Toshiba Current Relay RC803A-HP1 - Manual (Page 13)

T O S H I B A
6 .
6.1 Current setting
(1) When detected current is in a range of 0.5
After confirming that the current value under load
condition is in a range of 0.5 set the current
adjusting knob to the desired detecting value.
When detected current is above
Using an external CT (current transformer), suited
for the detected Current value, connect the secondary side of
the CT to the o f t h e r e l a y . C a l c u l a t e t h e
secondary current to the detected current
value, based on the CT ratio. Then set the current adjusting
Knob to this calculated value.
6.2 Setting the detection delay
Setting time varies depending each individual
Adjust the detection delay according to the following:
l o a d
TO avoid detection during start-up, set the delay tire to
120% of starting
(2) load
If the inrush current (inrush time varies
i s l a r g e , s e t t h e d e l a y to
1 2 0 % o f t h i s i n r u s h the i s
inrush is short and therefore, even when the
adjusting knob is set at the position. there should
not be any nuisance tripping.