Technical Data - 2000.4 English TTIIMMEERRSS S.p.A ISO 9001 STANDARD The power in relays and timers since 1954Terminology RATED VOLTAGE - it is the nominal value of the operating voltage of the circuit by which the relay is designed to be supplied and operate. The relays operating and use characteristics are referred to the rated voltage (EN 61810-1). OPERATING RANGE - it is the range between the minimum and the maximum pick-up voltage. DIELECTRIC STRENGTH - dielctric strength tests are carried out by applying a specified AC voltage (at 50 hz) for 1 minute between two circuits (ex. between coil and contacts, between adjacent contacts, between open contacts), and verifying that the leakage current does not overrun 10 mA. During the final 100% tests, the specified voltage is increased by 10%, and applied for 1 second. This refers to the rms value. INSULATION GROUP - according to VDE 0110. MECHANICAL LIFE - this test is carried out by energizing the coil without any load applied to the contacts, in order to check metal parts life, solder and residual magnetism intensity, which is checked by connecting one phase of each relay coil in parallel, while the other phase in connected to a contact of a pilot relay. This makes each relay independent in order to avoid induced counter electromotive force which could facilitate the drop-out of the relay withsome residual magnetism (EN 61810-1) still on. AMBIENT TEMPERATURE - it is the temperature of the actual area where the relay is located in which a good operation of the relay is guaranteed. The relay is energized at the rated voltage (or at the voltage indicated in the diagrams, which shows the trend of operating minimum voltage versus temperature). All technical data in this catalogue refer to an ambient temperature +20C. TIME SETTING - range in which it is possible to set timing using the time scales. REPEATABILITY - difference between the upper and lower limits of the confidence range from several time measurements of a specified time relay under identical stated conditions. Preferably the repeatability is indicated as a percentage of the mean value of all measured values. SETTING ACCURACY - difference between the measured value of the specified time and the reference value set on the scale. RECOVERY TIME - necessary time to start the relay again with the defined accuracy after the input energizing quantity has been taken away. CONTACT SPECIFICATION RATED POWER - it is the maximum switching power or maximum power value (in VA) with resistive load in AC, that a contact can make, hold and break many times. RATED CURRENT - this is the current for continuous duty, which is the highest value (rms value in AC) that a contact can continuously hold within the prescribed temperature limits. It coincides with the cycling capacity, that is the current that a contact can make, hold and break many times (EN 60225-23). MAXIMUM PEAK CURRENT - the highest value of current (rms value in AC) that a contact can make and cycle for not more than 0.5 seconds, and with a duty cycle (DC) not higher than 0.1, without undergoing a permanent degradation of its characteristics due to generated heat (EN 60225-23). RATED VOLTAGE - it is the ratio between the rated power and the rated current. MAXIMUM SWITCHING VOLTAGE - it is the highest voltage level that the contacts can switch. It is higher than or equal to the rated voltage. BREAKING CAPACITY IN DC1 - for DC1 loads, it is the maximum value of current which contacts can switch, depending on the value of the load voltage, without any protection circuits. SINGLE PHASE MOTOR RATING - it is the nominal value of the motors power, using AC3 category, cos = 0.7, 250 V maximum that a relay can control according to EN 60947-1, UL 508 e CSA 22.2 No.14.