Abstract:
The invention relates to a procedure for supervising the operation of contact circuits in an elevator, which contact circuit (7) comprises safety contacts (6) connected in series with a contactor (8). The contactor (8) is energised when the safety contacts (6) are closed. The arithmetic mean (U(i)) of an alternating voltage (U(t)) in a voltage measuring circuit (3) during a measuring period (i) is monitored and, when a voltage change exceeding a given threshold value occurs, the number of measuring periods (N) elapsing from the time of the change from the stable state preceding the change until reaching the stable state again is counted, and when the number of measuring periods exceeds a predetermined value, an abnormal switching event is indicated.
Abstract:
Method for telemonitoring the condition and state of an elevator and for determining its need for maintenance by performing an automatic test run of the elevator car (1) in the elevator shaft (2) to collect data for use in an elevator telemonitoring process. The method of the present invention is characterized in that the aforesaid test run comprises a number of automatic test run cycles synchronized with respect to each other.
Abstract:
Method for telemonitoring the condition and state of an elevator and for determining its need for maintenance by performing an automatic test run of the elevator car (1) in the elevator shaft (2) to collect data for use in an elevator telemonitoring process. The method of the present invention is characterized in that the aforesaid test run comprises a number of automatic test run cycles synchronized with respect to each other.
Abstract:
Method for telemonitoring the condition and state of an elevator and for determining its need for maintenance by performing an automatic test run of the elevator car (1) in the elevator shaft (2) to collect data for use in an elevator telemonitoring process. The method of the present invention is characterized in that the aforesaid test run comprises a number of automatic test run cycles synchronized with respect to each other.
Abstract:
Method for telemonitoring the condition and state of an elevator and for determining its need for maintenance by performing an automatic test run of the elevator car (1) in the elevator shaft (2) to collect data for use in an elevator telemonitoring process. The method of the present invention is characterized in that the aforesaid test run comprises a number of automatic test run cycles synchronized with respect to each other.
Abstract:
The invention concerns a method and a system for ensuring the operation of the safety circuit of an elevator or escalator, said safety circuit containing safety contacts ( 10, 12, 14 ) connected in series with a contactor ( 16 ). In the method, the largest bypass current coming to the contactor in a fault situation is defined, a testing device ( 202 ) is connected in series with the safety circuit, said testing device containing at least one resistor ( 26 ), which is used to produce a desired test current that is larger than the largest bypass current, and the neutral point ( 18 ) of the safety circuit is shifted if the contactor ( 16 ) remains energized by the aforesaid test current.
Abstract:
Method for telemonitoring the condition and state of an elevator and for determining its need for maintenance by performing an automatic test run of the elevator car (1) in the elevator shaft (2) to collect data for use in an elevator telemonitoring process. The method of the present invention is characterized in that the aforesaid test run comprises a number of automatic test run cycles synchronized with respect to each other.
Abstract:
Method for telemonitoring the condition and state of an elevator and for determining its need for maintenance by performing an automatic test run of the elevator car (1) in the elevator shaft (2) to collect data for use in an elevator telemonitoring process. The method of the present invention is characterized in that the aforesaid test run comprises a number of automatic test run cycles synchronized with respect to each other.
Abstract:
Method for telemonitoring the condition and state of an elevator and for determining its need for maintenance by performing an automatic test run of the elevator car (1) in the elevator shaft (2) to collect data for use in an elevator telemonitoring process. The method of the present invention is characterized in that the aforesaid test run comprises a number of automatic test run cycles synchronized with respect to each other.