectable limits of 2 Ω, 5 Ω, 10 Ω, 20 Ω, 50 Ω, 100 Ω
Open circuit voltage 4-5 V d.c.
Test current:
>200 mA @ 2 Ω
Test Lead null:
Up to 9.99 Ω (zero uses Test Button)
Loop test ranges (to EN 61557-3)
Line/Earth(Single phase)
25 A
0.01 Ω - 9.99 Ω (±5% ±0.03 Ω)
10.0 Ω -89.9 Ω (±5% ±0.5 Ω)
90 Ω - 899 Ω (±5% ±5 Ω )
900 Ω - 3.00 kΩ (±5% ±20 Ω)
Supply:
55 V - 280 V 45 Hz to 65 Hz
Phase to phase
25 A
0.01 Ω -1 9.99 Ω
(±5% ±0.03 Ω)
Supply:
55 V - 480 V 45Hz to 65Hz
Low current Loop (NO TRIP)
15 mA
0.01 Ω - 2.00 kΩ (±5% ±0.03 ohms ± Noise Margin).
Supply:
55 V - 270 V 45Hz to 65Hz
Prospective Shortcircuit Current PSC
Prospective fault current = Nominal Voltage/Loop Resistance
Accuracy is therefore derived from the loop test.
1 A - 199 A 1 A resolution
0.02 kA - 1.99 kA 10 A resolution
2.0 kA - 19.9 kA 100 A resolution