Toshiba Power Supply RC803A HP1 User Manual

I
O N M A N U A L  
C U R R E N T R E L A Y  
C O R P O R A T I O N  
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CONTENTS  
G e n e r a l  
1 .  
2 .  
2
2
2
C h e c k B e f o r e U s i n g  
E x t e r n a l  
2 . 1  
2 . 2  
S p e c i f i c a t i o n s  
3
5
6
6
3 .  
o
f
4.1  
4.2  
b.3  
4.4  
4.5  
O v e r c u r r e n t D e t e c t i o n o n H o t o r s - - - - - - - - - - - - - - - - - - - - - - -  
U n d e r c u r r e n t D e t e c t i o n o n M o t o r s - - - - - - - - - - - - - - - - - - - - - -  
L i m i t i n g S t a r t i n g C u r r e n t o f R o t o r s - - - - - - - - - - - - - - - - - - -  
Transformers  
.
H e a t e r s ,  
a n d O t h e r C i r c u i t s - - - - - - - - - - - - - - - - - - - - -  
5 .  
6 .  
A d j u s t a e n t s - - - - - - - - - -  
1 2  
1 2  
1 2  
1 3  
1 3  
1 7  
6 . 1  
6 . 2  
6 . 3  
S e t t i n g t h e D e t e c t i o n D e l a y  
S e t t i n g t h e R e s p o n s e D e l a y  
l e s t  
- - - - - - - - - - - - - - - - - - - - - -  
- - - - - - - - - - - - - - - - - - - - - - -  
7 .  
8 .  
_ - _ - m - m m - - - - _ _ _ _ - _ _ - _ _ - _ _ - - _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _  
C o v e r  
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Please thoroughly read this instruction  
Current Relay.  
before using the  
1. General  
This current relay is designed to detect current in AC circuits  
with a wide range of  
detection of abnoraai  
due to overloads or broken  
current of  
circuits  
electrical  
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,  
exceed rated current flow in motor  
transforaer circuits. this  
current relay has an adjustable delay circuit to prevent it  
operating during start-up.  
Further, this current  
at the control Dower is applied. and the relay is  
exceeds the level or control  
is fail safe. The relay  
energized when the  
Dower is removed.  
2. Check Before Using  
Before  
this relay. check the following Doints. If any  
defects are found, contact the dealer  
which you purchased this  
relay.  
2.1 External  
Check the relay for any missing Darts and for damage, dirt,  
rust, and loosened caused during transportation.  
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T O S H I B A  
2.2 Specifications  
SPECIFICATIDHS  
(continuous)  
Rated Current  
0.5  
(For current above this range, use a  
Range of current  
sensing  
CT (current transforrer) and connect the  
relay to its secondary side).  
low voltage circuit (below AC  
c i r c u i t  
voltage  
To detect current in high voltage circuits,  
use a CT, and connect the relay  
secondary side.  
its  
Undercurrent  
Overcurrent,  
of Current  
3s  
0.1  
delay  
time-adjustable  
range  
0.1 30s  
Detection delay  
tile-adjustable  
range  
132VAC.  
a 5  
Operating volt.  
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Inductive load  
Break  
Continuous  
120  
240  
24  
AC  
Rating  
AC  
3 A  
Designation  
B300  
DC 120  
240  
5 A  
5 A  
ITEH  
SPECIFICATIONS  
Hysteresis  
10X of  
value.  
Power consumption  
Power  
Circuit  
(when 5A is  
Height  
( 1 . 7  
3 .  
o f  
When the detected current exceeds the detection circuit  
operating level, the detection delay timer is actuated. If  
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  
elapsed, the overcurrent relay is actuated.  
delay timer has  
If current drops below the undercurrent detection set  
delay timer is actuated, and after the set tile has  
the undercurrent detection relay is actuated. In the case  
the  
of undercurrent detection, the detection delay timer is not actuated.  
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Detection delay  
level  
0
Undercurrent detect  
1 Characteristics  
4.1 Overcurrent Detection on  
An  
Is shown in  
2. In this  
an excessive load is detected by detecting the overcurrent of a  
and the is to Protect  
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the  
being damaged.  
and in case of a high voltage circuit, use an external CT and  
If the detected current is above  
connect the secondary side of CT to the relay as shown in the  
following figure:  
Power  
23  
I
I
Current relay  
T h e  
contacts are shown  
with Dower source  
2
using An External CT  
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T O S H I B A  
further, when this relay is used in a  
detection delay should be set  
circuit, the  
than the startinv  
time (about 120%) so that this relay is not actuated by inrush  
If current flowinp in the  
circuit  
abnormal  
current.  
after the  
Deriod of the detection delay timer has  
the relay is actuated when the set  
is over.  
of the response delay  
4.2 Undercurrent Detection on  
To utilize the undercurrent detection function, the  
is used in a circuit with a fixed load, to detect livht  
For in the case of a  
or no load conditions.  
this relay is used to detect undercurrent when the  
water in a water is low, or in case of a thread  
Of  
winding rachine, when the tension of the thread  
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Current relay  
Note: The  
contacts are shown  
with Dower source  
Fig. 3 Application  
4.3  
Startino current of  
Many  
of  
and large capacity use a  
to  
start by limiting starting current.  
detectino the  
circuit current, this relay can automatically advance the  
starting resistance on the secondary side of the motor (in this  
case, the knob of the detection delay timar and that of the  
delay timer should be kept at the minimum  
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4 . 4  
To use this current relay for detecting overcurrent on  
it is necessary to set the detection delay  
with the inrush current of  
taken into consideration.  
4.5 Heaters,  
This relay can be used to detect the disconnection of  
circuits by sensing the existence of current flow.  
words, if disconnection occurs, current does not flow and an  
undercurrent condition is detected by the relay.  
this relay can be used to detect the disconnection of heater  
circuits on constant ovens or heatar circuits for  
and other Circuits  
In other  
For  
insulators on transmission and distribution facilities In  
extremely cold regions.  
5. Hount ing  
See Fig. 4 for uounting dieensions. Be careful not to use this  
relay in the following conditions:  
Locations in aebient  
outside -10  
Locations  
to high  
or dripping water,  
Dusty/dirty locations,  
subject to vibration  
amplitude  
or  
20  
or and shock (above  
in 3 directions).  
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50  
Hole  
Hountino holes  
Fig. 4 Dimensions  
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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  
of the relay. Calculate the  
to the detected current  
secondary 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:  
load  
TO avoid detection during start-up, set the delay tire to  
120% of starting  
load  
(2)  
If the inrush current (inrush time varies  
is large, set the delay  
120% of this inrush  
inrush is short and therefore, even when the  
to  
the  
is  
adjusting knob is set at the  
not be any nuisance tripping.  
position. there should  
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6.3 Setting the  
Adjust the set  
delay  
according to the  
of detection (I.e.  
overcurrent or undercurrent). The set tire for the  
delay varies ger  
any delay  
Host applications  
not need  
It is  
used to prevent nuisance  
load  
(ride through) by ignoring  
7 .  
l e s t  
Check both the control and detection circuits to confirm there  
is no  
(2) Check if the current  
delay settings are correct.  
If the wiring ard settings are correct, energize the control  
circuit and check if it is the voltage.  
delay, and  
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(4) When the Dower source is  
the input signal end the  
the relay is excited and the  
between  
Table 2.  
contact’s states are reversed. The  
contacts are shown  
Check this relationship during the test.  
Table 2  
is found when the Dower source is  
the rain circuit switch ON and the following checks:  
If no  
turn  
In the case of a motor load  
If the set delay is too short, the relay  
be actuated. In such a case, reset the detection delay  
adjusting knob accordingly. After the start-up delay  
has  
apply current above the set detection value  
that the relay functions (after the  
to  
delay  
indicating  
In addition, check that the detection  
lights at the  
time the relay  
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T O S H I B A  
When undercurrent or disconnection is detected  
At the time the circuit switch is turned  
starting current and rated current flows, and the relay is  
picked UP. If current below the undercurrent set point,  
the  
the undercurrent State is detected and the relay  
(Refer to Fig. 5)  
out.  
If input signal to this current relay is zero (When  
Caution:  
it is not possible to judge if it is undercurrent or in a  
disconnected state. In this case, it is recommended to  
have a circuit connecting a  
tact of the circuit switch in series with the  
circuit. this will Drevent the relay fror  
fault condition during a shutdown.  
auxiliary con-  
or  
a
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(6) If the relay does not operate in the above test, check if  
the current setting is correct or if the  
above the set detection value.  
signal is  
signal is  
If the  
correct, check the operation of the relay by gradually  
reducing the setting of the current adjusting knob.  
If the  
relay still does not  
please contact the dealer  
or Toshiba.  
it is defective.  
In this case,  
which you purchased the relay  
Power Source  
Detected current  
Overcurrent  
detect ion  
T3  
Undercurrant  
detect ion  
I
Detection delay tire  
T2: Overcurrent detecting resgonse delay  
T3: Undercurrent detecting resgonse delay  
Fig. Relay Operation  
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T O S H I B A  
8. Cover  
To adjust the current and  
the cover by  
as shown below. To replace the cover,  
cover in the out oreventive hole and then insert the bosses  
of the cover into the 2 holes at the left and right.  
settings the cover  
a force in the direction of the arrow  
the projection of the  
be raaoved.  
Cover  
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T O S H I B A C O R P O R A T I O N  
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