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, rage o0 or ur O�EC Open � 2 Transfer sv�ritch mechanism --- - ■ Transfer switch mechanism is electrically operated and mechanically held in the ��'`�`_��;� y°�^�� Source 1 and Source 2 positions. The transfer switch incorporates electrical and i " ``'rry� `�:_=:� mechanical interlocks to prevent inadvertent interconnection of the sources. � ,;4 iwi`.'`� i ~:�::_� � ;F��'"`T§� ��'� '' Independent break-before-make action is used for both 3-pole and 4-pole/switched . �,��- � �=�='� neutral switches. This design allows use of sync check operation when required or � , .., �' - . . - , i N�;,1 �, -�� � ��:�_ �_ , control of the operating speed of the transfer switch for proper transfer of motor _ � � u`'�'��' k� � and rectifier-based loads(programmed transition feature). ` � �'��`�"�~ ■ True 4-pole switching allows for proper ground(earth)fault sensing and consistent, � 4 v reliable operation for the life of the transfer switch. The neutral poles of the transfer � ,E.� . ._A _- =� switch have the same ratings as the phase poles and are operated by a common ;. --- crossbar mechanism, eliminating the possibility of incorrect neutral operation at any � point in the operating cycle, or due to failure of a neutral operator. �� . �` ` �' .— � ■ Electrical interlocks prevent simultaneous closing signals to normal and emergency contacts and interconnection of normal and emergency sources through the control wiring. ■ High pressure silver alloy contacts resist burning and pitting. Separate arcing surfaces further protect the main contacts. Contact wear is reduced by multiple leaf arc chutes that cool and quench the ares. Barriers separate the phases to prevent interphase flashover. A transparent protective cover allows visual inspection while inhibiting inadvertent contact with energized components. ■ Switch mechanism, including contact assemblies, is third-party certified to verify suitabili for a lications re uirin hi h endurance switchin ca abili for the life tY PP q 9 9 9 P tY of the transfer switch. Withstand and closing ratings are validated using the same set of contacts,further demonstrating the robust nature of the design. Specifications Voltage rating Transfer switches rated from 40 A through 1200 A are rated up to 600 VAC,50 or 60 Hz. �I Arc interruption Multiple leaf arc chutes cool and quench the ares.Barriers prevent interphase flashover. I Neutral bar A full current-rated neutral bar with lugs is standard on enclosed 3-pole transfer switches. I Au�ciliary contacts Two contacts(one for each source)are provided for customer use.Wired to terminal block for easy I� access.Rated at 10A continuous and 250 VAC maximum. Operating temperature -22°F(-30°C)to 140°F(60°C) Storage temperature -40°F(-40°C)to 140°F(60°C) Humidity Up to 95%relative,non-condensing Altitude Up to 10,000 ft(3,000 m)without derating Total transfer time(source-to- Will not exceed 6 cycles at 60 Hz with normal voltage applied to the actuator and without delayed source) transition enabled. Manual operation handles Transfer switches are equipped with permanently attached operating handles and quick-break, uick-make contact mechanisms suitable for manual o eration under de-ener ized conditions. Open transition/programmed—Controls the time required for the device to switch from source to source,so that the load-generated voltages decay to a safe level before connecting to an energized source. Recommended by NEMA MG-1 to prevent nuisance tripping breakers and load damage. Adjustable 0-60 seconds, default 0 seconds. Open transition/in-phase—Initiates open transition transfer when in-phase monitor senses both sources are in � phase. Operates in a break-before-make sequence. Includes ability to enable programmed transition as a backup. I If sources are not in phase within 120 seconds,the system will transfer using programmed transition. '� 5-1464q(1/15) RPv fl