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 kΩ (±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
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