Binary Output Module (Nr4521) - NR Electric PCS-9611 Instruction Manual

I Rated short-time thermal current (amps)
th
I Rated dynamic current (amps)
dyn
I Rated secondary current (amps)
sn
K Accuracy limit factor: K
alf
I Rated accuracy limit primary current (amps)
pal

Performance Verification
'
E > E
sl sl
Rated secondary limiting e.m.f (volts):
E
sl
E
sl
Required secondary limiting e.m.f (volts):
'
E
sl
E
sl
K Accuracy limit factor: K
alf
k Stability factor: k is 1.0 ~ 2.0, the recommended value is 2.0.
I Rated accuracy limit primary current (amps)
pal
Protective checking factor current (amps): same as the maximum
I
pcf
prospective fault current
I Rated primary current (amps)
pn
I Rated secondary current (amps)
sn
R Current transformer secondary winding resistance (ohms)
ct
R Rated resistance burden (ohms): R
bn
S Rated burden (VAs)
bn
Real resistance burden (ohms):
R
b
R
R Contact resistance, 0.05~0.10 (ohms)
c
R Resistance of a single lead from relay to the CT (ohms)
L
R Impedance of relay phase current input (ohms)
r

Example
K = 30.00, I
alf sn
E = k × I × (R
sl alf sn
So, E = 30 × 5 × (1 + 60 / 5
sl
I = 40000A,
pcf
' = k × I
E × I
sl pcf sn
' = 2 × 40000 × 5 × (1 + (0.1 + 2 × 0.5 + 0.1)) / 2000 = 440V
So, E
sl
It can meet the requirement: E

6.7 Binary Output Module (NR4521)

The binary output module consists of some necessary contact outputs, and the binary outputs are
PCS-9611 Feeder Relay
= I
alf
= k × I × (R + R )
alf sn ct bn
' = k × I
× I × (R + R
pcf s n ct
= I
alf
= R + 2R + R
b r L c
= 5A, R = 1.00Ω,
ct
+ R ) = k × I × (R
ct bn alf sn
2
) = 510V
R = 0.50Ω, R = 0.10Ω,
L r
× (R + R ) / I = k × I
ct b pn
'.
> E
sl sl
Date: 2014-04-08
/ I
pal pn
) / I
b pn
/ I
pal pn
2
= S / I
bn bn sn
S = 60VA
bn
2
+ S / I )
ct bn sn
R = 0.10Ω,
c
× I × (R + (R + 2R
pcf sn ct r
6 Hardware
I = 2000A
pn
+ R )) / I
L c pn
6-13