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INSTALLATION AND MAINTENANCE MANUAL
JOSLYN P/N 1457-40
AC SURGE PROTECTOR
400 Y/230 V RMS, 3φ, 4 WIRE, GROUNDED WYE
5900 Eastport Blvd., Bldg. V
Richmond, VA 23231-4453
Telephone (804) 236-3300
Facsimile (804) 236-4040
Excellence in Systems Protection
MAG/MNL145740(A)
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Summary of Contents for Joslyn 1457-40
- Page 1 INSTALLATION AND MAINTENANCE MANUAL JOSLYN P/N 1457-40 AC SURGE PROTECTOR 400 Y/230 V RMS, 3φ, 4 WIRE, GROUNDED WYE 5900 Eastport Blvd., Bldg. V Richmond, VA 23231-4453 Telephone (804) 236-3300 Facsimile (804) 236-4040 Excellence in Systems Protection MAG/MNL145740(A)
- Page 2 Theory of Operation ..................... Maintenance........................Figure 1 Dimensions ........................Figure 2 Connection Diagram ....................I. SPECIFICATIONS Joslyn P/N 1457-40 AC Surge Protector APPLICATION: 400Y/230 Vac, 3φ, 4 Wire plus Ground, Grounded Wye Voltage Rating Line-to-Neutral 220 - 250 Vac Power Rating...
- Page 3 Joslyn P/N 1457-40 AC Surge Protector The Joslyn AC Surge Protector P/N 1457-40 is intended for installation on power systems of nominally 400Y/230 Vac, (220-250 Vac phase to neutral), 4 wires plus ground, 3 phase, grounded wye, 50-60 Hz, unlimited kVA rating. It is intended to be installed at sites where there exists a conductor interconnecting the neutral service conductor and protector ground.
- Page 4 Joslyn P/N 1457-40 AC Surge Protector The purpose of the Joslyn AC Surge Protector, P/N 1457-40, is to provide voltage clamping whenever the instantaneous (surge) line-to-neutral voltage exceeds a level of approximately 500 volts peak. The protector responds in nanoseconds, and automatically restores itself to normal condition after termination of the surge condition.
- Page 5 Joslyn P/N 1457-40 AC Surge Protector The Joslyn AC Surge Protector, P/N 1457-40, requires no scheduled maintenance. There are no adjustments to make. Simple electrical tests will indicate the condition of the unit. The neon lights on the cover are used to monitor the condition of the protector. Proper operating conditions are indicated by the lights being lit.
- Page 6 Disconnect power. Remove the fuse and light bulb on the phase to be tested. Use a suitable Surge Protector Test Set, such as Joslyn Model 4010, which will measure varistor clamping voltage at 1mA, and connect test leads between the 9mm (3/8”) terminal on the arrester side of the fuse and the neutral terminal.
- Page 7 FIGURE 1 DIMENSIONS MAG/MNL145740(A)
- Page 8 JOSLYN ELECTRONIC SYSTEMS CORPORATION FIGURE 2 CONNECTION DIAGRAM MAG/MNL145740(A)
- Page 9 JOSLYN ELECTRONIC SYSTEMS CORPORATION FIGURE 3, INTERNAL CONFIGURATION MAG/MNL145740(A)