Toshiba Current Relay RC803A-HP1 Instruction Manual
TOSHIBA
I
NSTRUCTI
ON MANUAL
CURRENT RELAY
RC803A-HP1
TOSHIEA
CORPORATION
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TOSHIBA
6F9E0090
CONTENTS
1.
General
Descrigtion
__-----_-__----____---------------------
2
2.
Check Before Using
-__-----__-_---_-_______________________-
2
2.1
External
Amearance
-_-_-_---_-__-__-_----------------
2
2.2 Specifications
_--_---_-__-__--_-__-------------------
3
3.
DescriDtion
of
ODeration
__-______-_______-__---------------
5
4.
Applications
__-______-_________----------------------------
6
4.1 Overcurrent Detection on Hotors ----------------------- 6
4.2 Undercurrent Detection on Motors ----------------------
0
b.3
Limiting Starting Current of Rotors -------------------
9
.
4.4
Transformers
-__----__-__-___-___----------------------
10
4.5 Heaters,
Laape
and Other Circuits ---------------------
10
5.
Mounting
---____----___-_-_-_____________________-----------
10
6.
Adjustaents ----------
--__-_----______---___________________
12
6.1
Current
Setting
____-----_-_____-______________________
12
6.2 Setting the Detection Delay
Tiae
---------------------- 12
6.3
Setting the Response Delay
Tiae
----------------------- 13
7.
Ogerat ional
lest
____--_____--___________________________---
13
8.
Cover
Reaoval
_-_-m-mm--- -____-__-__-__--___-_______________
17
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=rosHl=A
6F9E0090
Please thoroughly read this instruction
manual
before using the
RC803A
Current
SensinD
Relay.
1. General
DescriDtion
This current relay is designed to detect current in AC circuits
with a wide range of
aDDiications, e.t.,
detection of abnoraai
current of
VariOUS
electrical
eauiment
due to overloads or broken
circuits
(e.g.,
heater circuits), detection of starting current to
autoaaticaiiy advance the secondary resistance on induction wound
rotor motor controllers.
During starting, excessive current such as inrush current,
lay
exceed rated current flow in motor or transforaer circuits. this
current relay has an adjustable delay circuit to prevent it
fro&
operating during start-up.
Further, this current
relay
is fail safe. The relay
ooerates
at the
saae tile
control Dower is applied. and the relay is
de-
energized when the
inout signal
exceeds the
Dreset
level or control
Dower is removed.
2. Check Before Using
Before
using
this relay. check the following Doints. If any
defects are found, contact the dealer
free
which you purchased this
relay.
2.1 External
Aopearance
Check the relay for any missing Darts and for damage, dirt,
rust, and loosened
screi6
caused during transportation.
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TOSHIBA
6F9EO090
2.2 Specifications
_____________-_-________________________------------------------------
ITEH
Rated Current
Range of current
sensing
Inout
circuit
voltage
Type
of Current
ReSDOnSe
delay
time-adjustable
range
Detection delay
tile-adjustable
range
Operating volt.
SPECIFICATIDHS
5A
(continuous)
0.5 - 5A (For current above this range, use a
CT (current transforrer) and connect the
relay to its secondary side).
>
low voltage circuit (below AC
6OOV)
3
To detect current in high voltage circuits,
use a CT, and connect the relay to its
secondary side.
Overcurrent,
Undercurrent
0.1
-
3s
0.1 - 30s
a5
-
132VAC.
170 -
250VAC,
50/6Diiz
i
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TOSHIEA
6F9E0090
ITEH
Ambient
temp.
range
Temp.
error
Dielectric withÂstand voltage
Imgulse
with-
stand voltage
Insulation
resistance
Vibration
-Oscillation
-1aoulse
Overcurrent
intensity
Output
contact
rating
(250VAC aax. I
SPECIFICATIORS
-10-
*SO%
+10X
at
t30Y
Between terminals and ground
2DOOVAC
for 1
#in.
Between terminals and ground
1 X
40)~s
at
45OOV
(standard waveform)
Between terminals and ground
1DOH Ohm
or
more
when measured with a
SDOVDC
aegger.
Amplitude
2.5~ - 20Hz (26)
156
40 times of max. continuous current
(SAI,
for 1 sec.,
agglied
twice, in accordance with
JEC 174.
Over Current: SPDT
Under Current; SPDT
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TOSHIBA
6F9E0090
WEHA
AC
Rating
Designation
B300
Inductive load
t-K&-
120
AC
240
24
DC 120
240
ITEH SPECIFICATIONS
Hysteresis
AgDrox.
10X of
ooerating
value.
Power consumption
oDperating
Power
3.5VA
olnput
Circuit
D.lVA
(when 5A is
applied)
Height
.75kg
(1.7
lb)
I
Break Continuous
5A SA
(p.f.-0.4)
3A SA
_--_________________-----------------.
0.3A
!iA
O.l!iA (L/R=15ms)
5A
O.lA
5A
3.
DescriDtion
of
Ooeration
When the detected current exceeds the detection circuit
operating level, the detection delay timer is actuated. If
over-
current is continuously detected for more then the detection delay
time set value, the overcurrent response delay timer is actuated.
Then, if overcurrent is detected when the
resDonse
delay timer has
elapsed, the overcurrent relay is actuated.
If current drops below the undercurrent detection set
ValUe,
the
resgonse
delay timer is actuated, and after the set tile has
exoired,
the undercurrent detection relay is actuated. In the case
of undercurrent detection, the detection delay timer is not actuated.
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