ABB Dynamic braking DC Drive Up to 960 A, 600V DC EHDB

Type EHDB

• 220 amps to 960 amps 

 • 2 pole (2 N.O.) and 3 pole (2 N.O. & 1 N.C.) power poles available 

 • 600 VDC making capacity: 300 VDC breaking capacity 

 • 1 N.O. & 1 N.C. auxiliary contacts are standard and up to six additional auxiliary contacts may be added to provide a total of 8 (4 N.O. & 4 N.C.) 

 • Early make & late break auxiliary contacts available 

 • Auxiliary contacts available to meet elevator standards 

 • EHDB 220, 280 & 360 contactors have withdrawable coils 

 • Mechanically interlocked contactors available for reversing applications 

 • Double break contact design with magnetic arc chamber extinguishes arc in shortest possible time 

 • High temperature encapsulated coil 

 • Easy removal of arc chute for quick inspection and change of contacts 

 • Operates over an extended voltage range of 85% to 110% of rated control voltage 

 • DC control operation available 

 • UL & CSA approved UL File # E36588 CSA File # LR19700

Type DA

• 60 amps size 

 • 500 volt DC ratings 

 • 160 and 300 volt DC normal closed ratings for dynamic braking 

 • Low energy auxiliary contacts available (17V, 5mA) 

 • Mechanically interlocked version available for reversing applications 

 • Small compact design • 2 pole (2 N.O.) and 3 pole (2 N.O. & 1 N.C.) available 

 • Additional auxiliary contact blocks available 

 • Auxiliary contacts available to meet elevator standards 

 • Fast, snap-on DIN rail mounting 

 • Double break contact design 

 • Captive terminal screws 

 • Touch-safe design: all connection terminals are protected against accidental touch 

 • Terminals supplied open for ease of wiring 

 • Operates over an extended voltage range of 85% to 110% of rated control voltage 

 • N.C. dynamic braking pole is easily added to two pole contactors 

 • Screwdriver guide holes 

 • Snap-on front mounted accessories 

 • UL and CSA approved

Description 

EHDB drive contactors are specifically designed for use with solid state D.C. adjustable speed drive systems. In drive applications, the contactor is not required to make or break the load during normal operation. The N.C. contact is used for dynamic braking applications. EHDB contactors are provided less terminal lugs.

DC operated contactors

EHDB220 – EHDB960 

DC and AC operated contactors have the same magnet structure except the DC coil includes a resistor and a normally closed late break auxiliary interlock. To order, substitute the code from the coil voltage selection chart and refer to the DC magnet coils chart for the price adder. DC operated contactors are supplied with 2 N.O. & 1 N.C. auxiliary contacts. One additional 1 N.O. & 1 N.C. auxiliary contact block can be mounted on the left side of the contactor.

Type DA75, 2 & 3 pole

DA75-20-11-Δ

DA75-21-21-Δ

DA75-21A-11-Δ

EHDB220C2P-ΔL

EHDB360C2P-ΔL

24V/50 81 N -
24V/60 81 F -
24V DC - Y Y
48V/60 83 G -
48V DC - W W
110/50, 110…120/60 84 1 1
125V DC - Q Q
208V/60 34 B B
220V DC - R R
240V/60 80 2 2
277V/60 42 C C
480V/60 51 4 4
600V/60 55 6 6