Eaton NR Installation And Operation Instructions Manual

Also see for COOPER POWER SERIES: Installation and operation instructions Installation instructions Installation instructions Installation and operation instructions Operation instructions

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Eaton NR Installation And Operation Instructions Manual Manual pdf 9 page image

5Type NR o il s w itch installation a n d o p e r a t ion instru c t ions INSTALLATION AND OPERATION INSTRUCTIONS MN230008EN November 2016Three-wire control with holding switchIf the controlling switch is energized for less than therequired 4.5 seconds, a factory-installed holding switchaccessory is required. However, the control circuit mustbe energized for at least one second for each operationto insure operation of the holding switch. A connectiondiagram for a three-wire control with a holding switch isshown in Figure 4.Figure 4 Three-wire control with holding switchSwitch operationElectrical operationThe switch may be opened and closed electrically byapplying rated control voltage to the proper terminals of theactuator terminal block.If the switch actuator does not respond to an electricaloperating signal, it may be that the main switch contacts arenot in synch with the electrical control. For example,if the switch is manually opened, an electrical OPEN signalmust be transmitted to bring the control into synch with theswitch contacts before an electrical CLOSE signal will closethe switch. The converse is also true.Manual operationWARNINGNever manually close this switch into a faulted line Themake-and-latch rating of the switch applies only whenit is electrically operated Closing a switch manually ona faulted line can result in death, severe personal injury,and equipment damage G127 0The switch may be manually opened by operating the yellowhandle under the sleet hood.

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