Circutor CR-250 Manual de usuario

CURRENT INJECTION

RELAY TESTER

CR-250

( Code P60213 (770070) )

INSTRUCTIONS MANUAL

( M 981 330 05A )

(c)

CIRCUTOR S.A.

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 2

CURRENT INJECTION RELAY TESTER CR-250

1.- CR-250 DESCRIPTION

CR-250 is a current source specially designed for testing the current/time

curves of automatic switches and indirect protection relays.

The CR250 consists of an adjusta le current source, a control circuit and a

measurement unit.

- The current source is supplied y the mains, at 230Vac and is provided

with an adjusta le autotransformer, a separation transformer with two

independent outputs and corresponding output terminals.

This circuit is protected y 20A automatic reaker and is provided also

with an output to supply the 2500 A transformer (Code: P69903 (770071))

- The control circuit consists of an ON/OFF element, indications and

voltage free external terminals to e connected to the contact (NC or NO)

of the relay to e tested.

- The measurement unit is synchronized with the start and stop of the

current circuit. It consists of a digital ammeter and chronometer. The

measurement unit and the control circuit are protected y a fuse.

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 3

2.- MAIN CHARACTERISTICS

SUPPLY:

- Voltage 230Vac + 10% - 15 %, single phase - 50.....60 Hz

- 20 A maximum

ADJUSTABLE CURRENT SOURCE

- Outputs: 0 - 30V, 50A ma . 1500 VA

0 - 6V, 250A ma . 1500 VA

- Isolated circuit

- Maximum overcurrent: 1,25 In, 1 minute

- Current adjustment y turning control kno

- Output y means of the 1A/200A transformer; power 4000 VA-

2500 A max. (optional)

CURRENT MEASUREMENT

- Digital ammeter with following scales:

19,99A 199,9A 999A 999 10A

- Preselection of the scales y scale selector

- Out of scale indication

- Protection against over current

- Accuracy : ± (0.5 % of readout + 0,5% Full scale)

TEST TIME MEASUREMENT

Digital chronometer up to 9999,99 seconds

TEST CONTROL

- Start : By means of ‘ON’ utton

- Stop : Automatic y external NC contact

Automatic y external NO contact

Manual y ‘OFF’ utton

- The time of the test is shown in the chronometer display until the "Reset"

utton is pressed.

DIMENSIONS, WEIGHT

- Dimensions : 500 x 415 x 280 mm

- Approximate weight : 43 kg.

ACCESSORIES (included)

2 ca les of 6 m for test up to 250 A

2 ca les of 6 m for test up to 30 A

1 ca le for control of the chronometer

1 instruction manual

OPTIONAL ACCESSORIES 2500A

- Transformer 1A/200A (2500 A) ( code P69903 (770071) )

- Ca le - 1,5m - 2500A ( code P69902 (770072) )

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 4

3.- INSTALLATION AND START-UP

The manual you hold in your hands contains information

and warnings that the user should respect in order to guarantee

a proper operation of all the instrument functions and keep its

safety conditions.

Whether the instrument is not used as manufacturer’s specifications,

the protection of the instrument can be damaged.

When any protection failure is suspected to exist (for example, it

presents external visi le damages), the instrument must e immediately

powered off. In this case contact a qualified service representative.

3.2.- CONNECTION UP TO 250A

Once the necessary test current is determined, the CR-250 can e

connected to the relay to e tested.

- If the necessary current is higher than 30A, the 70 mm

section ca les

have to e used.

- For current of 30A or lower, the 6 mm

section ca le have to e used.

- The terminals are chosen according to the required current (up to 50A or

up to 250A), the common is the same for oth current ranges.

- If it is assumed that the Stop at the end of the test is done automatically,

it is necessary also to connect two ca les at the ‘EXTERNAL CONTACT-

NC/NO ’ terminals and at the contacts of the relay under test. Also the

switch has to e set according to the function of the contacts of the relay

under test:

NC: normally closed (stops when opening)

NO: normally open (stops when closing)

- In case the stop has to e done manually, the ‘OFF’ utton has to e

used. In this case no ca le need to e connected to the ‘EXTERNAL

CONTACT-NC/NO’ terminals and the switch has to e set to the ‘ADJUST’

position.

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 5

3.2.- CONNECTION UP TO 2500 A (optional)

In this case, the 1A/200A (2500 VA) transformer that can e ordered as

optional accessory for the CR-250 is used.

Due to the large currents that can e o tained, it is necessary that the

distances are as minimal as possi le and all connections perfect. For the

connection, the 1,5m ca le, that is supplied as accessory, can e used.

The 1A/200A transformer is supplied from the CR-250 y the 6mm section

ca le delivered with the CR-250 and connected to the 0-250V output at the

ack side of the CR-250.

The connection of the ‘EXTERNAL CONTACT-NC/NO’ is as descri ed in

the previous section.

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 6

4.- TESTING THE RELAY

PREVIOUS ADJUSTMENT

- The ammeter has to e set to the 999A scale (or 10 x 999 scale in case

the 1A/200A, 2500 VA transformer is used)

- The switch is set to the ‘ADJUST’ position.

- With the turning kno in the 0% position, the ‘ON’ utton is pressed and

the required current can e adjusted.



THE ADJUSTMENT TIME HAS TO BE AS SHORT AS POSSIBLE TO

AVOID PREVIOUS WARMING OF THE RELAY. IN ANY CASE, A

CERTAIN COOLING DOWN TIME HAS TO BE PASSED BEFORE

EXECUTING THE TEST.

TEST

- The switch is set to the required position (NC or NO).

- The correct setting of the ammeter has to e set in order to get the

maximum accuracy in the read-out.

- The RESET utton has to e pressed to set the chronometer to’0’

- Now the ‘ON’ utton can e pressed that starts the flow of the selected

current and the chronometer will start to count.



If the CR250 is not starting to test, pro a ly the NO / NC switch is in

the wrong position.

DURING THE TEST, AS THE TEMPERATURE OF THE RELAY UNDER

TEST WILL CHANGE, ALSO THE FLOWING CURRENT WILL CHANGE.

IT IS THEREFORE NECESSARY TO READJUST THE CURRENT

FREQUENTLY TO MAINTAIN THE CURRENT AT THE REQUIRED

VALUE.

If the stop is automatical, the test is stopped when the relay contact trips. In

case the stop has to e manual, the ‘OFF’ utton has to e pressed

immediately when the relay trips.

In oth cases, the duration of the test will e indicated in the chronometer

display until the ‘RESET’ utton is pressed.

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 7

5.- INTERPRETATION OF THE RESULTS

The goal of the test is to know tripping time of a relay for a previous set

over-current. The CR-250 relay tripping tester from CIRCUTOR allows the

read-out of this time y means of a digital chronometer. The result is given

in seconds, decimals and hundreds of seconds. It is the responsi ility of

the operator that the current stays sta le on the set value during the whole

test.

6.- SAFETY CONSIDERATIONS

All installation specification descri ed at the previous

chapters named INSTALLATION AND START-UP,

INSTALLATION MODES and SPECIFICATIONS.

Note that with the instrument powered on, the

terminals could e dangerous to touching and cover opening actions or

elements removal may allow accessing dangerous parts. This instrument is

factory-shipped at proper operation condition.

7.- MAINTENANCE

The CR-250 does not require any special maintenance. No

adjustment, maintenance or repairing action should e done over the

instrument open and powered and, should those actions are essential,

high-qualified operators must perform them.

Before any adjustment, replacement, maintenance or repairing

operation is carried out, the instrument must e disconnected from any

power supply source.

When any protection failure is suspected to exist, the instrument

must e immediately put our of service. The instrument’s design allow a

quick replacement in case of any failure.

8.- TECHNICAL SERVICE

For any inquiry a out the instrument performance or whether any

failure happens, contact to CIRCUTOR’s technical service.

CIRCUTOR S.A. - After-sales service

VIAL SANT JORDI, S/N

082 2 VILADECAVALLS (BARCELONA)

Tel - + 4 9 745 29 00 - fax - + 4 9 745 29 14

E-mail : central@circutor.es

We : www.circutor.com

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 8

ANNEX A

MAIN ELEMENTS (FRONT PART)

RESET ON

OFF

N C N O ON

19,99

199,9

999 999 10

ADJUST

CR-250

Regulator of

current

ON : Indicating

light signal

DIGITAL

AMMETER

Scale buttons

for Ammeter

ON: Start Button

OFF: Stop Button

Reset button for chronometer

CHRONOMETER

Selector

NC / ADJUST /NO

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 9

ANNEX B

MAIN ELEMENTS: CONNECTIONS ( REAR PART)

50250COMMON

I. Ma .

0 --- 250 V

OFF

OUT

Power supply 230 V a.c.

(With fuse )

Magnetothermic

relay

In = 20 A

E ternal contact

Regulated output :

suitable for connection

of the 1 A / 200 A CT

OUTPUTS :

Common- 250 : ma imum 250 A -6 V

Common - 50 : ma imum 50 A - 6 V

---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 10

ANNEX C

CURRENT TRANSFORMER :

TI-2500 A ( 1 / 200 A )

Power

: 4000 VA

Primary : 0 ... 250 V a.c.

0 ... 16 A

50 Hz / 60 Hz

Secondary : 0 ... 1.6 V

0 ... 2500 A

Dimensions :

Ext. : 300x250x160 mm

Useful diameter : 60 mm

(P6990 )

PRIMARY

CABLE

TI-2500 A

(included

with the

transformer)

(P6990 )

CR-250

REAR PART

(P6021 )

CONNECTION DIAGRAM : CR-250

WITH THE TRANSFORMER TI-2500 A

RELAY

TO TEST

CABLE :

Length :

500 mm

1.5 m

(P69902)

Note: Due the high flowing currents that will e o tained, very chort distances

and perfect connections will e required.

50250COMMON

I. Ma .

0 --- 250 V

OFF

OUT

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