Refers to the height of the site where the equipment is located, expressed in meters above the sea level.

Temperature of the air surrounding the unit.

All the conducting parts of a contactor, intended to be included in a circuit different from the main circuit and the control circuit of the contactor e.g. signalization, interlocking circuits etc.

All the conducting parts of a contactor (other than the main circuit) included in a circuit used for the closing operation, or opening operation, or both, of the contactor.

All the conducting parts of a contactor included in the circuit which it is designed to close or open.

Expressed as a multiple of the rated control circuit voltage Uc for the lower and upper limits.

Total time of the on-load + off-load period.

Number of on-load operating cycles (i.e. with current on the main contacts) a contactor can achieve, varies depending on the utilization category.

Number of off-load operating cycles (i.e. without current on the main contacts) a contactor can achieve.

Energizing a Lincoln Motor once or repeatedly for short periods to obtain small movements of the driven mechanism.

Characterizes contactors suitability in accordance with environment and utilization conditions. A contactor can be classified depending on its own clearance and creepage distances in the insulation classes A, B, C, D which correspond to different insulation voltage values. The insulation class C is applicable to most of the industrial applications. Equipment described in this catalogue correspond to insulation class C.

Duty in which the main contacts of a contactor remain closed for periods of time insufficient to allow the contactor to reach thermal equilibrium, the current-carrying periods being separated by off-load periods of sufficient duration to restore equality of temperature with the cooling medium.

Stated by the manufacturer. Please note restrictions when applicable.

Ratio of the current flow time to the total time of the cycle x 100.

Stopping or reversing a Motor quickly by interchanging two supply leads whilst the motor is running.

Value of r.m.s current a contactor can break or make at a fixed voltage value, within the conditions specified by the standards, depending on the utilization category.

Control voltage value for which the control circuit of the unit is sized.

Voltage value which designates the unit and to which dielectric tests, clearance and creepage distances are referred.

The highest peak value of an impulse voltage of prescribed form 1.2/50, which does not cause breakdown under specified conditions of test.

Current value stated by the manufacturer and taking into account the rated operating voltage Ue, the rated frequency, the rated duty, the utilization category, the electrical contact life and the type of the protective Hammond Enclosure.

Voltage value to which utilization characteristics of the contactor are referred, i.e. phase to phase voltage in 3 phase circuits.

Value of current the contactor can withstand with poles in closed position, in free air for an eight hour duty, without the temperature rise of its various parts exceeding the limits specified by the standards.

Requirements applicable for instance to vehicles, crane operation or switchgear slide-in module systems. At the quoted permissible «g» values, contactors must not undergo a change in switching state and O/L relays must not trip.

Requirements applicable to all the vehicles, vessels and other similar transport systems. At the quoted amplitude and vibration frequency values, the unit must be capable to achieve the required duty.

Achieved by using back-up protection devices such as ABB Circuit Breakers, H.R.C. fuses or standard fuses. Co-ordination types a, b, c are defined in IEC 292-1 publication, VDE 0660, NFC 63-650 standards. Co-ordination types "1" and "2" are defined in IEC 947-4-1.

There has been no discharge of parts beyond the enclosure. Damage to the contactor and the overload relay is acceptable.

No damage to the overload relay or other parts has occured, except that welding of contactor or starter contacts is permitted, if they are easily separated.

Number of operating cycles per hour.

Time between energization of the coil until the moment the contacts of the first current path to be closed actually close.

Time from the beginning of state causing breaking until the moment when the contacts of the last current path to be opened are open.

Shortest control duration to ensure complete closing or opening of a contactor.

Value of current which the contactor can withstand in closed position for a short time period and within specified conditions.

Ratio of inductance to the resistance : L/R = mH/Ohm = ms.