contactor may be required to interrupt up to 200% current. The N.O. contacts are equipped with permanent magnet blowouts to meet this requirement.

Transcription

1 DP Contactors DC Control DP Definite Purpose Contactors are designed for DC adjustable speed drive circuits using silicon controlled rectifier switching and other controls where a combination of normally open and normally closed power contacts are required. In all applications, reduced panel space for contactor mounting is made possible through a compact design and the built-in N.C. dynamic brake power contact feature. In silicon controlled rectifier switching circuits, the SCR is normally phased back prior to contactor opening. Therefore, the N.O. contacts are not required to interrupt any appreciable current. Under abnormal conditions such as failure of the SCR or the control circuit, the contactor may be required to interrupt up to % current. The N.O. contacts are equipped with permanent magnet blowouts to meet this requirement. The dynamic brake N.C. contact is required to insert the dynamic brake resistor and therefore must make up to % of rated current each time the contactor is deenergized. Jogging is accomplished at low voltage and current. Therefore, the dynamic brake contact is rated at / of rated voltage and dynamic brake current. The permanent magnet blowouts provide this interrupting ability Normally Closed Double Break Power Contacts - made of silver cadmium oxide furnish "anti-weld" protection under overload conditions. Generous size contacts are long lasting, and maintenance-free. All N.C. power contacts supplied with permanent magnet blowouts to lengthen contact life. Normally Open Double Break Power Contacts - incorporate the same design features as the normally closed power poles. Permanent magnet blowouts are also furnished on d.c. load applications. Permanent Magnet Blowouts - mounted to surround the power contacts, function to quickly quench the arc when breaking loads, thereby increasing contact life and assuring positive load circuit interrupton. All normally closed poles are furnished with permanent magnet blowouts. Normally open poles can be supplied with or without blowouts as indicated in the circuit symbols shown on page J6. Stainless Steel Springs - maintain exact contact pressure and assure fast contact break (N.O.) and make (N.C.) Molded Coil - is layer wound, designed for continuous duty service. Coil construction resists moisture; thermal and mechanical stress. Coil connections are made to pressure type terminals. Free-Floating Armature-Magnet Frame - provide quiet, low vibration, low friction operation. Precision ground pole faces achieve an absolute air gap which prevents "hanging-up". Magnet frame is sized for fast, powerful operation and self-seating extends operational life. Auxiliary Contacts - for /4 contactors are available with with either the front mounted snap action type with quick connect terminals or the side mounted type with pressure terminals. Contacts for larger sizes in standard or special make-before-break contact combinations feature either standard double break silver-to-silver contacts or low power gold alloy contacts. Pressure Type Terminals - accessible, up-front location permits modern straight-thru wiring. Terminals accept stripped, unlugged wires.. Molded Housing - constructed of hot-molded, high impact, high arc resistant insulating material. This design totally encloses the contacts and operating magnet in separate compartments and functions to eliminate internal phase-to-phase short circuits.

2 DC CONTROL DP Contactors SCR Drive Contactors - N.O. or N.C. Power Drive Contactors Preferred Style VDC Max 7 4 DP7 7 DPA DP4 DP 6 DP 6 DP DP6 7 N.O. N.C. Fig.No. 7A 7A Open Type Catalog No DP7-- DP7-- DP7-6- DP7-7- DP7-74- DPA4- DPA7- DPA4- DPA- DPA- DP4-4- DP4-7- DP4-4- DP4-- DP4-- DP-4- DP-7- DP-4- DP-- DP-- DP-4- DP-7- DP-4- DP-- DP-- DP-4- DP-7- DP-4- DP-- DP-- DP6-4- DP6-7- DP6-4- DP6-- DP6-- $ Coil Table # Replace with appropriate coil voltage digit. 6 Hz/Voltage ( ) DC/Voltage ( ) 4 Coil Table # Replace with appropriate coil voltage suffix 6 Hz/Voltage Suffix DC/Voltage Suffix 7 / Drive Contactors - Old Style For New Installations Use Preferred Style 7 /4 DP DP 6 DP DP4 DP 6 DP 6 DP DP6 7 Open Type N.O. N.C. Fig.No. Catalog No. 7A 7-- $ DP-( ) 46. DP-( ) 4. DP-( ) 7. DP-( ) 44. DP-( ) 4. 6 DP-( ) 466. DP DP-- 4. DP-( ) 6. DP-( ). DP-( ) 6. DP-( ) 7. DP-( ) DP-( ). DP--. 7 DP--. DP-( ). DP-( ). DP-( ) 7. DP-( ) DP-( ). 6 DP-( ) 4. DP DP--. DP4-( ). DP4-( ) 7. DP4-( ) DP4-( ) 6. DP4-( ) 47 6 DP4-( ) 4. 7 DP4-4. DP-( ) 6 DP-( ) 4. DP-( ) 4. DP-( ). DP-( ). 6 DP-( ) 7. 7 DP DP-( ) 4. DP-( ) 47. DP-( ) 77. DP-( ) 44. DP-( ) 4. 6 DP-( ) DP DP-( ) 4. DP-( ) 44. DP-( ) 4. DP-( ) DP-( ) 7. 7 DP DP6-( ) 4. DP6-( ) DP6-( ) 44. DP6-( ) 44. DP6-( ) DP6-( ) 466. The N.C. contact is short time rated for Dynamic Braking applications. Refer to table on page J7 for N.C. contact ratings. 4

3 DC Control Auxiliary Contact Blocks Description Front mtd. aux. /4 Old Style & 4A. N.O. - N.C. right hand front mtg. N.O. - N.C. left hand front mtg. N.O. - N.C. for multiple front mtg. For /4 Old Style & 4- Amp. N.O. N.C. N.O. & N.C. N.O. low power. N.C. low power. N.O. & N.C. low power. N.O. Standard & N.C. low power. N.O. low power & N.C. standard. N.C. late break. N.O. & N.C. late break. N.C. lower power late break. N.O. & N.C. low power late break. N.O. low power & N.C. low power late break. Tandem mounting auxiliary. For 7 Bi-Pole (N.O. & N.C.). N.O. low power. N.C. low power. N.O. & N.C. late break. Bracket for mounting two additional contact blocks. NOT for /4A or 4A Factory Installed Addition Auxiliary Contact Blocks contain or contact depending on the type ordered, the table below lists max. # of contact blocks for each contactor rating. Maximum Front Mtd Side Mtd Aux. Amps LHS RHS LHS RHS Contacts N.O. N.C. /4 A or 4= A 4= 4 A or 4= 6 A = A = 4 4 A = 4 4 Terminal Polarity and Wiring Figures: Field Installation Kit Kit No M6 M64 M6 M6L M64L M6L M66 M6L M64E M6 4 M64LE M67 4 M6 4 M6DA M Reversing Kits /4 & 4-6 amps. contactors except 7 7 contactors 6 & for two -pole 7 contactors for two 7 contactors (Pole & -Pole) Reversing baseplate for /4 & 4 contactors Reversing baseplate for, 6 & 7 Reversing baseplate for, & 6 contactors Reversing baseplate for 6 & contactors Reversing baseplate for two -Pole 7 contactors Reversing baseplate for one -Pole 7 & one -Pole 7 contactors For, Pole 7 Amp DP Contactors Description Kit No M $ Maximum Front Mtd Side Mtd Aux. Amps LHS RHS LHS RHS Contacts N.O. N.C. A = A = A = 4 4 A = A 6 = M NOTE: -.. Kit includes one N.O. - N.C. auxiliary plus mounting hardware for installing rd and 4th auxiliary.. Contains mounting hardware only. Order auxiliary separately.. Without mounting bracket. Bracket required for mounting more than one extra auxiliary interlock. 4. Not for use on /4, 4 & 7 Amp.. If DC coil required then front Mtd Auxiliares not available & contact blocks restricted to & max. aux. contacts 4. contact listed also used to economise coil when DC operated. Symbols: N.O. Contact Contact with Blowout N.C. Contact + Positive Polarity Contacts without blowouts do not have any interrupting rating. Contactors with N.O. contacts and blowouts will interrupt % current under abnormal conditions.

4 DP6 Accessories DC Control Contactor Type Contact Kits - DP N.O. Contact N.C. Contact Kit No. Kit No. 7, /4A M $. M $. 7 4A DP A M. M7. DP 6A M 7. M 4. DP7 7A -. M4 66. DPA A MA 7. M 4. DP A M 7. M4. DP4 A M4 6. M4. DP 6A M6. M4. DP 6A M DP A DP6 7A DC Power Pack Kits - AC Coils DP6 7 Volts 6Hz 4 4 NOTE: For all DC Coils up to 6 Amp add $., for 6 & Amp. add $., 7 Amp. deduct - $. Contact s Kit No $ Auxiliary Contact /4 Thru A AC Amperes Volts Continuous Inrush Coil Kits - DP (AC) 7 /4 A 7 4A DP A DP 6 A DPA A DP7 7 A DP A DP4 A DP 6A DP 6A DP A DP6 7A 4,, 6 Volts /6Hz /4 4 6 /4 4 6 / V.A. -6Hz(Approx) Inrush Sealed V DC 4V DC (-pole N.O.) 4V DC (for -pole N.C.; -pole N.C.; -pole N.O. -pole N.O. & -pole N.C) Kit No. ML ML6 ML ML7 ML ML ML ML ML ML4 ML4 ML4 ML44 ML ML ML ML $ DC Contact - Amperes 7 N.O. Contacts N.C. Contacts (intermittent duty) 4V V Dynamic Brake Make Only - V Max. Jogging Break Only 6V Max. N.O. Contacts N.C. Contacts (intermittent duty) Dynamic Brake Jogging Make Only - Break Only 4V V V Max. 6V Max. 7 /4 7 4 DP DP 6 DP7 7 DP DPA (4V) (V) DP4 DP 6 DP 6 DP DP Note: Contact Kits for -pole include stationary contacts, movable contacts and contact spring except as noted for 7 size. Assembled kit for -pole including yoke with movable contacts and springs; stationary contacts.. For all pole combinations except -pole N.C. 4. These coils are for exact replacement at operating voltage and frequency listed.. Power pack assembly kit includes rectifier, economizing resistor and terminal block. Power Pack Kit must be used on all DC operated DP6 units 6. Values measured at rectifier power pack input. 7. It is necessary to phase back the SCR's so that contactor normally does not interrupt appreciable current. Contactors with blowouts and N.O. contacts will interupt % current under abnormal conditions.

5 DC Control Dimensions Dimensions - Approximate (Contactor base mounted vertically) For side mounted auxiliary contact blocks add /" per side to width dimension for all contactor sizes. /4 contactor contactor - 7 with front mounted auxiliary /4 contactor contactor - 7 with side mounted auxiliary 6 contactor - DP 7 contactor - DP7 6 & contactor - DP & DP contactor - DPA & 6 contactor - DP & DP 4 contactor - DP contactor - DP4 7 contactor - DP6