ABB Drive contactors Type DA & EHDB

ABB Drive contactors Type DA & EHDB

Description

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

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

Product Overview

DA Series: 60A rated, 500V DC rated, 160V and 300V DC normally closed dynamic braking ratings, 

2-pole (2-pole normally open) and 3-pole (2-pole normally open, 1-pole normally closed) options, auxiliary contacts available, double-break design, 

DIN-rail mounting, 85%-110% of rated control voltage range, UL and CSA listed.

EHDB Series: Rated 220 - 960A, available in 2 pole (2 normally open) and 3 pole (2 normally open, 1 normally closed), 

600V DC turning capacity and 300V DC breaking capacity, 1 normally open, 1 normally closed auxiliary contact as standard, 

extractable coil on some models for reversible applications, double break and interrupting chamber design, 85%-110% rated control voltage range, 

UL and CSA listed. UL and CSA listed.

Technical Data

DA Series: Normally open mains 60A (500VDC), Normally closed poles with different current values at different voltages, 

Connection wire sizes 8 - 1 AWG, Mechanical life of 5 million cycles, Electrical life of 1.5 million cycles, 

Operational frequency of 600 cycles/hour, Coils with different power consumption and action times, Weight approximately 2.4 lbs, 

Operating temperature -25°C to 50°C.

EHDB Series: Varying models with normally open main poles 220 - 960A (600VDC), 

normally closed poles with varying parameters, connecting wire sizes from 8 - 30 to (3) 2 - 600 kcmils, 5 million cycles mechanical life, 

1.5 million cycles electrical life, 300 cycles per hour operating frequency, coil power consumption and action times vary by AC and DC, 

weight 9.2 - 38 lbs. Operating temperature -40°C to 70°C.

ABB automatic transfer switch technical characteristics

Safe and reliable changeover mechanism: 

The changeover mechanism is equipped with three stabilising positions, 

which effectively isolate the two asynchronous power sources, 

fundamentally eliminating the risk of short-circuiting between 

the power sources and ensuring safety even in complex situations where transient voltages exist. 

The switch is set up for both manual and automatic operation modes and can be locked in a variety of ways to prevent misuse. 

In case of emergency, manual operation is not limited by the power supply, guaranteeing operational reliability.

Advanced Control Unit Functions: 

The OMD series control unit is feature-rich and can clearly display various system statuses, including line status, 

switch positions, alarm messages and operation modes. Users can conveniently configure them, 

and the OMD800 is equipped with an LCD display that supports eight languages, which greatly facilitates the use of users in different regions. 

The control unit can accurately measure various parameters of the power supply,

 such as three-phase and single-phase voltage, frequency, etc., and can flexibly set voltage thresholds, frequency thresholds, 

and a variety of time delay parameters to meet the needs of different application scenarios.

Wide application adaptability: 

The products cover a wide range of current sizes from 160 to 1600 amps, which can be adapted to equipment and systems

with different power requirements. The rated insulation voltage, operating voltage and other electrical parameters comply with a variety of standards, 

and can be used in industrial plants, terminals, airports, data centres and other places that require high reliability of power supply,