Testboy TV 455VDE-tester Testboy TV 455 用户手册

ΔN

AC G 

1.05

×I

ΔN

 

AC 

S

 

2

×1.05×I

ΔN

 

any 

A G 

1.4

×1.05×I

ΔN

 

A 

S

 

2

×1.4×1.05×I

ΔN

 

≥ 30 mA 

A G 

2

×1.05×I

ΔN

 

A 

S

 

2

×2×1.05×I

ΔN

 

< 30 mA 

Both models 

B G 

2

×1.05×I

ΔN

 

B 

S

 

2

×2×1.05×I

ΔN

 

any Model 

TESTBOY 

TV 450 (Type B) 

only 

ΔN 

Loop resistance is indicative and calculated from Uc result (without additional 

proportional factors) according to:

Δ

=

. 

 

 

 

 

Displayed results: 
Uc........Contact voltage. 
Rl.........Fault loop resistance. 

 

 
Trip-out time measurement verifies the sensitivity of the RCD at different residual 
currents.  
 
Trip-out time measurement procedure 

* model TESTBOY TV 450 (TYPE B) 

‰

 

Select the 

 function using the function selector switch. 

‰

 

Set sub-function RCDt. 

‰

 

Set test parameters (if necessary). 

‰

 

Connect test cable to the instrument. 

‰

 

Connect test leads to the item to be tested (see 

figure 5.17). 

‰

 

Press the TEST key to perform the measurement. 

‰

 

Store the result by pressing the MEM key (optional)*.