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Summary of Contents for Circutor CR-250
- Page 1 CURRENT INJECTION RELAY TESTER CR-250 ( Code P60213 (770070) ) INSTRUCTIONS MANUAL ( M 981 330 / 05A ) CIRCUTOR S.A.
- 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 adjustable current source, a control circuit and a measurement unit.
- Page 3 ---- 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 max. 1500 VA 0 - 6V, 250A max.
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Page 4: Installation And Start-Up
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 be connected to the relay to be tested. - If the necessary current is higher than 30A, the 70 mm section cables have to be used. - Page 5 1,5m cable, that is supplied as accessory, can be used. The 1A/200A transformer is supplied from the CR-250 by the 6mm section cable delivered with the CR-250 and connected to the 0-250V output at the back side of the CR-250.
- Page 6 ---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 6 4.- TESTING THE RELAY PREVIOUS ADJUSTMENT - The ammeter has to be 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’...
- Page 7 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 by means of a digital chronometer. The result is given in seconds, decimals and hundreds of seconds.
- Page 8 ---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 8 ANNEX A MAIN ELEMENTS (FRONT PART) Reset button for chronometer ON: Start Button CHRONOMETER OFF: Stop Button Scale buttons RESET 19,99 199,9 999 999 x 10 for Ammeter DIGITAL AMMETER ADJUST...
- Page 9 ---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 9 ANNEX B MAIN ELEMENTS: CONNECTIONS ( REAR PART) Regulated output : Power supply 230 V a.c. External contact suitable for connection (With fuse ) of the 1 A / 200 A CT...
- Page 10 ---- CURRENT- TIME TRIP TESTER CR-250 --------------- Page 10 ANNEX C CONNECTION DIAGRAM : CR-250 WITH THE TI-2500 A TRANSFORMER CR-250 0 --- 250 V REAR PART (P60213) I. Max. COMMON PRIMARY CABLE TI-2500 A (included with the transformer) (P69903)
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