November 1989
●
New Issue
Printed in USA
Oil Switches
Types NR, NRV
Maintenance Instructions
1
S260-20-8
Service Information
WARNING:
Do not energize this equipment out
of oil. Operation out of oil will result in flashovers
that will damage the equipment and may cause severe
personal injury.
!
Figure 1.
Kyle
®
Type NR switch
These instructions do not claim to cover all details or variations in the equipment, procedure, or process described, nor to provide
directions for meeting every contingency during installation, operation, or maintenance. When additional information is desired to
satisfy a problem not covered sufficiently for the user’s purpose, please contact your Cooper Power Systems sales engineer.
Type NR: Serial No. 309900 and after
Type NRV: Serieal No. 10500 and after
Figure 2.
Kyle
®
Type NRV switch
89991KMA
89992KMA
CONTENTS:
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Description of Operation . . . . . . . . . . . . . . . . . . . . . . .
3
Ratings and Specifications . . . . . . . . . . . . . . . . . . . . .
3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Frequency of Maintenance . . . . . . . . . . . . . . . . . . . . .
4
Periodic Maintenance Inspection . . . . . . . . . . . . . . . .
4
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . .
4
Electrical Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Manual Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Oil Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Insulation Level Withstand Tests . . . . . . . . . . . . . . . . . . . 5
Shop Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bushings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Moving Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Stationary Contacts . . . . . . . . . . . . . . . . . . . . . . . . 7
Moving Contact Arm Assembiy . . . . . . . . . . . . . . . 8
Complete Contact Box Assembly . . . . . . . . . . . . . . 8
Actuator Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Selector and Holding Switches . . . . . . . . . . . . . . . . 9
Actuator Assembly Replacement . . . . . . . . . . . . . . 10
Greasing Recommendations . . . . . . . . . . . . . . . . . 11
Head Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Type NR-NRV Switch Service Parts (Figure 23) . . . . . . . . 12
Actuator and Housing Service Parts (Figure 24) . . . . . . . . 14
NOTICE: This document is also applicable to Cooper Power Systems
product serial numbers beginning with the characters CP57.
