What to do if Asco RC Switch tries to open or close, but cannot?
If your Asco RC Switch attempts to open or close but fails, verify the voltage to ensure the control line voltage is at least 90% of the nameplate coil voltage. Additionally, check the control line size and distance to confirm they meet the specified requirements. If a transformer is used, ensure it can handle the VA burden.
Why does my Asco RC Switch open and close repeatedly?
If your Asco RC Switch is opening and closing repeatedly, examine the wiring to ensure that the control stations are not simultaneously signaling the ASCO 920 to open and close. Also, check the control station to make sure it does not have overlapping contacts.
Details on mounting RC switches, including diagrams for enclosed and open-type switches.
Information on mechanical support and electrical connection for panelboard mounting and subpanel switches.
Instructions for connecting control circuit wires to clamp-type terminals.
Guidance on relubrication, recommended lubrication kits, and conditions requiring attention.
Procedures for checking contact condition, replacement criteria, and handling arc chutes.
Details on pilot lights, their function (Acc. 9A/9B), and installation requirements.
Information on auxiliary contacts (14A & 14B) for the ASCO 920, including wiring and mounting.
Details on accessory 47, an auxiliary relay panel for 2-wire control of ASCO 920.
Information on accessory 48, an auxiliary relay panel for 3-wire control of ASCO 920.
Details on accessory 49, an auxiliary relay for Form 3 control of ASCO 920.
Information on optional control line fuses (Acc. 52A, 52B, 52C) for ASCO 920 switches.
Details on manual controls (Acc. 53A, 53B, 53C, 53D) mounted on enclosure doors.
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