Toshiba RC803A-HP1 User Manual

TOSHIBA

I

NSTRUCTI

ON MANUAL

CURRENT RELAY

RC803A-HP1

TOSHIEA

CORPORATION

TOSHIBA

6F9E0090

CONTENTS

1.

2.

3.

4.

General

Descrigtion

Check Before Using

2.1

External

2.2 Specifications

DescriDtion
Applications

of

__-______-_________----------------------------

__-----_-__----____---------------------

-__-----__-_---_-_______________________-

Amearance

-_-_-_---_-__-__-_----------------

_--_---_-__-__--_-__-------------------

ODeration

__-______-_______-__---------------

2
2
2

3

5

6

4.1 Overcurrent Detection on Hotors ----------------------- 6

4.2 Undercurrent Detection on Motors ----------------------

b.3

-

4.4

4.5 Heaters,

5.

Mounting

Limiting Starting Current of Rotors -------------------

Transformers

---____----___-_-_-_____________________-----------

-__----__-__-___-___----------------------

Laape

and Other Circuits ---------------------

0
9

.

10
10
10

6.

7.

8.

--__-_----______---___________________

____-----_-_____-______________________

6.1

Adjustaents ----------

Current

Setting

6.2 Setting the Detection Delay

6.3

Setting the Response Delay

Ogerat ional

Cover

Reaoval

lest

____--_____--___________________________---

_-_-m-mm--- -____-__-__-__--___-_______________

Tiae

---------------------- 12

Tiae

----------------------- 13

12
12

13

17

- l-

=rosHl=A

6F9E0090

Please thoroughly read this instruction

RC803A

1. General

Current

This current relay is designed to detect current in AC circuits
with a wide range of
current of
circuits
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 or transforaer circuits. this
current relay has an adjustable delay circuit to prevent it

operating during start-up.

SensinD

DescriDtion

VariOUS

(e.g.,

Relay.

aDDiications, e.t.,

electrical

heater circuits), detection of starting current to

eauiment

manual

detection of abnoraai

due to overloads or broken

before using the

lay

fro&

Further, this current

-

at the
energized when the

Dower is removed.

2. Check Before Using

defects are found, contact the dealer

relay.

2.1 External

saae tile

Before

Check the relay for any missing Darts and for damage, dirt,

rust, and loosened

control Dower is applied. and the relay is

inout signal

using

this relay. check the following Doints. If any

Aopearance

screi6

relay

is fail safe. The relay

exceeds the

free

caused during transportation.

Dreset

which you purchased this

level or control

ooerates

de-

-2-

TOSHIBA

2.2 Specifications

_____________-_-________________________------------------------------

6F9EO090

ITEH

Rated Current

Range of current
sensing

Inout

circuit

voltage

Type

of Current

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

3

To detect current in high voltage circuits,

6OOV)

use a CT, and connect the relay to its

secondary side.

Overcurrent,

Undercurrent

ReSDOnSe

delay

time-adjustable
range

Detection delay
tile-adjustable

range

Operating volt.

-

3s

0.1

0.1 - 30s

a5

132VAC.

-

170 -

250VAC,

50/6Diiz

i

- 3-

TOSHIEA

6F9E0090

ITEH

Ambient

range

Temp.

Dielectric with­stand voltage

Imgulse

stand voltage

Insulation

resistance

-

temp.

error

with-

-10-

+10X

at

Between terminals and ground

2DOOVAC

Between terminals and ground

1 X

40)~s

Between terminals and ground

more

when measured with a

SPECIFICATIORS

*SO%

t30Y

for 1

at

#in.

45OOV

(standard waveform)

SDOVDC

1DOH Ohm

aegger.

or

Vibration

-Oscillation

-1aoulse

Overcurrent

intensity

Output

rating

(250VAC aax. I

contact

Amplitude

156

40 times of max. continuous current

for 1 sec.,

JEC 174.

Over Current: SPDT
Under Current; SPDT

2.5~ - 20Hz (26)

agglied

twice, in accordance with

(SAI,

- 4-

TOSHIBA

6F9E0090

Inductive load

t-K&-

120

WEHA

AC

Rating

Designation

B300

ITEH SPECIFICATIONS

Hysteresis

AC

240

24

DC 120

240

AgDrox.

Break Continuous

5A SA

3A SA

_--_________________-----------------.

0.3A
O.l!iA (L/R=15ms)
O.lA

10X of

(p.f.-0.4)

ooerating

I

!iA

5A

5A

value.

-

Power consumption

Height

3.

DescriDtion

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.

If current drops below the undercurrent detection set

the

resgonse

of

Ooeration

delay timer is actuated, and after the set tile has

oDperating
olnput

.75kg

Circuit

(1.7

Power

D.lVA

lb)

3.5VA

(when 5A is

resDonse

delay timer has

applied)

over-

ValUe,

exoired,

of undercurrent detection, the detection delay timer is not actuated.

the undercurrent detection relay is actuated. In the case

-5-

TOSHIBA

.I .pL1

4

mrellt

6F9E0090

Detection delay

level

0

\

Undercurrent detect

1.

APDl ication

4.1 Overcurrent Detection on

an excessive load is detected by detecting the overcurrent of a

motor

(0.3-O.b5A)

An

aDDlication example

and the

lain circuit

img

FiD.

1 Characteristics

Hotors

Is shown in

is

ooend

Fig.

to Protect

2. In this

clrcult.

- 6-

TOSHIBA

6F9Eoo90

the

uotor from

!iA.

and in case of a high voltage circuit, use an external CT and

connect the secondary side of CT to the relay as shown in the

following figure:

being damaged.

If the detected current is above

AC3-Phase

Ll

Power

SuDDly

Y

23

I

#

I1

Current relay

1

A

=

I

‘I

Note:

The

RCB03’s OUtDUt

contacts are shown
with Dower source

TiD.

2

ADDlication ExaaDle

aDDl ied.

using An External CT

TOSHIBA

6F9E0090

further, when this relay is used in a
detection delay
time (about 120%) so that this relay is not actuated by inrush

current.
after the

the relay is actuated when the set

tiler

is over.

4.2 Undercurrent Detection on

is used in a

or no load conditions.
this relay is used to detect undercurrent when the

If current flowinp in the

tiee

To utilize the undercurrent detection function, the

timer

should be set

Deriod of the detection delay timer has

notor

circuit with a fixed load, to detect livht

Hotors

For

examDIe.

uotor

circuit, the

lonfler

uain

tiue

in the case of a

than the startinv

circuit

of the response delay

becomes

VOlUue

abnormal

elapsed.

relay

DUUD UOtOr,

Of

water

-

winding rachine, when the tension of the thread

SUDDlied

in a water

Dipe

is low, or in case of a thread

droes.

TOSHIBA

ACJ-Phase Power SUDDIY

6F9EOO90

Current relay

4.3

Note: The

Fig. 3 Application

Limiting

start by limiting starting current. 8y detectino the
circuit current, this relay can automatically advance the
starting resistance on the secondary side of the motor (in this

Startino current of

Many

eotors

of

uediua

Example

Rotors

and large capacity use a

RC803’s outDut

contacts are shown
with Dower source

aDDl ied.

aethod

to

lain

case, the knob of the detection delay timar and that of the

resoonse

delay timer should be kept at the minimum

settings).

-9-

ToSHIEA

6F9EOO90

4.4

4.5 Heaters,

Transformers

To use this current relay for detecting overcurrent on

transformers.

with the inrush current of

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

insulators on transmission and distribution facilities In

it is necessary to set the detection delay

LauDs

and other Circuits

temperature

transforeer

ovens or heatar circuits for

taken into consideration.

In other

For

exaeDle.

tiler

extremely cold regions.

5. Hount ing
See Fig. 4 for uounting dieensions. Be careful not to use this

relay in the following conditions:

(1)

Locations in aebient

(2)

Locations

(3)

Dusty/dirty locations,

(4) LOCatiOnS

20

tiles/m.

subject

subject to vibration

or

teeperatures

to high

aore)

and shock (above

outside -10 -

teeDeratUre, steal

(total

amplitude

156

+SO”C.

or dripping water,

2.5~

or

eore,

in 3 directions).

4
8

z

- lo-

TOSHISA

6F9E0090

B
!3

t.

50

z

7

Hountino holes

Fig. 4 Dimensions

3-$7

Hole

- ll-

TOSHIBA

6.

AdjustDents

6.1 Current setting

GF9EOO90

(1) When detected current is in a range of 0.5 -

After confirming that the current value under

condition is in a range of 0.5 -

adjusting knob to the desired detecting value.

(2)

When detected current is above

Using an external CT (current transformer),
for the detected Current value, connect the secondary side of
the CT to the
secondary current
value, based on the CT ratio. Then set the current adjusting
Knob to this calculated value.

-

6.2 Setting the detection delay

input terminal

CorresDonding

tiae

of the relay. Calculate the

SA,

set the current

5A:

to the detected current

5A:

noraal

properly

load

suited

Setting time varies depending
Adjust the detection delay

(1) Hotor

(2)

load

TO avoid detection during start-up, set the delay tire to

aDDroxisately
Transformer

If the inrush current (inrush time varies

caDacity)

120% of this inrush

Wall,

adjusting knob is set at the

not be any nuisance tripping.

inrush

120% of starting

load

is large, set the delay

time

is short and therefore, even when the

upon

each individual

tile

according to the following:

tile.

tile

to

tile. Genenrally, If

minims

position. there should

aDDlication.

deDending uDon

approximately

the

caDacity

is

- 12-

TOSHIEA

6F9Eoo9o

6.3 Setting the
Adjust the set
overcurrent or undercurrent). The set tire for the
delay varies ger

any delay

(ride through) by ignoring

7.

Ooerational

(1)

Check both the control and detection circuits to confirm there

is no

(2) Check if the current

tiae

eis-wiring.

delay settings are correct.

ResDonse

tile.

lest

delay

tile

according to the

aDDllcation.

It is

dedtction tiae

aainly

time

used to prevent nuisance

aoeentary

ourgose

Host applications

load

delay, and

of detection (I.e.

gliches.

resoonse

cay

not need

resgonse

trioging

(3)

If the wiring ard settings are correct, energize the control

-

circuit and check if it is the

erooer

voltage.

-13-

TOSHIBA

6F9E0090

(4) When the Dower source is

OutDut

the input signal end the
Check this relationship during the test.

contact’s states are reversed. The

aDDlied.

outDut

contacts are shown in Table 2.

the relay is excited and the

relationshiD

between

(5)

If no

Droblea

the rain circuit switch ON and

(a)

In the case of a motor load

If the set
be actuated. In such a case, reset the detection delay

adjusting knob accordingly. After the start-up

has
to

delay

indicating

is found when the Dower source is

start-up tiae

exDired.

confirm

tile),

apply current above the set detection value

that the relay functions (after the

In addition, check that the detection

lamp

lights at the

Table 2

aDDlied.

Derforg

delay is too short, the relay

the following checks:

sale

time the relay

turn

tiae

delay

resoonse

ODerates.

say

tiae

- 14-

TOSHIBA

(b)

When undercurrent or disconnection is detected

6F9E0090

Caution:

At the
starting current and rated current flows, and the relay is
picked UP. If current

the undercurrent State is detected and the relay
(Refer to Fig. 5)
If input signal to this current relay is zero (When

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

IauD

fault condition during a

sale

time the

Dain

circuit switch in series with the

circuit. this will Drevent the relay fror

lain

circuit switch is turned

drODS

below the undercurrent set point,

normally oDen

normal

shutdown.

auxiliary con-

OH,

the

drops

out.

StoDDed).

alara

signalling

or

a

-

- 15-

TOSHIBA

(6) If the relay does not operate in the above test, check if

6F9E0090

Power Source

the current setting is correct or if the

above the set detection value.
correct, check the operation of the relay by gradually

reducing the setting of the current adjusting knob.

relay still does not
please contact the dealer
or Toshiba.

-

ooerate.

froa

If the

it is defective.

which you purchased the relay

ingut

ingut

signal is

signal is

In this case,

If the

Detected current

Overcurrent

detect ion

Undercurrant

detect ion

­I-/

T3

I

Tl:

Detection delay tire
T2: Overcurrent detecting resgonse delay
T3: Undercurrent detecting resgonse delay

Fig. !i Relay Operation

tiler

tlaer

-

16-

TOSHIBA

6F9E0090

8. Cover
To adjust the current and

Reaove

as shown below. To replace the cover,
cover in the

of the cover into the 2 holes at the

Reroval

the cover by

slip

out oreventive hole and then insert the bosses

amlYing

time

a force in the direction of the arrow

settings the cover

place

the projection of the

uooer

left and right.

Cover

Ak

must

be raaoved.

-

i

z

- 17.-

TOSHIBA CORPORATION

-