Testboy TV 455 - Fault Loop Impedance and Prospective Fault Current; No Disconnecting Device or FUSE Selected

®
TV 450/455 Technical specification
67
0.2×I
ΔN
÷ 2.2×I
ΔN
(A type, I
ΔN
<30 mA) 0.05×I
ΔN
±0.1×I
ΔN
0.2×I
ΔN
÷ 2.2×I
ΔN
(B type)* 0.05×I
ΔN
±0.1×I
ΔN
Trip-out time
Measuring range (ms) Resolution (ms) Accuracy
0 ÷ 300
1
±3 ms
Contact voltage
Measuring range (V) Resolution (V) Accuracy
0.0 ÷ 19.9
0.1
(-0 % / +15 %) of reading ± 10 digits
20.0 ÷ 99.9
0.1 (-0 % / +15 %) of reading
The accuracy is valid if mains voltage is stabile during the measurement and PE
terminal is free of interfering voltages.
Trip-out measurement is not available for I
ΔN
=1000 mA.
Specified accuracy is valid for complete operating range.
9.4 Fault loop impedance and prospective fault current
9.4.1 No disconnecting device or FUSE selected
Fault loop impedance
Measuring range according to EN61557 is 0.25 Ω ÷ 9.99kΩ.
Measuring range (
Ω) Resolution (Ω)
Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
±(5 % of reading + 5 digits)
100 ÷ 999
1
1.00k ÷ 9.99k
10
± 10 % of reading
Prospective fault current (calculated value)
Measuring range (A) Resolution (A) Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
100 ÷ 999
1
1.00k ÷ 9.99k
10
10.0k ÷ 23.0k
100
Consider accuracy of fault
loop resistance
measurement
The accuracy is valid if mains voltage is stabile during the measurement.
Test current (at 230 V)...................... 6.5 A (10 ms)
Nominal voltage range...................... 93 V ÷ 266 V (45 Hz ÷ 65 Hz)