Toshiba RC820-HP-Y, RC820 Series, RC820-AP-Y Instruction Manual

TOSHIBA

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6F9E0092

RC820 (2E RELAY)

INSTRUCTION MANUAL

RELAY MODELS

RC820-HP-Y-

RC820-AP-Y

AUXILIARY MODULES

RC-81A (GROUND FAULT)

RC-81 B (PHASE REVERSAL)

RC-81C (GROUND FAULT/PHASE REVERSAL)

TOSHIBA CORPORATION

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6F9E0092

C 0 M T E N T

OUTJ,INI:

INITIAL

APPLICATIONS

RATINGS AND

____---_--_________-----------------------

IMSPECTION

----_--------------_-----------

__-_________________-----------------

PERFORXAPJCZS

PRECAUTIONS IN APPLICATIONS

INSTALLATION
CIRCUIT CONSTRUCTIONS

IIOM

TO SET

SELIKTION

AND
INSPECTION AND
TROUBLE-SHOOTING

---_---_-_____-______________________

----------_---_--_--________

---------_-----_-_-_-------------------

ADJUSTEIENTS

MAINTEI4ANCE

-______________-_________________

S

-------------------------

----------------_------

-_-_----_-______________

-----------------------

Page

2

2
2
3
7

I. 0
13
16
17
19
20

INSTALLATION TEST PROCEDURE

GROIJND

FAULT TEST FORM

---------------------------

----------------------

22
24

-l-

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motors) is widely used in various industrial fields to
protect induction motors against overloads and other abnormal
conditions (i.e., single phase, unbalanced phases).
Optional plug-in type modules can be installed which include
the

and

6F9E0092

OUTLINE

The 2E Relay (static relay for three-phase induction

RCRlA
RCRlC

ground fault module,

RCRlB

phase reversal module,

ground fault/phase reversal module.

INITIAL INSPECTION

(1)

Check that the 2E Relay and/or additional module is per
ordering specifications.

(2)

Check the 21: Relay and/or additional module for damage

incurred during shipment (breakage, loose parts).

APPLICATIONS

The

2'3

Relay and/or additional module is

three phase induction motors
only from
phase reversal

ovcrloa~ds

and single phase

an83

ground fault.

used

to protect

and other three-phase loads, not

conditions

but also from

TI

T:
$

-

a

i!

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6F9E 0092

RATINGS AND PERFORMANCES

Table

\

.‘..u,.

Items

:.

Table 1

Type -Form

ists the ratings and performance of the

Ratings

al

nc

1

Performances of the 2E Relay

RI,

--;gl*

82’?--

1

;FE;12

._.

1

-'\

21?

Relay.

..___..

Kzi12m

-.-

-~--_

Wee-phase circuits rated up to 600V AC,

50/60

Applicable ckcuit

HZ - Direct

(Also, applicable to high-voltage circuit:

by

Protective functions

-.

cc&in&q

Dual functions

with high-voltage

(2E

relay) ---- Over load a

CTS)

cd

Single phase protection.

Rat&l

Rated
current

-

ampere-

turns
Setting

range

Ultimate opera-

Gverload

operating
characte-

ting current

Operating time

setting range

ristics

7AT mmG;-

%~150%

of rated

105*125%

of current setting

at-[75+(5+1(l+20+40)%1

3s40 Sec. for starting characteristics at

600% of current setting

[3+(2+5+10+20)

sec.1

Operating time

+20% of tine setting

-

accuracy

Single-phase
protection

3perating

Minimum operat-

ing current

zharacter­istics

Iontrol

voltage

<z
?

operating time

Rating

Tolerance

85% of current setting under one-phase

ccmpletely

either

-- See Fig. 1

Less than 4 sec.

10@~12OV/200+240

loss state (When

remaining

phase.)

--___--.--

V AC,

85% s 110%

-

-

lrd

,

measured

SO/60

HZ

on

-

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L..

\

Itemi

Type

-Form

HP

HPlY12

APlY

1Y

RC

820

HP~Y

T

HPZY12
AP2Y

6F9E0092

-

Control pzw

Power

consmlption

Output
contact
specifications

Fault in&cation

Reset

Application
conditions

r,ode

circuit

Detecting
circuit

contact

arrangement

Contxt

:

capacity

NEMA

Ambient

temp:rature

Relative

hwnidity

I

__-

___-

B300

2 VA

-

0.3 VA/phase at rateJ current

1x0 - NC

12OV

AC-5.OA (Resistive

12OV

AC-3.OA (Inductive load,
125V
250V

RCP?O --H PElY --. Mdnunl R&et
RCH20-HP!

Jr;82G--A~!~~<.~:

45 Q, 85% at 20°C

IX!-0.2A (iJR=7ms)
DC-O.lA (IdR=7ms)

LED

,Y12 Man~algRemote

-10 ?I

(SPDT/FOIIII

Auto

+GOOC

Reset..T&_e _...___

load)

C)

pf=0.40)

Type

Reset

-

_I
s:

!

-

4

-

jl

i

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The

with gold plated pins and their principal ratings are the

a'dditional

modules are connected to the 2E relay

6F9E009'2

same as that of 2E Relay.

range and

Table 2

l-._

parformances.

Ratings and Performances of optional modules

_ T&e-Form

Items

Operating

Phase

current
reversal Operating

zharacteristics

time

Grouncl

fault
current zcr
setting Primary

Maximum

In Table 2 is listed its ratings

RC8lA K81l3 RC81C

\

90% of 2K relay 90% of 2E relay

current setting current

Less than

0.58

Less than

set&y

0.5s

411 s l?A

htput signal

rrip

indication

-______-.

<CT

fault
current

tiround

fault time o.ls~l.os

settitq

output contacts of basic relay

-~~~ __._~

-.-..

LED (manual reset)

__-

12ik4cnA

Connected connected

Impedance :

zoosl 3oos3

l\

~~ \

o.ls~l.os

--

12ii:4omA

Imwance :

-5-

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.I~./,

,l,nl---C~Ilii~.-Overload

Overload operating characteristics

Ultimate operating current --- 105-125 of

Single phase protection operating characteristics

min. operating current --- 85% of current setting

.,. ;

..,-.

+...

.,.+~ .___

operating-

L-./,-characteristics-

6F9E0092

current setting

'?I-Single

NUT,TIPLCS OF

LOAD CURRENT

STARTING

CIIARACTCRISTIC

Fi.g .

-.

0
?i

6

3. Operating characteristic curve

MULTIPLES OF LOAD CURRENT

RUNNING

CliARAC'TEHISTIC

-

6

-

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When planning to use Toshiba Static 2E Relays, be sure

to give full consideration to the following precautions:

6F9E0092

PRECAUTIONS IN APPLICATIONS

(1)

(Control power source supply
The power circuit must be arranged so that control

Ipower

is always supplied to the 2E Relay before the

main circuit is switched ON.

(2) Limit the secondary burden when combining with

external

or high voltage circuit,

cT's.

When the relay is used in a medium

an excessive CT secondary

burden may cause secondary current waveform

distortion.

!;ince

large waveform distortion may be detected as
unbalanced current, limit the external CT secondary
burden according to the overcurrent constant while
referring to Table 3.

Table 3

l(l

or above

Limit of external CT secondary burden

Recommended Secondary Burden
Not greater than 50% of rating
Not greater than 85% of rating
Up to rated burden

-

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(3) Application on DC systems

6F9E009’2

See Fig. 2.
In DC control systems main current does not flow

sinusoidaly even though the power system (voltage)
may be AC,
modules, are not applicable.

so the 2E Relay, and/or additional

Three-phase AC power supply

2E

CT

Thyristor

?-

DCM

23

2E Relay

-

DC Motor

Fig.

2 Example of misapplication of the 2E Relay

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(4) The 2E Relay has phase unbalance detecting charac-

6F9E0092

teristics.

Figure 4 shows how the current's unbal-

anced trip point depends upon the relay's current
setting and the unbalanced current rate.

Current setting

Current

Setting

Current setting

50

-

I max.:

value:iOo%

value:125%

value:150%

Max.

phase

cUrrent

0

:100

0

200 300

-Max.

400

phase

500

600

current (percent of

700

800

current setting)

Fig.

3 Phase unbalance detecting characteristics

-

9

-

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1.

6FPE0092

INSTALLATION

Surface Mounting

The 2E relay will be shipped with mounting feet loose.
Before

installation,

relay as shown Fig. 4.
and hardware will be shipped together with the relay
as standard accessory.

Do not use a screw-locking agent when tightening.

-

attach the mounting feet to the

The below shown mounting feet

Mounting

setting

Time

Feet

Switches

Setting

AcceSSOry

M3.5

ScrfwS

\

-

5CO.20)

Dia-4

Mounting

Trip Indication

Fig.

4 Surface mount type 2E Relay

- -

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2.'

Flush

For

is required.
Before installation, attach the flush mounting fee to the
relay instead of surface mounting feet as shown Fig.5.

Mountins

flush

6F9E0092

mounting, flush mounting kit (order separately)

Flush Mounting Kit

I

EaO(2.36)

kp-4

Parts

Flush Mounting Feet

Flush Cover with Nylatch

M4

Screws

M4 Spring Washers

Mountiny

Nylatch

Panel

Terminal

Quantity

I

I

Conductor

2

1

4

4

I

8(0.32)Dia

-2 Mounting

Holes

-

j

170(2'.75)_jj,'

1.6 Min ‘L 3.2 Max

Fig.

(0.06 min 2, 0.125

5 Flush mount type 2E Relay

-

-

max)

.47+0.2)
.66+0.2)

-

5(0.2)Dia

-4 Mounting

Holes

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Optional Module Installation

3.

Install module with two knurl screws (accessory of

module) as shown Fig. 6 after the relay installation

and wiring to the relay are completed.
For: module installation,

the relay to open the holes for connection pins.

6F9EO092

peel off the side label on

4.8(0.1?)

Dia-2 Kounting

Holes

-

-

-+--

Fin Contacts

+

--

-

-.

-

-11.1

1

i-

z

6OC2.36)

-

P.20’

i

,

1

lsl cl:Y8,

(0.59)

Indicator

Mounting

1

68

Fig. 6A Additional

z
5

m'2dul.e

- -

Fig.

Combination of

relay and additional

module

2l?

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When wiring primary wires through the CT windows, see

Fig. 9, take care of the following:

Primary wires must go through the correct CT windows.

1)

Primary wires must go through in the same direction.

2)

Primary wires must have the same number of turns through

3)

the CT windows.

Before applying the 2E Relay and/or additional module for

low voltage induction motor protection, see Fig. 8, which

illustrates the typical wiring connections.

6F9E0092

CIRCUIT CONSTRUCTIONS

Applying the 2E Relay for high

large capacity systems, see Fig. 9. It is necessary to

-

balance the CT secondary load, that is, CT secondary wire

length.

l pqqgJ-e

Nwnker of turns

e

Vumber

of

turns2

3 passes

voltage,or

Built-in CT window

1

-:==

--.T

low voltage

2

PCs5

Number of turns 3

Fig.

z
!

7

Installation of wires passing through the

built-in CT's

-

-

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6F9E0092

Low-voltage

200V 21 240V AC

pows!r

supply

z

Tow-voltage

induction motor

In case of low-voltage circuits

(rated at 600V or less)

Applied circuit wire is directly passed

through the built-in CT window.

CAUTION:

*

Connections of control power source

AC

100-120V

AC

200-240V

--- Terminals l-2

--- Terminals l-3

** Connections of output contacts

NC-contact (opened when the 2E

Relay operated) --- Terminals 8-9
NO-contact (closed when the
Relay operated)

--- Terminals 9-10

2E

*** Connections of Remote reset switch

Remote reset --- Terminals 4-5

,'Special spec.:

/ Viiriny lenqth,from

\ mu>t

he

1w.s

than

RC820- tl

2F tn reset

:m.

P

CIY

I

SwitLh’

/P

2\\

i

3

i.‘jy. 8

~~~~~~~~~ ~pplicatloll

i.r low-vnlrdg~

-

-

induction

motor circuit

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6F9E0092

Kigh-voltage power

supp1;, 2.3KV % 13.8KV nc

iigh-voltage
:ontactor

A----

PT

Or

Control

transformer

(2.3KV/12OV or 13.8KV,'120V)

I

r

+.;i

contaqm
owatl~

co11

~--1

___-

stop

J-

t-start

M

+

High

voltage

CT

-

+

\

High-voltage CT secondary circuit

wires pass through the windows of

High-voltage
induction

:ootor

the built-in

CT's.

Fig.

9 Typical application to high-voltage induction

motor circuit with ground fault protection

-

15-

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IIOW

TO

6F9E0092

SET

The 213

relay is offered in three models,

Model Ampere-Turn Rating

RC820-F:PlY 7AT
RCDi.O-iiP2Y

RC820-;.:P3Y

with each having

?.n

adjustable (Ampere-Turn) range of

55AT

1lOAT

75%150%.

Each model has direct wiring capability through the three
current transformer's windows. This

(X820-r!P3Y ).

\

. .

the use of

extern;J

For

larger currents, or voltages above
current transformers is required.

Selection of the suitable model

nary calculations.

See "Current Setting Adjustments" to

is limited to 165 amperes

6OOV,

may

require some prelimi-

determine if the calculated "% Dial Setting" can be obtained

-.

with the selected model given the

(FLA).

limiting

Model Selection can also be influenced by wire

the number of turns that can be passed through the

motor's

CT windows (0.75 in. by 0.75 in.).

full load current

Size

a

-

16

-

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(1)

Current Setting Adjustment

6F9E0092

SELECTION AND ADJUSTMENTSSELECTION AND ADJUSTMENTS

N(T)=2E

N(T)

Amp-Turn Rating

-~iotor-F~~ -.--. ~-

: Number of turns through the

x

External CT Ratio*

2E's

built-in CT's,
rounded off to nearest integer (CT wraps are
additive).

Current Setting

.Z

2E Amp-Turn

*

Exts!rnal

CT Ratio: Ex.

%

Motor FLA x N(T)

RAz-xE<ternai

500A/5A

CT's =

~100%

CT Ratio*

1OO:l

If no external CT's are used, substitute with "1.0".

**

For 1.15 Service Factor Motors.

If the motor has a 1.0 S.

F., multiply the calculated Current Setting %" by 0.93.

-

NOTE :

Select the external

CT'S

ratio so that the current sett-

ing 8 is as close to 100% as possible.

Example

Ul:

5OHP,

4GOV

65A

Full Load, 1.15 S.F.

Across-the-line start.

Since the full load falls within the range of the
55 AT

(75 - 150%)

2E Relay's CT's, and no external

CT's are required,
The 8 Dial Setting _

65~1~100%

= 118% = 115% or 120%

55

Example X2: 2OOHP,

46OV,

240A Full Load, 1.15 S.F.

Across-the-line start.

240 Amps exceeds the highest rated 2E Relay,
therefore,

HPlY

, 7 AT rated
standard model when the current exceeds the
rating.

external CT's must be used, and the

2E,

will be chosen as the

If

300/5

CT's are used,

HP3Y 's

2
8

- -

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6F9E0092

the Current Setting 8 = 240 x N(T) x 100%

7 x (300)

5

= N(T) x 57.14%.

And if 2 turns through the 2E Relay's CT windows

(from the external

Setting = 2 x 57.14 = 114% = 110% or 115%

(2) Time setting

Determine the protection curve from 2E Relay operating
curves shown in Fig.

GOO%

of setting current.

switch to the nearest setting above the operating time.

When using the RC81A or

the settings with the same manner mentioned above.

(3)

Fault Indication and Reset
The LED on the 2E relay is illuminated by any trip
condition.

CT'S)

1, and read the operating time at

'Adjust the time setting dip

RC81C

are used, the 8 Dial

with the 2E Relay, determine

-

$
:!

The optional module's have individual indicators (LED's).
When the 2E Relay detects an overload, single phase or
phase unbalance condition, and the LED indicator lights,

throw the reset toggle switch to reset the relay.

2E relay
reversal or ground fault
of the 2E relay and optional module to turn off both LED'S.

equiped

with an optional module detects a phase

n>f!t-

the

-

-

t.G,Jqle swi !( /I

When the

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Before inspection and maintenance, read the following

items to determine the maintenance period.

Intervals of inspection

(1) When the 2E Relay and/or additional module in an ordinary

electric control room is operated under relatively good

environmental conditions . . . . . Approx. annually

(2) When the 2E Relay and/or additional module is operated

6F9E0092

INSPECTION AND MAINTENANCE

under adverse environmental conditions . . . . . Approx.

semi-annually

-

Items to be inspected

(1)

Dust accumulation . . . . .

When dust accumulation or contami-

nation is observed near the current-conducting components,

wipe them clean with a soft, dry cloth.

gasol.ine,

(2)

Loose

(3) Presel:

points of the current-setting and time-setting

bengine,

stress

or other organic solvents.

Do NOT use

switches

(4) Operation of the test switch, if necessary

(5) Operating characteristics, if necessary

(6)

Damage or other defects

-

-

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1n

6F9E0092

TROUBLE-SHOOTING

case of trouble, determine the cause of the trouble

in accordance
After clarifying the cause,
chart to correct the problem.

2~

nelay

with

the sequence shown in Fig. 10 or Fig. 11.

fails to operate

I

take the actions shown in the

I’i”‘l~~~i~~~~~F:..:I.;.;...I..

4

Check the sequence of

primary wires

Incorrect

Correct it

1

r

set current

Operates normally

Fig.

('#hen 2E

10 Trouble-shooting table

Relay fails to operate)

i

- ;o-

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2E

Relay trips during motor

start-up and operation

Check the phase sequence

6F9E0092

Check the motor and

load to eliminate

Abnormal Ch

Operates normally

current value

(See Fig. 1)

Fig. 11 Trouble-shooting table

n

9

(When 2E Relay

operates during motor start-up and operating)

3

-

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6F9E0092

1:NSTALLATION

-

It is not necessary to schedule periodic maintenance

and testing of the ground fault protection.
are desired to confirm the proper operation of the system, one
of the following procedures can be used.

1. Mounted in

corltrol

panel

-

-

Iri--

_~---__--------------------

TEST PROCEDURE

However, if tests

Power

r--------

~;~~~lc~-~--:l,:;ll,

L

___________

Note.

The above figure shows the relay reset. (not tripped).
The resistor in the test unit is for

1.

When testing the ground fault module, keep the main circuit
de-energized.

2.

Set the ground current knob at a proper value of IGS.

(ground fault trip point)

3.

Connect the test wire through the ZCT window as show in
Fig. 12.

4.

Apply control power to the 2E and interrupting device.

5.

Apply

current when the relay operates.

6.

Check the operation of the relay with test switch on the 2E

and check that the LED indicator lights.

7.

If the relay does not operate at the set time, interrupt the
test current.,

1.25xIGS

--------------_------------

Fig.

with the test circuit and interrupt the

cheek the current setting and the repeat test.

12 Test circuit

currtnt llr~:~?in~j.

--------

+
Y

-

--j

-

-

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2.

Bc?nch

Test

r--------------------

II

II
II
II

II

GROUNDGROUND

CURRENT- DELAY

CURRENT- DELAY

DETECTDETECT

-

-

OUTPUT

OUTPUT

,---

6F9EOo92

-----------t---t

77

M

I

Pl

I+

2-l

;RCDlA or RCBlC
L-_----------------------------J

I

-

Note.

The above figure shows the relay

The resistor in the test unit is for current limiting.

1.

Connect the sensor and relay as shown in FIG. 13.

2.

Set the ground current knob at a proper value of IGS (ground
fault trip point).

3.

Apply

current when the relay operates.

4.

Check the operation of the relay with the test switch on

the 2E and check that the LED indicator lights.

5.

If relay does not operate at the
current,

I
II

W820

L.

1.25xIGS

check the

Fig.

with the test circuit and interrupt the

13 Test circuit

culrbnt

sett.iny nt\~ repeat ihe th<(;.

reset.(not

settilm,interrul>t

i-u

I

tripped).

P2

POk

s"p

-

I

TER

‘PLY

t

I

‘,hc: “es-l:

- 23-

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6F9E0097

vo.

--

Date

-

Gl'?-;“- P..UL:

-

Setting

--.-

T:...:

Test current

---..

F...:..

Result

Not

.e

-

1

-

-

-