T.I.S. INSTRUMENTS MFT-PRO - Page 20

MFT-PRO
Quick reference guide
EN – 18
Test on earth leakage relay RCD (with accessory RCDX10)
Residual current protection type (RCD): AC ( ), A ( ), B( ) – General (G), Selective (S) and Delayed ( )
Voltage range Phase-Earth, Phase-Neutral: 100V 265V RCD type AC and A, 190V 265V RCD type B
Rated tripping currents (IN): 0.3A  10A
Frequency: 50/60Hz  5%
Earth leakage relay RCD tripping current ( ) – (for RCD General only)
RCD type
I
N Range I
N
[mA]
Resolution [mA] Accuracy
AC, A, B
300mA IN 10A (0.3  1.1) I
N
 0.1I
N
- 0%, +5%I
N
Duration of earth leakage replay RCD tripping time test – TT/TN systems
x 1/2 x 1 x 2 x 5 AUTO
\ G S
G S G S G S G S G S
0.3A

1.0A
AC 999 999 999 999 999 999 200 250 50 150
 
310
A 999 999 999 999 999 999 200 250 50 150
 
310
B 999 999 999 999 999 999 310
1.1A

3.0A
AC 999 999 999 999 999 999 200 250 50 150   310
A 999 999 999 999 999 999 200 250 50 150   310
B 999 999 999 999 999 999
3.1A

6.5A
AC 999 999 999 999 999 999 200 250 50 150   310
A 999 999 999 999 999 999 200 250 50 150   310
B 999 999 999 999 999 999
6.6A

10.0A
AC 999 999 999 999 999 999 200 250
A 999 999 999 999 999 999
B
Table with duration of tripping time measurement [ms] - Resolution: 1ms, Accuracy:(2.0rdg + 2dgt)
Duration of earth leakage replay RCD tripping time test – IT systems
x 1/2 x 1 x 2 x 5 AUTO
\ G S
G S G S G S G S G S
0.3A

3.0A
AC 999 999 999 999 999 999 200 250 50 150   310
A
B
3.1A

6.5A
AC 999 999 999 999 999 999 200 250 50 150
 
310
A
B
6.6A

10.0A
AC 999 999 999 999 999 999 200 250
A
B
Table with duration of tripping time measurement [ms] - Resolution: 1ms, Accuracy:(2.0rdg + 2dgt)
NoTrip – Global earth resistance with no residual current protection tripping
Voltage range Phase-Earth, Phase-Neutral: 100V  265V
Frequency: 50/60Hz  5%
Global earth resistance in systems with Neutral
Range [] Resolution []
Accuracy
0.01  9.99
0.01
-(5rdg + 0.1)
10.0  199.9
0.1
-(5rdg + 1)
200  1999
1
-(5rdg + 3)
Maximum current: <15mA
Ut LIM (UL): 25V or 50V
Global earth resistance in systems without Neutral
Range [] Resolution []
Accuracy
1  1999
1
-(5rdg + 3)
Maximum current: < ½ I
N
set
Ut LIM (UL): 25V or 50V