2 wire [HI] loop test
Line/Line(Three phase) (LT320 and LT330)
Supply:
50 V - 480 V 45Hz to 65Hz
Nominal test current 0.25 to 2.4 A
Loop accuracy:
0.01
Ω
-99.99
Ω
(±5% ±0.03
Ω
)
Line/Earth (Single phase)
Supply:
LT310
100 V - 280 V
LT320/LT330
50 V - 280 V
Frequency:
45Hz to 65Hz
Nominal test current:
15 mA to 1.4 A
Loop accuracy:
0.01
Ω
- 9.99
Ω
(±5% ±0.03
Ω
)
10.0
Ω
- 99.9
Ω
(±5% ±0.5
Ω
)
100
Ω
- 999
Ω
(±5% ±5
Ω
)
1.00 k
Ω
- 2.00 k
Ω
(±5% ±30
Ω
)
Prospective fault current (PFC)
Prospective fault current = Nominal Voltage / Loop resistance
Accuracy is derived from loop test
1 A - 199 A
1 A resolution
0.20 kA - 19.9 kA
10 A resolution
2.0 kA - 19.9 kA
100 A resolution
Temperature and humidity
Operating range:
-5°C to +40°C
Operating humidity:
93% R.H. at +40°C max.
Storage range:
-25°C to +70°C
Maximum altitude:
2000 m
Environmental protection:
Weather proof to IP54
Safety
Meets the requirements of EN61010-1 Cat III 300 V phase to earth.
IEC61557
Complies with the following parts of EN61557, Electrical safety in low
voltage systems up to 1000 V ac and 1500 V d.c.- Equipment for testing,
measuring or monitoring of protective measures:
Part1 - General Requirements
Part3 - Loop resistance
Power supply
Battery:
8 x 1.5 V cells IEC LR6 type(AA alkaline).
Rechargeable:
NiCAD or NiMH cells may be used.
Battery condition is constantly shown on the display as a four-section bar
graph. (with 2 bars per section)
Battery life:
2000 consecutive tests on any test using quality
batteries.
Weight
All units:
980gms
21
